LibJS: Reorganize tests into subfolders

Libraries/LibJS/Tests/operators/assignment-operators.js

@@ -0,0 +1,61 @@
+load("test-common.js");
+
+try {
+    var x;
+
+    x = 1;
+    assert((x = 2) === 2);
+    assert(x === 2);
+
+    x = 1;
+    assert((x += 2) === 3);
+    assert(x === 3);
+
+    x = 3;
+    assert((x -= 2) === 1);
+    assert(x === 1);
+
+    x = 3;
+    assert((x *= 2) === 6);
+    assert(x === 6);
+
+    x = 6;
+    assert((x /= 2) === 3);
+    assert(x === 3);
+
+    x = 6;
+    assert((x %= 4) === 2);
+    assert(x === 2);
+
+    x = 2;
+    assert((x **= 3) === 8);
+    assert(x === 8);
+
+    x = 3;
+    assert((x &= 2) === 2);
+    assert(x === 2);
+
+    x = 3;
+    assert((x |= 4) === 7);
+    assert(x === 7);
+
+    x = 6;
+    assert((x ^= 2) === 4);
+    assert(x === 4);
+
+    x = 2;
+    assert((x <<= 2) === 8);
+    assert(x === 8);
+
+    x = 8;
+    assert((x >>= 2) === 2);
+    assert(x === 2);
+
+    x = -(2 ** 32 - 10);
+    assert((x >>>= 2) === 2);
+    assert(x === 2);
+
+    console.log("PASS");
+} catch (e) {
+    console.log("FAIL: " + e);
+}

Libraries/LibJS/Tests/operators/binary-bitwise-left-shift.js

@@ -0,0 +1,63 @@
+load("test-common.js");
+
+try {
+    assert((0 << 0) === 0);
+    assert((0 << 1) === 0);
+    assert((0 << 2) === 0);
+    assert((0 << 3) === 0);
+    assert((0 << 4) === 0);
+    assert((0 << 5) === 0);
+
+    assert((1 << 0) === 1);
+    assert((1 << 1) === 2);
+    assert((1 << 2) === 4);
+    assert((1 << 3) === 8);
+    assert((1 << 4) === 16);
+    assert((1 << 5) === 32);
+
+    assert((2 << 0) === 2);
+    assert((2 << 1) === 4);
+    assert((2 << 2) === 8);
+    assert((2 << 3) === 16);
+    assert((2 << 4) === 32);
+    assert((2 << 5) === 64);
+
+    assert((3 << 0) === 3);
+    assert((3 << 1) === 6);
+    assert((3 << 2) === 12);
+    assert((3 << 3) === 24);
+    assert((3 << 4) === 48);
+    assert((3 << 5) === 96);
+
+    assert((4 << 0) === 4);
+    assert((4 << 1) === 8);
+    assert((4 << 2) === 16);
+    assert((4 << 3) === 32);
+    assert((4 << 4) === 64);
+    assert((4 << 5) === 128);
+
+    assert((5 << 0) === 5);
+    assert((5 << 1) === 10);
+    assert((5 << 2) === 20);
+    assert((5 << 3) === 40);
+    assert((5 << 4) === 80);
+    assert((5 << 5) === 160);
+
+    var x = 3;
+    var y = 7;
+    assert(("42" << 6) === 2688);
+    assert((x << y) === 384);
+    assert((x << [[[[12]]]]) === 12288);
+    assert((undefined << y) === 0);
+    assert(("a" << "b") === 0);
+    assert((null << null) === 0);
+    assert((undefined << undefined) === 0);
+    assert((NaN << NaN) === 0);
+    assert((NaN << 6) === 0);
+    assert((Infinity << Infinity) === 0);
+    assert((-Infinity << Infinity) === 0);
+
+    console.log("PASS");
+} catch (e) {
+    console.log("FAIL: " + e);
+}

Libraries/LibJS/Tests/operators/binary-bitwise-or.js

@@ -0,0 +1,63 @@
+load("test-common.js");
+
+try {
+    assert((0 | 0) === 0);
+    assert((0 | 1) === 1);
+    assert((0 | 2) === 2);
+    assert((0 | 3) === 3);
+    assert((0 | 4) === 4);
+    assert((0 | 5) === 5);
+
+    assert((1 | 0) === 1);
+    assert((1 | 1) === 1);
+    assert((1 | 2) === 3);
+    assert((1 | 3) === 3);
+    assert((1 | 4) === 5);
+    assert((1 | 5) === 5);
+
+    assert((2 | 0) === 2);
+    assert((2 | 1) === 3);
+    assert((2 | 2) === 2);
+    assert((2 | 3) === 3);
+    assert((2 | 4) === 6);
+    assert((2 | 5) === 7);
+
+    assert((3 | 0) === 3);
+    assert((3 | 1) === 3);
+    assert((3 | 2) === 3);
+    assert((3 | 3) === 3);
+    assert((3 | 4) === 7);
+    assert((3 | 5) === 7);
+
+    assert((4 | 0) === 4);
+    assert((4 | 1) === 5);
+    assert((4 | 2) === 6);
+    assert((4 | 3) === 7);
+    assert((4 | 4) === 4);
+    assert((4 | 5) === 5);
+
+    assert((5 | 0) === 5);
+    assert((5 | 1) === 5);
+    assert((5 | 2) === 7);
+    assert((5 | 3) === 7);
+    assert((5 | 4) === 5);
+    assert((5 | 5) === 5);
+
+    var x = 3;
+    var y = 7;
+    assert(("42" | 6) === 46);
+    assert((x | y) === 7);
+    assert((x | [[[[12]]]]) === 15);
+    assert((undefined | y) === 7);
+    assert(("a" | "b") === 0);
+    assert((null | null) === 0);
+    assert((undefined | undefined) === 0);
+    assert((NaN | NaN) === 0);
+    assert((NaN | 6) === 6);
+    assert((Infinity | Infinity) === 0);
+    assert((-Infinity | Infinity) === 0);
+
+    console.log("PASS");
+} catch (e) {
+    console.log("FAIL: " + e);
+}

Libraries/LibJS/Tests/operators/binary-bitwise-right-shift.js

@@ -0,0 +1,63 @@
+load("test-common.js");
+
+try {
+    assert((0 >> 0) === 0);
+    assert((0 >> 1) === 0);
+    assert((0 >> 2) === 0);
+    assert((0 >> 3) === 0);
+    assert((0 >> 4) === 0);
+    assert((0 >> 5) === 0);
+
+    assert((1 >> 0) === 1);
+    assert((1 >> 1) === 0);
+    assert((1 >> 2) === 0);
+    assert((1 >> 3) === 0);
+    assert((1 >> 4) === 0);
+    assert((1 >> 5) === 0);
+
+    assert((5 >> 0) === 5);
+    assert((5 >> 1) === 2);
+    assert((5 >> 2) === 1);
+    assert((5 >> 3) === 0);
+    assert((5 >> 4) === 0);
+    assert((5 >> 5) === 0);
+
+    assert((42 >> 0) === 42);
+    assert((42 >> 1) === 21);
+    assert((42 >> 2) === 10);
+    assert((42 >> 3) === 5);
+    assert((42 >> 4) === 2);
+    assert((42 >> 5) === 1);
+
+    assert((-1 >> 0) === -1);
+    assert((-1 >> 1) === -1);
+    assert((-1 >> 2) === -1);
+    assert((-1 >> 3) === -1);
+    assert((-1 >> 4) === -1);
+    assert((-1 >> 5) === -1);
+
+    assert((-5 >> 0) === -5);
+    assert((-5 >> 1) === -3);
+    assert((-5 >> 2) === -2);
+    assert((-5 >> 3) === -1);
+    assert((-5 >> 4) === -1);
+    assert((-5 >> 5) === -1);
+
+    var x = 67;
+    var y = 4;
+    assert(("42" >> 3) === 5);
+    assert((x >> y) === 4);
+    assert((x >> [[[[5]]]]) === 2);
+    assert((undefined >> y) === 0);
+    assert(("a" >> "b") === 0);
+    assert((null >> null) === 0);
+    assert((undefined >> undefined) === 0);
+    assert((NaN >> NaN) === 0);
+    assert((6 >> NaN) === 6);
+    assert((Infinity >> Infinity) === 0);
+    assert((-Infinity >> Infinity) === 0);
+
+    console.log("PASS");
+} catch (e) {
+    console.log("FAIL: " + e);
+}

Libraries/LibJS/Tests/operators/binary-bitwise-unsigned-right-shift.js

@@ -0,0 +1,63 @@
+load("test-common.js");
+
+try {
+    assert((0 >>> 0) === 0);
+    assert((0 >>> 1) === 0);
+    assert((0 >>> 2) === 0);
+    assert((0 >>> 3) === 0);
+    assert((0 >>> 4) === 0);
+    assert((0 >>> 5) === 0);
+
+    assert((1 >>> 0) === 1);
+    assert((1 >>> 1) === 0);
+    assert((1 >>> 2) === 0);
+    assert((1 >>> 3) === 0);
+    assert((1 >>> 4) === 0);
+    assert((1 >>> 5) === 0);
+
+    assert((5 >>> 0) === 5);
+    assert((5 >>> 1) === 2);
+    assert((5 >>> 2) === 1);
+    assert((5 >>> 3) === 0);
+    assert((5 >>> 4) === 0);
+    assert((5 >>> 5) === 0);
+
+    assert((42 >>> 0) === 42);
+    assert((42 >>> 1) === 21);
+    assert((42 >>> 2) === 10);
+    assert((42 >>> 3) === 5);
+    assert((42 >>> 4) === 2);
+    assert((42 >>> 5) === 1);
+
+    assert((-1 >>> 0) === 4294967295);
+    assert((-1 >>> 1) === 2147483647);
+    assert((-1 >>> 2) === 1073741823);
+    assert((-1 >>> 3) === 536870911);
+    assert((-1 >>> 4) === 268435455);
+    assert((-1 >>> 5) === 134217727);
+
+    assert((-5 >>> 0) === 4294967291);
+    assert((-5 >>> 1) === 2147483645);
+    assert((-5 >>> 2) === 1073741822);
+    assert((-5 >>> 3) === 536870911);
+    assert((-5 >>> 4) === 268435455);
+    assert((-5 >>> 5) === 134217727);
+
+    var x = -67;
+    var y = 4;
+    assert(("-42" >>> 3) === 536870906);
+    assert((x >>> y) === 268435451);
+    assert((x >>> [[[[5]]]]) === 134217725);
+    assert((undefined >>> y) === 0);
+    assert(("a" >>> "b") === 0);
+    assert((null >>> null) === 0);
+    assert((undefined >>> undefined) === 0);
+    assert((NaN >>> NaN) === 0);
+    assert((6 >>> NaN) === 6);
+    assert((Infinity >>> Infinity) === 0);
+    assert((-Infinity >>> Infinity) === 0);
+
+    console.log("PASS");
+} catch (e) {
+    console.log("FAIL: " + e);
+}

Libraries/LibJS/Tests/operators/binary-relational.js

@@ -0,0 +1,735 @@
+load("test-common.js");
+
+try {
+    const vals = [
+        1,
+        2,
+        1.23,
+        2.34567,
+        1n,
+        2n,
+        [],
+        [1],
+        [2],
+        [1, 2],
+        "foo",
+        "fooo",
+        "🔥",
+        "❤️",
+        "bar",
+        {},
+        { a: 1 },
+        { a: 2 },
+        { b: 1 },
+        true,
+        false,
+        undefined,
+        null,
+        NaN,
+        +Infinity,
+        -Infinity,
+    ];
+
+    // Each row contains: xIndex, yIndex, (x < y), (x > y), (x <= y), (x >= y)
+    // where x = vals[xIndex], y = vals[yIndex]
+    // Table can be generated using a mature engine and the following code:
+    // for (var xIndex = 0; xIndex < vals.length; ++xIndex) {
+    //     for (var yIndex = 0; yIndex < vals.length; ++yIndex) {
+    //         var x = vals[xIndex];
+    //         var y = vals[yIndex];
+    //         console.log(`[${xIndex}, ${yIndex}, ${x < y}, ${x > y}, ${x <= y}, ${x >= y}]`);
+    //     }
+    // }
+    const table = [
+        [0, 0, false, false, true, true],
+        [0, 1, true, false, true, false],
+        [0, 2, true, false, true, false],
+        [0, 3, true, false, true, false],
+        [0, 4, false, false, true, true],
+        [0, 5, true, false, true, false],
+        [0, 6, false, true, false, true],
+        [0, 7, false, false, true, true],
+        [0, 8, true, false, true, false],
+        [0, 9, false, false, false, false],
+        [0, 10, false, false, false, false],
+        [0, 11, false, false, false, false],
+        [0, 12, false, false, false, false],
+        [0, 13, false, false, false, false],
+        [0, 14, false, false, false, false],
+        [0, 15, false, false, false, false],
+        [0, 16, false, false, false, false],
+        [0, 17, false, false, false, false],
+        [0, 18, false, false, false, false],
+        [0, 19, false, false, true, true],
+        [0, 20, false, true, false, true],
+        [0, 21, false, false, false, false],
+        [0, 22, false, true, false, true],
+        [0, 23, false, false, false, false],
+        [0, 24, true, false, true, false],
+        [0, 25, false, true, false, true],
+        [1, 0, false, true, false, true],
+        [1, 1, false, false, true, true],
+        [1, 2, false, true, false, true],
+        [1, 3, true, false, true, false],
+        [1, 4, false, true, false, true],
+        [1, 5, false, false, true, true],
+        [1, 6, false, true, false, true],
+        [1, 7, false, true, false, true],
+        [1, 8, false, false, true, true],
+        [1, 9, false, false, false, false],
+        [1, 10, false, false, false, false],
+        [1, 11, false, false, false, false],
+        [1, 12, false, false, false, false],
+        [1, 13, false, false, false, false],
+        [1, 14, false, false, false, false],
+        [1, 15, false, false, false, false],
+        [1, 16, false, false, false, false],
+        [1, 17, false, false, false, false],
+        [1, 18, false, false, false, false],
+        [1, 19, false, true, false, true],
+        [1, 20, false, true, false, true],
+        [1, 21, false, false, false, false],
+        [1, 22, false, true, false, true],
+        [1, 23, false, false, false, false],
+        [1, 24, true, false, true, false],
+        [1, 25, false, true, false, true],
+        [2, 0, false, true, false, true],
+        [2, 1, true, false, true, false],
+        [2, 2, false, false, true, true],
+        [2, 3, true, false, true, false],
+        [2, 4, false, true, false, true],
+        [2, 5, true, false, true, false],
+        [2, 6, false, true, false, true],
+        [2, 7, false, true, false, true],
+        [2, 8, true, false, true, false],
+        [2, 9, false, false, false, false],
+        [2, 10, false, false, false, false],
+        [2, 11, false, false, false, false],
+        [2, 12, false, false, false, false],
+        [2, 13, false, false, false, false],
+        [2, 14, false, false, false, false],
+        [2, 15, false, false, false, false],
+        [2, 16, false, false, false, false],
+        [2, 17, false, false, false, false],
+        [2, 18, false, false, false, false],
+        [2, 19, false, true, false, true],
+        [2, 20, false, true, false, true],
+        [2, 21, false, false, false, false],
+        [2, 22, false, true, false, true],
+        [2, 23, false, false, false, false],
+        [2, 24, true, false, true, false],
+        [2, 25, false, true, false, true],
+        [3, 0, false, true, false, true],
+        [3, 1, false, true, false, true],
+        [3, 2, false, true, false, true],
+        [3, 3, false, false, true, true],
+        [3, 4, false, true, false, true],
+        [3, 5, false, true, false, true],
+        [3, 6, false, true, false, true],
+        [3, 7, false, true, false, true],
+        [3, 8, false, true, false, true],
+        [3, 9, false, false, false, false],
+        [3, 10, false, false, false, false],
+        [3, 11, false, false, false, false],
+        [3, 12, false, false, false, false],
+        [3, 13, false, false, false, false],
+        [3, 14, false, false, false, false],
+        [3, 15, false, false, false, false],
+        [3, 16, false, false, false, false],
+        [3, 17, false, false, false, false],
+        [3, 18, false, false, false, false],
+        [3, 19, false, true, false, true],
+        [3, 20, false, true, false, true],
+        [3, 21, false, false, false, false],
+        [3, 22, false, true, false, true],
+        [3, 23, false, false, false, false],
+        [3, 24, true, false, true, false],
+        [3, 25, false, true, false, true],
+        [4, 0, false, false, true, true],
+        [4, 1, true, false, true, false],
+        [4, 2, true, false, true, false],
+        [4, 3, true, false, true, false],
+        [4, 4, false, false, true, true],
+        [4, 5, true, false, true, false],
+        [4, 6, false, true, false, true],
+        [4, 7, false, false, true, true],
+        [4, 8, true, false, true, false],
+        [4, 9, false, false, false, false],
+        [4, 10, false, false, false, false],
+        [4, 11, false, false, false, false],
+        [4, 12, false, false, false, false],
+        [4, 13, false, false, false, false],
+        [4, 14, false, false, false, false],
+        [4, 15, false, false, false, false],
+        [4, 16, false, false, false, false],
+        [4, 17, false, false, false, false],
+        [4, 18, false, false, false, false],
+        [4, 19, false, false, true, true],
+        [4, 20, false, true, false, true],
+        [4, 21, false, false, false, false],
+        [4, 22, false, true, false, true],
+        [4, 23, false, false, false, false],
+        [4, 24, true, false, true, false],
+        [4, 25, false, true, false, true],
+        [5, 0, false, true, false, true],
+        [5, 1, false, false, true, true],
+        [5, 2, false, true, false, true],
+        [5, 3, true, false, true, false],
+        [5, 4, false, true, false, true],
+        [5, 5, false, false, true, true],
+        [5, 6, false, true, false, true],
+        [5, 7, false, true, false, true],
+        [5, 8, false, false, true, true],
+        [5, 9, false, false, false, false],
+        [5, 10, false, false, false, false],
+        [5, 11, false, false, false, false],
+        [5, 12, false, false, false, false],
+        [5, 13, false, false, false, false],
+        [5, 14, false, false, false, false],
+        [5, 15, false, false, false, false],
+        [5, 16, false, false, false, false],
+        [5, 17, false, false, false, false],
+        [5, 18, false, false, false, false],
+        [5, 19, false, true, false, true],
+        [5, 20, false, true, false, true],
+        [5, 21, false, false, false, false],
+        [5, 22, false, true, false, true],
+        [5, 23, false, false, false, false],
+        [5, 24, true, false, true, false],
+        [5, 25, false, true, false, true],
+        [6, 0, true, false, true, false],
+        [6, 1, true, false, true, false],
+        [6, 2, true, false, true, false],
+        [6, 3, true, false, true, false],
+        [6, 4, true, false, true, false],
+        [6, 5, true, false, true, false],
+        [6, 6, false, false, true, true],
+        [6, 7, true, false, true, false],
+        [6, 8, true, false, true, false],
+        [6, 9, true, false, true, false],
+        [6, 10, true, false, true, false],
+        [6, 11, true, false, true, false],
+        [6, 12, true, false, true, false],
+        [6, 13, true, false, true, false],
+        [6, 14, true, false, true, false],
+        [6, 15, true, false, true, false],
+        [6, 16, true, false, true, false],
+        [6, 17, true, false, true, false],
+        [6, 18, true, false, true, false],
+        [6, 19, true, false, true, false],
+        [6, 20, false, false, true, true],
+        [6, 21, false, false, false, false],
+        [6, 22, false, false, true, true],
+        [6, 23, false, false, false, false],
+        [6, 24, true, false, true, false],
+        [6, 25, false, true, false, true],
+        [7, 0, false, false, true, true],
+        [7, 1, true, false, true, false],
+        [7, 2, true, false, true, false],
+        [7, 3, true, false, true, false],
+        [7, 4, false, false, true, true],
+        [7, 5, true, false, true, false],
+        [7, 6, false, true, false, true],
+        [7, 7, false, false, true, true],
+        [7, 8, true, false, true, false],
+        [7, 9, true, false, true, false],
+        [7, 10, true, false, true, false],
+        [7, 11, true, false, true, false],
+        [7, 12, true, false, true, false],
+        [7, 13, true, false, true, false],
+        [7, 14, true, false, true, false],
+        [7, 15, true, false, true, false],
+        [7, 16, true, false, true, false],
+        [7, 17, true, false, true, false],
+        [7, 18, true, false, true, false],
+        [7, 19, false, false, true, true],
+        [7, 20, false, true, false, true],
+        [7, 21, false, false, false, false],
+        [7, 22, false, true, false, true],
+        [7, 23, false, false, false, false],
+        [7, 24, true, false, true, false],
+        [7, 25, false, true, false, true],
+        [8, 0, false, true, false, true],
+        [8, 1, false, false, true, true],
+        [8, 2, false, true, false, true],
+        [8, 3, true, false, true, false],
+        [8, 4, false, true, false, true],
+        [8, 5, false, false, true, true],
+        [8, 6, false, true, false, true],
+        [8, 7, false, true, false, true],
+        [8, 8, false, false, true, true],
+        [8, 9, false, true, false, true],
+        [8, 10, true, false, true, false],
+        [8, 11, true, false, true, false],
+        [8, 12, true, false, true, false],
+        [8, 13, true, false, true, false],
+        [8, 14, true, false, true, false],
+        [8, 15, true, false, true, false],
+        [8, 16, true, false, true, false],
+        [8, 17, true, false, true, false],
+        [8, 18, true, false, true, false],
+        [8, 19, false, true, false, true],
+        [8, 20, false, true, false, true],
+        [8, 21, false, false, false, false],
+        [8, 22, false, true, false, true],
+        [8, 23, false, false, false, false],
+        [8, 24, true, false, true, false],
+        [8, 25, false, true, false, true],
+        [9, 0, false, false, false, false],
+        [9, 1, false, false, false, false],
+        [9, 2, false, false, false, false],
+        [9, 3, false, false, false, false],
+        [9, 4, false, false, false, false],
+        [9, 5, false, false, false, false],
+        [9, 6, false, true, false, true],
+        [9, 7, false, true, false, true],
+        [9, 8, true, false, true, false],
+        [9, 9, false, false, true, true],
+        [9, 10, true, false, true, false],
+        [9, 11, true, false, true, false],
+        [9, 12, true, false, true, false],
+        [9, 13, true, false, true, false],
+        [9, 14, true, false, true, false],
+        [9, 15, true, false, true, false],
+        [9, 16, true, false, true, false],
+        [9, 17, true, false, true, false],
+        [9, 18, true, false, true, false],
+        [9, 19, false, false, false, false],
+        [9, 20, false, false, false, false],
+        [9, 21, false, false, false, false],
+        [9, 22, false, false, false, false],
+        [9, 23, false, false, false, false],
+        [9, 24, false, false, false, false],
+        [9, 25, false, false, false, false],
+        [10, 0, false, false, false, false],
+        [10, 1, false, false, false, false],
+        [10, 2, false, false, false, false],
+        [10, 3, false, false, false, false],
+        [10, 4, false, false, false, false],
+        [10, 5, false, false, false, false],
+        [10, 6, false, true, false, true],
+        [10, 7, false, true, false, true],
+        [10, 8, false, true, false, true],
+        [10, 9, false, true, false, true],
+        [10, 10, false, false, true, true],
+        [10, 11, true, false, true, false],
+        [10, 12, true, false, true, false],
+        [10, 13, true, false, true, false],
+        [10, 14, false, true, false, true],
+        [10, 15, false, true, false, true],
+        [10, 16, false, true, false, true],
+        [10, 17, false, true, false, true],
+        [10, 18, false, true, false, true],
+        [10, 19, false, false, false, false],
+        [10, 20, false, false, false, false],
+        [10, 21, false, false, false, false],
+        [10, 22, false, false, false, false],
+        [10, 23, false, false, false, false],
+        [10, 24, false, false, false, false],
+        [10, 25, false, false, false, false],
+        [11, 0, false, false, false, false],
+        [11, 1, false, false, false, false],
+        [11, 2, false, false, false, false],
+        [11, 3, false, false, false, false],
+        [11, 4, false, false, false, false],
+        [11, 5, false, false, false, false],
+        [11, 6, false, true, false, true],
+        [11, 7, false, true, false, true],
+        [11, 8, false, true, false, true],
+        [11, 9, false, true, false, true],
+        [11, 10, false, true, false, true],
+        [11, 11, false, false, true, true],
+        [11, 12, true, false, true, false],
+        [11, 13, true, false, true, false],
+        [11, 14, false, true, false, true],
+        [11, 15, false, true, false, true],
+        [11, 16, false, true, false, true],
+        [11, 17, false, true, false, true],
+        [11, 18, false, true, false, true],
+        [11, 19, false, false, false, false],
+        [11, 20, false, false, false, false],
+        [11, 21, false, false, false, false],
+        [11, 22, false, false, false, false],
+        [11, 23, false, false, false, false],
+        [11, 24, false, false, false, false],
+        [11, 25, false, false, false, false],
+        [12, 0, false, false, false, false],
+        [12, 1, false, false, false, false],
+        [12, 2, false, false, false, false],
+        [12, 3, false, false, false, false],
+        [12, 4, false, false, false, false],
+        [12, 5, false, false, false, false],
+        [12, 6, false, true, false, true],
+        [12, 7, false, true, false, true],
+        [12, 8, false, true, false, true],
+        [12, 9, false, true, false, true],
+        [12, 10, false, true, false, true],
+        [12, 11, false, true, false, true],
+        [12, 12, false, false, true, true],
+        [12, 13, false, true, false, true],
+        [12, 14, false, true, false, true],
+        [12, 15, false, true, false, true],
+        [12, 16, false, true, false, true],
+        [12, 17, false, true, false, true],
+        [12, 18, false, true, false, true],
+        [12, 19, false, false, false, false],
+        [12, 20, false, false, false, false],
+        [12, 21, false, false, false, false],
+        [12, 22, false, false, false, false],
+        [12, 23, false, false, false, false],
+        [12, 24, false, false, false, false],
+        [12, 25, false, false, false, false],
+        [13, 0, false, false, false, false],
+        [13, 1, false, false, false, false],
+        [13, 2, false, false, false, false],
+        [13, 3, false, false, false, false],
+        [13, 4, false, false, false, false],
+        [13, 5, false, false, false, false],
+        [13, 6, false, true, false, true],
+        [13, 7, false, true, false, true],
+        [13, 8, false, true, false, true],
+        [13, 9, false, true, false, true],
+        [13, 10, false, true, false, true],
+        [13, 11, false, true, false, true],
+        [13, 12, true, false, true, false],
+        [13, 13, false, false, true, true],
+        [13, 14, false, true, false, true],
+        [13, 15, false, true, false, true],
+        [13, 16, false, true, false, true],
+        [13, 17, false, true, false, true],
+        [13, 18, false, true, false, true],
+        [13, 19, false, false, false, false],
+        [13, 20, false, false, false, false],
+        [13, 21, false, false, false, false],
+        [13, 22, false, false, false, false],
+        [13, 23, false, false, false, false],
+        [13, 24, false, false, false, false],
+        [13, 25, false, false, false, false],
+        [14, 0, false, false, false, false],
+        [14, 1, false, false, false, false],
+        [14, 2, false, false, false, false],
+        [14, 3, false, false, false, false],
+        [14, 4, false, false, false, false],
+        [14, 5, false, false, false, false],
+        [14, 6, false, true, false, true],
+        [14, 7, false, true, false, true],
+        [14, 8, false, true, false, true],
+        [14, 9, false, true, false, true],
+        [14, 10, true, false, true, false],
+        [14, 11, true, false, true, false],
+        [14, 12, true, false, true, false],
+        [14, 13, true, false, true, false],
+        [14, 14, false, false, true, true],
+        [14, 15, false, true, false, true],
+        [14, 16, false, true, false, true],
+        [14, 17, false, true, false, true],
+        [14, 18, false, true, false, true],
+        [14, 19, false, false, false, false],
+        [14, 20, false, false, false, false],
+        [14, 21, false, false, false, false],
+        [14, 22, false, false, false, false],
+        [14, 23, false, false, false, false],
+        [14, 24, false, false, false, false],
+        [14, 25, false, false, false, false],
+        [15, 0, false, false, false, false],
+        [15, 1, false, false, false, false],
+        [15, 2, false, false, false, false],
+        [15, 3, false, false, false, false],
+        [15, 4, false, false, false, false],
+        [15, 5, false, false, false, false],
+        [15, 6, false, true, false, true],
+        [15, 7, false, true, false, true],
+        [15, 8, false, true, false, true],
+        [15, 9, false, true, false, true],
+        [15, 10, true, false, true, false],
+        [15, 11, true, false, true, false],
+        [15, 12, true, false, true, false],
+        [15, 13, true, false, true, false],
+        [15, 14, true, false, true, false],
+        [15, 15, false, false, true, true],
+        [15, 16, false, false, true, true],
+        [15, 17, false, false, true, true],
+        [15, 18, false, false, true, true],
+        [15, 19, false, false, false, false],
+        [15, 20, false, false, false, false],
+        [15, 21, false, false, false, false],
+        [15, 22, false, false, false, false],
+        [15, 23, false, false, false, false],
+        [15, 24, false, false, false, false],
+        [15, 25, false, false, false, false],
+        [16, 0, false, false, false, false],
+        [16, 1, false, false, false, false],
+        [16, 2, false, false, false, false],
+        [16, 3, false, false, false, false],
+        [16, 4, false, false, false, false],
+        [16, 5, false, false, false, false],
+        [16, 6, false, true, false, true],
+        [16, 7, false, true, false, true],
+        [16, 8, false, true, false, true],
+        [16, 9, false, true, false, true],
+        [16, 10, true, false, true, false],
+        [16, 11, true, false, true, false],
+        [16, 12, true, false, true, false],
+        [16, 13, true, false, true, false],
+        [16, 14, true, false, true, false],
+        [16, 15, false, false, true, true],
+        [16, 16, false, false, true, true],
+        [16, 17, false, false, true, true],
+        [16, 18, false, false, true, true],
+        [16, 19, false, false, false, false],
+        [16, 20, false, false, false, false],
+        [16, 21, false, false, false, false],
+        [16, 22, false, false, false, false],
+        [16, 23, false, false, false, false],
+        [16, 24, false, false, false, false],
+        [16, 25, false, false, false, false],
+        [17, 0, false, false, false, false],
+        [17, 1, false, false, false, false],
+        [17, 2, false, false, false, false],
+        [17, 3, false, false, false, false],
+        [17, 4, false, false, false, false],
+        [17, 5, false, false, false, false],
+        [17, 6, false, true, false, true],
+        [17, 7, false, true, false, true],
+        [17, 8, false, true, false, true],
+        [17, 9, false, true, false, true],
+        [17, 10, true, false, true, false],
+        [17, 11, true, false, true, false],
+        [17, 12, true, false, true, false],
+        [17, 13, true, false, true, false],
+        [17, 14, true, false, true, false],
+        [17, 15, false, false, true, true],
+        [17, 16, false, false, true, true],
+        [17, 17, false, false, true, true],
+        [17, 18, false, false, true, true],
+        [17, 19, false, false, false, false],
+        [17, 20, false, false, false, false],
+        [17, 21, false, false, false, false],
+        [17, 22, false, false, false, false],
+        [17, 23, false, false, false, false],
+        [17, 24, false, false, false, false],
+        [17, 25, false, false, false, false],
+        [18, 0, false, false, false, false],
+        [18, 1, false, false, false, false],
+        [18, 2, false, false, false, false],
+        [18, 3, false, false, false, false],
+        [18, 4, false, false, false, false],
+        [18, 5, false, false, false, false],
+        [18, 6, false, true, false, true],
+        [18, 7, false, true, false, true],
+        [18, 8, false, true, false, true],
+        [18, 9, false, true, false, true],
+        [18, 10, true, false, true, false],
+        [18, 11, true, false, true, false],
+        [18, 12, true, false, true, false],
+        [18, 13, true, false, true, false],
+        [18, 14, true, false, true, false],
+        [18, 15, false, false, true, true],
+        [18, 16, false, false, true, true],
+        [18, 17, false, false, true, true],
+        [18, 18, false, false, true, true],
+        [18, 19, false, false, false, false],
+        [18, 20, false, false, false, false],
+        [18, 21, false, false, false, false],
+        [18, 22, false, false, false, false],
+        [18, 23, false, false, false, false],
+        [18, 24, false, false, false, false],
+        [18, 25, false, false, false, false],
+        [19, 0, false, false, true, true],
+        [19, 1, true, false, true, false],
+        [19, 2, true, false, true, false],
+        [19, 3, true, false, true, false],
+        [19, 4, false, false, true, true],
+        [19, 5, true, false, true, false],
+        [19, 6, false, true, false, true],
+        [19, 7, false, false, true, true],
+        [19, 8, true, false, true, false],
+        [19, 9, false, false, false, false],
+        [19, 10, false, false, false, false],
+        [19, 11, false, false, false, false],
+        [19, 12, false, false, false, false],
+        [19, 13, false, false, false, false],
+        [19, 14, false, false, false, false],
+        [19, 15, false, false, false, false],
+        [19, 16, false, false, false, false],
+        [19, 17, false, false, false, false],
+        [19, 18, false, false, false, false],
+        [19, 19, false, false, true, true],
+        [19, 20, false, true, false, true],
+        [19, 21, false, false, false, false],
+        [19, 22, false, true, false, true],
+        [19, 23, false, false, false, false],
+        [19, 24, true, false, true, false],
+        [19, 25, false, true, false, true],
+        [20, 0, true, false, true, false],
+        [20, 1, true, false, true, false],
+        [20, 2, true, false, true, false],
+        [20, 3, true, false, true, false],
+        [20, 4, true, false, true, false],
+        [20, 5, true, false, true, false],
+        [20, 6, false, false, true, true],
+        [20, 7, true, false, true, false],
+        [20, 8, true, false, true, false],
+        [20, 9, false, false, false, false],
+        [20, 10, false, false, false, false],
+        [20, 11, false, false, false, false],
+        [20, 12, false, false, false, false],
+        [20, 13, false, false, false, false],
+        [20, 14, false, false, false, false],
+        [20, 15, false, false, false, false],
+        [20, 16, false, false, false, false],
+        [20, 17, false, false, false, false],
+        [20, 18, false, false, false, false],
+        [20, 19, true, false, true, false],
+        [20, 20, false, false, true, true],
+        [20, 21, false, false, false, false],
+        [20, 22, false, false, true, true],
+        [20, 23, false, false, false, false],
+        [20, 24, true, false, true, false],
+        [20, 25, false, true, false, true],
+        [21, 0, false, false, false, false],
+        [21, 1, false, false, false, false],
+        [21, 2, false, false, false, false],
+        [21, 3, false, false, false, false],
+        [21, 4, false, false, false, false],
+        [21, 5, false, false, false, false],
+        [21, 6, false, false, false, false],
+        [21, 7, false, false, false, false],
+        [21, 8, false, false, false, false],
+        [21, 9, false, false, false, false],
+        [21, 10, false, false, false, false],
+        [21, 11, false, false, false, false],
+        [21, 12, false, false, false, false],
+        [21, 13, false, false, false, false],
+        [21, 14, false, false, false, false],
+        [21, 15, false, false, false, false],
+        [21, 16, false, false, false, false],
+        [21, 17, false, false, false, false],
+        [21, 18, false, false, false, false],
+        [21, 19, false, false, false, false],
+        [21, 20, false, false, false, false],
+        [21, 21, false, false, false, false],
+        [21, 22, false, false, false, false],
+        [21, 23, false, false, false, false],
+        [21, 24, false, false, false, false],
+        [21, 25, false, false, false, false],
+        [22, 0, true, false, true, false],
+        [22, 1, true, false, true, false],
+        [22, 2, true, false, true, false],
+        [22, 3, true, false, true, false],
+        [22, 4, true, false, true, false],
+        [22, 5, true, false, true, false],
+        [22, 6, false, false, true, true],
+        [22, 7, true, false, true, false],
+        [22, 8, true, false, true, false],
+        [22, 9, false, false, false, false],
+        [22, 10, false, false, false, false],
+        [22, 11, false, false, false, false],
+        [22, 12, false, false, false, false],
+        [22, 13, false, false, false, false],
+        [22, 14, false, false, false, false],
+        [22, 15, false, false, false, false],
+        [22, 16, false, false, false, false],
+        [22, 17, false, false, false, false],
+        [22, 18, false, false, false, false],
+        [22, 19, true, false, true, false],
+        [22, 20, false, false, true, true],
+        [22, 21, false, false, false, false],
+        [22, 22, false, false, true, true],
+        [22, 23, false, false, false, false],
+        [22, 24, true, false, true, false],
+        [22, 25, false, true, false, true],
+        [23, 0, false, false, false, false],
+        [23, 1, false, false, false, false],
+        [23, 2, false, false, false, false],
+        [23, 3, false, false, false, false],
+        [23, 4, false, false, false, false],
+        [23, 5, false, false, false, false],
+        [23, 6, false, false, false, false],
+        [23, 7, false, false, false, false],
+        [23, 8, false, false, false, false],
+        [23, 9, false, false, false, false],
+        [23, 10, false, false, false, false],
+        [23, 11, false, false, false, false],
+        [23, 12, false, false, false, false],
+        [23, 13, false, false, false, false],
+        [23, 14, false, false, false, false],
+        [23, 15, false, false, false, false],
+        [23, 16, false, false, false, false],
+        [23, 17, false, false, false, false],
+        [23, 18, false, false, false, false],
+        [23, 19, false, false, false, false],
+        [23, 20, false, false, false, false],
+        [23, 21, false, false, false, false],
+        [23, 22, false, false, false, false],
+        [23, 23, false, false, false, false],
+        [23, 24, false, false, false, false],
+        [23, 25, false, false, false, false],
+        [24, 0, false, true, false, true],
+        [24, 1, false, true, false, true],
+        [24, 2, false, true, false, true],
+        [24, 3, false, true, false, true],
+        [24, 4, false, true, false, true],
+        [24, 5, false, true, false, true],
+        [24, 6, false, true, false, true],
+        [24, 7, false, true, false, true],
+        [24, 8, false, true, false, true],
+        [24, 9, false, false, false, false],
+        [24, 10, false, false, false, false],
+        [24, 11, false, false, false, false],
+        [24, 12, false, false, false, false],
+        [24, 13, false, false, false, false],
+        [24, 14, false, false, false, false],
+        [24, 15, false, false, false, false],
+        [24, 16, false, false, false, false],
+        [24, 17, false, false, false, false],
+        [24, 18, false, false, false, false],
+        [24, 19, false, true, false, true],
+        [24, 20, false, true, false, true],
+        [24, 21, false, false, false, false],
+        [24, 22, false, true, false, true],
+        [24, 23, false, false, false, false],
+        [24, 24, false, false, true, true],
+        [24, 25, false, true, false, true],
+        [25, 0, true, false, true, false],
+        [25, 1, true, false, true, false],
+        [25, 2, true, false, true, false],
+        [25, 3, true, false, true, false],
+        [25, 4, true, false, true, false],
+        [25, 5, true, false, true, false],
+        [25, 6, true, false, true, false],
+        [25, 7, true, false, true, false],
+        [25, 8, true, false, true, false],
+        [25, 9, false, false, false, false],
+        [25, 10, false, false, false, false],
+        [25, 11, false, false, false, false],
+        [25, 12, false, false, false, false],
+        [25, 13, false, false, false, false],
+        [25, 14, false, false, false, false],
+        [25, 15, false, false, false, false],
+        [25, 16, false, false, false, false],
+        [25, 17, false, false, false, false],
+        [25, 18, false, false, false, false],
+        [25, 19, true, false, true, false],
+        [25, 20, true, false, true, false],
+        [25, 21, false, false, false, false],
+        [25, 22, true, false, true, false],
+        [25, 23, false, false, false, false],
+        [25, 24, true, false, true, false],
+        [25, 25, false, false, true, true],
+    ];
+
+    for (let test of table) {
+        let x = vals[test[0]];
+        let y = vals[test[1]];
+
+        assert(x < y === test[2]);
+        assert(x > y === test[3]);
+        assert(x <= y === test[4]);
+        assert(x >= y === test[5]);
+    }
+
+    console.log("PASS");
+} catch (e) {
+    console.log("FAIL: " + e);
+}

Libraries/LibJS/Tests/operators/comma-operator.js

@@ -0,0 +1,26 @@
+load("test-common.js");
+
+try {
+    assert((1, 2, 3) === 3);
+    assert((1, 2 + 3, 4) === 4);
+
+    var foo = 0;
+    foo = (foo++, foo);
+    assert(foo === 1);
+
+    var a, b, c;
+    assert((a = b = 3, c = 4) === 4);
+    assert(a === 3);
+    assert(b === 3);
+    assert(c === 4);
+
+    var x, y, z;
+    assert((x = (y = 5, z = 6)) === 6);
+    assert(x === 6)
+    assert(y === 5)
+    assert(z === 6)
+
+    console.log("PASS");
+} catch (e) {
+    console.log("FAIL: " + e);
+}

Libraries/LibJS/Tests/operators/delete-basic.js

@@ -0,0 +1,60 @@
+load("test-common.js");
+
+try {
+    o = {};
+    o.x = 1;
+    o.y = 2;
+    o.z = 3;
+    assert(Object.getOwnPropertyNames(o).length === 3);
+
+    assert(delete o.x === true);
+    assert(o.hasOwnProperty('x') === false);
+    assert(o.hasOwnProperty('y') === true);
+    assert(o.hasOwnProperty('z') === true);
+    assert(Object.getOwnPropertyNames(o).length === 2);
+
+    assert(delete o.y === true);
+    assert(o.hasOwnProperty('x') === false);
+    assert(o.hasOwnProperty('y') === false);
+    assert(o.hasOwnProperty('z') === true);
+    assert(Object.getOwnPropertyNames(o).length === 1);
+
+    assert(delete o.z === true);
+    assert(o.hasOwnProperty('x') === false);
+    assert(o.hasOwnProperty('y') === false);
+    assert(o.hasOwnProperty('z') === false);
+    assert(Object.getOwnPropertyNames(o).length === 0);
+
+    a = [ 3, 5, 7 ];
+
+    assert(Object.getOwnPropertyNames(a).length === 4);
+
+    assert(delete a[0] === true);
+    assert(a.hasOwnProperty(0) === false);
+    assert(a.hasOwnProperty(1) === true);
+    assert(a.hasOwnProperty(2) === true);
+    assert(Object.getOwnPropertyNames(a).length === 3);
+
+    assert(delete a[1] === true);
+    assert(a.hasOwnProperty(0) === false);
+    assert(a.hasOwnProperty(1) === false);
+    assert(a.hasOwnProperty(2) === true);
+    assert(Object.getOwnPropertyNames(a).length === 2);
+
+    assert(delete a[2] === true);
+    assert(a.hasOwnProperty(0) === false);
+    assert(a.hasOwnProperty(1) === false);
+    assert(a.hasOwnProperty(2) === false);
+    assert(Object.getOwnPropertyNames(a).length === 1);
+
+    q = {};
+    Object.defineProperty(q, "foo", { value: 1, writable: false, enumerable: false });
+    assert(q.foo === 1);
+
+    assert(delete q.foo === false);
+    assert(q.hasOwnProperty('foo') === true);
+
+    console.log("PASS");
+} catch (e) {
+    console.log("FAIL: " + e);
+}

Libraries/LibJS/Tests/operators/delete-global-variable.js

@@ -0,0 +1,16 @@
+load("test-common.js");
+
+try {
+    a = 1;
+    assert(delete a === true);
+
+    assertThrowsError(() => {
+        a;
+    }, {
+        error: ReferenceError
+    });
+
+    console.log("PASS");
+} catch (e) {
+    console.log("FAIL: " + e);
+}

Libraries/LibJS/Tests/operators/delete-globalThis-property-crash.js

@@ -0,0 +1,10 @@
+load("test-common.js");
+
+try {
+    a = 1;
+    assert(delete globalThis.a === true);
+    a = 2;
+    console.log("PASS");
+} catch (e) {
+    console.log("FAIL: " + e);
+}

Libraries/LibJS/Tests/operators/in-operator-basic.js

@@ -0,0 +1,35 @@
+load("test-common.js");
+
+try {
+    ["foo", 123, null, undefined].forEach(value => {
+        assertThrowsError(() => {
+            "prop" in value;
+        }, {
+            error: TypeError,
+            message: "'in' operator must be used on an object"
+        });
+    });
+
+    var o = {foo: "bar", bar: undefined};
+    assert("" in o === false);
+    assert("foo" in o === true);
+    assert("bar" in o === true);
+    assert("baz" in o === false);
+    assert("toString" in o === true);
+
+    var a = ["hello", "friends"];
+    assert(0 in a === true);
+    assert(1 in a === true);
+    assert(2 in a === false);
+    assert("0" in a === true);
+    assert("hello" in a === false);
+    assert("friends" in a === false);
+    assert("length" in a === true);
+
+    var s = new String("foo");
+    assert("length" in s);
+
+    console.log("PASS");
+} catch (e) {
+    console.log("FAIL: " + e);
+}

Libraries/LibJS/Tests/operators/instanceof-basic.js

@@ -0,0 +1,28 @@
+load("test-common.js");
+
+try {
+    function Foo() {
+        this.x = 123;
+    }
+
+    var foo = new Foo();
+    assert(foo instanceof Foo);
+
+    function Base() {
+        this.is_base = true;
+    }
+
+    function Derived() {
+        this.is_derived = true;
+    }
+
+    Object.setPrototypeOf(Derived.prototype, Base.prototype);
+
+    var d = new Derived();
+    assert(d instanceof Derived);
+    assert(d instanceof Base);
+
+    console.log("PASS");
+} catch(e) {
+    console.log("FAIL: " + e);
+}

Libraries/LibJS/Tests/operators/logical-expressions-basic.js

@@ -0,0 +1,118 @@
+load("test-common.js");
+
+try {
+    assert((true && true) === true);
+    assert((false && false) === false);
+    assert((true && false) === false);
+    assert((false && true) === false);
+    assert((false && (1 === 2)) === false);
+    assert((true && (1 === 2)) === false);
+    assert(("" && "") === "");
+    assert(("" && false) === "");
+    assert(("" && true) === "");
+    assert((false && "") === false);
+    assert((true && "") === "");
+    assert(("foo" && "bar") === "bar");
+    assert(("foo" && false) === false);
+    assert(("foo" && true) === true);
+    assert((false && "bar") === false);
+    assert((true && "bar") === "bar");
+    assert((0 && false) === 0);
+    assert((0 && true) === 0);
+    assert((42 && false) === false);
+    assert((42 && true) === true);
+    assert((false && 0) === false);
+    assert((true && 0) === 0);
+    assert((false && 42) === false);
+    assert((true && 42) === 42);
+    assert(([] && false) === false);
+    assert(([] && true) === true);
+    assert((false && []) === false);
+    assert((true && []).length === 0);
+    assert((null && false) === null);
+    assert((null && true) === null);
+    assert((false && null) === false);
+    assert((true && null) === null);
+    assert((undefined && false) === undefined);
+    assert((undefined && true) === undefined);
+    assert((false && undefined) === false);
+    assert((true && undefined) === undefined);
+
+    assert((true || true) === true);
+    assert((false || false) === false);
+    assert((true || false) === true);
+    assert((false || true) === true);
+    assert((false || (1 === 2)) === false);
+    assert((true || (1 === 2)) === true);
+    assert(("" || "") === "");
+    assert(("" || false) === false);
+    assert(("" || true) === true);
+    assert((false || "") === "");
+    assert((true || "") === true);
+    assert(("foo" || "bar") === "foo");
+    assert(("foo" || false) === "foo");
+    assert(("foo" || true) === "foo");
+    assert((false || "bar") === "bar");
+    assert((true || "bar") === true);
+    assert((0 || false) === false);
+    assert((0 || true) === true);
+    assert((42 || false) === 42);
+    assert((42 || true) === 42);
+    assert((false || 0) === 0);
+    assert((true || 0) === true);
+    assert((false || 42) === 42);
+    assert((true || 42) === true);
+    assert(([] || false).length === 0);
+    assert(([] || true).length === 0);
+    assert((false || []).length === 0);
+    assert((true || []) === true);
+    assert((null || false) === false);
+    assert((null || true) === true);
+    assert((false || null) === null);
+    assert((true || null) === true);
+    assert((undefined || false) === false);
+    assert((undefined || true) === true);
+    assert((false || undefined) === undefined);
+    assert((true || undefined) === true);
+
+    assert((true ?? true) === true);
+    assert((false ?? false) === false);
+    assert((true ?? false) === true);
+    assert((false ?? true) === false);
+    assert((false ?? (1 === 2)) === false);
+    assert((true ?? (1 === 2)) === true);
+    assert(("" ?? "") === "");
+    assert(("" ?? false) === "");
+    assert(("" ?? true) === "");
+    assert((false ?? "") === false);
+    assert((true ?? "") === true);
+    assert(("foo" ?? "bar") === "foo");
+    assert(("foo" ?? false) === "foo");
+    assert(("foo" ?? true) === "foo");
+    assert((false ?? "bar") === false);
+    assert((true ?? "bar") === true);
+    assert((0 ?? false) === 0);
+    assert((0 ?? true) === 0);
+    assert((42 ?? false) === 42);
+    assert((42 ?? true) === 42);
+    assert((false ?? 0) === false);
+    assert((true ?? 0) === true);
+    assert((false ?? 42) === false);
+    assert((true ?? 42) === true);
+    assert(([] ?? false).length === 0);
+    assert(([] ?? true).length === 0);
+    assert((false ?? []) === false);
+    assert((true ?? []) === true);
+    assert((null ?? false) === false);
+    assert((null ?? true) === true);
+    assert((false ?? null) === false);
+    assert((true ?? null) === true);
+    assert((undefined ?? false) === false);
+    assert((undefined ?? true) === true);
+    assert((false ?? undefined) === false);
+    assert((true ?? undefined) === true);
+
+    console.log("PASS");
+} catch (e) {
+    console.log("FAIL: " + e);
+}

Libraries/LibJS/Tests/operators/logical-expressions-short-circuit.js

@@ -0,0 +1,15 @@
+load("test-common.js");
+
+try {
+    let foo = 1;
+    false && (foo = 2);
+    assert(foo === 1);
+
+    foo = 1;
+    true || (foo = 2);
+    assert(foo === 1);
+
+    console.log("PASS");
+} catch (e) {
+    console.log("FAIL: " + e);
+}

Libraries/LibJS/Tests/operators/modulo-basic.js

@@ -0,0 +1,22 @@
+load("test-common.js");
+
+try {
+    assert(10 % 3 === 1);
+    assert(10.5 % 2.5 === 0.5);
+    assert(-0.99 % 0.99 === -0);
+
+    // Examples from MDN:
+    // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Arithmetic_Operators
+    assert(12 % 5 === 2);
+    assert(-1 % 2 === -1);
+    assert(1 % -2 === 1);
+    assert(isNaN(NaN % 2));
+    assert(1 % 2 === 1);
+    assert(2 % 3 === 2);
+    assert(-4 % 2 === -0);
+    assert(5.5 % 2 === 1.5);
+
+    console.log("PASS");
+} catch (e) {
+    console.log("FAIL: " + e);
+}

Libraries/LibJS/Tests/operators/ternary-basic.js

@@ -0,0 +1,21 @@
+load("test-common.js");
+
+try {
+    var x = 1;
+
+    assert(x === 1 ? true : false);
+    assert((x ? x : 0) === x);
+    assert(1 < 2 ? (true) : (false));
+    assert((0 ? 1 : 1 ? 10 : 20) === 10);
+    assert((0 ? 1 ? 1 : 10 : 20) === 20);
+
+    var o = {};
+    o.f = true;
+    assert(o.f ? true : false);
+
+    assert(1 ? o.f : null);
+
+    console.log("PASS");
+} catch (e) {
+    console.log("FAIL: " + e);
+}

Libraries/LibJS/Tests/operators/typeof-basic.js

@@ -0,0 +1,27 @@
+load("test-common.js");
+
+try {
+    assert(typeof "foo" === "string");
+    assert(!(typeof "foo" !== "string"));
+    assert(typeof (1 + 2) === "number");
+    assert(typeof {} === "object");
+    assert(typeof null === "object");
+    assert(typeof undefined === "undefined");
+
+    var iExist = 1;
+    assert(typeof iExist === "number");
+    assert(typeof iDontExist === "undefined");
+
+    var calls = 0;
+    Object.defineProperty(globalThis, "foo", {
+        get() {
+            calls++;
+        },
+    });
+    assert(typeof foo === "undefined");
+    assert(calls === 1);
+
+    console.log("PASS");
+} catch (e) {
+    console.log("FAIL: " + e);
+}

Libraries/LibJS/Tests/operators/void-basic.js

@@ -0,0 +1,20 @@
+load("test-common.js");
+
+try {
+    assert(void "" === undefined);
+    assert(void "foo" === undefined);
+    assert(void 1 === undefined);
+    assert(void 42 === undefined);
+    assert(void true === undefined);
+    assert(void false === undefined);
+    assert(void null === undefined);
+    assert(void undefined === undefined);
+    assert(void function () {} === undefined);
+    assert(void (() => {}) === undefined);
+    assert(void (() => "hello friends")() === undefined);
+    assert((() => void "hello friends")() === undefined);
+
+    console.log("PASS");
+} catch (e) {
+    console.log("FAIL: " + e);
+}