LibJS: Add tests for bitwise & and ^

And fix some edge case conversion bugs found by the tests.

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

@@ -0,0 +1,60 @@
+test("basic numeric xor", () => {
+    expect(0 ^ 0).toBe(0);
+    expect(0 ^ 1).toBe(1);
+    expect(0 ^ 2).toBe(2);
+    expect(0 ^ 3).toBe(3);
+    expect(0 ^ 4).toBe(4);
+    expect(0 ^ 5).toBe(5);
+
+    expect(1 ^ 0).toBe(1);
+    expect(1 ^ 1).toBe(0);
+    expect(1 ^ 2).toBe(3);
+    expect(1 ^ 3).toBe(2);
+    expect(1 ^ 4).toBe(5);
+    expect(1 ^ 5).toBe(4);
+
+    expect(2 ^ 0).toBe(2);
+    expect(2 ^ 1).toBe(3);
+    expect(2 ^ 2).toBe(0);
+    expect(2 ^ 3).toBe(1);
+    expect(2 ^ 4).toBe(6);
+    expect(2 ^ 5).toBe(7);
+
+    expect(3 ^ 0).toBe(3);
+    expect(3 ^ 1).toBe(2);
+    expect(3 ^ 2).toBe(1);
+    expect(3 ^ 3).toBe(0);
+    expect(3 ^ 4).toBe(7);
+    expect(3 ^ 5).toBe(6);
+
+    expect(4 ^ 0).toBe(4);
+    expect(4 ^ 1).toBe(5);
+    expect(4 ^ 2).toBe(6);
+    expect(4 ^ 3).toBe(7);
+    expect(4 ^ 4).toBe(0);
+    expect(4 ^ 5).toBe(1);
+
+    expect(5 ^ 0).toBe(5);
+    expect(5 ^ 1).toBe(4);
+    expect(5 ^ 2).toBe(7);
+    expect(5 ^ 3).toBe(6);
+    expect(5 ^ 4).toBe(1);
+    expect(5 ^ 5).toBe(0);
+});
+
+test("xor with non-numeric values", () => {
+    let x = 3;
+    let y = 7;
+
+    expect("42" ^ 6).toBe(44);
+    expect(x ^ y).toBe(4);
+    expect(x ^ [[[[12]]]]).toBe(15);
+    expect(undefined ^ y).toBe(7);
+    expect("a" ^ "b").toBe(0);
+    expect(null ^ null).toBe(0);
+    expect(undefined ^ undefined).toBe(0);
+    expect(NaN ^ NaN).toBe(0);
+    expect(NaN ^ 6).toBe(6);
+    expect(Infinity ^ Infinity).toBe(0);
+    expect(-Infinity ^ Infinity).toBe(0);
+});