Libraries: Move to Userland/Libraries/

Userland/Libraries/LibJS/Tests/builtins/BigInt/BigInt.js

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+describe("correct behavior", () => {
+    test("basic functionality", () => {
+        expect(BigInt).toHaveLength(1);
+        expect(BigInt.name).toBe("BigInt");
+    });
+
+    test("constructor with numbers", () => {
+        expect(BigInt(0)).toBe(0n);
+        expect(BigInt(1)).toBe(1n);
+        expect(BigInt(+1)).toBe(1n);
+        expect(BigInt(-1)).toBe(-1n);
+        expect(BigInt(123n)).toBe(123n);
+    });
+
+    test("constructor with strings", () => {
+        expect(BigInt("")).toBe(0n);
+        expect(BigInt("0")).toBe(0n);
+        expect(BigInt("1")).toBe(1n);
+        expect(BigInt("+1")).toBe(1n);
+        expect(BigInt("-1")).toBe(-1n);
+        expect(BigInt("-1")).toBe(-1n);
+        expect(BigInt("42")).toBe(42n);
+        expect(BigInt("  \n  00100  \n  ")).toBe(100n);
+        expect(BigInt("3323214327642987348732109829832143298746432437532197321")).toBe(
+            3323214327642987348732109829832143298746432437532197321n
+        );
+    });
+
+    test("constructor with objects", () => {
+        expect(BigInt([])).toBe(0n);
+    });
+});
+
+describe("errors", () => {
+    test('cannot be constructed with "new"', () => {
+        expect(() => {
+            new BigInt();
+        }).toThrowWithMessage(TypeError, "BigInt is not a constructor");
+    });
+
+    test("invalid arguments", () => {
+        expect(() => {
+            BigInt(null);
+        }).toThrowWithMessage(TypeError, "Cannot convert null to BigInt");
+
+        expect(() => {
+            BigInt(undefined);
+        }).toThrowWithMessage(TypeError, "Cannot convert undefined to BigInt");
+
+        expect(() => {
+            BigInt(Symbol());
+        }).toThrowWithMessage(TypeError, "Cannot convert symbol to BigInt");
+
+        ["foo", "123n", "1+1", {}, function () {}].forEach(value => {
+            expect(() => {
+                BigInt(value);
+            }).toThrowWithMessage(SyntaxError, `Invalid value for BigInt: ${value}`);
+        });
+    });
+
+    test("invalid numeric arguments", () => {
+        [1.23, Infinity, -Infinity, NaN].forEach(value => {
+            expect(() => {
+                BigInt(value);
+            }).toThrowWithMessage(RangeError, "BigInt argument must be an integer");
+        });
+    });
+});

Userland/Libraries/LibJS/Tests/builtins/BigInt/BigInt.prototype.@@toStringTag.js

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+test("basic functionality", () => {
+    expect(BigInt.prototype[Symbol.toStringTag]).toBe("BigInt");
+});

Userland/Libraries/LibJS/Tests/builtins/BigInt/BigInt.prototype.toLocaleString.js

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+test("basic functionality", () => {
+    expect(BigInt.prototype.toLocaleString).toHaveLength(0);
+    expect(BigInt(123).toLocaleString()).toBe("123");
+});
+
+test("calling with non-BigInt |this|", () => {
+    expect(() => {
+        BigInt.prototype.toLocaleString.call("foo");
+    }).toThrowWithMessage(TypeError, "Not a BigInt object");
+});

Userland/Libraries/LibJS/Tests/builtins/BigInt/BigInt.prototype.toString.js

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+test("basic functionality", () => {
+    expect(BigInt.prototype.toString).toHaveLength(0);
+    expect(BigInt(123).toString()).toBe("123");
+});
+
+test("calling with non-BigInt |this|", () => {
+    expect(() => {
+        BigInt.prototype.toString.call("foo");
+    }).toThrowWithMessage(TypeError, "Not a BigInt object");
+});

Userland/Libraries/LibJS/Tests/builtins/BigInt/BigInt.prototype.valueOf.js

@@ -0,0 +1,12 @@
+test("basic functionality", () => {
+    expect(BigInt.prototype.valueOf).toHaveLength(0);
+    expect(typeof BigInt(123).valueOf()).toBe("bigint");
+    // FIXME: Uncomment once we support Object() with argument
+    // expect(typeof Object(123n).valueOf()).toBe("bigint");
+});
+
+test("calling with non-BigInt |this|", () => {
+    expect(() => {
+        BigInt.prototype.valueOf.call("foo");
+    }).toThrowWithMessage(TypeError, "Not a BigInt object");
+});

Userland/Libraries/LibJS/Tests/builtins/BigInt/bigint-basic.js

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+describe("correct behavior", () => {
+    test("typeof bigint", () => {
+        expect(typeof 1n).toBe("bigint");
+    });
+
+    test("bigint string coercion", () => {
+        expect("" + 123n).toBe("123");
+    });
+
+    test("arithmetic operators", () => {
+        let bigint = 123n;
+        expect(-bigint).toBe(-123n);
+
+        expect(12n + 34n).toBe(46n);
+        expect(12n - 34n).toBe(-22n);
+        expect(8n * 12n).toBe(96n);
+        expect(123n / 10n).toBe(12n);
+        expect(2n ** 3n).toBe(8n);
+        expect(5n % 3n).toBe(2n);
+        expect(
+            45977665298704210987n +
+                (714320987142450987412098743217984576n / 4598741987421098765327980n) * 987498743n
+        ).toBe(199365500239020623962n);
+    });
+
+    test("bitwise operators", () => {
+        expect(12n & 5n).toBe(4n);
+        expect(1n | 2n).toBe(3n);
+        expect(5n ^ 3n).toBe(6n);
+        expect(~1n).toBe(-2n);
+    });
+
+    test("increment operators", () => {
+        let bigint = 1n;
+        expect(bigint++).toBe(1n);
+        expect(bigint).toBe(2n);
+        expect(bigint--).toBe(2n);
+        expect(bigint).toBe(1n);
+        expect(++bigint).toBe(2n);
+        expect(bigint).toBe(2n);
+        expect(--bigint).toBe(1n);
+        expect(bigint).toBe(1n);
+    });
+
+    test("weak equality operators", () => {
+        expect(1n == 1n).toBeTrue();
+        expect(1n == 1).toBeTrue();
+        expect(1 == 1n).toBeTrue();
+        expect(1n == 1.23).toBeFalse();
+        expect(1.23 == 1n).toBeFalse();
+
+        expect(1n != 1n).toBeFalse();
+        expect(1n != 1).toBeFalse();
+        expect(1 != 1n).toBeFalse();
+        expect(1n != 1.23).toBeTrue();
+        expect(1.23 != 1n).toBeTrue();
+    });
+
+    test("strong equality operators", () => {
+        expect(1n === 1n).toBeTrue();
+        expect(1n === 1).toBeFalse();
+        expect(1 === 1n).toBeFalse();
+        expect(1n === 1.23).toBeFalse();
+        expect(1.23 === 1n).toBeFalse();
+
+        expect(1n !== 1n).toBeFalse();
+        expect(1n !== 1).toBeTrue();
+        expect(1 !== 1n).toBeTrue();
+        expect(1n !== 1.23).toBeTrue();
+        expect(1.23 !== 1n).toBeTrue();
+    });
+});
+
+describe("errors", () => {
+    test("conversion to number", () => {
+        expect(() => {
+            +123n;
+        }).toThrowWithMessage(TypeError, "Cannot convert BigInt to number");
+    });
+});

Userland/Libraries/LibJS/Tests/builtins/BigInt/bigint-minus.js

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+describe("minus behavior", () => {
+    test("the basics", () => {
+        expect(3n - 4n).toBe(-1n);
+        expect(3n - -4n).toBe(7n);
+        expect(-3n - -4n).toBe(-1n);
+        expect(-3n - 4n).toBe(-7n);
+    });
+});

Userland/Libraries/LibJS/Tests/builtins/BigInt/bigint-number-mix-errors.js

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+const doTest = (operatorName, executeOperation) => {
+    [1, null, undefined].forEach(value => {
+        const messageSuffix = operatorName === "unsigned right-shift" ? "" : " and other type";
+
+        expect(() => {
+            executeOperation(1n, value);
+        }).toThrowWithMessage(
+            TypeError,
+            `Cannot use ${operatorName} operator with BigInt${messageSuffix}`
+        );
+    });
+};
+
+[
+    ["addition", (a, b) => a + b],
+    ["subtraction", (a, b) => a - b],
+    ["multiplication", (a, b) => a * b],
+    ["division", (a, b) => a / b],
+    ["modulo", (a, b) => a % b],
+    ["exponentiation", (a, b) => a ** b],
+    ["bitwise OR", (a, b) => a | b],
+    ["bitwise AND", (a, b) => a & b],
+    ["bitwise XOR", (a, b) => a ^ b],
+    ["left-shift", (a, b) => a << b],
+    ["right-shift", (a, b) => a >> b],
+    ["unsigned right-shift", (a, b) => a >>> b],
+].forEach(testCase => {
+    test(`using ${testCase[0]} operator with BigInt and other type`, () => {
+        doTest(testCase[0], testCase[1]);
+    });
+});