53 lines
1.6 KiB
JavaScript
53 lines
1.6 KiB
JavaScript
test("constructor properties", () => {
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expect(Array).toHaveLength(1);
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expect(Array.name).toBe("Array");
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expect(Array.prototype.length).toBe(0);
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});
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describe("errors", () => {
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test("invalid array length", () => {
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[-1, -100, -0.1, 0.1, 1.23, Infinity, -Infinity, NaN].forEach(value => {
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expect(() => {
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new Array(value);
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}).toThrowWithMessage(RangeError, "Invalid array length");
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});
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});
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});
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describe("normal behavior", () => {
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test("typeof", () => {
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expect(typeof Array()).toBe("object");
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expect(typeof new Array()).toBe("object");
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});
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test("constructor with single numeric argument", () => {
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var a = new Array(5);
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expect(a instanceof Array).toBeTrue();
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expect(a).toHaveLength(5);
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});
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test("constructor with single non-numeric argument", () => {
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var a = new Array("5");
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expect(a instanceof Array).toBeTrue();
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expect(a).toHaveLength(1);
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expect(a[0]).toBe("5");
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});
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test("constructor with multiple numeric arguments", () => {
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var a = new Array(1, 2, 3);
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expect(a instanceof Array).toBeTrue();
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expect(a).toHaveLength(3);
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expect(a[0]).toBe(1);
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expect(a[1]).toBe(2);
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expect(a[2]).toBe(3);
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});
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test("constructor with single array argument", () => {
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var a = new Array([1, 2, 3]);
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expect(a instanceof Array).toBeTrue();
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expect(a).toHaveLength(1);
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expect(a[0][0]).toBe(1);
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expect(a[0][1]).toBe(2);
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expect(a[0][2]).toBe(3);
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});
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});
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