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ElementAtOrDefault.ts
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ElementAtOrDefault.ts
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import { asAsync, expectAsync, itAsync, itEnumerable, itParallel } from "../TestHelpers"
describe("elementAtOrDefault", () => {
it("String", () => {
expect("0".elementAtOrDefault(0)).toBe("0")
expect("".elementAtOrDefault(0)).toBeNull()
expect("abc".elementAtOrDefault(0)).toBe("a")
expect("abc".elementAtOrDefault(1)).toBe("b")
expect("abc".elementAtOrDefault(2)).toBe("c")
expect("abc".elementAtOrDefault(3)).toBeNull()
})
itEnumerable("WithElements", (asEnumerable) => {
expect(asEnumerable([1]).elementAtOrDefault(0)).toBe(1)
expect(asEnumerable([1, 2]).elementAtOrDefault(1)).toBe(2)
})
itAsync("WithElements", async () => {
expect(await asAsync([1]).elementAtOrDefault(0)).toBe(1)
expect(await asAsync([1, 2]).elementAtOrDefault(1)).toBe(2)
})
itParallel("WithElements", async (asParallel) => {
expect(await asParallel([1]).elementAtOrDefault(0)).toBe(1)
expect(await asParallel([1, 2]).elementAtOrDefault(1)).toBe(2)
})
itEnumerable("Starting with Zero", (asEnumerable) => {
expect(asEnumerable([0]).elementAtOrDefault(0)).toBe(0)
expect(asEnumerable([0, 2]).elementAtOrDefault(1)).toBe(2)
})
itAsync("Starting with Zero", async () => {
expect(await asAsync([0]).elementAtOrDefault(0)).toBe(0)
expect(await asAsync([0, 2]).elementAtOrDefault(1)).toBe(2)
})
itParallel("Starting with Zero", async (asParallel) => {
expect(await asParallel([0]).elementAtOrDefault(0)).toBe(0)
expect(await asParallel([0, 2]).elementAtOrDefault(1)).toBe(2)
})
itEnumerable("Empty to be null", (asEnumerable) =>
expect(asEnumerable([]).elementAtOrDefault(0)).toBeNull())
itAsync("Empty to be null", async () => {
const expect = await expectAsync(asAsync([]).elementAtOrDefault(0))
expect.toBeNull()
})
itParallel("Empty to be null", async (asParallel) => {
const expect = await expectAsync(asParallel([]).elementAtOrDefault(0))
expect.toBeNull()
})
})