d5c9a3dae8
* Require trailing commas * Add trailing commas * Add trailing commas in testUtils dir * Add trailing commas
55 lines
1.4 KiB
TypeScript
55 lines
1.4 KiB
TypeScript
import { arrayDiff } from "./arrays";
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const fruits = ["apple", "orange", "strawberry"];
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const vegetables = ["potato", "onion"];
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describe("Validate diff results", () => {
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it("Empty arrays", () => {
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const diff = arrayDiff([], []);
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expect(diff).toStrictEqual({ added: [], removed: [], common: [] });
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});
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it("Compare array with itself", () => {
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const diff = arrayDiff(fruits, fruits);
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expect(diff).toStrictEqual({ added: [], removed: [], common: fruits });
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});
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it("Added elements to empty", () => {
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const diff = arrayDiff([], vegetables);
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expect(diff).toStrictEqual({
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added: vegetables,
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removed: [],
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common: [],
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});
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});
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it("Added elements to populated array", () => {
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const diff = arrayDiff(fruits, [...fruits, ...vegetables]);
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expect(diff).toStrictEqual({
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added: vegetables,
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removed: [],
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common: fruits,
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});
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});
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it("Removed elements", () => {
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const diff = arrayDiff([...fruits, ...vegetables], fruits);
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expect(diff).toStrictEqual({
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added: [],
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removed: vegetables,
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common: fruits,
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});
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});
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it("Added, removed, and common elements", () => {
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const before = ["a", "b", "c", "d"];
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const after = ["b", "e", "a", "t"];
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const diff = arrayDiff(before, after);
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expect(diff).toStrictEqual({
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added: ["e", "t"],
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removed: ["c", "d"],
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common: ["a", "b"],
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});
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});
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});
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