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6.1 kB · 215 lines
TypeScript
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216import { expect } from "@std/expect";import { beforeEach, describe, test } from "@std/testing/bdd";import type { z } from "zod";
import type { monitorRegionSchema } from "../src/schema/constants";import { updateRegion } from "./region-migration";
// Import the types we need
describe("updateRegion", () => { let regions: z.infer<typeof monitorRegionSchema>[];
beforeEach(() => { // Reset regions array before each test regions = ["ams", "hkg", "fra", "lax"]; });
describe("when old region exists in array", () => { test("should replace old region with 'sin' when new region does not exist in array", () => { updateRegion("hkg", "sin", regions);
expect(regions).toEqual(["ams", "sin", "fra", "lax"]); expect(regions).toHaveLength(4); });
test("should remove old region when new region already exists in array", () => { updateRegion("hkg", "ams", regions);
expect(regions).toEqual(["ams", "fra", "lax"]); expect(regions).toHaveLength(3); });
test("should handle replacing first element", () => { updateRegion("ams", "sin", regions);
expect(regions).toEqual(["sin", "hkg", "fra", "lax"]); });
test("should handle replacing last element", () => { updateRegion("lax", "sin", regions);
expect(regions).toEqual(["ams", "hkg", "fra", "sin"]); });
test("should handle case where old and new region are the same", () => { updateRegion("hkg", "hkg", regions);
// Since hkg exists, it should be removed (newRegionIndex !== -1) expect(regions).toEqual(["ams", "fra", "lax"]); expect(regions).toHaveLength(3); }); });
describe("when old region does not exist in array", () => { test("should not modify the array when old region is not found", () => { const originalRegions = [...regions]; updateRegion("sin", "syd", regions);
expect(regions).toEqual(originalRegions); expect(regions).toHaveLength(4); }); });
describe("edge cases", () => { test("should handle empty regions array", () => { const emptyRegions: z.infer<typeof monitorRegionSchema>[] = []; updateRegion("hkg", "sin", emptyRegions);
expect(emptyRegions).toEqual([]); expect(emptyRegions).toHaveLength(0); });
test("should handle single element array - replace scenario", () => { const singleRegion: z.infer<typeof monitorRegionSchema>[] = ["hkg"]; updateRegion("hkg", "sin", singleRegion);
expect(singleRegion).toEqual(["sin"]); });
test("should handle single element array - remove scenario", () => { const singleRegion: z.infer<typeof monitorRegionSchema>[] = ["hkg"]; updateRegion("hkg", "hkg", singleRegion);
expect(singleRegion).toEqual([]); });
test("should handle array with duplicate regions", () => { const duplicateRegions: z.infer<typeof monitorRegionSchema>[] = [ "ams", "hkg", "ams", "fra", ]; updateRegion("hkg", "sin", duplicateRegions);
// Should only replace the first occurrence of hkg expect(duplicateRegions).toEqual(["ams", "sin", "ams", "fra"]); });
test("should handle multiple occurrences of old region", () => { const multipleOldRegions: z.infer<typeof monitorRegionSchema>[] = [ "hkg", "ams", "hkg", "fra", ]; updateRegion("hkg", "sin", multipleOldRegions);
// Should only replace the first occurrence expect(multipleOldRegions).toEqual(["sin", "ams", "hkg", "fra"]); });
describe("function mutates original array", () => { test("should modify the original regions array reference", () => { const originalReference = regions; updateRegion("hkg", "sin", regions);
// Should be the same reference (mutated) expect(regions).toBe(originalReference); expect(regions).toEqual(["ams", "sin", "fra", "lax"]); }); });
describe("full migrations", () => { test("should modify the original regions array reference", () => { const newRegions = [ "ams", "arn", "atl", "bog", "bom", "bos", "cdg", "den", "dfw", "ewr", "eze", "fra", "gdl", "gig", "gru", "hkg", "iad", "jnb", "lax", "lhr", "mad", "mia", "nrt", "ord", "otp", "phx", "qro", "sin", "scl", "sjc", "sea", "sin", "syd", "waw", "yul", "yyz", ] as z.infer<typeof monitorRegionSchema>[]; // Asia Pacific updateRegion("hkg", "sin", newRegions);
// North America updateRegion("atl", "dfw", newRegions); updateRegion("mia", "dfw", newRegions); updateRegion("gdl", "dfw", newRegions); updateRegion("qro", "dfw", newRegions); updateRegion("bos", "ewr", newRegions); updateRegion("phx", "lax", newRegions); updateRegion("sea", "sjc", newRegions); updateRegion("yul", "yyz", newRegions);
// Europe updateRegion("waw", "ams", newRegions); updateRegion("mad", "cdg", newRegions); updateRegion("otp", "fra", newRegions);
// South America updateRegion("bog", "gru", newRegions); updateRegion("gig", "gru", newRegions); updateRegion("scl", "gru", newRegions); updateRegion("eze", "gru", newRegions);
// Should be the same reference (mutated)
expect(newRegions).toEqual([ "ams", "arn", "bom", "cdg", "den", "dfw", "ewr", "fra", "gru", "iad", "jnb", "lax", "lhr", "nrt", "ord", "sin", "sjc", "sin", "syd", "yyz", ]); }); }); });});