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Diffstat (limited to '')
-rw-r--r-- | browser/components/newtab/test/unit/common/Dedupe.test.js | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/browser/components/newtab/test/unit/common/Dedupe.test.js b/browser/components/newtab/test/unit/common/Dedupe.test.js new file mode 100644 index 0000000000..1c85eafa50 --- /dev/null +++ b/browser/components/newtab/test/unit/common/Dedupe.test.js @@ -0,0 +1,38 @@ +import { Dedupe } from "common/Dedupe.sys.mjs"; + +describe("Dedupe", () => { + let instance; + beforeEach(() => { + instance = new Dedupe(); + }); + describe("group", () => { + it("should remove duplicates inside the groups", () => { + const beforeItems = [ + [1, 1, 1], + [2, 2, 2], + [3, 3, 3], + ]; + const afterItems = [[1], [2], [3]]; + assert.deepEqual(instance.group(...beforeItems), afterItems); + }); + it("should remove duplicates between groups, favouring earlier groups", () => { + const beforeItems = [ + [1, 2, 3], + [2, 3, 4], + [3, 4, 5], + ]; + const afterItems = [[1, 2, 3], [4], [5]]; + assert.deepEqual(instance.group(...beforeItems), afterItems); + }); + it("should remove duplicates from groups of objects", () => { + instance = new Dedupe(item => item.id); + const beforeItems = [ + [{ id: 1 }, { id: 1 }, { id: 2 }], + [{ id: 1 }, { id: 3 }, { id: 2 }], + [{ id: 1 }, { id: 2 }, { id: 5 }], + ]; + const afterItems = [[{ id: 1 }, { id: 2 }], [{ id: 3 }], [{ id: 5 }]]; + assert.deepEqual(instance.group(...beforeItems), afterItems); + }); + }); +}); |