Consolidate conjugation i18n strings (#11660)

test/utils/FormattingUtils-test.tsx

@@ -0,0 +1,103 @@
+/*
+Copyright 2023 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React from "react";
+
+import { formatList, formatCount, formatCountLong } from "../../src/utils/FormattingUtils";
+import SettingsStore from "../../src/settings/SettingsStore";
+
+jest.mock("../../src/dispatcher/dispatcher");
+
+describe("FormattingUtils", () => {
+    describe("formatCount", () => {
+        it.each([
+            { count: 999, expectedCount: "999" },
+            { count: 9999, expectedCount: "10K" },
+            { count: 99999, expectedCount: "100K" },
+            { count: 999999, expectedCount: "1M" },
+            { count: 9999999, expectedCount: "10M" },
+            { count: 99999999, expectedCount: "100M" },
+            { count: 999999999, expectedCount: "1B" },
+            { count: 9999999999, expectedCount: "10B" },
+        ])("formats $count as $expectedCount", ({ count, expectedCount }) => {
+            expect(formatCount(count)).toBe(expectedCount);
+        });
+    });
+
+    describe("formatCountLong", () => {
+        it("formats numbers according to the locale", () => {
+            expect(formatCountLong(1000)).toBe("1,000");
+        });
+    });
+
+    describe("formatList", () => {
+        beforeEach(() => {
+            jest.resetAllMocks();
+            jest.spyOn(SettingsStore, "getValue").mockReturnValue("en-GB");
+        });
+
+        it("should return empty string when given empty list", () => {
+            expect(formatList([])).toEqual("");
+        });
+
+        it("should return only item when given list of length 1", () => {
+            expect(formatList(["abc"])).toEqual("abc");
+        });
+
+        it("should return expected sentence in English without item limit", () => {
+            expect(formatList(["abc", "def", "ghi"])).toEqual("abc, def and ghi");
+        });
+
+        it("should return expected sentence in German without item limit", () => {
+            jest.spyOn(SettingsStore, "getValue").mockReturnValue("de");
+            expect(formatList(["abc", "def", "ghi"])).toEqual("abc, def und ghi");
+        });
+
+        it("should return expected sentence in English with item limit", () => {
+            expect(formatList(["abc", "def", "ghi", "jkl"], 2)).toEqual("abc, def and 2 others");
+            expect(formatList(["abc", "def", "ghi", "jkl"], 3)).toEqual("abc, def, ghi and one other");
+        });
+
+        it("should return expected sentence in English with item limit and includeCount", () => {
+            expect(formatList(["abc", "def", "ghi", "jkl"], 3, true)).toEqual("abc, def and 2 others");
+            expect(formatList(["abc", "def", "ghi", "jkl"], 4, true)).toEqual("abc, def, ghi and jkl");
+        });
+
+        it("should return expected sentence in ReactNode when given 2 React children", () => {
+            expect(formatList([<span key="a">a</span>, <span key="b">b</span>])).toMatchSnapshot();
+        });
+
+        it("should return expected sentence in ReactNode when given more React children", () => {
+            expect(
+                formatList([
+                    <span key="a">a</span>,
+                    <span key="b">b</span>,
+                    <span key="c">c</span>,
+                    <span key="d">d</span>,
+                ]),
+            ).toMatchSnapshot();
+        });
+
+        it("should return expected sentence in ReactNode when using itemLimit", () => {
+            expect(
+                formatList(
+                    [<span key="a">a</span>, <span key="b">b</span>, <span key="c">c</span>, <span key="d">d</span>],
+                    2,
+                ),
+            ).toMatchSnapshot();
+        });
+    });
+});