Issue #24 Backfill tests for Hooks/useWindow

Issue #24 - Add useWindow tests

jest.config.js

@@ -9,6 +9,10 @@ module.exports = {
     modulePathIgnorePatterns: ["<rootDir>/dist"],
     preset: "ts-jest",
     roots: ["<rootDir>/src"],
-    setupFilesAfterEnv: ["<rootDir>/src/setupTests.ts"],
+    setupFilesAfterEnv: [
+        "<rootDir>/src/setupTests.ts",
+        // polyfill window.resizeTo
+        "window-resizeto/polyfill",
+    ],
     testEnvironment: "jsdom",
 };

package.json

@@ -24,6 +24,7 @@
     "devDependencies": {
         "@testing-library/jest-dom": "5.5.0",
         "@testing-library/react": "10.0.4",
+        "@testing-library/react-hooks": "3.4.2",
         "@types/faker": "4.1.12",
         "@types/jest": "25.1.5",
         "@types/node": "13.11.0",
@@ -35,14 +36,16 @@
         "jest-extended": "0.11.5",
         "jest-fetch-mock": "3.0.3",
         "prettier": "1.19.1",
+        "react-test-renderer": "16.9.0",
         "rimraf": "2.6.2",
         "rosie": "2.0.1",
         "ts-jest": "25.5.1",
         "tslint": "6.1.2",
         "tslint-config-prettier": "1.18.0",
         "typedoc": "0.17.6",
         "typedoc-plugin-markdown": "2.2.17",
-        "typescript": "3.8.3"
+        "typescript": "3.8.3",
+        "window-resizeto": "0.0.2"
     },
     "files": [
         "dist"

src/hooks/use-window.test.tsx

@@ -1,3 +1,34 @@
+import { renderHook } from "@testing-library/react-hooks";
+import { useWindow } from "./use-window";
+
+const DEFAULT_WIDTH: number = 1024;
+const DEFAULT_HEIGHT: number = 768;
+
 describe("useWindow", () => {
-    test.skip("TODO - https://github.com/AndcultureCode/AndcultureCode.JavaScript.React/issues/24", () => {});
+    beforeEach(() => {
+        window.resizeTo(DEFAULT_WIDTH, DEFAULT_HEIGHT);
+    });
+
+    test("returns width and height of window", async () => {
+        // Arrange & Act
+        const { result } = renderHook(() => useWindow());
+
+        // Assert
+        expect(result.current.width).toBe(DEFAULT_WIDTH);
+        expect(result.current.height).toBe(DEFAULT_HEIGHT);
+    });
+
+    test("when window resize event is triggered, returns new width and height of window", async () => {
+        // Arrange
+        const { result } = renderHook(() => useWindow());
+        const windowWidth = DEFAULT_WIDTH + 1;
+        const windowHeight = DEFAULT_HEIGHT + 1;
+
+        // Act
+        window.resizeTo(windowWidth, windowHeight);
+
+        // Assert
+        expect(result.current.width).toBe(windowWidth);
+        expect(result.current.height).toBe(windowHeight);
+    });
 });