test: cut low-value tests, rewrite the rest around behavior, parallelize lanes (#285)

src/renderer/utils/platform.test.ts

@@ -0,0 +1,92 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+
+import { resolvePlatformInfo, type PlatformInfo } from './platform.js';
+
+// Installs fake `window` and `navigator` globals for the duration of `run`, then restores them.
+function withGlobals(globals: { window: unknown; navigator: unknown }, run: () => void): void {
+  const previousWindow = (globalThis as { window?: unknown }).window;
+  const previousNavigator = (globalThis as { navigator?: unknown }).navigator;
+  Object.defineProperty(globalThis, 'window', { configurable: true, value: globals.window });
+  Object.defineProperty(globalThis, 'navigator', { configurable: true, value: globals.navigator });
+  try {
+    run();
+  } finally {
+    Object.defineProperty(globalThis, 'window', { configurable: true, value: previousWindow });
+    Object.defineProperty(globalThis, 'navigator', {
+      configurable: true,
+      value: previousNavigator,
+    });
+  }
+}
+
+const MAC = { platform: 'MacIntel', userAgent: 'Mozilla/5.0 (Macintosh)' };
+const WINDOWS = { platform: 'Win32', userAgent: 'Mozilla/5.0 (Windows NT 10.0; Win64; x64)' };
+
+const MAC_VISIBLE: PlatformInfo = {
+  overlayLayer: 'visible',
+  isModalLayer: false,
+  isLinuxPlatform: false,
+  isMacOSPlatform: true,
+  isWindowsPlatform: false,
+  shouldToggleMouseIgnore: true,
+};
+
+const cases: Array<{
+  name: string;
+  search: string;
+  preloadLayer: string;
+  navigator: { platform: string; userAgent: string };
+  expected: PlatformInfo;
+}> = [
+  {
+    name: 'prefers query layer over preload layer',
+    search: '?layer=visible',
+    preloadLayer: 'modal',
+    navigator: MAC,
+    expected: MAC_VISIBLE,
+  },
+  {
+    name: 'ignores legacy secondary layer and falls back to visible',
+    search: '',
+    preloadLayer: 'secondary',
+    navigator: MAC,
+    expected: MAC_VISIBLE,
+  },
+  {
+    name: 'supports modal layer and disables mouse-ignore toggles',
+    search: '',
+    preloadLayer: 'modal',
+    navigator: MAC,
+    expected: {
+      ...MAC_VISIBLE,
+      overlayLayer: 'modal',
+      isModalLayer: true,
+      shouldToggleMouseIgnore: false,
+    },
+  },
+  {
+    name: 'flags Windows platforms',
+    search: '',
+    preloadLayer: 'visible',
+    navigator: WINDOWS,
+    expected: { ...MAC_VISIBLE, isMacOSPlatform: false, isWindowsPlatform: true },
+  },
+];
+
+for (const c of cases) {
+  test(`resolvePlatformInfo ${c.name}`, () => {
+    withGlobals(
+      {
+        window: {
+          electronAPI: { getOverlayLayer: () => c.preloadLayer },
+          location: { search: c.search },
+        },
+        navigator: c.navigator,
+      },
+      () => {
+        assert.deepEqual(resolvePlatformInfo(), c.expected);
+      },
+    );
+  });
+}