test(rsc-mf): add shared manifest fallback helper coverage

Author: cursoragent

tests/integration/rsc-mf/tests/manifestFallback.test.ts

@@ -0,0 +1,172 @@
+import {
+  type RemoteManifestShape,
+  createManifestFallbackAssetUrl,
+  getRequestedAssetDirectory,
+  isExposeAssetRequestPath,
+  resolveManifestFallbackAssetPath,
+} from '../shared/manifestFallback';
+
+describe('manifest fallback shared helpers', () => {
+  it('identifies expose asset request paths', () => {
+    expect(
+      isExposeAssetRequestPath(
+        '/static/js/async/__federation_expose_RemoteClientCounter.js',
+      ),
+    ).toBe(true);
+    expect(
+      isExposeAssetRequestPath(
+        '/static/css/async/__federation_expose_RemoteClientCounter.css',
+      ),
+    ).toBe(true);
+    expect(isExposeAssetRequestPath('/static/js/async/743.32436c1247.js')).toBe(
+      false,
+    );
+  });
+
+  it('derives requested async asset directory from pathname', () => {
+    expect(
+      getRequestedAssetDirectory(
+        '/static/js/async/__federation_expose_RemoteClientCounter.js',
+      ),
+    ).toBe('static/js/async/');
+    expect(
+      getRequestedAssetDirectory(
+        '/static/css/async/__federation_expose_RemoteClientCounter.css',
+      ),
+    ).toBe('static/css/async/');
+  });
+
+  it('resolves fallback assets from shared and exposes manifest entries', () => {
+    const manifest: RemoteManifestShape = {
+      shared: [
+        {
+          assets: {
+            js: {
+              sync: [
+                'static/js/async/__federation_expose_actions.44d8f1d7ae.js',
+              ],
+              async: [],
+            },
+            css: {
+              sync: [],
+              async: [],
+            },
+          },
+        },
+      ],
+      exposes: [
+        {
+          assets: {
+            js: {
+              sync: [
+                'static/js/async/__federation_expose_RemoteClientCounter.7745fe5f0a.js',
+              ],
+              async: [],
+            },
+            css: {
+              sync: [],
+              async: [],
+            },
+          },
+        },
+      ],
+    };
+
+    expect(
+      resolveManifestFallbackAssetPath(
+        '/static/js/async/__federation_expose_RemoteClientCounter.js',
+        manifest,
+      ),
+    ).toBe(
+      'static/js/async/__federation_expose_RemoteClientCounter.7745fe5f0a.js',
+    );
+    expect(
+      resolveManifestFallbackAssetPath(
+        '/static/js/async/__federation_expose_actions.js',
+        manifest,
+      ),
+    ).toBe('static/js/async/__federation_expose_actions.44d8f1d7ae.js');
+  });
+
+  it('supports absolute manifest assets and rejects non-matching paths', () => {
+    const manifest: RemoteManifestShape = {
+      shared: [
+        {
+          assets: {
+            js: {
+              sync: [
+                'http://127.0.0.1:3999/static/js/async/__federation_expose_nestedActions.a8ce95b11a.js',
+              ],
+              async: [],
+            },
+            css: {
+              sync: [],
+              async: [],
+            },
+          },
+        },
+      ],
+    };
+
+    expect(
+      resolveManifestFallbackAssetPath(
+        '/static/js/async/__federation_expose_nestedActions.js',
+        manifest,
+      ),
+    ).toBe(
+      'http://127.0.0.1:3999/static/js/async/__federation_expose_nestedActions.a8ce95b11a.js',
+    );
+    expect(
+      resolveManifestFallbackAssetPath(
+        '/static/js/async/not-an-expose.js',
+        manifest,
+      ),
+    ).toBeUndefined();
+  });
+
+  it('builds safe fallback URL and merges request query params', () => {
+    expect(
+      createManifestFallbackAssetUrl({
+        remoteOrigin: 'http://127.0.0.1:3999',
+        fallbackAssetPath:
+          'http://127.0.0.1:3999/static/js/async/__federation_expose_RemoteClientCounter.7745fe5f0a.js?manifest=1',
+        requestSearch: '?cache=1',
+        requestedAssetDirectory: 'static/js/async/',
+      }),
+    ).toBe(
+      'http://127.0.0.1:3999/static/js/async/__federation_expose_RemoteClientCounter.7745fe5f0a.js?manifest=1&cache=1',
+    );
+  });
+
+  it('rejects unsafe fallback URLs', () => {
+    expect(
+      createManifestFallbackAssetUrl({
+        remoteOrigin: 'http://127.0.0.1:3999',
+        fallbackAssetPath:
+          'https://cdn.example.com/static/js/async/__federation_expose_RemoteClientCounter.7745fe5f0a.js',
+        requestSearch: '',
+        requestedAssetDirectory: 'static/js/async/',
+      }),
+    ).toBeUndefined();
+    expect(
+      createManifestFallbackAssetUrl({
+        remoteOrigin: 'http://127.0.0.1:3999',
+        fallbackAssetPath:
+          'static/js/async/../__federation_expose_RemoteClientCounter.7745fe5f0a.js',
+        requestSearch: '',
+        requestedAssetDirectory: 'static/js/async/',
+      }),
+    ).toBeUndefined();
+    expect(
+      createManifestFallbackAssetUrl({
+        remoteOrigin: 'http://127.0.0.1:3999',
+        fallbackAssetPath:
+          'static/js/async/__federation_expose_RemoteClientCounter.js',
+        requestSearch: '',
+        requestedAssetDirectory: 'static/js/async/',
+        requestUrl:
+          'http://127.0.0.1:3999/static/js/async/__federation_expose_RemoteClientCounter.js',
+      }),
+    ).toBeUndefined();
+  });
+});