test: move to e2e test as flatRoutesUniversal wants only route files

Signed-off-by: Logan McAnsh <logan@mcan.sh>

integration/flat-routes-test.ts

@@ -270,3 +270,45 @@ test.describe("emits warnings for route conflicts", async () => {
     expect(buildOutput).toContain(`⚠️ Route Path Collision: "/"`);
   });
 });
+
+test.describe("", () => {
+  let buildStdio = new PassThrough();
+  let buildOutput: string;
+
+  let originalConsoleLog = console.log;
+  let originalConsoleWarn = console.warn;
+  let originalConsoleError = console.error;
+
+  test.beforeAll(async () => {
+    console.log = () => {};
+    console.warn = () => {};
+    console.error = () => {};
+    await createFixtureProject({
+      buildStdio,
+      future: { v2_routeConvention: true },
+      files: {
+        "app/routes/_index/route.jsx": js``,
+        "app/routes/_index/utils.js": js``,
+      },
+    });
+
+    let chunks: Buffer[] = [];
+    buildOutput = await new Promise<string>((resolve, reject) => {
+      buildStdio.on("data", (chunk) => chunks.push(Buffer.from(chunk)));
+      buildStdio.on("error", (err) => reject(err));
+      buildStdio.on("end", () =>
+        resolve(Buffer.concat(chunks).toString("utf8"))
+      );
+    });
+  });
+
+  test.afterAll(() => {
+    console.log = originalConsoleLog;
+    console.warn = originalConsoleWarn;
+    console.error = originalConsoleError;
+  });
+
+  test("doesn't emit a warning for nested index files with co-located files", () => {
+    expect(buildOutput).not.toContain(`Route Path Collision`);
+  });
+});

packages/remix-dev/__tests__/flat-routes-test.ts

@@ -671,23 +671,6 @@ describe("flatRoutes", () => {
       );
     });
 
-    test("nested index files", () => {
-      let testFiles = [
-        path.join("routes", "_index", "index.tsx"),
-        path.join("routes", "_index", "utils.ts"),
-      ];
-
-      // route manifest uses the full path
-      let fullPaths = testFiles.map((file) => path.join(APP_DIR, file));
-
-      let routeManifest = flatRoutesUniversal(APP_DIR, fullPaths);
-
-      let routes = Object.values(routeManifest);
-
-      expect(routes).toHaveLength(1);
-      expect(consoleError).not.toHaveBeenCalled();
-    });
-
     test("folder/route.tsx matching folder.tsx", () => {
       let testFiles = [
         path.join("routes", "dashboard", "route.tsx"),