[flutter_tools] allow configuring libraries spec path for the web compilation (#51590)

diff --git a/packages/flutter_tools/test/general.shard/resident_runner_test.dart b/packages/flutter_tools/test/general.shard/resident_runner_test.dart
index d570b08..a9993ce 100644
--- a/packages/flutter_tools/test/general.shard/resident_runner_test.dart
+++ b/packages/flutter_tools/test/general.shard/resident_runner_test.dart
@@ -688,6 +688,9 @@
       trackWidgetCreation: true,
     )).generator as DefaultResidentCompiler;
 
+    expect(residentCompiler.librariesSpec,
+      globals.fs.file(globals.artifacts.getArtifactPath(Artifact.flutterWebLibrariesJson))
+        .uri.toString());
     expect(residentCompiler.targetModel, TargetModel.dartdevc);
     expect(residentCompiler.sdkRoot,
       globals.artifacts.getArtifactPath(Artifact.flutterWebSdk, mode: BuildMode.debug) + '/');