Issue 24612. Skip excluded folder during contexts creation.

pkg/analysis_server/test/context_manager_test.dart

Index: pkg/analysis_server/test/context_manager_test.dart
diff --git a/pkg/analysis_server/test/context_manager_test.dart b/pkg/analysis_server/test/context_manager_test.dart
index ba768ce84c44c95a2c0445ae32040ea349800d1b..75997ca6ea6bd0dd5f62e76b70ae09c06eee8009 100644
--- a/pkg/analysis_server/test/context_manager_test.dart
+++ b/pkg/analysis_server/test/context_manager_test.dart
@@ -937,6 +937,19 @@ test_pack:lib/
     _checkPackageMap(projPath, equals(packageMapProvider.packageMap));
   }
 
+  void test_setRoots_noContext_excludedFolder() {
+    // prepare paths
+    String project = '/project';
+    String excludedFolder = '$project/excluded';
+    String excludedPubspec = '$excludedFolder/pubspec.yaml';
+    // create files
+    resourceProvider.newFile(excludedPubspec, 'name: ignore-me');
+    // set "/project", and exclude "/project/excluded"
+    manager.setRoots(
+        <String>[project], <String>[excludedFolder], <String, String>{});
+    callbacks.assertContextPaths([project]);
+  }
+
   void test_setRoots_noContext_inDotFolder() {
     String pubspecPath = posix.join(projPath, '.pub', 'pubspec.yaml');
     resourceProvider.newFile(pubspecPath, 'name: test');