When analyzing a Bazel/Blaze workspace in which no build has been run, assume Bazel.

pkg/analyzer/test/generated/bazel_test.dart

Index: pkg/analyzer/test/generated/bazel_test.dart
diff --git a/pkg/analyzer/test/generated/bazel_test.dart b/pkg/analyzer/test/generated/bazel_test.dart
index cc1a75a405222ccb116d97a5816840477a6bfc87..a2290cdafecbdd045f68c6cef3fd14f9cc372a8d 100644
--- a/pkg/analyzer/test/generated/bazel_test.dart
+++ b/pkg/analyzer/test/generated/bazel_test.dart
@@ -570,10 +570,14 @@ class BazelWorkspaceTest extends _BaseTest {
   }
 
   void test_find_null_symlinkPrefix() {
+    String prefix = BazelWorkspace.defaultSymlinkPrefix;
     provider.newFile(_p('/workspace/WORKSPACE'), '');
     BazelWorkspace workspace =
         BazelWorkspace.find(provider, _p('/workspace/my/module'));
-    expect(workspace, isNull);
+    expect(workspace.root, _p('/workspace'));
+    expect(workspace.readonly, isNull);
+    expect(workspace.bin, _p('/workspace/$prefix-bin'));
+    expect(workspace.genfiles, _p('/workspace/$prefix-genfiles'));
   }
 
   void test_findFile_hasReadonlyFolder() {