Switch analysis_server to use 'package:test'.

pkg/analysis_server/test/services/completion/dart/uri_contributor_test.dart

Index: pkg/analysis_server/test/services/completion/dart/uri_contributor_test.dart
diff --git a/pkg/analysis_server/test/services/completion/dart/uri_contributor_test.dart b/pkg/analysis_server/test/services/completion/dart/uri_contributor_test.dart
index 99cfd293109fadb250e4954a850b9347635043e3..61637d9e2713634c3f7829c0f290db84857e01e0 100644
--- a/pkg/analysis_server/test/services/completion/dart/uri_contributor_test.dart
+++ b/pkg/analysis_server/test/services/completion/dart/uri_contributor_test.dart
@@ -9,16 +9,18 @@ import 'package:analysis_server/src/provisional/completion/dart/completion_dart.
 import 'package:analysis_server/src/services/completion/dart/uri_contributor.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:path/path.dart';
+import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
-import 'package:unittest/unittest.dart';
 
 import '../../../utils.dart';
 import 'completion_contributor_util.dart';
 
 main() {
   initializeTestEnvironment();
-  defineReflectiveTests(UriContributorTest);
-  defineReflectiveTests(UriContributorWindowsTest);
+  defineReflectiveSuite(() {
+    defineReflectiveTests(UriContributorTest);
+    defineReflectiveTests(UriContributorWindowsTest);
+  });
 }
 
 @reflectiveTest
@@ -267,26 +269,26 @@ class UriContributorTest extends DartCompletionContributorTest {
         csKind: CompletionSuggestionKind.IMPORT);
   }
 
-  test_import_package2_with_trailing() async {
+  test_import_package2_raw() async {
     addPackageSource('foo', 'foo.dart', 'library foo;');
     addPackageSource('foo', 'baz/too.dart', 'library too;');
     addPackageSource('bar', 'bar.dart', 'library bar;');
-    addTestSource('import "package:foo/baz/^.dart" import');
+    addTestSource('import r"package:foo/baz/^" import');
     await computeSuggestions();
     assertSuggest('package:foo/baz/too.dart',
         csKind: CompletionSuggestionKind.IMPORT);
-    expect(replacementOffset, completionOffset - 16);
-    expect(replacementLength, 5 + 16);
   }
 
-  test_import_package2_raw() async {
+  test_import_package2_with_trailing() async {
     addPackageSource('foo', 'foo.dart', 'library foo;');
     addPackageSource('foo', 'baz/too.dart', 'library too;');
     addPackageSource('bar', 'bar.dart', 'library bar;');
-    addTestSource('import r"package:foo/baz/^" import');
+    addTestSource('import "package:foo/baz/^.dart" import');
     await computeSuggestions();
     assertSuggest('package:foo/baz/too.dart',
         csKind: CompletionSuggestionKind.IMPORT);
+    expect(replacementOffset, completionOffset - 16);
+    expect(replacementLength, 5 + 16);
   }
 
   test_import_package_missing_lib() async {