Simplify tests under utils/tests to follow StandardTestSuite convention.

utils/tests/css/expression_tests.dart

Index: utils/tests/css/expression_tests.dart
diff --git a/utils/tests/css/src/ExpressionTest.dart b/utils/tests/css/expression_tests.dart
similarity index 99%
rename from utils/tests/css/src/ExpressionTest.dart
rename to utils/tests/css/expression_tests.dart
index e439123b67bbac237c215c32085cbed757ddfec0..7ced968086c44b380753f927b371e610b22575fa 100644
--- a/utils/tests/css/src/ExpressionTest.dart
+++ b/utils/tests/css/expression_tests.dart
@@ -2,7 +2,7 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-#import("../../../css/css.dart");
+#import("../../css/css.dart");
 
 class ExpressionTest {
 
@@ -57,7 +57,7 @@ class ExpressionTest {
     Expect.equals(ruleset.declarationGroup.declarations.length, 0);
 
     simpleSeqs = ruleset.selectorGroup.selectors[0].simpleSelectorSequences;
-  
+
     var idx = 0;
     for (final selector in simpleSeqs) {
       final simpSelector = selector.simpleSelector;
@@ -98,7 +98,7 @@ class ExpressionTest {
 
     List<SimpleSelectorSequence> simpleSeqs =
         ruleset.selectorGroup.selectors[0].simpleSelectorSequences;
-  
+
     for (final selector in simpleSeqs) {
       final simpSelector = selector.simpleSelector;
       Expect.isTrue(simpSelector is IdSelector);
@@ -160,7 +160,7 @@ class ExpressionTest {
       } else {
         Expect.fail("unexpected expression");
       }
-  
+
       idx++;
     }
     Expect.equals(simpleSeqs.length, idx);
@@ -237,7 +237,7 @@ class ExpressionTest {
       } else {
         Expect.fail("unexpected expression");
       }
-  
+
       idx++;
     }
 
@@ -416,7 +416,7 @@ class ExpressionTest {
     Expect.equals(ruleset.declarationGroup.declarations.length, 0);
 
     simpleSeqs = ruleset.selectorGroup.selectors[0].simpleSelectorSequences;
-    
+
     Expect.equals(simpleSeqs.length, 2);
     var idx = 0;
     for (final selector in simpleSeqs) {
@@ -486,7 +486,7 @@ class ExpressionTest {
     Expect.equals(ruleset.declarationGroup.declarations.length, 0);
 
     simpleSeqs = ruleset.selectorGroup.selectors[0].simpleSelectorSequences;
-    
+
     Expect.equals(simpleSeqs.length, 2);
     idx = 0;
     for (final selector in simpleSeqs) {