Added polyfill for var (moved from web_ui)

pkg/csslib/test/var_test.dart

Index: pkg/csslib/test/var_test.dart
diff --git a/pkg/csslib/test/var_test.dart b/pkg/csslib/test/var_test.dart
index afdc570232281c50a367633c71b309523e1ac58f..11e94be3d5207a312b90399a1adfbb57760d4c07 100644
--- a/pkg/csslib/test/var_test.dart
+++ b/pkg/csslib/test/var_test.dart
@@ -623,6 +623,31 @@ var-color-foreground: #00f;
   expect(prettyPrint(stylesheet), generated2);
 }
 
+void polyfill() {
+  var errors = [];
+  var input = r'''
+@color-background: red;
+@color-foreground: blue;
+.test {
+  background-color: @color-background;
+  color: @color-foreground;
+}''';
+
+  var generated = r'''.test {
+  background-color: #f00;
+  color: #00f;
+}''';
+
+  var stylesheet = compileCss(input, errors: errors,
+      opts: ['--no-colors', 'memory'], polyfill: true);

[Siggi Cherem (dart-lang), 2013/09/09 19:53:38]

should we also test the other features like var(a), calc, etc?

[terry, 2013/09/09 20:04:50]

Yes, I will however "@foo: red;" and "var-foo; red;" generate same AST as does
@foo or var(foo) in a property.  I will expand these test quite a bit when I
have dependencies working and I'll move over the full blown testing I did for
var in web_ui for these.

On 2013/09/09 19:53:38, Siggi Cherem (dart-lang) wrote:

+
+  expect(stylesheet != null, true);
+  expect(errors.isEmpty, true, reason: errors.toString());
+  expect(prettyPrint(stylesheet), generated);
+}
+
+
+
 main() {
   test('Simple var', simpleVar);
   test('Expressions var', expressionsVar);
@@ -631,4 +656,5 @@ main() {
   test('Var syntax', testVar);
   test('Cycles var', cyclesVar);
   test('Less syntax', testLess);
+  test('Polyfill', polyfill);
 }