Initial commit of Dart transformer to generate constructor stubs, see https://github.com/angular/an…

modules/angular2/test/transform/transform_test.dart

+library angular2.test;
+
+import 'dart:io';
+import 'package:barback/barback.dart';
+import 'package:angular2/transformer.dart';
+import 'package:code_transformers/tests.dart';
+import 'package:dart_style/dart_style.dart';
+import 'package:unittest/unittest.dart';
+import 'package:unittest/vm_config.dart';
+
+import 'common.dart';
+
+main() {
+  useVMConfiguration();
+
+  // TODO(kegluneq): Add a test for generating multiple annotations.
+
+  group('Annotation tests:', _runTests);
+}
+
+var formatter = new DartFormatter();
+var transform = new AngularTransformer(new TransformerOptions(
+    'web/index.dart', 'web/index.bootstrap.dart', 'web/index.html'));
+
+class TestConfig {

[jakemac, 2015/02/18 16:18:50]

Personally I kind of like just inlining these files, and it makes the tests run
faster. I don't feel that strongly though.

[tjblasi, 2015/02/18 21:18:25]

I'm pretty ambivalent, but Misko strongly preferred having them separated out. 

+  final String name;
+  final Map<String, String> assetPathToInputPath;
+  final Map<String, String> assetPathToExpectedOutputPath;
+
+  TestConfig(this.name,
+      {Map<String, String> inputs, Map<String, String> outputs})
+      : this.assetPathToInputPath = inputs,
+        this.assetPathToExpectedOutputPath = outputs;
+}
+
+void _runTests() {
+  // Each test has its own directory for inputs & an `expected` directory for
+  // expected outputs.
+  var tests = [
+    new TestConfig('Html entry point',
+        inputs: {
+      'a|web/index.html': 'common.html',
+      'a|web/index.dart': 'html_entry_point_files/index.dart',
+      'angular2|lib/src/core/annotations/annotations.dart': 'common.dart'
+    },
+        outputs: {
+      'a|web/index.html': 'html_entry_point_files/expected/index.html'
+    }),
+    new TestConfig('Simple',
+        inputs: {
+      'a|web/index.html': 'common.html',
+      'a|web/index.dart': 'simple_annotation_files/index.dart',
+      'a|web/bar.dart': 'simple_annotation_files/bar.dart',
+      'angular2|lib/src/core/annotations/annotations.dart': 'common.dart'
+    },
+        outputs: {
+      'a|web/index.bootstrap.dart':
+          'simple_annotation_files/expected/index.bootstrap.dart'
+    }),
+    new TestConfig('Two injected dependencies',
+        inputs: {
+      'a|web/index.html': 'common.html',
+      'a|web/index.dart': 'two_deps_files/index.dart',
+      'a|web/foo.dart': 'two_deps_files/foo.dart',
+      'a|web/bar.dart': 'two_deps_files/bar.dart',
+      'angular2|lib/src/core/annotations/annotations.dart': 'common.dart'
+    },
+        outputs: {
+      'a|web/index.bootstrap.dart':
+          'two_deps_files/expected/index.bootstrap.dart'
+    }),
+    new TestConfig('List of types',
+        inputs: {
+      'a|web/index.html': 'common.html',
+      'a|web/index.dart': 'list_of_types_files/index.dart',
+      'a|web/foo.dart': 'list_of_types_files/foo.dart',
+      'a|web/bar.dart': 'list_of_types_files/bar.dart',
+      'angular2|lib/src/core/annotations/annotations.dart': 'common.dart'
+    },
+        outputs: {
+      'a|web/index.bootstrap.dart':
+          'list_of_types_files/expected/index.bootstrap.dart'
+    }),
+    new TestConfig('Component ctor with default value',
+        inputs: {
+      'a|web/index.html': 'common.html',
+      'a|web/index.dart': 'ctor_with_default_value_files/index.dart',
+      'a|web/bar.dart': 'ctor_with_default_value_files/bar.dart',
+      'angular2|lib/src/core/annotations/annotations.dart': 'common.dart'
+    },
+        outputs: {
+      'a|web/index.bootstrap.dart':
+          'ctor_with_default_value_files/expected/index.bootstrap.dart'
+    }),
+    new TestConfig('Component with synthetic Constructor',
+        inputs: {
+      'a|web/index.html': 'common.html',
+      'a|web/index.dart': 'synthetic_ctor_files/index.dart',
+      'a|web/bar.dart': 'synthetic_ctor_files/bar.dart',
+      'angular2|lib/src/core/annotations/annotations.dart': 'common.dart'
+    },
+        outputs: {
+      'a|web/index.bootstrap.dart':
+          'synthetic_ctor_files/expected/index.bootstrap.dart'
+    })
+  ];
+
+  var cache = {};
+
+  for (var config in tests) {
+    // Read in input & output files.
+    config.assetPathToInputPath.forEach((key, value) {
+      config.assetPathToInputPath[key] =
+          cache.putIfAbsent(value, () => new File(value).readAsStringSync());
+    });
+    config.assetPathToExpectedOutputPath.forEach((key, value) {
+      config.assetPathToExpectedOutputPath[key] = cache.putIfAbsent(value, () {
+        var code = new File(value).readAsStringSync();
+        return value.endsWith('dart') ? formatter.format(code) : code;
+      });
+    });
+    testPhases(config.name, [
+      [transform]
+    ], config.assetPathToInputPath, config.assetPathToExpectedOutputPath, []);
+  }
+}