add a class to read and parse libraries.dart file

compiler/javatests/com/google/dart/compiler/SystemLibrariesReaderTest.java

Index: compiler/javatests/com/google/dart/compiler/SystemLibrariesReaderTest.java
===================================================================
--- compiler/javatests/com/google/dart/compiler/SystemLibrariesReaderTest.java	(revision 0)
+++ compiler/javatests/com/google/dart/compiler/SystemLibrariesReaderTest.java	(revision 0)
@@ -0,0 +1,65 @@
+// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
+// 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.
+package com.google.dart.compiler;
+
+import com.google.dart.compiler.SystemLibrariesReader.DartLibrary;
+
+import junit.framework.TestCase;
+
+import java.io.File;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.util.Map;
+import java.util.Map.Entry;
+
+/**
+ * Test the {@link SystemLibrariesReader}
+ */
+public class SystemLibrariesReaderTest extends TestCase {
+
+  
+  public void testLibrariesFileExists(){
+    File sdkLibPath = new File(PackageLibraryManager.DEFAULT_SDK_PATH, "lib");
+    File librariesFile = new File(new File(sdkLibPath, SystemLibrariesReader.INTERNAL_DIR), SystemLibrariesReader.LIBRARIES_FILE);
+    assertTrue(librariesFile.exists());
+  }
+  
+  public void testLibrariesFileContent() throws URISyntaxException{
+    File sdkLibPath = new File(PackageLibraryManager.DEFAULT_SDK_PATH, "lib");
+    URI base = sdkLibPath.toURI();
+    SystemLibrariesReader reader = new SystemLibrariesReader(sdkLibPath);
+    Map<String, DartLibrary> librariesMap = reader.getLibrariesMap();
+    assertTrue(!librariesMap.isEmpty());
+    for (Entry<String, DartLibrary> entry : librariesMap.entrySet()) {
+      String path = entry.getValue().getPath(); 
+      File file = new File(base.resolve(new URI(null, null, path, null, null)).normalize());
+      assertTrue(file.exists());
+   }
+   
+    // check content
+    //   "coreimpl": const LibraryInfo(
+    //       "coreimpl/coreimpl_runtime.dart",
+    //       implementation: true,
+    //       dart2jsPath: "compiler/implementation/lib/coreimpl.dart",
+    //       dart2jsPatchPath: "compiler/implementation/lib/coreimpl_patch.dart")
+    DartLibrary library = librariesMap.get("dart:coreimpl");
+    assertTrue(library != null);
+    assertEquals("dart:coreimpl",library.getShortName());
+    assertTrue(library.isImplementation());
+    assertEquals("Shared", library.getCategory());
+   
+    //   "builtin": const LibraryInfo(
+    //       "builtin/builtin_runtime.dart",
+    //       category: "Server",
+    //       platforms: VM_PLATFORM),
+    library = librariesMap.get("dart:builtin");
+    assertTrue(library != null);
+    assertEquals("dart:builtin",library.getShortName());
+    assertFalse(library.isImplementation());
+    assertTrue(library.isVmLibrary());
+    assertEquals("Server", library.getCategory());
+   
+  }
+  
+}