Recompile unit with potential conflict/dependency on some top-level symbol.

compiler/javatests/com/google/dart/compiler/end2end/inc/MemoryLibrarySource.java

Index: compiler/javatests/com/google/dart/compiler/end2end/inc/MemoryLibrarySource.java
diff --git a/compiler/javatests/com/google/dart/compiler/end2end/inc/MemoryLibrarySource.java b/compiler/javatests/com/google/dart/compiler/end2end/inc/MemoryLibrarySource.java
new file mode 100644
index 0000000000000000000000000000000000000000..e0469f23fb13e3da88f1140ae7a0d0fda9b04776
--- /dev/null
+++ b/compiler/javatests/com/google/dart/compiler/end2end/inc/MemoryLibrarySource.java
@@ -0,0 +1,108 @@
+// Copyright (c) 2011, 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.end2end.inc;
+
+import com.google.common.collect.Maps;
+import com.google.dart.compiler.DartSource;
+import com.google.dart.compiler.LibrarySource;
+import com.google.dart.compiler.Source;
+import com.google.dart.compiler.UrlDartSource;
+
+import java.io.IOException;
+import java.io.Reader;
+import java.io.StringReader;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.util.Date;
+import java.util.Map;
+
+/**
+ * {@link LibrarySource} which provides content for all {@link Source}s from memory.
+ */
+public class MemoryLibrarySource implements LibrarySource {
+  private final String libName;
+  private final String libContent;
+  private final Map<String, String> sourceContentMap = Maps.newHashMap();
+  private final Map<String, Long> sourceLastModifiedMap = Maps.newHashMap();
+
+  public MemoryLibrarySource(String libName, String libContent) throws URISyntaxException {
+    this.libName = libName;
+    this.libContent = libContent;
+  }
+
+  @Override
+  public boolean exists() {
+    return true;
+  }
+
+  @Override
+  public String getName() {
+    return libName;
+  }
+
+  @Override
+  public URI getUri() {
+    return URI.create(libName);
+  }
+  
+  @Override
+  public long getLastModified() {
+    return 0;
+  }
+  
+  @Override
+  public Reader getSourceReader() throws IOException {
+    return new StringReader(libContent);
+  }
+
+  @Override
+  public LibrarySource getImportFor(String relPath) throws IOException {
+    // Not implemented for now, tests which use it don't work with imports.
+    return null;
+  }
+
+  @Override
+  public DartSource getSourceFor(final String relPath) {
+    final String content;
+    final Long sourceLastModified;
+    if (sourceContentMap.containsKey(relPath)) {
+      content = sourceContentMap.get(relPath);
+      sourceLastModified = sourceLastModifiedMap.get(relPath);
+    } else {
+      content = "";
+      sourceLastModified = Long.valueOf(0);
+    }
+    // Return fake UrlDateSource with in-memory content.
+    URI uri = URI.create(relPath);
+    return new UrlDartSource(uri, relPath, this) {
+      @Override
+      public String getName() {
+        return relPath;
+      }
+
+      @Override
+      public boolean exists() {
+        return true;
+      }
+
+      @Override
+      public long getLastModified() {
+        return sourceLastModified.longValue();
+      }
+
+      @Override
+      public Reader getSourceReader() throws IOException {
+        return new StringReader(content);
+      }
+    };
+  }
+
+  /**
+   * Sets the given content for the source.
+   */
+  public void setContent(String relPath, String content) {
+    sourceContentMap.put(relPath, content);
+    sourceLastModifiedMap.put(relPath, new Date().getTime());
+  }
+}