1 files changed, 60 insertions, 0 deletions
diff --git a/jack-tests/src/com/android/jack/test/comparator/ComparatorDiff.java b/jack-tests/src/com/android/jack/test/comparator/ComparatorDiff.java
new file mode 100644
index 0000000..9c44470
--- /dev/null
+++ b/jack-tests/src/com/android/jack/test/comparator/ComparatorDiff.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.jack.test.comparator;
+
+import com.android.jack.DifferenceFoundException;
+import com.android.jack.test.util.ExecFileException;
+import com.android.jack.test.util.ExecuteFile;
+
+import java.io.File;
+import java.io.IOException;
+
+import javax.annotation.Nonnull;
+
+/**
+ * This {@link Comparator} uses the {@code diff} shell command to compare 2 files.
+ */
+public class ComparatorDiff extends ComparatorFile {
+
+  public ComparatorDiff(@Nonnull File candidate, @Nonnull File reference) {
+    super(candidate, reference);
+  }
+
+  @Override
+  public void compare() throws DifferenceFoundException, ComparatorException {
+    try {
+      ExecuteFile ef = new ExecuteFile(
+          "diff " + candidate.getAbsolutePath() + " " + reference.getAbsolutePath());
+      ef.setOut(System.out);
+      ef.setErr(System.err);
+
+      int exitStatus = ef.run();
+      switch (exitStatus) {
+        case 0:
+          break;
+        case 1:
+          throw new DifferenceFoundException();
+        default:
+          throw new ComparatorException("Exit status: " + exitStatus);
+      }
+    } catch (ExecFileException e) {
+      throw new ComparatorException(e);
+    } catch (IOException e) {
+      throw new ComparatorException(e);
+    }
+  }
+}