1 files changed, 75 insertions, 0 deletions
diff --git a/src/java_tools/singlejar/javatests/com/google/devtools/build/singlejar/ConcatenateStrategyTest.java b/src/java_tools/singlejar/javatests/com/google/devtools/build/singlejar/ConcatenateStrategyTest.java
new file mode 100644
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--- /dev/null
+++ b/src/java_tools/singlejar/javatests/com/google/devtools/build/singlejar/ConcatenateStrategyTest.java
@@ -0,0 +1,75 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// 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.google.devtools.build.singlejar;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+
+/**
+ * Unit tests for {@link ConcatenateStrategy}.
+ */
+@RunWith(JUnit4.class)
+public class ConcatenateStrategyTest {
+
+  private String merge(String... inputs) throws IOException {
+    return mergeInternal(true, inputs);
+  }
+
+  private String mergeNoNewLine(String... inputs) throws IOException {
+    return mergeInternal(false, inputs);
+  }
+
+  private String mergeInternal(boolean appendNewLine, String... inputs) throws IOException {
+    ByteArrayOutputStream out = new ByteArrayOutputStream();
+    ConcatenateStrategy strategy = new ConcatenateStrategy(appendNewLine);
+    for (String input : inputs) {
+      strategy.merge(new ByteArrayInputStream(input.getBytes(UTF_8)), out);
+    }
+    strategy.finish(out);
+    return new String(out.toByteArray(), UTF_8);
+  }
+
+  @Test
+  public void testSingleInput() throws IOException {
+    assertEquals("a", merge("a"));
+    assertEquals("a", mergeNoNewLine("a"));
+  }
+
+  @Test
+  public void testTwoInputs() throws IOException {
+    assertEquals("a\nb", merge("a\n", "b"));
+    assertEquals("a\nb", mergeNoNewLine("a\n", "b"));
+  }
+
+  @Test
+  public void testAutomaticNewline() throws IOException {
+    assertEquals("a\nb", merge("a", "b"));
+    assertEquals("ab", mergeNoNewLine("a", "b"));
+  }
+
+  @Test
+  public void testAutomaticNewlineAndEmptyFile() throws IOException {
+    assertEquals("a\nb", merge("a", "", "b"));
+    assertEquals("ab", mergeNoNewLine("a", "", "b"));
+  }
+}