1 files changed, 50 insertions, 0 deletions
diff --git a/src/test/java/org/yaml/snakeyaml/emitter/EmptyStringOutputTest.java b/src/test/java/org/yaml/snakeyaml/emitter/EmptyStringOutputTest.java
new file mode 100644
index 00000000..97788741
--- /dev/null
+++ b/src/test/java/org/yaml/snakeyaml/emitter/EmptyStringOutputTest.java
@@ -0,0 +1,50 @@
+/**
+ * Copyright (c) 2008, SnakeYAML
+ *
+ * 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 org.yaml.snakeyaml.emitter;
+
+import java.io.IOException;
+import java.io.StringWriter;
+import junit.framework.TestCase;
+import org.yaml.snakeyaml.DumperOptions;
+import org.yaml.snakeyaml.events.DocumentStartEvent;
+import org.yaml.snakeyaml.events.ImplicitTuple;
+import org.yaml.snakeyaml.events.ScalarEvent;
+import org.yaml.snakeyaml.events.StreamStartEvent;
+
+/**
+ * https://bitbucket.org/snakeyaml/snakeyaml-engine/issues/23/emitting-only-an-empty-string-adds-to
+ */
+public class EmptyStringOutputTest extends TestCase {
+
+  public void testOutputEmptyStringWithEmitter() throws IOException {
+    assertEquals("The empty output must contain ---", "---", dump(""));
+  }
+
+  public void testOutputStringWithEmitter() throws IOException {
+    assertEquals("The non-empty output must NOT contain ---", "v1234512345", dump("v1234512345"));
+  }
+
+  private String dump(String value) throws IOException {
+    DumperOptions options = new DumperOptions();
+    StringWriter output = new StringWriter();
+    Emitter emitter = new Emitter(output, options);
+    emitter.emit(new StreamStartEvent(null, null));
+    emitter.emit(new DocumentStartEvent(null, null, false, null, null));
+    emitter.emit(new ScalarEvent(null, null, new ImplicitTuple(true, false), value, null, null,
+        DumperOptions.ScalarStyle.PLAIN));
+    return output.toString();
+  }
+}
+
+