1 files changed, 40 insertions, 0 deletions
diff --git a/src/test/java/org/yaml/snakeyaml/ExclamationTagTest.java b/src/test/java/org/yaml/snakeyaml/ExclamationTagTest.java
new file mode 100644
index 00000000..1a590bc9
--- /dev/null
+++ b/src/test/java/org/yaml/snakeyaml/ExclamationTagTest.java
@@ -0,0 +1,40 @@
+/**
+ * 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;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+/**
+ * The tag "!" must force the parser to use only the node kind (scalar, sequence, mapping) (issue
+ * 459)
+ */
+public class ExclamationTagTest {
+
+  @Test
+  public void testImplicitTag() {
+    Yaml yaml = new Yaml();
+    Object result = yaml.load("! 12");
+    assertEquals("It works the same way as PyYAML", 12, result);
+    // It might be changed -> assertEquals("12", yaml.load("! 12"));
+  }
+
+  @Test
+  public void testNoImplicitTag() {
+    Yaml yaml = new Yaml();
+    Object result = yaml.load("12");
+    assertEquals(12, result);
+  }
+}