1 files changed, 97 insertions, 0 deletions

diff --git a/src/test/java/org/yaml/snakeyaml/issues/issue544/DoubleQuoteTest.java b/src/test/java/org/yaml/snakeyaml/issues/issue544/DoubleQuoteTest.java
new file mode 100644
index 00000000..b9a756a1
--- /dev/null
+++ b/src/test/java/org/yaml/snakeyaml/issues/issue544/DoubleQuoteTest.java
@@ -0,0 +1,97 @@
+/**
+ * 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.issues.issue544;
+
+import static org.junit.Assert.assertEquals;
+
+import java.io.StringWriter;
+import java.util.ArrayList;
+import java.util.List;
+import org.junit.Test;
+import org.yaml.snakeyaml.DumperOptions;
+import org.yaml.snakeyaml.DumperOptions.FlowStyle;
+import org.yaml.snakeyaml.DumperOptions.ScalarStyle;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.nodes.MappingNode;
+import org.yaml.snakeyaml.nodes.NodeTuple;
+import org.yaml.snakeyaml.nodes.ScalarNode;
+import org.yaml.snakeyaml.nodes.Tag;
+
+public class DoubleQuoteTest {
+
+  private MappingNode create() {
+    String content = "🔐This process is simple and secure.";
+
+    ScalarNode doubleQuotedKey =
+        new ScalarNode(Tag.STR, "double_quoted", null, null, ScalarStyle.PLAIN);
+    ScalarNode doubleQuotedValue =
+        new ScalarNode(Tag.STR, content, null, null, ScalarStyle.DOUBLE_QUOTED);
+    NodeTuple doubleQuotedTuple = new NodeTuple(doubleQuotedKey, doubleQuotedValue);
+
+    ScalarNode singleQuotedKey =
+        new ScalarNode(Tag.STR, "single_quoted", null, null, ScalarStyle.PLAIN);
+    ScalarNode singleQuotedValue =
+        new ScalarNode(Tag.STR, content, null, null, ScalarStyle.SINGLE_QUOTED);
+    NodeTuple singleQuotedTuple = new NodeTuple(singleQuotedKey, singleQuotedValue);
+
+    List<NodeTuple> nodeTuples = new ArrayList<>();
+    nodeTuples.add(doubleQuotedTuple);
+    nodeTuples.add(singleQuotedTuple);
+
+    MappingNode mappingNode = new MappingNode(Tag.MAP, nodeTuples, FlowStyle.BLOCK);
+
+    return mappingNode;
+  }
+
+  private String emit(DumperOptions dumperOptions) {
+    Yaml yaml = new Yaml(dumperOptions);
+
+    StringWriter writer = new StringWriter();
+    yaml.serialize(create(), writer);
+
+    return writer.toString();
+  }
+
+  @Test
+  public void testUnicode() {
+    DumperOptions dumperOptions = new DumperOptions();
+    dumperOptions.setAllowUnicode(true); // use as is
+    String output = emit(dumperOptions);
+    String expectedOutput = "double_quoted: \"🔐This process is simple and secure.\"\n"
+        + "single_quoted: '🔐This process is simple and secure.'\n";
+
+    assertEquals(expectedOutput, output);
+  }
+
+  @Test
+  public void testSubstitution() {
+    DumperOptions dumperOptions = new DumperOptions();
+    dumperOptions.setAllowUnicode(false); // substitute with U notation
+    String output = emit(dumperOptions);
+    String expectedOutput = "double_quoted: \"\\U0001f510This process is simple and secure.\"\n"
+        + "single_quoted: \"\\U0001f510This process is simple and secure.\"\n";
+
+    assertEquals(expectedOutput, output);
+  }
+
+  @Test
+  public void testDefault() {
+    DumperOptions dumperOptions = new DumperOptions();
+    String output = emit(dumperOptions);
+    String expectedOutput = "double_quoted: \"🔐This process is simple and secure.\"\n"
+        + "single_quoted: '🔐This process is simple and secure.'\n";
+
+    assertEquals(expectedOutput, output);
+  }
+}