Merge pull request #519 from lkoe/master

#518 Testcase for Spring property reference notation in scalar values

src/test/java/com/amihaiemil/eoyaml/RtYamlInputTest.java

@@ -937,6 +937,42 @@ public void supportsBracketedNotation() throws IOException {
         MatcherAssert.assertThat(pretty, Matchers.equalTo(fileContents));
     }
 
+    /**
+     * Do a round-trip test on sample file containing a scalar using Spring property reference syntax.
+     *
+     * <a href="https://github.com/decorators-squad/eo-yaml/issues/518">#518</a>
+     * based on
+     * <a href="https://github.com/decorators-squad/eo-yaml/issues/515">PR</a>
+     *
+     * @throws IOException When there's a problem reading the sample files.
+     */
+    @Test
+    public void supportsSpringPropertyRef() throws IOException {
+        final String filename = "issue_518_spring_property_ref.yml";
+        final String fileContents = readTestResource(filename).trim();
+
+        final YamlMapping read = new RtYamlInput(
+                new FileInputStream("src/test/resources/" + filename)
+        ).readYamlMapping();
+
+        MatcherAssert.assertThat(read.type(), Matchers.equalTo(Node.MAPPING));
+        MatcherAssert.assertThat(
+                read.asMapping().keys().size(),
+                Matchers.equalTo(1));
+
+        final YamlNode topLevelMapping = read.asMapping().value("a_mapping");
+        MatcherAssert.assertThat(
+                topLevelMapping.type(),
+                Matchers.equalTo(Node.MAPPING));
+        MatcherAssert.assertThat(
+                topLevelMapping.asMapping().keys().size(),
+                Matchers.equalTo(1));
+
+        final String pretty = read.toString().trim();
+
+        MatcherAssert.assertThat(pretty, Matchers.equalTo(fileContents));
+    }
+
     /**
      * Read a test resource file's contents.
      * @param fileName File to read.

src/test/resources/issue_518_spring_property_ref.yml

@@ -0,0 +1,2 @@
+a_mapping:
+  a_scalar: "${ENV_PROP:theDefault}"