add tests for optional single value json

src/test/java/com/suse/saltstack/netapi/parser/JsonParserTest.java

@@ -28,6 +28,7 @@
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
 
 /**
  * Json parser unit tests.
@@ -216,7 +217,7 @@ public void testOptionalParser() {
         assertFalse(result.nullString.isPresent());
         assertFalse(result.absentString.isPresent());
         result.valueString.ifPresent((value) ->
-                assertEquals("string with value", value)
+                        assertEquals("string with value", value)
         );
         List<Optional<Integer>> expected = new LinkedList<>();
         expected.add(Optional.of(1));
@@ -227,6 +228,19 @@ public void testOptionalParser() {
         assertEquals(expected, result.maybeInts);
     }
 
+
+    @Test
+    public void testOptionalSingleValue() {
+        JsonParser<Optional<Integer>> parser = new JsonParser<>(new TypeToken<Optional<Integer>>(){});
+        InputStream nullValue = this.getClass()
+                .getResourceAsStream("/single_null_value.json");
+        assertFalse(parser.parse(nullValue).isPresent());
+
+        InputStream intValue = this.getClass()
+                .getResourceAsStream("/single_int_value.json");
+        assertEquals(new Integer(123), parser.parse(intValue).get());
+    }
+
     @Test
     public void testSaltStackJobsWithArgsAsKwargsParser() throws Exception {
         InputStream is = this.getClass()

src/test/resources/single_int_value.json

@@ -0,0 +1 @@
+123

src/test/resources/single_null_value.json

@@ -0,0 +1 @@
+null