Add pretty() method to Coder

"Pretty" JSON is often needed, so added Coder.pretty() to facilitate
that.
Incorporated review comment(s):
- changed pretty() to encode(object, pretty)

Issue-ID: POLICY-1625
Signed-off-by: Jim Hahn <jrh3@att.com>
Change-Id: I180fa6de416836008bf1c410132ae30f4dde9271

1 files changed, 22 insertions, 0 deletions

diff --git a/utils/src/test/java/org/onap/policy/common/utils/coder/StandardValCoderTest.java b/utils/src/test/java/org/onap/policy/common/utils/coder/StandardValCoderTest.java
index 38106f57..2fcdb0dd 100644
--- a/utils/src/test/java/org/onap/policy/common/utils/coder/StandardValCoderTest.java
+++ b/utils/src/test/java/org/onap/policy/common/utils/coder/StandardValCoderTest.java
@@ -20,8 +20,10 @@
 
 package org.onap.policy.common.utils.coder;
 
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotEquals;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
@@ -119,6 +121,26 @@ public class StandardValCoderTest {
         StringWriter writer = new StringWriter();
         valCoder.encode(writer, valOuter);
         assertEquals(valOuterJson, writer.toString());
+
+        // test exception case with an empty object
+        assertThatThrownBy(() -> valCoder.encode(new ValOuter())).isInstanceOf(CoderException.class);
+    }
+
+    @Test
+    public void testPretty() throws CoderException {
+        StandardValCoder valCoder = new StandardValCoder(jsonSchema, "test-schema");
+        ValOuter valOuter = valCoder.decode(validJson, ValOuter.class);
+
+        String valOuterJson = valCoder.encode(valOuter);
+        assertEquals(valOuterJson, valCoder.encode(valOuter, false));
+        String prettyValOuterJson = valCoder.encode(valOuter, true);
+        assertNotEquals(valOuterJson, prettyValOuterJson);
+
+        assertEquals(valOuter, valCoder.decode(prettyValOuterJson, ValOuter.class));
+
+        // test exception cases with an empty object
+        assertThatThrownBy(() -> valCoder.encode(new ValOuter(), false)).isInstanceOf(CoderException.class);
+        assertThatThrownBy(() -> valCoder.encode(new ValOuter(), true)).isInstanceOf(CoderException.class);
     }
 
     @Test