1 files changed, 39 insertions, 8 deletions

diff --git a/utils/src/test/java/org/onap/policy/common/utils/coder/StandardCoderTest.java b/utils/src/test/java/org/onap/policy/common/utils/coder/StandardCoderTest.java
index d5cde55a..33c7331e 100644
--- a/utils/src/test/java/org/onap/policy/common/utils/coder/StandardCoderTest.java
+++ b/utils/src/test/java/org/onap/policy/common/utils/coder/StandardCoderTest.java
@@ -2,7 +2,7 @@
  * ============LICENSE_START=======================================================
  * ONAP PAP
  * ================================================================================
- * Copyright (C) 2019-2020 AT&T Intellectual Property. All rights reserved.
+ * Copyright (C) 2019-2021 AT&T Intellectual Property. All rights reserved.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -23,12 +23,15 @@ 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.assertNotNull;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertSame;
 import static org.mockito.Mockito.doThrow;
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.when;
 
 import com.google.gson.JsonElement;
 import com.google.gson.JsonParseException;
+import com.google.gson.JsonSyntaxException;
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.File;
@@ -49,6 +52,7 @@ import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.TreeMap;
+import lombok.ToString;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -66,6 +70,35 @@ public class StandardCoderTest {
     }
 
     @Test
+    public void testConvert() throws CoderException {
+        // null source
+        assertNull(coder.convert(null, StandardCoderObject.class));
+
+        // same class of object
+        StandardCoderObject sco = new StandardCoderObject();
+        assertSame(sco, coder.convert(sco, StandardCoderObject.class));
+
+        // source is a string
+        assertEquals(Integer.valueOf(10), coder.convert("10", Integer.class));
+
+        // target is a string
+        assertEquals("10", coder.convert(10, String.class));
+
+        // source and target are different types, neither is a string
+        sco = coder.convert(Map.of("hello", "world"), StandardCoderObject.class);
+        assertEquals("world", sco.getString("hello"));
+
+        // throw an exeception
+        coder = new StandardCoder() {
+            @Override
+            protected <T> T fromJson(JsonElement json, Class<T> clazz) {
+                throw jpe;
+            }
+        };
+        assertThatThrownBy(() -> coder.convert(10, Long.class)).isInstanceOf(CoderException.class).hasCause(jpe);
+    }
+
+    @Test
     public void testEncodeObject() throws Exception {
         List<Integer> arr = Arrays.asList(1100, 1110);
         assertEquals("[1100,1110]", coder.encode(arr));
@@ -288,7 +321,9 @@ public class StandardCoderTest {
         assertEquals(json, coder.toJson(sco));
 
         // invalid json -> exception
-        assertThatThrownBy(() -> coder.fromJson(new StringReader("["), StandardCoderObject.class));
+        StringReader rdr = new StringReader("[");
+        assertThatThrownBy(() -> coder.fromJson(rdr, StandardCoderObject.class))
+                        .isInstanceOf(JsonSyntaxException.class);
     }
 
     @Test
@@ -312,7 +347,7 @@ public class StandardCoderTest {
 
         // test when decoding into a map
         @SuppressWarnings("unchecked")
-        Map<String,Object> map2 = coder.decode("{'intValue':10, 'dblVal':20.1}", TreeMap.class);
+        Map<String, Object> map2 = coder.decode("{'intValue':10, 'dblVal':20.1}", TreeMap.class);
         assertEquals("{dblVal=20.1, intValue=10}", map2.toString());
     }
 
@@ -324,13 +359,9 @@ public class StandardCoderTest {
     }
 
 
+    @ToString
     private static class MyObject {
         private String abc;
-
-        @Override
-        public String toString() {
-            return "MyObject [abc=" + abc + "]";
-        }
     }
 
     public static class MyMap {