gson work

binase · Aug 23, 2014 · c00ef53 · c00ef53
1 parent 2e48d26
commit c00ef53
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Showing 3 changed files with 42 additions and 30 deletions.
diff --git a/gson/src/test/java/org/baeldung/gson/deserialization/Foo.java b/gson/src/test/java/org/baeldung/gson/deserialization/Foo.java
@@ -9,6 +9,10 @@ public Foo(final int intValue, final String stringValue) {
         this.stringValue = stringValue;
     }
 
+    public Foo() {
+        super();
+    }
+
     // API
 
     @Override

diff --git a/gson/src/test/java/org/baeldung/gson/deserialization/GenericFoo.java b/gson/src/test/java/org/baeldung/gson/deserialization/GenericFoo.java
@@ -1,18 +1,18 @@
 package org.baeldung.gson.deserialization;
 
-public class GenericFoo<INTEGER> {
+public class GenericFoo<T> {
 
-    public INTEGER intField;
+    public T theValue;
 
-    GenericFoo(final INTEGER value) {
-        intField = value;
+    public GenericFoo(final T value) {
+        theValue = value;
     }
 
     //
 
     @Override
-    public String toString() {
-        return "GenericTargetClass{" + "intField=" + intField + '}';
+    public final String toString() {
+        return "GenericTargetClass{" + "intField=" + theValue + '}';
     }
 
 }
diff --git a/gson/src/test/java/org/baeldung/gson/deserialization/test/GsonDeserializationTest.java b/gson/src/test/java/org/baeldung/gson/deserialization/test/GsonDeserializationTest.java
@@ -8,15 +8,14 @@
 
 import java.lang.reflect.Type;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.Collection;
-import java.util.List;
 
 import org.baeldung.gson.deserialization.Foo;
 import org.baeldung.gson.deserialization.FooDeserializerFromJsonWithDifferentFields;
 import org.baeldung.gson.deserialization.GenericFoo;
 import org.junit.Test;
 
+import com.google.common.collect.Lists;
 import com.google.gson.Gson;
 import com.google.gson.GsonBuilder;
 import com.google.gson.JsonElement;
@@ -29,57 +28,66 @@ public class GsonDeserializationTest {
     // tests - single element
 
     @Test
-    public final void givenJsonHasExtraValuesButGsonIsIgnoringExtras_whenDeserializing_thenCorrect() {
-        final String serializedSourceObject = "{\"intValue\":1,\"stringValue\":\"one\",\"extraString\":\"two\",\"extraFloat\":2.2}";
-        final Foo targetObject = new Gson().fromJson(serializedSourceObject, Foo.class);
+    public final void whenDeserializingToSimpleObject_thenCorrect() {
+        final String json = "{\"intValue\":1,\"stringValue\":\"one\"}";
+
+        final Foo targetObject = new Gson().fromJson(json, Foo.class);
 
         assertEquals(targetObject.intValue, 1);
         assertEquals(targetObject.stringValue, "one");
     }
 
     @Test
-    public final void givenJsonHasNonMatchingFieldNames_whenDeserializingWithCustomDeserializer_thenCorrect() {
-        final String jsonSourceObject = "{\"valueInt\":7,\"valueString\":\"seven\"}";
+    public final void givenJsonHasExtraValues_whenDeserializing_thenCorrect() {
+        final String json = "{\"intValue\":1,\"stringValue\":\"one\",\"extraString\":\"two\",\"extraFloat\":2.2}";
+        final Foo targetObject = new Gson().fromJson(json, Foo.class);
+
+        assertEquals(targetObject.intValue, 1);
+        assertEquals(targetObject.stringValue, "one");
+    }
+
+    @Test
+    public final void givenJsonHasNonMatchingFields_whenDeserializingWithCustomDeserializer_thenCorrect() {
+        final String json = "{\"valueInt\":7,\"valueString\":\"seven\"}";
 
         final GsonBuilder gsonBldr = new GsonBuilder();
         gsonBldr.registerTypeAdapter(Foo.class, new FooDeserializerFromJsonWithDifferentFields());
-        final Foo targetObject = gsonBldr.create().fromJson(jsonSourceObject, Foo.class);
+        final Foo targetObject = gsonBldr.create().fromJson(json, Foo.class);
 
         assertEquals(targetObject.intValue, 7);
         assertEquals(targetObject.stringValue, "seven");
     }
 
     @Test
-    public final void givenUsingGson_whenDeserializingGeneric_thenCorrect() {
-        final Type genericTargetClassType = new TypeToken<GenericFoo<Integer>>() {
+    public final void whenDeserializingToGenericObject_thenCorrect() {
+        final Type typeToken = new TypeToken<GenericFoo<Integer>>() {
         }.getType();
-        final String serializedSourceObject = "{\"intField\":1}";
+        final String json = "{\"theValue\":1}";
 
-        final GenericFoo<Integer> targetObject = new Gson().fromJson(serializedSourceObject, genericTargetClassType);
+        final GenericFoo<Integer> targetObject = new Gson().fromJson(json, typeToken);
 
-        assertEquals(targetObject.intField, new Integer(1));
+        assertEquals(targetObject.theValue, new Integer(1));
     }
 
     // tests - multiple elements
 
     @Test
-    public final void givenJsonArrayOfFoos_whenDeserializingToList_thenCorrect() {
-        final String jsonSourceObject = "[{\"intValue\":1,\"stringValue\":\"one\"},{\"intValue\":2,\"stringValue\":\"two\"}]";
-        final Foo[] objectsAsArray = new GsonBuilder().create().fromJson(jsonSourceObject, Foo[].class);
-        final List<Foo> targetList = Arrays.asList(objectsAsArray);
-
-        assertThat(targetList, hasItem(new Foo(1, "one")));
-        assertThat(targetList, hasItem(new Foo(2, "two")));
-        assertThat(targetList, not(hasItem(new Foo(1, "two"))));
+    public final void givenJsonArrayOfFoos_whenDeserializingToArray_thenCorrect() {
+        final String json = "[{\"intValue\":1,\"stringValue\":\"one\"}," + "{\"intValue\":2,\"stringValue\":\"two\"}]";
+        final Foo[] targetArray = new GsonBuilder().create().fromJson(json, Foo[].class);
+
+        assertThat(Lists.newArrayList(targetArray), hasItem(new Foo(1, "one")));
+        assertThat(Lists.newArrayList(targetArray), hasItem(new Foo(2, "two")));
+        assertThat(Lists.newArrayList(targetArray), not(hasItem(new Foo(1, "two"))));
     }
 
     @Test
-    public final void givenUsingGson_whenDeserializingCollection_thenCorrect() {
-        final String serializedSourceCollection = "[{\"intValue\":1,\"stringValue\":\"one\"},{\"intValue\":2,\"stringValue\":\"two\"}]";
+    public final void givenJsonArrayOfFoos_whenDeserializingCollection_thenCorrect() {
+        final String json = "[{\"intValue\":1,\"stringValue\":\"one\"},{\"intValue\":2,\"stringValue\":\"two\"}]";
         final Type targetClassType = new TypeToken<ArrayList<Foo>>() {
         }.getType();
 
-        final Collection<Foo> targetCollection = new Gson().fromJson(serializedSourceCollection, targetClassType);
+        final Collection<Foo> targetCollection = new Gson().fromJson(json, targetClassType);
         assertThat(targetCollection, instanceOf(ArrayList.class));
     }