1 files changed, 211 insertions, 0 deletions
diff --git a/extras/src/test/java/com/google/gson/typeadapters/RuntimeTypeAdapterFactoryTest.java b/extras/src/test/java/com/google/gson/typeadapters/RuntimeTypeAdapterFactoryTest.java
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+++ b/extras/src/test/java/com/google/gson/typeadapters/RuntimeTypeAdapterFactoryTest.java
@@ -0,0 +1,211 @@
+/*
+ * Copyright (C) 2011 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.gson.typeadapters;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonParseException;
+import com.google.gson.TypeAdapterFactory;
+import junit.framework.TestCase;
+
+public final class RuntimeTypeAdapterFactoryTest extends TestCase {
+
+  public void testRuntimeTypeAdapter() {
+    RuntimeTypeAdapterFactory<BillingInstrument> rta = RuntimeTypeAdapterFactory.of(
+        BillingInstrument.class)
+        .registerSubtype(CreditCard.class);
+    Gson gson = new GsonBuilder()
+        .registerTypeAdapterFactory(rta)
+        .create();
+
+    CreditCard original = new CreditCard("Jesse", 234);
+    assertEquals("{\"type\":\"CreditCard\",\"cvv\":234,\"ownerName\":\"Jesse\"}",
+        gson.toJson(original, BillingInstrument.class));
+    BillingInstrument deserialized = gson.fromJson(
+        "{type:'CreditCard',cvv:234,ownerName:'Jesse'}", BillingInstrument.class);
+    assertEquals("Jesse", deserialized.ownerName);
+    assertTrue(deserialized instanceof CreditCard);
+  }
+
+  public void testRuntimeTypeIsBaseType() {
+    TypeAdapterFactory rta = RuntimeTypeAdapterFactory.of(
+        BillingInstrument.class)
+        .registerSubtype(BillingInstrument.class);
+    Gson gson = new GsonBuilder()
+        .registerTypeAdapterFactory(rta)
+        .create();
+
+    BillingInstrument original = new BillingInstrument("Jesse");
+    assertEquals("{\"type\":\"BillingInstrument\",\"ownerName\":\"Jesse\"}",
+        gson.toJson(original, BillingInstrument.class));
+    BillingInstrument deserialized = gson.fromJson(
+        "{type:'BillingInstrument',ownerName:'Jesse'}", BillingInstrument.class);
+    assertEquals("Jesse", deserialized.ownerName);
+  }
+
+  public void testNullBaseType() {
+    try {
+      RuntimeTypeAdapterFactory.of(null);
+      fail();
+    } catch (NullPointerException expected) {
+    }
+  }
+
+  public void testNullTypeFieldName() {
+    try {
+      RuntimeTypeAdapterFactory.of(BillingInstrument.class, null);
+      fail();
+    } catch (NullPointerException expected) {
+    }
+  }
+
+  public void testNullSubtype() {
+    RuntimeTypeAdapterFactory<BillingInstrument> rta = RuntimeTypeAdapterFactory.of(
+        BillingInstrument.class);
+    try {
+      rta.registerSubtype(null);
+      fail();
+    } catch (NullPointerException expected) {
+    }
+  }
+
+  public void testNullLabel() {
+    RuntimeTypeAdapterFactory<BillingInstrument> rta = RuntimeTypeAdapterFactory.of(
+        BillingInstrument.class);
+    try {
+      rta.registerSubtype(CreditCard.class, null);
+      fail();
+    } catch (NullPointerException expected) {
+    }
+  }
+
+  public void testDuplicateSubtype() {
+    RuntimeTypeAdapterFactory<BillingInstrument> rta = RuntimeTypeAdapterFactory.of(
+        BillingInstrument.class);
+    rta.registerSubtype(CreditCard.class, "CC");
+    try {
+      rta.registerSubtype(CreditCard.class, "Visa");
+      fail();
+    } catch (IllegalArgumentException expected) {
+    }
+  }
+
+  public void testDuplicateLabel() {
+    RuntimeTypeAdapterFactory<BillingInstrument> rta = RuntimeTypeAdapterFactory.of(
+        BillingInstrument.class);
+    rta.registerSubtype(CreditCard.class, "CC");
+    try {
+      rta.registerSubtype(BankTransfer.class, "CC");
+      fail();
+    } catch (IllegalArgumentException expected) {
+    }
+  }
+
+  public void testDeserializeMissingTypeField() {
+    TypeAdapterFactory billingAdapter = RuntimeTypeAdapterFactory.of(BillingInstrument.class)
+        .registerSubtype(CreditCard.class);
+    Gson gson = new GsonBuilder()
+        .registerTypeAdapterFactory(billingAdapter)
+        .create();
+    try {
+      gson.fromJson("{ownerName:'Jesse'}", BillingInstrument.class);
+      fail();
+    } catch (JsonParseException expected) {
+    }
+  }
+
+  public void testDeserializeMissingSubtype() {
+    TypeAdapterFactory billingAdapter = RuntimeTypeAdapterFactory.of(BillingInstrument.class)
+        .registerSubtype(BankTransfer.class);
+    Gson gson = new GsonBuilder()
+        .registerTypeAdapterFactory(billingAdapter)
+        .create();
+    try {
+      gson.fromJson("{type:'CreditCard',ownerName:'Jesse'}", BillingInstrument.class);
+      fail();
+    } catch (JsonParseException expected) {
+    }
+  }
+
+  public void testSerializeMissingSubtype() {
+    TypeAdapterFactory billingAdapter = RuntimeTypeAdapterFactory.of(BillingInstrument.class)
+        .registerSubtype(BankTransfer.class);
+    Gson gson = new GsonBuilder()
+        .registerTypeAdapterFactory(billingAdapter)
+        .create();
+    try {
+      gson.toJson(new CreditCard("Jesse", 456), BillingInstrument.class);
+      fail();
+    } catch (JsonParseException expected) {
+    }
+  }
+
+  public void testSerializeCollidingTypeFieldName() {
+    TypeAdapterFactory billingAdapter = RuntimeTypeAdapterFactory.of(BillingInstrument.class, "cvv")
+        .registerSubtype(CreditCard.class);
+    Gson gson = new GsonBuilder()
+        .registerTypeAdapterFactory(billingAdapter)
+        .create();
+    try {
+      gson.toJson(new CreditCard("Jesse", 456), BillingInstrument.class);
+      fail();
+    } catch (JsonParseException expected) {
+    }
+  }
+
+  public void testSerializeWrappedNullValue() {
+    TypeAdapterFactory billingAdapter = RuntimeTypeAdapterFactory.of(BillingInstrument.class)
+        .registerSubtype(CreditCard.class)
+        .registerSubtype(BankTransfer.class);    
+    Gson gson = new GsonBuilder()
+        .registerTypeAdapterFactory(billingAdapter)
+        .create();    
+    String serialized = gson.toJson(new BillingInstrumentWrapper(null), BillingInstrumentWrapper.class);
+    BillingInstrumentWrapper deserialized = gson.fromJson(serialized, BillingInstrumentWrapper.class);
+    assertNull(deserialized.instrument);
+  }
+
+  static class BillingInstrumentWrapper {
+    BillingInstrument instrument;
+    BillingInstrumentWrapper(BillingInstrument instrument) {
+      this.instrument = instrument;
+    }
+  }
+
+  static class BillingInstrument {
+    private final String ownerName;
+    BillingInstrument(String ownerName) {
+      this.ownerName = ownerName;
+    }
+  }
+
+  static class CreditCard extends BillingInstrument {
+    int cvv;
+    CreditCard(String ownerName, int cvv) {
+      super(ownerName);
+      this.cvv = cvv;
+    }
+  }
+
+  static class BankTransfer extends BillingInstrument {
+    int bankAccount;
+    BankTransfer(String ownerName, int bankAccount) {
+      super(ownerName);
+      this.bankAccount = bankAccount;
+    }
+  }
+}