Add test for WritableNativeMap

Summary: A simple test for WritableNativeMap. Also includes a test to verify that the key name exists in the error message if a dynamic cast exception occurs (this will be implemented in the future)

Reviewed By: mdvacca

Differential Revision: D12914375

fbshipit-source-id: 654674b1b32e7b3f38cc1364a2302d1ce08ec33e

ReactAndroid/src/androidTest/java/com/facebook/react/tests/core/WritableNativeMapTest.java

@@ -0,0 +1,104 @@
+package com.facebook.react.tests.core;
+
+import static org.fest.assertions.api.Assertions.assertThat;
+
+import android.support.test.runner.AndroidJUnit4;
+import com.facebook.react.bridge.UnexpectedNativeTypeException;
+import com.facebook.react.bridge.WritableNativeArray;
+import com.facebook.react.bridge.WritableNativeMap;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Ignore;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+public class WritableNativeMapTest {
+
+  private WritableNativeMap mMap;
+
+  @Before
+  public void setup() {
+    mMap = new WritableNativeMap();
+    mMap.putBoolean("boolean", true);
+    mMap.putDouble("double", 1.2);
+    mMap.putInt("int", 1);
+    mMap.putString("string", "abc");
+    mMap.putMap("map", new WritableNativeMap());
+    mMap.putArray("array", new WritableNativeArray());
+    mMap.putBoolean("dvacca", true);
+    mMap.setUseNativeAccessor(true);
+  }
+
+  @Test
+  public void testBoolean() {
+    assertThat(mMap.getBoolean("boolean")).isEqualTo(true);
+  }
+
+  @Test(expected = UnexpectedNativeTypeException.class)
+  public void testBooleanInvalidType() {
+    mMap.getBoolean("string");
+  }
+
+  @Test
+  public void testDouble() {
+    assertThat(mMap.getDouble("double")).isEqualTo(1.2);
+  }
+
+  @Test(expected = UnexpectedNativeTypeException.class)
+  public void testDoubleInvalidType() {
+    mMap.getDouble("string");
+  }
+
+  @Test
+  public void testInt() {
+    assertThat(mMap.getInt("int")).isEqualTo(1);
+  }
+
+  @Test(expected = UnexpectedNativeTypeException.class)
+  public void testIntInvalidType() {
+    mMap.getInt("string");
+  }
+
+  @Test
+  public void testString() {
+    assertThat(mMap.getString("string")).isEqualTo("abc");
+  }
+
+  @Test(expected = UnexpectedNativeTypeException.class)
+  public void testStringInvalidType() {
+    mMap.getString("int");
+  }
+
+  @Test
+  public void testMap() {
+    assertThat(mMap.getMap("map")).isNotNull();
+  }
+
+  @Test(expected = UnexpectedNativeTypeException.class)
+  public void testMapInvalidType() {
+    mMap.getMap("string");
+  }
+
+  @Test
+  public void testArray() {
+    assertThat(mMap.getArray("array")).isNotNull();
+  }
+
+  @Test(expected = UnexpectedNativeTypeException.class)
+  public void testArrayInvalidType() {
+    mMap.getArray("string");
+  }
+
+  @Ignore("Needs to be implemented")
+  @Test
+  public void testErrorMessageContainsKey() {
+    String key = "fkg";
+    try {
+      mMap.getString(key);
+      Assert.fail("Expected an UnexpectedNativeTypeException to be thrown");
+    } catch (UnexpectedNativeTypeException e) {
+      assertThat(e.getMessage()).contains(key);
+    }
+  }
+}