test(android): add tests for PluginMethodHandler (#3153)

android/capacitor/build.gradle

@@ -71,4 +71,5 @@ dependencies {
     androidTestImplementation "androidx.test.espresso:espresso-core:$androidxEspressoCoreVersion"
     implementation "org.apache.cordova:framework:$cordovaAndroidVersion"
     testImplementation 'org.json:json:20140107'
-}
+    testImplementation 'org.mockito:mockito-inline:2.13.0'
+}

android/capacitor/src/test/java/com/getcapacitor/PluginMethodHandleTest.java

@@ -0,0 +1,44 @@
+package com.getcapacitor;
+
+import org.junit.Test;
+
+import java.lang.reflect.Method;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.BDDMockito.given;
+import static org.mockito.Mockito.mock;
+
+public class PluginMethodHandleTest {
+    @Test
+    public void getNameReturnsMethodName() {
+        PluginMethod pluginMethod = mock(PluginMethod.class);
+        Method mockMethod = mock(Method.class);
+
+        given(mockMethod.getName()).willReturn("methodName");
+        PluginMethodHandle pluginMethodHandle = new PluginMethodHandle(mockMethod, pluginMethod);
+
+        assertEquals(pluginMethodHandle.getName(), "methodName");
+    }
+
+    @Test
+    public void getMethodHandleReturnsMethodHandle() {
+        PluginMethod pluginMethod = mock(PluginMethod.class);
+        Method mockMethod = mock(Method.class);
+
+        given(pluginMethod.returnType()).willReturn("returnType");
+        PluginMethodHandle pluginMethodHandle = new PluginMethodHandle(mockMethod, pluginMethod);
+
+        assertEquals(pluginMethodHandle.getReturnType(), "returnType");
+    }
+
+
+    @Test
+    public void getMethodReturnsMethod() {
+        PluginMethod pluginMethod = mock(PluginMethod.class);
+        Method mockMethod = mock(Method.class);
+
+        PluginMethodHandle pluginMethodHandle = new PluginMethodHandle(mockMethod, pluginMethod);
+
+        assertEquals(pluginMethodHandle.getMethod(), mockMethod);
+    }
+}