PlatformChannelTest.java

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package io.flutter.embedding.engine.systemchannels;
 
import static org.junit.Assert.assertEquals;
import static org.mockito.ArgumentMatchers.refEq;
import static org.mockito.Mockito.doNothing;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
 
import android.content.res.AssetManager;
import androidx.test.ext.junit.runners.AndroidJUnit4;
import io.flutter.embedding.engine.FlutterJNI;
import io.flutter.embedding.engine.dart.DartExecutor;
import io.flutter.plugin.common.MethodCall;
import io.flutter.plugin.common.MethodChannel;
import org.json.JSONException;
import org.json.JSONObject;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.ArgumentCaptor;
import org.robolectric.annotation.Config;
 
@Config(manifest = Config.NONE)
@RunWith(AndroidJUnit4.class)
public class PlatformChannelTest {
  @Test
  public void platformChannel_hasStringsMessage() {
    MethodChannel rawChannel = mock(MethodChannel.class);
    FlutterJNI mockFlutterJNI = mock(FlutterJNI.class);
    DartExecutor dartExecutor = new DartExecutor(mockFlutterJNI, mock(AssetManager.class));
    PlatformChannel fakePlatformChannel = new PlatformChannel(dartExecutor);
    PlatformChannel.PlatformMessageHandler mockMessageHandler =
        mock(PlatformChannel.PlatformMessageHandler.class);
    fakePlatformChannel.setPlatformMessageHandler(mockMessageHandler);
    Boolean returnValue = true;
    when(mockMessageHandler.clipboardHasStrings()).thenReturn(returnValue);
    MethodCall methodCall = new MethodCall("Clipboard.hasStrings", null);
    MethodChannel.Result mockResult = mock(MethodChannel.Result.class);
    fakePlatformChannel.parsingMethodCallHandler.onMethodCall(methodCall, mockResult);
 
    JSONObject expected = new JSONObject();
    try {
      expected.put("value", returnValue);
    } catch (JSONException e) {
    }
    verify(mockResult).success(refEq(expected));
  }
 
  @Test
  public void platformChannel_shareInvokeMessage() {
    MethodChannel rawChannel = mock(MethodChannel.class);
    FlutterJNI mockFlutterJNI = mock(FlutterJNI.class);
    DartExecutor dartExecutor = new DartExecutor(mockFlutterJNI, mock(AssetManager.class));
    PlatformChannel fakePlatformChannel = new PlatformChannel(dartExecutor);
    PlatformChannel.PlatformMessageHandler mockMessageHandler =
        mock(PlatformChannel.PlatformMessageHandler.class);
    fakePlatformChannel.setPlatformMessageHandler(mockMessageHandler);
 
    ArgumentCaptor<String> valueCapture = ArgumentCaptor.forClass(String.class);
    doNothing().when(mockMessageHandler).share(valueCapture.capture());
 
    final String expectedContent = "Flutter";
    MethodCall methodCall = new MethodCall("Share.invoke", expectedContent);
    MethodChannel.Result mockResult = mock(MethodChannel.Result.class);
    fakePlatformChannel.parsingMethodCallHandler.onMethodCall(methodCall, mockResult);
 
    assertEquals(valueCapture.getValue(), expectedContent);
    verify(mockResult).success(null);
  }
}