Merge "Invalidate D&D operations when destination Docinfo is null." into arc-apps

package com.android.documentsui.dirlist;

import static com.android.documentsui.base.Shared.DEBUG;

import android.app.Activity;

import android.content.ClipData;

import android.view.DragEvent;

import android.view.View;

import android.util.Log;

import com.android.documentsui.AbstractActionHandler;

import com.android.documentsui.AbstractDragHost;

 */

class DragHost<T extends Activity & AbstractActionHandler.CommonAddons> extends AbstractDragHost {

    private static final String TAG = "dirlist.DragHost";

    private final T mActivity;

    private final SelectionManager mSelectionMgr;

    private final ActionHandler mActions;

        assert (clipData != null);

        DocumentInfo dst = mDestinationLookup.lookup(v);

        if (dst == null) {

            if (DEBUG) Log.d(TAG, "Invalid destination. Ignoring.");

            return false;

        }

        // If destination is already at top of stack, no need to pass it in

        DocumentStack dstStack = dst.equals(mState.stack.peek())

                ? mState.stack

/*

 * Copyright (C) 2017 The Android Open Source Project

 *

 * 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.android.documentsui.dirlist;

import static junit.framework.Assert.assertFalse;

import static junit.framework.Assert.assertTrue;

import android.content.ClipData;

import android.database.Cursor;

import android.support.test.filters.SmallTest;

import android.support.test.runner.AndroidJUnit4;

import android.view.DragEvent;

import android.view.View;

import com.android.documentsui.base.DocumentInfo;

import com.android.documentsui.files.TestActivity;

import com.android.documentsui.selection.SelectionManager;

import com.android.documentsui.testing.ClipDatas;

import com.android.documentsui.testing.DragEvents;

import com.android.documentsui.testing.SelectionManagers;

import com.android.documentsui.testing.TestActionHandler;

import com.android.documentsui.testing.TestDragAndDropManager;

import com.android.documentsui.testing.TestEnv;

import com.android.documentsui.testing.Views;

import com.android.documentsui.ui.TestDialogController;

import org.junit.Before;

import org.junit.Test;

import org.junit.runner.RunWith;

import java.util.List;

@RunWith(AndroidJUnit4.class)

@SmallTest

public class DragHostTest {

    private static final List<String> ITEMS = TestData.create(100);

    private TestEnv mEnv;

    private TestActivity mActivity;

    private TestActionHandler mActionHandler;

    private TestDialogController mDialogs;

    private DragHost<?> dragHost;

    private TestDragAndDropManager mDragAndDropManager;

    private SelectionManager mSelectionMgr;

    private boolean mIsDocumentView;

    private DocumentHolder mNextDocumentHolder;

    private DocumentInfo mNextDocumentInfo;

    @Before

    public void setUp() throws Exception {

        mEnv = TestEnv.create();

        mActivity = TestActivity.create(mEnv);

        mDialogs = new TestDialogController();

        mDragAndDropManager = new TestDragAndDropManager();

        mSelectionMgr = SelectionManagers.createTestInstance(ITEMS);

        mActionHandler = new TestActionHandler();

        dragHost = new DragHost<>(

                mActivity,

                mDragAndDropManager,

                mSelectionMgr,

                mActionHandler,

                mEnv.state,

                mDialogs,

                (View v) -> mIsDocumentView,

                (View v) -> mNextDocumentHolder,

                (View v) -> mNextDocumentInfo

        );

    }

    @Test

    public void testHandleDrop_onValidView() {

        final ClipData data = ClipDatas.createTestClipData();

        final DragEvent dropEvent = DragEvents.createTestDropEvent(data);

        final View view = Views.createTestView();

        mNextDocumentInfo = TestEnv.FOLDER_0;

        mDragAndDropManager.dropOnDocumentHandler.nextReturn(true);

        assertTrue(dragHost.handleDropEvent(view, dropEvent));

        mDragAndDropManager.dropOnDocumentHandler.assertCalled();

    }

    @Test

    public void testHandleDrop_notOnValidView() {

        final ClipData data = ClipDatas.createTestClipData();

        final DragEvent dropEvent = DragEvents.createTestDropEvent(data);

        final View view = Views.createTestView();

        assertFalse(dragHost.handleDropEvent(view, dropEvent));

        mDragAndDropManager.dropOnDocumentHandler.assertNotCalled();

    }

}