Merge "EglDisplay may be null and cause Null point exception" into qt-r1-dev

packages/SystemUI/src/com/android/systemui/glwallpaper/EglHelper.java

@@ -146,7 +146,13 @@ public class EglHelper {
      * @return true if EglSurface is ready.
      */
     public boolean createEglSurface(SurfaceHolder surfaceHolder) {
-        mEglSurface = eglCreateWindowSurface(mEglDisplay, mEglConfig, surfaceHolder, null, 0);
+        if (hasEglDisplay()) {
+            mEglSurface = eglCreateWindowSurface(mEglDisplay, mEglConfig, surfaceHolder, null, 0);
+        } else {
+            Log.w(TAG, "mEglDisplay is null");
+            return false;
+        }
+
         if (mEglSurface == null || mEglSurface == EGL_NO_SURFACE) {
             Log.w(TAG, "createWindowSurface failed: " + GLUtils.getEGLErrorString(eglGetError()));
             return false;
@@ -186,7 +192,13 @@ public class EglHelper {
     public boolean createEglContext() {
         int[] attrib_list = new int[] {EGL_CONTEXT_CLIENT_VERSION, 2,
                 EGL_CONTEXT_PRIORITY_LEVEL_IMG, EGL_CONTEXT_PRIORITY_LOW_IMG, EGL_NONE};
-        mEglContext = eglCreateContext(mEglDisplay, mEglConfig, EGL_NO_CONTEXT, attrib_list, 0);
+        if (hasEglDisplay()) {
+            mEglContext = eglCreateContext(mEglDisplay, mEglConfig, EGL_NO_CONTEXT, attrib_list, 0);
+        } else {
+            Log.w(TAG, "mEglDisplay is null");
+            return false;
+        }
+
         if (mEglContext == EGL_NO_CONTEXT) {
             Log.w(TAG, "eglCreateContext failed: " + GLUtils.getEGLErrorString(eglGetError()));
             return false;
@@ -212,6 +224,14 @@ public class EglHelper {
         return mEglContext != null;
     }
 
+    /**
+     * Check if we have EglDisplay.
+     * @return true if EglDisplay is ready.
+     */
+    public boolean hasEglDisplay() {
+        return mEglDisplay != null;
+    }
+
     /**
      * Swap buffer to display.
      * @return true if swap successfully.
@@ -235,7 +255,9 @@ public class EglHelper {
         if (hasEglContext()) {
             destroyEglContext();
         }
-        eglTerminate(mEglDisplay);
+        if (hasEglDisplay()) {
+            eglTerminate(mEglDisplay);
+        }
         mEglReady = false;
     }
 

packages/SystemUI/tests/src/com/android/systemui/glwallpaper/EglHelperTest.java

@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2019 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.systemui.glwallpaper;
+
+import static org.junit.Assert.*;
+import static org.mockito.Mockito.RETURNS_DEFAULTS;
+import static org.mockito.Mockito.mock;
+
+import android.testing.AndroidTestingRunner;
+import android.testing.TestableLooper;
+import android.view.SurfaceHolder;
+
+import androidx.test.filters.SmallTest;
+
+import com.android.systemui.SysuiTestCase;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+
+
+@SmallTest
+@RunWith(AndroidTestingRunner.class)
+@TestableLooper.RunWithLooper
+public class EglHelperTest extends SysuiTestCase {
+
+    @Mock
+    private EglHelper mEglHelper;
+    @Mock
+    private SurfaceHolder mSurfaceHolder;
+
+    @Before
+    public void setUp() throws Exception {
+        mEglHelper = mock(EglHelper.class, RETURNS_DEFAULTS);
+        mSurfaceHolder = mock(SurfaceHolder.class, RETURNS_DEFAULTS);
+    }
+
+    @Test
+    public void testInit_finish() {
+        mEglHelper.init(mSurfaceHolder);
+        mEglHelper.finish();
+    }
+
+    @Test
+    public void testFinish_shouldNotCrash() {
+        assertFalse(mEglHelper.hasEglDisplay());
+        assertFalse(mEglHelper.hasEglSurface());
+        assertFalse(mEglHelper.hasEglContext());
+
+        mEglHelper.finish();
+    }
+}