commit 970a04f189d66999ca4928669083ac15eba42373
author Yichi Chen <yichichen@google.com> Mon Jun 25 20:53:32 2018 +0800
committer Yichi Chen <yichichen@google.com> Mon Jul 16 15:03:24 2018 +0800
tree a42e1d789a2c6715f2cdf7e423eb905212bd3fec
parent 2eae6d383ad9973080296a9684db1ad691947e19

SurfaceFlinger: Correct DetachChildren case in SFFakeHwc_test

According to commit 161410b01a37bcc5522d8e91fe0a743989c86e70, layers
with the same client as their parent should not be detached. Thus, the
test case should be modified to have DetachChildrenSameClient and
DetachChildrenDifferentClient two test cases

Test: Run sffakehwc_test
Change-Id: I07f4d4ab2dd2024bfa2de2dfa68e28c468066252

services/surfaceflinger/tests/fakehwc/SFFakeHwc_test.cpp

diff --git a/services/surfaceflinger/tests/fakehwc/SFFakeHwc_test.cpp b/services/surfaceflinger/tests/fakehwc/SFFakeHwc_test.cpp
index 9b31985..7a49793 100644
--- a/services/surfaceflinger/tests/fakehwc/SFFakeHwc_test.cpp
+++ b/services/surfaceflinger/tests/fakehwc/SFFakeHwc_test.cpp
@@ -1095,7 +1095,7 @@
     EXPECT_TRUE(framesAreSame(referenceFrame2, sFakeComposer->getLatestFrame()));
 }
 
-TEST_F(ChildLayerTest, DetachChildren) {
+TEST_F(ChildLayerTest, DetachChildrenSameClient) {
     {
         TransactionScope ts(*sFakeComposer);
         ts.show(mChild);
@@ -1111,14 +1111,59 @@
 
     {
         TransactionScope ts(*sFakeComposer);
+        ts.setPosition(mFGSurfaceControl, 0, 0);
         ts.detachChildren(mFGSurfaceControl);
     }
 
     {
         TransactionScope ts(*sFakeComposer);
+        ts.setPosition(mFGSurfaceControl, 64, 64);
         ts.hide(mChild);
     }
 
+    std::vector<RenderState> refFrame(2);
+    refFrame[BG_LAYER] = mBaseFrame[BG_LAYER];
+    refFrame[FG_LAYER] = mBaseFrame[FG_LAYER];
+
+    EXPECT_TRUE(framesAreSame(refFrame, sFakeComposer->getLatestFrame()));
+}
+
+TEST_F(ChildLayerTest, DetachChildrenDifferentClient) {
+    sp<SurfaceComposerClient> newComposerClient = new SurfaceComposerClient;
+    sp<SurfaceControl> childNewClient =
+            newComposerClient->createSurface(String8("New Child Test Surface"), 10, 10,
+                                             PIXEL_FORMAT_RGBA_8888, 0, mFGSurfaceControl.get());
+    ASSERT_TRUE(childNewClient != nullptr);
+    ASSERT_TRUE(childNewClient->isValid());
+    fillSurfaceRGBA8(childNewClient, LIGHT_GRAY);
+
+    {
+        TransactionScope ts(*sFakeComposer);
+        ts.hide(mChild);
+        ts.show(childNewClient);
+        ts.setPosition(childNewClient, 10, 10);
+        ts.setPosition(mFGSurfaceControl, 64, 64);
+    }
+
+    auto referenceFrame = mBaseFrame;
+    referenceFrame[FG_LAYER].mDisplayFrame = hwc_rect_t{64, 64, 64 + 64, 64 + 64};
+    referenceFrame[CHILD_LAYER].mDisplayFrame =
+            hwc_rect_t{64 + 10, 64 + 10, 64 + 10 + 10, 64 + 10 + 10};
+    EXPECT_TRUE(framesAreSame(referenceFrame, sFakeComposer->getLatestFrame()));
+
+    {
+        TransactionScope ts(*sFakeComposer);
+        ts.detachChildren(mFGSurfaceControl);
+        ts.setPosition(mFGSurfaceControl, 0, 0);
+    }
+
+    {
+        TransactionScope ts(*sFakeComposer);
+        ts.setPosition(mFGSurfaceControl, 64, 64);
+        ts.setPosition(childNewClient, 0, 0);
+        ts.hide(childNewClient);
+    }
+
     // Nothing should have changed. The child control becomes a no-op
     // zombie on detach. See comments for detachChildren in the
     // SurfaceControl.h file.