1 /*
2 * Copyright 2020 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #undef LOG_TAG
18 #define LOG_TAG "LibSurfaceFlingerUnittests"
19
20 #include "DisplayTransactionTestHelpers.h"
21
22 namespace android {
23 namespace {
24
25 class HotplugTest : public DisplayTransactionTest {};
26
TEST_F(HotplugTest,enqueuesEventsForDisplayTransaction)27 TEST_F(HotplugTest, enqueuesEventsForDisplayTransaction) {
28 constexpr HWDisplayId hwcDisplayId1 = 456;
29 constexpr HWDisplayId hwcDisplayId2 = 654;
30
31 // --------------------------------------------------------------------
32 // Preconditions
33
34 // Set the main thread id so that the current thread does not appear to be
35 // the main thread.
36 mFlinger.mutableMainThreadId() = std::thread::id();
37
38 // --------------------------------------------------------------------
39 // Call Expectations
40
41 // We expect invalidate() to be invoked once to trigger display transaction
42 // processing.
43 EXPECT_CALL(*mMessageQueue, invalidate()).Times(1);
44
45 // --------------------------------------------------------------------
46 // Invocation
47
48 // Simulate two hotplug events (a connect and a disconnect)
49 mFlinger.onComposerHalHotplug(hwcDisplayId1, Connection::CONNECTED);
50 mFlinger.onComposerHalHotplug(hwcDisplayId2, Connection::DISCONNECTED);
51
52 // --------------------------------------------------------------------
53 // Postconditions
54
55 // The display transaction needed flag should be set.
56 EXPECT_TRUE(hasTransactionFlagSet(eDisplayTransactionNeeded));
57
58 // All events should be in the pending event queue.
59 const auto& pendingEvents = mFlinger.mutablePendingHotplugEvents();
60 ASSERT_EQ(2u, pendingEvents.size());
61 EXPECT_EQ(hwcDisplayId1, pendingEvents[0].hwcDisplayId);
62 EXPECT_EQ(Connection::CONNECTED, pendingEvents[0].connection);
63 EXPECT_EQ(hwcDisplayId2, pendingEvents[1].hwcDisplayId);
64 EXPECT_EQ(Connection::DISCONNECTED, pendingEvents[1].connection);
65 }
66
TEST_F(HotplugTest,processesEnqueuedEventsIfCalledOnMainThread)67 TEST_F(HotplugTest, processesEnqueuedEventsIfCalledOnMainThread) {
68 constexpr HWDisplayId displayId1 = 456;
69
70 // --------------------------------------------------------------------
71 // Note:
72 // --------------------------------------------------------------------
73 // This test case is a bit tricky. We want to verify that
74 // onComposerHalHotplug() calls processDisplayHotplugEventsLocked(), but we
75 // don't really want to provide coverage for everything the later function
76 // does as there are specific tests for it.
77 // --------------------------------------------------------------------
78
79 // --------------------------------------------------------------------
80 // Preconditions
81
82 // Set the main thread id so that the current thread does appear to be the
83 // main thread.
84 mFlinger.mutableMainThreadId() = std::this_thread::get_id();
85
86 // --------------------------------------------------------------------
87 // Call Expectations
88
89 // We expect invalidate() to be invoked once to trigger display transaction
90 // processing.
91 EXPECT_CALL(*mMessageQueue, invalidate()).Times(1);
92
93 // --------------------------------------------------------------------
94 // Invocation
95
96 // Simulate a disconnect on a display id that is not connected. This should
97 // be enqueued by onComposerHalHotplug(), and dequeued by
98 // processDisplayHotplugEventsLocked(), but then ignored as invalid.
99 mFlinger.onComposerHalHotplug(displayId1, Connection::DISCONNECTED);
100
101 // --------------------------------------------------------------------
102 // Postconditions
103
104 // The display transaction needed flag should be set.
105 EXPECT_TRUE(hasTransactionFlagSet(eDisplayTransactionNeeded));
106
107 // There should be no event queued on return, as it should have been
108 // processed.
109 EXPECT_TRUE(mFlinger.mutablePendingHotplugEvents().empty());
110 }
111
112 } // namespace
113 } // namespace android
114