Added an example of @FixedSize union am: 75253c2507 am: 45d5b5372e

Original change: https://android-review.googlesource.com/c/platform/system/libfmq/+/1893915

Change-Id: I0d9cb2b3d9a27d40c82214d7db365339bcb21f12

3 files changed, 31 insertions, 2 deletions

diff --git a/tests/aidl/android/fmq/test/FixedParcelable.aidl b/tests/aidl/android/fmq/test/FixedParcelable.aidl
index acb54f2..7d0c0e5 100644
--- a/tests/aidl/android/fmq/test/FixedParcelable.aidl
+++ b/tests/aidl/android/fmq/test/FixedParcelable.aidl
@@ -17,9 +17,11 @@
 package android.fmq.test;
 
 import android.fmq.test.EventFlagBits;
+import android.fmq.test.FixedUnion;
 
 @FixedSize
 parcelable FixedParcelable {
   int a;
   EventFlagBits b;
+  FixedUnion u;
 }
diff --git a/tests/aidl/android/fmq/test/FixedUnion.aidl b/tests/aidl/android/fmq/test/FixedUnion.aidl
new file mode 100644
index 0000000..40a4a28
--- /dev/null
+++ b/tests/aidl/android/fmq/test/FixedUnion.aidl
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2021 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 android.fmq.test;
+
+import android.fmq.test.EventFlagBits;
+
+@FixedSize
+union FixedUnion {
+  int a;
+  EventFlagBits b;
+}
diff --git a/tests/msgq_test_client.cpp b/tests/msgq_test_client.cpp
index a6f1ccc..1ff9d50 100644
--- a/tests/msgq_test_client.cpp
+++ b/tests/msgq_test_client.cpp
@@ -20,6 +20,7 @@
 #endif
 
 #include <aidl/android/fmq/test/FixedParcelable.h>
+#include <aidl/android/fmq/test/FixedUnion.h>
 #include <aidl/android/fmq/test/ITestAidlMsgQ.h>
 #include <android-base/logging.h>
 #include <android/binder_manager.h>
@@ -38,6 +39,7 @@ using android::status_t;
 // generated
 using ::aidl::android::fmq::test::EventFlagBits;
 using ::aidl::android::fmq::test::FixedParcelable;
+using ::aidl::android::fmq::test::FixedUnion;
 using ::aidl::android::fmq::test::ITestAidlMsgQ;
 using android::hardware::tests::msgq::V1_0::ITestMsgQ;
 
@@ -1169,8 +1171,8 @@ TYPED_TEST(UnsynchronizedWriteClient, OverflowNotificationTest) {
  * annotated with @FixedSize is supported. A parcelable without it, will cause
  * a compilation error.
  */
-typedef ::testing::Types<FixedParcelable, EventFlagBits, bool, int8_t, char, char16_t, int32_t,
-                         int64_t, float, double>
+typedef ::testing::Types<FixedParcelable, FixedUnion, EventFlagBits, bool, int8_t, char, char16_t,
+                         int32_t, int64_t, float, double>
         AidlTypeCheckTypes;
 
 template <typename T>