Camera2: Tests -- Fork each test before executing it

Use CAMERA2_TEST_FORKING_DISABLED=1 environment variable to override this
behavior (e.g. when wanting to attach gdb to the test app).

Change-Id: Ib639885bdb827fc2415c878cbcb1b2d84dff687b
diff --git a/tests/camera2/TestExtensions.h b/tests/camera2/TestExtensions.h
new file mode 100644
index 0000000..68a5e97
--- /dev/null
+++ b/tests/camera2/TestExtensions.h
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2012 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.
+ */
+
+#ifndef __ANDROID_HAL_CAMERA2_TESTS_EXTENSIONS__
+#define __ANDROID_HAL_CAMERA2_TESTS_EXTENSIONS__
+
+#include "TestForkerEventListener.h"
+
+// Use at the beginning of each Test::SetUp() impl
+#define TEST_EXTENSION_FORKING_SET_UP                                       \
+    do {                                                                    \
+        if (TEST_EXTENSION_FORKING_ENABLED) {                               \
+            if (!TestForkerEventListener::mIsForked) {                      \
+                return;                                                     \
+            }                                                               \
+        }                                                                   \
+    } while (false)                                                         \
+
+// Use at the beginning of each Test::TearDown() impl
+#define TEST_EXTENSION_FORKING_TEAR_DOWN   TEST_EXTENSION_FORKING_SET_UP
+
+// Use at the beginning of each Test::Test constructor
+#define TEST_EXTENSION_FORKING_CONSTRUCTOR TEST_EXTENSION_FORKING_SET_UP
+
+// Use at the beginning of each Test::~Test destructor
+#define TEST_EXTENSION_FORKING_DESTRUCTOR  TEST_EXTENSION_FORKING_TEAR_DOWN
+
+// Use at the beginning of each test body, e.g. TEST(x,y), TEST_F(x,y), etc
+#define TEST_EXTENSION_FORKING_INIT                                         \
+    do {                                                                    \
+        TEST_EXTENSION_FORKING_SET_UP;                                      \
+        if (HasFatalFailure()) return;                                      \
+    } while(false)                                                          \
+
+// Are we running each test by forking it?
+#define TEST_EXTENSION_FORKING_ENABLED  (TestForkerEventListener::mUsingForking)
+
+
+
+#endif
+