Enable googletest for unittesting (#398)

0. Support arm-cross, x64-native, arm-native, and tizen-obs build
1. Introduce googletest at top level
2. Add simple test tflite_test.cc : this should be removed
3. Add howto doc

1 files changed, 27 insertions, 0 deletions

diff --git a/docs/HowToAddUnittest.md b/docs/HowToAddUnittest.md
new file mode 100644
index 000000000..6612f153d
--- /dev/null
+++ b/docs/HowToAddUnittest.md
@@ -0,0 +1,27 @@
+# How to Add Unittest using gtest(googletest)
+
+### 1. make own test code
+```
+#include "gtest/gtest.h"
+
+TEST(TFLite_test_case, simple_test)
+{
+    EXPECT_EQ(1, 1);
+}
+```
+
+### 2. Add dependancy on `googletest` to your test executable
+```
+add_executable($YOURTEST_TARGET yourtest1.cc yourtest2.cc)
+add_dependencies($YOURTEST_TARGET googletest)
+```
+
+### 3. Link test executable against libgtest.a and libgtest_main.a (+ pthread)
+```
+target_link_libraries($YOURTEST_TARGET libgtest.a libgtest_main.a pthread)
+```
+
+### 4. Install test executable into Product/out/unittest
+```
+install(TARGETS $YOURTEST_TARGET DESTINATION unittest)
+```