Add unittest

nnvm/Makefile

-export LDFLAGS= -pthread -lm
-export CFLAGS=  -std=c++11 -Wall -O3 -msse2  -Wno-unknown-pragmas -funroll-loops\
+export LDFLAGS = -pthread -lm
+export CFLAGS =  -std=c++11 -Wall -O3 -msse2  -Wno-unknown-pragmas -funroll-loops\
 	 -Iinclude -Idmlc-core/include -fPIC
 
 # specify tensor path
 .PHONY: clean all test lint doc
 
-
-all: lib/libnngraph.so test
+all: lib/libnngraph.so lib/libnngraph.a cli_test
 
 SRC = $(wildcard src/*.cc src/*/*.cc example/*.cc)
 ALL_OBJ = $(patsubst src/%.cc, build/%.o, $(SRC))
-ALL_DEP = $(ALL_OBJ)
+ALL_DEP = $(filter-out build/test_main.o, $(ALL_OBJ))
+
+include tests/cpp/unittest.mk
+
+test: $(TEST)
 
 build/%.o: src/%.cc
 	@mkdir -p $(@D)
@@ -21,7 +24,11 @@ lib/libnngraph.so: $(ALL_DEP)
 	@mkdir -p $(@D)
 	$(CXX) $(CFLAGS) -shared -o $@ $(filter %.o %.a, $^) $(LDFLAGS)
 
-test: $(ALL_DEP)
+lib/libnngraph.a: $(ALL_DEP)
+	@mkdir -p $(@D)
+	ar crv $@ $(filter %.o, $?)
+
+cli_test: $(ALL_DEP) build/test_main.o
 	$(CXX) $(CFLAGS)  -o $@ $(filter %.o %.a, $^) $(LDFLAGS)
 
 lint:
@@ -31,7 +38,7 @@ doc:
 	doxygen docs/Doxyfile
 
 clean:
-	$(RM) -rf build lib bin *~ */*~ */*/*~ */*/*/*~ */*.o */*/*.o */*/*/*.o test
+	$(RM) -rf build lib bin *~ */*~ */*/*~ */*/*/*~ */*.o */*/*.o */*/*/*.o cli_test
 
 -include build/*.d
 -include build/*/*.d

nnvm/tests/cpp/.gitignore

+unittest
+*.d
+*_test
\ No newline at end of file

nnvm/tests/cpp/op_test.cc

+#include <dmlc/logging.h>
+#include <gtest/gtest.h>
+#include <nngraph/op.h>
+#include <utility>
+
+NNGRAPH_REGISTER_OP(add)
+.describe("add two data together")
+.set_num_inputs(2)
+.attr("inplace_pair", std::make_pair(0, 0));
+
+NNGRAPH_REGISTER_OP(add)
+.attr<std::string>("nick_name", "plus");
+
+
+TEST(Op, GetAttr) {
+  using namespace nngraph;
+  auto add = Op::Get("add");
+  auto nick = Op::GetAttr<std::string>("nick_name");
+
+  CHECK_EQ(nick[add], "plus");
+}

nnvm/tests/cpp/tuple_test.cc

+#include <dmlc/logging.h>
+#include <gtest/gtest.h>
+#include <nngraph/tuple.h>
+
+TEST(Tuple, Basic) {
+  using nngraph::Tuple;
+  using nngraph::TShape;
+  Tuple<int> x{1, 2, 3};
+  Tuple<int> y{1, 2, 3, 5, 6};
+  x = std::move(y);
+
+  CHECK_EQ(x.ndim(), 5);
+  Tuple<int> z{1, 2, 3, 5, 6};
+  std::ostringstream os;
+  os << z;
+  CHECK_EQ(os.str(), "(1,2,3,5,6)");
+  std::istringstream is(os.str());
+  is >> y;
+  CHECK_EQ(x, y);
+  Tuple<nngraph::index_t> ss{1, 2, 3};
+  TShape s = ss;
+  s = std::move(ss);
+  CHECK((s == TShape{1, 2, 3}));
+}

nnvm/tests/cpp/unittest.mk

+GTEST_LIB=$(GTEST_PATH)/lib/
+GTEST_INC=$(GTEST_PATH)/include/
+
+TEST_SRC = $(wildcard tests/cpp/*_test.cc)
+TEST = $(patsubst tests/cpp/%_test.cc, tests/cpp/%_test, $(TEST_SRC))
+
+tests/cpp/%_test: tests/cpp/%_test.cc lib/libnngraph.a
+	$(CXX) -std=c++11 $(CFLAGS) -MM -MT tests/cpp/$* $< >tests/cpp/$*.d
+	$(CXX) -std=c++11 $(CFLAGS) -I$(GTEST_INC) -o $@ $(filter %.cc %.a, $^)  \
+		-L$(GTEST_LIB)  $(LDFLAGS) -lgtest -lgtest_main
+
+-include tests/cpp/*.d