Added gtest based test cases to be executed after every compile

2 files changed, 52 insertions, 3 deletions

diff --git a/Makefile b/Makefile
index 34c4105..ac857b2 100644
--- a/Makefile
+++ b/Makefile
@@ -1,8 +1,13 @@
-LIB_FILES = tree.cpp parser.cpp
+LIB_FILES  = tree.cpp parser.cpp
 PROG_FILES = main.cpp
+TEST_FILES = test.cpp
 
-all: parser
+all: parser test
 
 parser:	$(PROG_FILES) $(LIB_FILES)
-	g++ -O2 -g -o parser $(PROG_FILES) $(LIB_FILES) 
+	g++ -O2 -g -o bin/parser $(PROG_FILES) $(LIB_FILES) 
+
+test: $(LIB_FILES) $(TEST_FILES)
+	g++ -o bin/test -lgtest $(LIB_FILES) $(TEST_FILES)
+	./bin/test
 
diff --git a/test.cpp b/test.cpp
new file mode 100644
index 0000000..2d0ef10
--- /dev/null
+++ b/test.cpp
@@ -0,0 +1,44 @@
+#include "parser.h"
+#include "gtest/gtest.h"
+
+class ParserTest : public ::testing::Test {
+
+};
+
+TEST_F(ParserTest, BasicCalc) {
+	Parser p;
+
+	EXPECT_EQ(4,  p.calculate("2+2", false).result);
+	EXPECT_EQ(0,  p.calculate("2-2", false).result);
+	EXPECT_EQ(42, p.calculate("21*2", false).result);
+	EXPECT_EQ(21, p.calculate("42/2", false).result);
+}
+
+TEST_F(ParserTest, OperatorPriority) {
+	Parser p;
+
+	EXPECT_EQ(10,    p.calculate("2+2*4", false).result);
+	EXPECT_EQ(4,     p.calculate("2+4/2", false).result);
+	EXPECT_EQ(42,    p.calculate("5+10*4-3", false).result);
+	EXPECT_EQ(17,    p.calculate("10+20/2-3", false).result);
+	EXPECT_EQ(261,   p.calculate("5+2^8", false).result);
+	EXPECT_EQ(32768, p.calculate("2*2^16/4", false).result);
+	EXPECT_EQ(32772, p.calculate("2*2^16/4+4", false).result);
+}
+
+TEST_F(ParserTest, BracketCalc) {
+	Parser p;
+
+	EXPECT_EQ(16,   p.calculate("(2+2)*4", false).result);
+	EXPECT_EQ(10,   p.calculate("2+(2*4)", false).result);
+	EXPECT_EQ(10,   p.calculate("(10-5)*(5-3)", false).result);
+	EXPECT_EQ(4,    p.calculate("((((2))*((2))))", false).result);
+	EXPECT_EQ(37,   p.calculate("(((5))*(((((3+2*2)))))+2)", false).result);
+	EXPECT_EQ(6.25, p.calculate("2.5*(2+3-(3/2+1))", false).result);
+}
+
+int main(int argc, char **argv) {
+	testing::InitGoogleTest(&argc, argv);
+
+	return RUN_ALL_TESTS();
+}