Use doctest as test framework

Makefile

@@ -1,9 +1,8 @@
 include Makeconf
 
 emu-objs := $(addsuffix .o,$(modules))
-test-targets := $(patsubst %,tests/%.bin, $(tests))
-
-clean-objs := $(emu-objs) $(test-targets) libemu.a vgbc
+clean-objs := $(emu-objs) libemu.a vgbc vgbc.test
+test-srcs := $(wildcard tests/*.cpp)
 
 .PHONY: all test clean
 
@@ -12,15 +11,8 @@ all: vgbc $(test-targets)
 clean:
 	rm -rf $(clean-objs)
 
-test: $(test-targets)
-	@for test in $(tests); do \
-		if ./tests/$$test.bin; then \
-			echo "-- $$test successful"; \
-		else \
-			echo "-- $$test failed"; \
-			exit 1; \
-		fi \
-	done
+test: vgbc.test
+	@./$< -s
 
 %.o: %.cpp
 	g++ $(CXX_FLAGS) -c -o $@ $^
@@ -28,8 +20,8 @@ test: $(test-targets)
 libemu.a: $(emu-objs)
 	ar -rc $@ $^
 
-tests/%.bin: tests/%.cpp libemu.a
-	g++ $(CXX_FLAGS) -o $@ $^
-
 vgbc: main.c libemu.a
 	g++ $(CXX_FLAGS) -o $@ $^
+
+vgbc.test: $(test-srcs) libemu.a
+	g++ $(CXX_FLAGS) -o $@ $^