4 files changed, 56 insertions, 0 deletions
diff --git a/src/03/Makefile b/src/03/Makefile
new file mode 100644
index 0000000..e87119a
--- /dev/null
+++ b/src/03/Makefile
@@ -0,0 +1,37 @@
+#!/usr/bin/make -f
+SHELL=/bin/sh
+
+CC=clang
+TEST_LIBS = -lcgreen
+
+BUILDDIR := build
+OBJS := $(addprefix $(BUILDDIR)/,avl_tree.o)
+TEST_OBJS := $(addprefix $(BUILDDIR)/,avl_tree_test.o)
+
+$(BUILDDIR)/%.o : %.c
+	$(COMPILE.c) $(OUTPUT_OPTION) $<
+
+.PHONY: all
+all: $(OBJS) $(BUILDDIR)/main.o
+	$(CC) $(OBJS) $(BUILDDIR)/main.o -o $(BUILDDIR)/program
+
+.PHONY: test
+test: $(OBJS) $(TEST_OBJS)
+	$(CC) $(OBJS) $(TEST_OBJS) $(TEST_LIBS) -o $(BUILDDIR)/test
+
+$(OBJS): | $(BUILDDIR)
+
+$(TEST_OBJS): | $(BUILDDIR)
+
+$(BUILDDIR):
+	mkdir $(BUILDDIR)
+
+.PHONY: clean
+clean:
+	rm -fr build
+
+run : all
+	./build/program
+
+run_test : test
+	cgreen-runner -c -v $(BUILDDIR)/test
diff --git a/src/03/avl_tree.c b/src/03/avl_tree.c
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/src/03/avl_tree.c
diff --git a/src/03/avl_tree.h b/src/03/avl_tree.h
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/src/03/avl_tree.h
diff --git a/src/03/avl_tree_test.c b/src/03/avl_tree_test.c
new file mode 100644
index 0000000..75902d3
--- /dev/null
+++ b/src/03/avl_tree_test.c
@@ -0,0 +1,19 @@
+#include "avl_tree.h"
+#include <cgreen/cgreen.h>
+#include <string.h>
+
+Ensure(initialize_returns_new_tree) {
+  assert_that(NULL, is_equal_to(NULL));
+}
+
+TestSuite *avl_tree_tests() {
+  TestSuite *suite = create_test_suite();
+  add_test(suite, initialize_returns_new_tree);
+  return suite;
+}
+
+int main(int argc, char **argv) {
+  TestSuite *suite = create_test_suite();
+  add_suite(suite, avl_tree_tests());
+  return run_test_suite(suite, create_text_reporter());
+}