Add tests.

test/CMakeLists.txt

@@ -1,5 +1,17 @@
-INCLUDE(CTest)
+SET(TESTS
+    "bmMenuNew"
+    )
 
-# TODO: write test CMakeLists
+INCLUDE_DIRECTORIES("${CMAKE_CURRENT_SOURCE_DIR}/../lib")
+FOREACH (test ${TESTS})
+    ADD_EXECUTABLE(${test}_test ${test}.c)
+    TARGET_LINK_LIBRARIES(${test}_test bemenu)
+
+    IF (WIN32)
+        ADD_TEST(${test}_test ${test}_test.exe)
+    ELSE ()
+        ADD_TEST(${test}_test ${test}_test)
+    ENDIF ()
+ENDFOREACH (test)
 
 # vim: set ts=8 sw=4 tw=0 :

test/bmMenuNew.c

@@ -0,0 +1,23 @@
+#include <stdlib.h>
+#include <bemenu.h>
+#include <assert.h>
+
+int main(int argc, char **argv)
+{
+    (void)argc, (void)argv;
+
+    // TEST: Instance bmMenu with all possible draw modes.
+    {
+        bmDrawMode i;
+        for (i = 0; i < BM_DRAW_MODE_LAST; ++i) {
+            bmMenu *menu = bmMenuNew(BM_DRAW_MODE_NONE);
+            assert(menu != NULL);
+            bmMenuRender(menu);
+            bmMenuFree(menu);
+        }
+    }
+
+    return EXIT_SUCCESS;
+}
+
+/* vim: set ts=8 sw=4 tw=0 :*/