1 files changed, 27 insertions, 0 deletions
diff --git a/tests/test_undef.sh b/tests/test_undef.sh
new file mode 100644
index 0000000..34c3dad
--- /dev/null
+++ b/tests/test_undef.sh
@@ -0,0 +1,27 @@
+cat <<'EOF' > expected
+A is defined
+A is undefined
+EOF
+
+test_diff <<'EOF'
+int printf();
+
+int main() {
+#define A 1
+
+#ifdef A
+    printf("A is defined\n");
+#else
+    printf("A is undefined\n");
+#endif
+
+#undef A
+
+#ifdef A
+    printf("A is defined\n");
+#else
+    printf("A is undefined\n");
+#endif
+}
+EOF
+