AFL_NO_CFG_FUZZING test added

cargo-afl/Cargo.toml

@@ -36,3 +36,4 @@ tempfile = "3.8"
 [features]
 default = []
 plugins = []
+fuzzing = []

cargo-afl/src/fuzz.rs

@@ -0,0 +1,6 @@
+fn main() {
+    if !cfg!(fuzzing) {
+        panic!("Crash because fuzzing is not set. ");
+    }
+    println!("Running Normally");
+}

cargo-afl/tests/fuzz_test.rs

@@ -0,0 +1,12 @@
+#[cfg(test)]
+mod tests {
+    use assert_cmd::Command;
+
+    #[test]
+    fn test_fuzz(){
+        let mut cmd = Command::cargo_bin("fuzz").unwrap();
+        cmd.env("RUSTFLAGS", "-C passes=sancov -Zsanitizer=address");
+        let output = cmd.unwrap();
+        assert!(output.status.success());
+    }
+}