Verify that plugins are available in integration_maze test

Author: smoelius

cargo-afl/tests/integration.rs

@@ -1,8 +1,13 @@
 use std::{
+    io::Write,
     path,
     process::{self, ExitStatus},
 };
 
+#[allow(dead_code)]
+#[path = "../src/common.rs"]
+mod common;
+
 fn target_dir_path() -> &'static path::Path {
     if path::Path::new("../target/debug/cargo-afl").exists() {
         path::Path::new("../target/debug/")
@@ -56,6 +61,15 @@ fn integration_cfg() {
 
 #[test]
 fn integration_maze() {
+    if !common::plugins_available().unwrap_or_default() {
+        writeln!(
+            std::io::stderr(),
+            "Skipping `integration_maze` test as plugins are unavailable"
+        )
+        .unwrap();
+        return;
+    }
+
     assert_cmd::Command::new(cargo_afl_path())
         .arg("afl")
         .arg("build")