add test for downloading cleo in dev mode

opendut-carl/Cargo.toml

@@ -44,6 +44,7 @@ url = { workspace = true, features = ["serde"] }
 uuid = { workspace = true }
 
 [dev-dependencies]
+assert_fs = { workspace = true }
 async-trait = { workspace = true }
 rstest = { workspace = true }
 uuid = { workspace = true, features = ["v4"] }

opendut-carl/src/lib.rs

@@ -459,3 +459,36 @@ impl CleoArch {
         CLEO_ARCH.iter()
     }
 }
+
+#[cfg(test)]
+mod test {
+    use assert_fs::fixture::{FileTouch, PathChild};
+    use assert_fs::TempDir;
+    use axum::extract::Path;
+    use axum::response::IntoResponse;
+    use googletest::assert_that;
+    use googletest::matchers::eq;
+    use http::header;
+    use tracing::warn;
+    use crate::{CleoArch, download_cleo};
+
+    #[tokio::test()]
+    async fn download_cleo_development_succeeds() -> anyhow::Result<()> {
+        let temp = TempDir::new().unwrap();
+
+        let dir = temp.child("target/debug/opendut-cleo");
+        dir.touch().unwrap();
+
+        std::env::set_current_dir(&temp).unwrap_or_else(|_| warn!("Could not set back current directory to {}", temp.display()));
+
+        let cleo = download_cleo(Path(CleoArch::Development)).await;
+        let response = cleo.into_response();
+        let header = response.headers().get(header::CONTENT_DISPOSITION).unwrap();
+        let expected_header = format!("attachment; filename=\"{}\"", CleoArch::Development.file_name());
+        assert_that!(header.clone().to_str().unwrap(), eq(expected_header.as_str()));
+
+        Ok(())
+    }
+
+}
+