Prefer temp dir for integration test

.gitignore

@@ -8,5 +8,3 @@ packaged/
 *.cnb
 
 .DS_Store
-
-.integration-test-static-artifacts-storage/

buildpacks/release-phase/Cargo.toml

@@ -18,5 +18,6 @@ toml = { version = "0.8", features = ["preserve_order"] }
 
 [dev-dependencies]
 libcnb-test = { git = "https://github.com/mars/libcnb.rs.git", branch = "docker-volume" }
+tempfile = "3"
 test_support.workspace = true
 uuid = { version = "1.10.0", features = ["v4", "serde"] }

buildpacks/release-phase/src/main.rs

@@ -17,6 +17,8 @@ use setup_release_phase::setup_release_phase;
 #[cfg(test)]
 use libcnb_test as _;
 #[cfg(test)]
+use tempfile as _;
+#[cfg(test)]
 use test_support as _;
 #[cfg(test)]
 use uuid as _;

buildpacks/release-phase/tests/integration_test.rs

@@ -1,9 +1,8 @@
 // Required due to: https://github.com/rust-lang/rust/issues/95513
 #![allow(unused_crate_dependencies)]
 
-use std::fs::{self, create_dir};
-
 use libcnb_test::{assert_contains, ContainerConfig};
+use tempfile::tempdir;
 use test_support::{
     release_phase_and_procfile_integration_test, release_phase_integration_test,
     start_container_entrypoint,
@@ -68,8 +67,8 @@ fn project_uses_release_build_and_web_process_loads_artifacts() {
         "./fixtures/project_uses_release_build_with_web_process",
         |ctx| {
             let unique = Uuid::new_v4();
-            let local_storage_path = "./.integration-test-static-artifacts-storage";
-            create_dir(local_storage_path).unwrap();
+            let local_storage_tmp_dir = tempdir().unwrap();
+            let local_storage_path = local_storage_tmp_dir.path().to_str().unwrap();
             let container_volume_path = "/workspace/static-artifacts-storage";
             let container_volume_url = "file://".to_owned() + container_volume_path;
             let volume = local_storage_path.to_owned() + ":" + container_volume_path;
@@ -113,8 +112,6 @@ fn project_uses_release_build_and_web_process_loads_artifacts() {
                     assert_contains!(log_output.stdout, "Hello static world!");
                 },
             );
-            fs::remove_file(format!("{local_storage_path}/release-{unique}.tgz"))
-                .expect("the generated test archive can be deleted");
         },
     );
 }