refactor: run tests in CI with different temporary directory

Signed-off-by: James Rhodes <jarhodes314@gmail.com>

Author: jarhodes314

.github/workflows/build-workflow.yml

@@ -74,8 +74,13 @@ jobs:
       - name: cargo install cargo-llvm-cov
         uses: taiki-e/install-action@cargo-llvm-cov
 
+      - name: Create dir for temporary files
+        run: sudo mkdir /mnt/test-tmp && sudo chmod 777 /mnt/test-tmp
+
       - name: cargo llvm-cov
         run: cargo llvm-cov nextest --no-fail-fast --locked --all-features --all-targets --codecov --output-path codecov.json
+        env:
+          TEMP_DIR_ROOT: /mnt/test-tmp
 
       # https://github.com/rust-lang/cargo/issues/6669
       - name: cargo test --doc

crates/tests/tedge_test_utils/src/fs.rs

@@ -21,7 +21,11 @@ pub struct TempTedgeFile {
 
 impl Default for TempTedgeDir {
     fn default() -> Self {
-        let temp_dir = TempDir::new().unwrap();
+        let temp_dir = if let Ok(dir) = std::env::var("TEMP_DIR_ROOT") {
+            TempDir::new_in(dir).unwrap()
+        } else {
+            TempDir::new().unwrap()
+        };
         let current_file_path = Utf8Path::from_path(temp_dir.path()).unwrap().to_owned();
         TempTedgeDir {
             temp_dir: Arc::new(temp_dir),