Initial test to run on GitHub Actions

.github/workflows/rust-ci.yml

@@ -0,0 +1,31 @@
+name: Rust CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Setup Rust
+      uses: actions-rs/toolchain@v1
+      with:
+        toolchain: stable
+        override: true
+    - name: Check
+      uses: actions-rs/cargo@v1
+      with:
+        command: check
+    - name: Test
+      uses: actions-rs/cargo@v1
+      with:
+        command: test

src/main.rs

@@ -394,3 +394,16 @@ fn main() {
         println!("    {:.1} {} of space taken by duplicates", val, suffix);
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_hash_file() {
+        let path = PathBuf::from("test_file.txt");
+        let (tx, _rx) = channel();
+        hash_file(false, 1024, path, tx); // This will fail if the file does not exist or cannot be read
+    }
+
+}