Add a few simple integration tests

tests/helpers.rs

@@ -0,0 +1,11 @@
+use tempdir::TempDir;
+
+pub fn init_tmpdir() -> TempDir {
+    let tmp_dir = TempDir::new("grm-test").unwrap();
+    println!("Temporary directory: {}", tmp_dir.path().display());
+    tmp_dir
+}
+
+pub fn cleanup_tmpdir(tempdir: TempDir) {
+    tempdir.close().unwrap();
+}

tests/repo.rs

@@ -0,0 +1,43 @@
+use grm::repo::*;
+
+mod helpers;
+
+use helpers::*;
+
+#[test]
+fn open_empty_repo() {
+    let tmpdir = init_tmpdir();
+    assert!(matches!(
+        open_repo(tmpdir.path(), true),
+        Err(RepoError {
+            kind: RepoErrorKind::NotFound
+        })
+    ));
+    assert!(matches!(
+        open_repo(tmpdir.path(), false),
+        Err(RepoError {
+            kind: RepoErrorKind::NotFound
+        })
+    ));
+    cleanup_tmpdir(tmpdir);
+}
+
+#[test]
+fn create_repo() -> Result<(), Box<dyn std::error::Error>> {
+    let tmpdir = init_tmpdir();
+    let repo = init_repo(tmpdir.path(), false)?;
+    assert!(!repo.is_bare());
+    assert!(repo.is_empty()?);
+    cleanup_tmpdir(tmpdir);
+    Ok(())
+}
+
+#[test]
+fn create_repo_with_worktree() -> Result<(), Box<dyn std::error::Error>> {
+    let tmpdir = init_tmpdir();
+    let repo = init_repo(tmpdir.path(), true)?;
+    assert!(repo.is_bare());
+    assert!(repo.is_empty()?);
+    cleanup_tmpdir(tmpdir);
+    Ok(())
+}