feat: add tests for git setup

Signed-off-by: kjuulh <contact@kjuulh.io>

crates/cuddle-please/tests/common/mod.rs

@@ -2,6 +2,7 @@ use cuddle_please::ui::{DynUi, Ui};
 
 use std::{
     io::Write,
+    path::PathBuf,
     sync::{Arc, Mutex},
 };
 
@@ -111,3 +112,17 @@ impl From<&BufferUi> for DynUi {
         value.clone().into()
     }
 }
+
+pub fn assert_output(ui: &BufferUi, expected_stdout: &str, expected_stderr: &str) {
+    let (stdout, stderr) = ui.get_output();
+
+    assert_eq!(expected_stdout, &stdout);
+    assert_eq!(expected_stderr, &stderr);
+}
+
+pub fn get_test_data_path(item: &str) -> PathBuf {
+    std::env::current_dir()
+        .ok()
+        .map(|p| p.join("testdata").join(item))
+        .unwrap()
+}