test for the Repository::config() function (#651)

* test for verifying that the Repository::config() function returns a config object that have the local repo as highest prio

* used the test::repo_init() helper method instead

Author: alexanderkjall

src/repo.rs

@@ -3621,4 +3621,22 @@ mod tests {
         // reverting twice restores `foo` file
         assert!(foo_file.exists());
     }
+
+    #[test]
+    fn smoke_config_write_and_read() {
+        let (td, repo) = crate::test::repo_init();
+
+        let mut config = repo.config().unwrap();
+
+        config.set_bool("commit.gpgsign", false).unwrap();
+
+        let c = fs::read_to_string(td.path().join(".git").join("config")).unwrap();
+
+        assert!(c.contains("[commit]"));
+        assert!(c.contains("gpgsign = false"));
+
+        let config = repo.config().unwrap();
+
+        assert!(!config.get_bool("commit.gpgsign").unwrap());
+    }
 }