changelog: test parsing

src/changelog.rs

@@ -78,6 +78,9 @@ where
 mod tests {
     #[test]
     fn read_changelog() {
-        assert!(super::read("CHANGELOG.md".into(), "0.1.0".into()).is_ok());
+        let res = super::read("testdata/basic.md".into(), "0.1.0".into());
+        assert!(res.is_ok());
+        let delta = res.unwrap();
+        assert_eq!(delta, "Hi there this is a test\\!\n### ADDED\n  - something\n")
     }
 }

testdata/basic.md

@@ -0,0 +1,4 @@
+## 0.1.0
+Hi there this is a test!
+### ADDED
+- something