From a7ca2e169fed3ff3c53fc86f1a72588e8a6b5644 Mon Sep 17 00:00:00 2001
From: Gabor Szabo <gabor@szabgab.com>
Date: Sun, 9 Mar 2025 14:40:00 +0200
Subject: [PATCH] [test] error Couldn't open SUMMARY.md in load_book

---
 src/book/book.rs | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/book/book.rs b/src/book/book.rs
index c7150972..8c9d81d6 100644
--- a/src/book/book.rs
+++ b/src/book/book.rs
@@ -647,4 +647,19 @@ And here is some \
         let got = load_book_from_disk(&summary, temp.path());
         assert!(got.is_err());
     }
+
+    #[test]
+    fn cant_open_summary_md() {
+        let cfg = BuildConfig::default();
+        let temp_dir = TempFileBuilder::new().prefix("book").tempdir().unwrap();
+
+        let got = load_book(&temp_dir, &cfg);
+        assert!(got.is_err());
+        let error_message = got.err().unwrap().to_string();
+        let expeceted = format!(
+            r#"Couldn't open SUMMARY.md in "{}" directory"#,
+            temp_dir.path().display()
+        );
+        assert_eq!(error_message, expeceted);
+    }
 }