From 842c93568b2b658ef5da285eb7c4b22d8d1c5a79 Mon Sep 17 00:00:00 2001
From: Jon Janzen <jonjanzen@me.com>
Date: Fri, 5 Mar 2021 17:32:47 -0700
Subject: [PATCH] assert new line at end of ppm

---
 canvas/src/lib.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/canvas/src/lib.rs b/canvas/src/lib.rs
index eaa1403..a8aa2e5 100644
--- a/canvas/src/lib.rs
+++ b/canvas/src/lib.rs
@@ -154,4 +154,11 @@ mod tests {
         let four_to_seven = ppm.split("\n").skip(3).collect::<Vec<&str>>().join("\n");
         assert_eq!(line4_7, four_to_seven);
     }
+
+    #[test]
+    fn ends_with_newline() {
+        let c = Canvas::new(5, 3);
+        let mut ppm = c.to_ppm();
+        assert_eq!(Some('\n'), ppm.pop());
+    }
 }