From 0be897d5acd7c4cf5afb60a44caa3c473093cc25 Mon Sep 17 00:00:00 2001
From: Nathan Sobo <nathan@zed.dev>
Date: Sat, 4 Dec 2021 07:19:30 -0700
Subject: [PATCH] WIP: Edit one of the excerpted buffers and add an assertion

We'll need to detect edits on the child buffers and understand their impact on the tree.
---
 crates/language/src/fragment_list.rs | 31 +++++++++++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/crates/language/src/fragment_list.rs b/crates/language/src/fragment_list.rs
index deef5570a9..725e628a1d 100644
--- a/crates/language/src/fragment_list.rs
+++ b/crates/language/src/fragment_list.rs
@@ -286,6 +286,35 @@ mod tests {
                 "\n",      //
                 "jj"       //
             )
-        )
+        );
+
+        buffer_1.update(cx, |buffer, cx| {
+            buffer.edit(
+                [
+                    Point::new(0, 0)..Point::new(0, 0),
+                    Point::new(2, 1)..Point::new(2, 2),
+                ],
+                "\n",
+                cx,
+            );
+        });
+
+        assert_eq!(
+            list.read(cx).text(),
+            concat!(
+                "\n",     // Preserve newlines
+                "\n",     //
+                "bbbb\n", //
+                "c\n",    //
+                "ccc\n",  //
+                "\n",     //
+                "ddd\n",  //
+                "eeee\n", //
+                "\n",     //
+                "\n",     //
+                "\n",     //
+                "jj"      //
+            )
+        );
     }
 }