fix(compatibility): fix vim overwrite message and buffer clearing on exit (#98)

* fix(compatibility): fix vim overwrite message and buffer clearing on exit

* style(formatting): make rustfmt happy

7 files changed, 185 insertions, 0 deletions

diff --git a/src/tests/fixtures/clear_scroll_region b/src/tests/fixtures/clear_scroll_region
new file mode 100644
index 00000000..d4741364
--- /dev/null
+++ b/src/tests/fixtures/clear_scroll_region
diff --git a/src/tests/fixtures/vim_overwrite b/src/tests/fixtures/vim_overwrite
new file mode 100644
index 00000000..3a804d64
--- /dev/null
+++ b/src/tests/fixtures/vim_overwrite
diff --git a/src/tests/integration/compatibility.rs b/src/tests/integration/compatibility.rs
index 114c10d2..1df46583 100644
--- a/src/tests/integration/compatibility.rs
+++ b/src/tests/integration/compatibility.rs
@@ -260,3 +260,60 @@ pub fn htop_right_scrolling() {
         assert_snapshot!(snapshot);
     }
 }
+
+#[test]
+pub fn vim_overwrite() {
+    // this tests the vim overwrite message
+    // to recreate:
+    // * open a file in vim
+    // * open the same file in another window
+    // * change the file in the other window and save
+    // * change the file in the original vim window and save
+    // * confirm you would like to change the file by pressing 'y' and then ENTER
+    // * if everything looks fine, this test passed :)
+    let fake_win_size = PositionAndSize {
+        columns: 116,
+        rows: 28,
+        x: 0,
+        y: 0,
+    };
+    let fixture_name = "vim_overwrite";
+    let mut fake_input_output = get_fake_os_input(&fake_win_size, fixture_name);
+    fake_input_output.add_terminal_input(&[&COMMAND_TOGGLE, &COMMAND_TOGGLE, &QUIT]);
+    start(Box::new(fake_input_output.clone()), Opt::default());
+    let output_frames = fake_input_output
+        .stdout_writer
+        .output_frames
+        .lock()
+        .unwrap();
+    let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
+    for snapshot in snapshots {
+        assert_snapshot!(snapshot);
+    }
+}
+
+#[test]
+pub fn clear_scroll_region() {
+    // this tests the scroll region used by eg. vim is cleared properly
+    // this means that when vim exits, we get back the previous scroll
+    // buffer
+    let fake_win_size = PositionAndSize {
+        columns: 116,
+        rows: 28,
+        x: 0,
+        y: 0,
+    };
+    let fixture_name = "clear_scroll_region";
+    let mut fake_input_output = get_fake_os_input(&fake_win_size, fixture_name);
+    fake_input_output.add_terminal_input(&[&COMMAND_TOGGLE, &COMMAND_TOGGLE, &QUIT]);
+    start(Box::new(fake_input_output.clone()), Opt::default());
+    let output_frames = fake_input_output
+        .stdout_writer
+        .output_frames
+        .lock()
+        .unwrap();
+    let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
+    for snapshot in snapshots {
+        assert_snapshot!(snapshot);
+    }
+}
diff --git a/src/tests/integration/snapshots/mosaic__tests__integration__compatibility__clear_scroll_region-2.snap b/src/tests/integration/snapshots/mosaic__tests__integration__compatibility__clear_scroll_region-2.snap
new file mode 100644
index 00000000..8c309266
--- /dev/null
+++ b/src/tests/integration/snapshots/mosaic__tests__integration__compatibility__clear_scroll_region-2.snap
@@ -0,0 +1,32 @@
+---
+source: src/tests/integration/compatibility.rs
+expression: snapshot
+---
+⋊> ~/c/mosaic on main ⨯ vim some-file                                                                       15:07:22
+⋊> ~/c/mosaic on main ⨯                                                                                     15:07:29
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+Bye from Mosaic!█                                                                                                   
diff --git a/src/tests/integration/snapshots/mosaic__tests__integration__compatibility__clear_scroll_region.snap b/src/tests/integration/snapshots/mosaic__tests__integration__compatibility__clear_scroll_region.snap
new file mode 100644
index 00000000..3a7b2d5e
--- /dev/null
+++ b/src/tests/integration/snapshots/mosaic__tests__integration__compatibility__clear_scroll_region.snap
@@ -0,0 +1,32 @@
+---
+source: src/tests/integration/compatibility.rs
+expression: snapshot
+---
+Welcome to fish, the friendly interactive shell                                                                     
+⋊> ~/c/mosaic on main ⨯ vim some-file                                                                       15:07:22
+⋊> ~/c/mosaic on main ⨯ █                                                                                   15:07:29
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
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+                                                                                                                    
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+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
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+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
+                                                                                                                    
diff --git a/src/tests/integration/snapshots/mosaic__tests__integration__compatibility__vim_overwrite-2.snap b/src/tests/integration/snapshots/mosaic__tests__integration__compatibility__vim_overwrite-2.snap
new file mode 100644
index 00000000..7edfc74d
--- /dev/null
+++ b/src/tests/integration/snapshots/mosaic__tests__integration__compatibility__vim_overwrite-2.snap
@@ -0,0 +1,32 @@
+---
+source: src/tests/integration/compatibility.rs
+expression: snapshot
+---
+  1 line 1                                                                                                          
+  2 line 2                                                                                                          
+  3 line 3                                                                                                          
+  4 line 4                                                                                                          
+  5 line 5                                                                                                          
+  6 line 6                                                                                                          
+  7 line 7                                                                                                          
+  8 line 8                                                                                                          
+  9 line 9                                                                                                          
+ 10 line 10                                                                                                         
+ 11 line 11                                                                                                         
+ 12 line 12                                                                                                         
+ 13 line 13                                                                                                         
+ 14 line 14                                                                                                         
+ 15 line 15                                                                                                         
+ 16 line 16                                                                                                         
+ 17 line 17                                                                                                         
+ 18 line 18                                                                                                         
+ 19 line 19                                                                                                         
+ 20 line 20                                                                                                         
+ 21 line 21                                                                                                         
+ 22 line 22                                                                                                         
+ 23 line 23                                                                                                         
+ 24 line 24                                                                                                         
+ 25 line 25                                                                                                         
+ NORMAL  some-file                                                               unix | utf-8 | no ft    1%    1:1  
+                                                                                                                    
+Bye from Mosaic!█                                                                                                   
diff --git a/src/tests/integration/snapshots/mosaic__tests__integration__compatibility__vim_overwrite.snap b/src/tests/integration/snapshots/mosaic__tests__integration__compatibility__vim_overwrite.snap
new file mode 100644
index 00000000..406b5b31
--- /dev/null
+++ b/src/tests/integration/snapshots/mosaic__tests__integration__compatibility__vim_overwrite.snap
@@ -0,0 +1,32 @@
+---
+source: src/tests/integration/compatibility.rs
+expression: snapshot
+---
+1   █                                                                                                               
+  1 line 1                                                                                                          
+  2 line 2                                                                                                          
+  3 line 3                                                                                                          
+  4 line 4                                                                                                          
+  5 line 5                                                                                                          
+  6 line 6                                                                                                          
+  7 line 7                                                                                                          
+  8 line 8                                                                                                          
+  9 line 9                                                                                                          
+ 10 line 10                                                                                                         
+ 11 line 11                                                                                                         
+ 12 line 12                                                                                                         
+ 13 line 13                                                                                                         
+ 14 line 14                                                                                                         
+ 15 line 15                                                                                                         
+ 16 line 16                                                                                                         
+ 17 line 17                                                                                                         
+ 18 line 18                                                                                                         
+ 19 line 19                                                                                                         
+ 20 line 20                                                                                                         
+ 21 line 21                                                                                                         
+ 22 line 22                                                                                                         
+ 23 line 23                                                                                                         
+ 24 line 24                                                                                                         
+ 25 line 25                                                                                                         
+ NORMAL  some-file                                                               unix | utf-8 | no ft    1%    1:1  
+