Fix stale main view content when entering/exiting filtering view

When entering filtering we would only call FocusLine, which takes care of
highlighting the selected line in the commits list, but not of re-rendering the
main view. HandleFocus does that.

When exiting filtering, the HandleFocus call was missing entirely.

The tests needed to be reworked a little bit to make this testable.

pkg/gui/controllers/filtering_menu_action.go

@@ -124,7 +124,7 @@ func (self *FilteringMenuAction) setFiltering() error {
 
 	self.c.Refresh(types.RefreshOptions{Scope: []types.RefreshableView{types.COMMITS}, Then: func() {
 		self.c.Contexts().LocalCommits.SetSelection(0)
-		self.c.Contexts().LocalCommits.FocusLine()
+		self.c.Contexts().LocalCommits.HandleFocus(types.OnFocusOpts{})
 	}})
 
 	return nil

pkg/gui/controllers/helpers/mode_helper.go

@@ -178,6 +178,7 @@ func (self *ModeHelper) ClearFiltering() error {
 				// before we entered filtering
 				self.c.Contexts().LocalCommits.SelectCommitByHash(self.c.Modes().Filtering.GetSelectedCommitHash())
 			}
+			self.c.Contexts().LocalCommits.HandleFocus(types.OnFocusOpts{})
 		},
 	})
 	return nil

pkg/integration/tests/filter_by_path/keep_same_commit_selected_on_exit.go

@@ -19,9 +19,9 @@ var KeepSameCommitSelectedOnExit = NewIntegrationTest(NewIntegrationTestArgs{
 			Focus().
 			Lines(
 				Contains(`none of the two`).IsSelected(),
-				Contains(`only filterFile`),
-				Contains(`only otherFile`),
 				Contains(`both files`),
+				Contains(`only otherFile`),
+				Contains(`only filterFile`),
 			).Press(keys.Universal.FilteringMenu).
 			Tap(func() {
 				t.ExpectPopup().Menu().
@@ -36,16 +36,33 @@ var KeepSameCommitSelectedOnExit = NewIntegrationTest(NewIntegrationTestArgs{
 					ConfirmFirstSuggestion()
 			}).
 			Lines(
-				Contains(`only filterFile`).IsSelected(),
+				Contains(`both files`).IsSelected(),
-				Contains(`both files`),
+				Contains(`only filterFile`),
 			).
-			SelectNextItem().
+			Tap(func() {
+				t.Views().Main().
+					ContainsLines(
+						Equals("    both files"),
+						Equals("---"),
+						Equals(" filterFile | 2 +-"),
+						Equals(" 1 file changed, 1 insertion(+), 1 deletion(-)"),
+					)
+			}).
 			PressEscape().
 			Lines(
 				Contains(`none of the two`),
-				Contains(`only filterFile`),
-				Contains(`only otherFile`),
 				Contains(`both files`).IsSelected(),
+				Contains(`only otherFile`),
+				Contains(`only filterFile`),
+			)
+
+		t.Views().Main().
+			ContainsLines(
+				Equals("    both files"),
+				Equals("---"),
+				Equals(" filterFile | 2 +-"),
+				Equals(" otherFile  | 2 +-"),
+				Equals(" 2 files changed, 2 insertions(+), 2 deletions(-)"),
 			)
 	},
 })

pkg/integration/tests/filter_by_path/select_file.go

@@ -19,22 +19,25 @@ var SelectFile = NewIntegrationTest(NewIntegrationTestArgs{
 			Focus().
 			Lines(
 				Contains(`none of the two`).IsSelected(),
-				Contains(`only filterFile`),
-				Contains(`only otherFile`),
 				Contains(`both files`),
+				Contains(`only otherFile`),
+				Contains(`only filterFile`),
 			).
-			NavigateToLine(Contains(`only filterFile`)).
+			NavigateToLine(Contains(`both files`)).
 			PressEnter()
 
-		// when you click into the commit itself, you see all files from that commit
 		t.Views().CommitFiles().
 			IsFocused().
 			Lines(
-				Contains(`filterFile`).IsSelected(),
+				Equals(`▼ /`).IsSelected(),
+				Equals(`  M filterFile`),
+				Equals(`  M otherFile`),
 			).
+			SelectNextItem().
 			Press(keys.Universal.FilteringMenu)
 
-		t.ExpectPopup().Menu().Title(Equals("Filtering")).Select(Contains("Filter by 'filterFile'")).Confirm()
+		t.ExpectPopup().Menu().Title(Equals("Filtering")).
+			Select(Contains("Filter by 'filterFile'")).Confirm()
 
 		postFilterTest(t)
 	},

pkg/integration/tests/filter_by_path/shared.go

@@ -6,14 +6,13 @@ import (
 
 func commonSetup(shell *Shell) {
 	shell.CreateFileAndAdd("filterFile", "original filterFile content")
+	shell.Commit("only filterFile")
 	shell.CreateFileAndAdd("otherFile", "original otherFile content")
-	shell.Commit("both files")
-
-	shell.UpdateFileAndAdd("otherFile", "new otherFile content")
 	shell.Commit("only otherFile")
 
+	shell.UpdateFileAndAdd("otherFile", "new otherFile content")
 	shell.UpdateFileAndAdd("filterFile", "new filterFile content")
-	shell.Commit("only filterFile")
+	shell.Commit("both files")
 
 	shell.EmptyCommit("none of the two")
 }
@@ -24,14 +23,18 @@ func postFilterTest(t *TestDriver) {
 	t.Views().Commits().
 		IsFocused().
 		Lines(
-			Contains(`only filterFile`).IsSelected(),
+			Contains(`both files`).IsSelected(),
-			Contains(`both files`),
+			Contains(`only filterFile`),
-		).
+		)
-		SelectNextItem()
 
 	// we only show the filtered file's changes in the main view
 	t.Views().Main().
-		Content(Contains("filterFile").DoesNotContain("otherFile"))
+		ContainsLines(
+			Equals("    both files"),
+			Equals("---"),
+			Equals(" filterFile | 2 +-"),
+			Equals(" 1 file changed, 1 insertion(+), 1 deletion(-)"),
+		)
 
 	t.Views().Commits().
 		PressEnter()