Add integration test for ignoring whitespace in diff

pkg/integration/tests/diff/ignore_whitespace.go

@@ -0,0 +1,33 @@
+package diff
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/config"
+	. "github.com/jesseduffield/lazygit/pkg/integration/components"
+)
+
+var IgnoreWhitespace = NewIntegrationTest(NewIntegrationTestArgs{
+	Description:  "View diff with and without ignoring whitespace",
+	ExtraCmdArgs: "",
+	Skip:         false,
+	SetupConfig:  func(config *config.AppConfig) {},
+	SetupRepo: func(shell *Shell) {
+		shell.CreateFileAndAdd("file1", "first line\nsecond line\n")
+		shell.Commit("first commit")
+		// First line has a real change, second line changes only indentation:
+		shell.UpdateFileAndAdd("file1", "first line changed\n  second line\n")
+		shell.Commit("second commit")
+	},
+	Run: func(t *TestDriver, keys config.KeybindingConfig) {
+		t.Views().Commits().
+			Focus().
+			Tap(func() {
+				// By default, both changes are shown in the diff:
+				t.Views().Main().Content(Contains("-first line\n-second line\n+first line changed\n+  second line\n"))
+			}).
+			Press(keys.Universal.ToggleWhitespaceInDiffView).
+			Tap(func() {
+				// After enabling ignore whitespace, only the real change remains:
+				t.Views().Main().Content(Contains("-first line\n+first line changed\n"))
+			})
+	},
+})

pkg/integration/tests/tests.go

@@ -68,6 +68,7 @@ var tests = []*components.IntegrationTest{
 	diff.Diff,
 	diff.DiffAndApplyPatch,
 	diff.DiffCommits,
+	diff.IgnoreWhitespace,
 	sync.FetchPrune,
 	sync.RenameBranchAndPull,
 	filter_by_path.CliArg,