[wip] add test

pkg/integration/tests/branch/squash.go

@@ -0,0 +1,43 @@
+package branch
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/config"
+	. "github.com/jesseduffield/lazygit/pkg/integration/components"
+	"github.com/jesseduffield/lazygit/pkg/integration/tests/shared"
+)
+
+var Squash = NewIntegrationTest(NewIntegrationTestArgs{
+	Description:  "Squash a branch in the working tree",
+	ExtraCmdArgs: []string{},
+	Skip:         false,
+	SetupConfig:  func(config *config.AppConfig) {},
+	SetupRepo: func(shell *Shell) {
+		shared.CreateMergeCommit(shell)
+	},
+	Run: func(t *TestDriver, keys config.KeybindingConfig) {
+		t.Views().Commits().TopLines(
+			Contains("first change"),
+			Contains("original"),
+		)
+
+		t.Views().Branches().
+			Focus().
+			Lines(
+				Contains("change-branch"),
+				Contains("original-branch"),
+			).
+			SelectNextItem().
+			Press(keys.Branches.SquashBranch)
+
+		t.ExpectPopup().Menu().
+			Title(Equals("Squash")).
+			Select(Contains("Squash files in a new commit")).
+			Confirm()
+
+		t.Views().Commits().TopLines(
+			Contains("Squash branch change-branch into original-branch"),
+			Contains("first change"),
+			Contains("original"),
+		)
+	},
+})