Support setting the similarity threshold for detecting renames

pkg/integration/tests/diff/rename_similarity_threshold_change.go

@@ -0,0 +1,41 @@
+package diff
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/config"
+	. "github.com/jesseduffield/lazygit/pkg/integration/components"
+)
+
+var RenameSimilarityThresholdChange = NewIntegrationTest(NewIntegrationTestArgs{
+	Description:  "Change the rename similarity threshold while in the commits panel",
+	ExtraCmdArgs: []string{},
+	Skip:         false,
+	SetupConfig:  func(config *config.AppConfig) {},
+	SetupRepo: func(shell *Shell) {
+		shell.CreateFileAndAdd("original", "one\ntwo\nthree\nfour\nfive\n")
+		shell.Commit("add original")
+
+		shell.DeleteFileAndAdd("original")
+		shell.CreateFileAndAdd("renamed", "one\ntwo\nthree\nfour\nfive\nsix\nseven\neight\nnine\nten\n")
+		shell.Commit("change name and contents")
+	},
+	Run: func(t *TestDriver, keys config.KeybindingConfig) {
+		t.Views().Commits().Focus()
+
+		t.Views().Main().
+			ContainsLines(
+				Contains("2 files changed, 10 insertions(+), 5 deletions(-)"),
+			)
+
+		t.Views().Commits().
+			Press(keys.Universal.DecreaseRenameSimilarityThreshold).
+			Tap(func() {
+				t.ExpectToast(Equals("Changed rename similarity threshold to 45%"))
+			})
+
+		t.Views().Main().
+			ContainsLines(
+				Contains("original => renamed"),
+				Contains("1 file changed, 5 insertions(+)"),
+			)
+	},
+})