Fix "move patch into new commit" for partial hunk (#2507)

pkg/integration/tests/patch_building/move_to_later_commit.go

@@ -0,0 +1,89 @@
+package patch_building
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/config"
+	. "github.com/jesseduffield/lazygit/pkg/integration/components"
+)
+
+var MoveToLaterCommit = NewIntegrationTest(NewIntegrationTestArgs{
+	Description:  "Move a patch from a commit to a later commit",
+	ExtraCmdArgs: "",
+	Skip:         false,
+	SetupConfig:  func(config *config.AppConfig) {},
+	SetupRepo: func(shell *Shell) {
+		shell.CreateDir("dir")
+		shell.CreateFileAndAdd("dir/file1", "file1 content")
+		shell.CreateFileAndAdd("dir/file2", "file2 content")
+		shell.Commit("first commit")
+
+		shell.UpdateFileAndAdd("dir/file1", "file1 content with old changes")
+		shell.DeleteFileAndAdd("dir/file2")
+		shell.CreateFileAndAdd("dir/file3", "file3 content")
+		shell.Commit("commit to move from")
+
+		shell.CreateFileAndAdd("unrelated-file", "")
+		shell.Commit("destination commit")
+	},
+	Run: func(t *TestDriver, keys config.KeybindingConfig) {
+		t.Views().Commits().
+			Focus().
+			Lines(
+				Contains("destination commit").IsSelected(),
+				Contains("commit to move from"),
+				Contains("first commit"),
+			).
+			SelectNextItem().
+			PressEnter()
+
+		t.Views().CommitFiles().
+			IsFocused().
+			Lines(
+				Contains("dir").IsSelected(),
+				Contains("  M file1"),
+				Contains("  D file2"),
+				Contains("  A file3"),
+			).
+			PressPrimaryAction().
+			PressEscape()
+
+		t.Views().Information().Content(Contains("building patch"))
+
+		t.Views().Commits().
+			IsFocused().
+			SelectPreviousItem()
+
+		t.Common().SelectPatchOption(Contains("move patch to selected commit"))
+
+		t.Views().Commits().
+			IsFocused().
+			Lines(
+				Contains("destination commit").IsSelected(),
+				Contains("commit to move from"),
+				Contains("first commit"),
+			).
+			PressEnter()
+
+		t.Views().CommitFiles().
+			IsFocused().
+			Lines(
+				Contains("dir").IsSelected(),
+				Contains("  M file1"),
+				Contains("  D file2"),
+				Contains("  A file3"),
+				Contains("A unrelated-file"),
+			).
+			PressEscape()
+
+		t.Views().Commits().
+			IsFocused().
+			SelectNextItem().
+			PressEnter()
+
+		// the original commit has no more files in it
+		t.Views().CommitFiles().
+			IsFocused().
+			Lines(
+				Contains("(none)"),
+			)
+	},
+})