Add test demonstrating problem with dropping stashes in filtering mode

As can be seen from the test, it deletes the wrong stashes in this case, because
it assumes the selection is contiguous.

pkg/integration/tests/stash/drop_multiple_in_filtered_mode.go

@@ -0,0 +1,81 @@
+package stash
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/config"
+	. "github.com/jesseduffield/lazygit/pkg/integration/components"
+)
+
+var DropMultipleInFilteredMode = NewIntegrationTest(NewIntegrationTestArgs{
+	Description:  "Drop multiple stash entries when filtering by path",
+	ExtraCmdArgs: []string{},
+	Skip:         false,
+	SetupConfig:  func(config *config.AppConfig) {},
+	SetupRepo: func(shell *Shell) {
+		shell.EmptyCommit("initial commit")
+		shell.CreateFileAndAdd("file1", "content1")
+		shell.Stash("stash one")
+		shell.CreateFileAndAdd("file2", "content2a")
+		shell.Stash("stash two-a")
+		shell.CreateFileAndAdd("file3", "content3")
+		shell.Stash("stash three")
+		shell.CreateFileAndAdd("file2", "content2b")
+		shell.Stash("stash two-b")
+		shell.CreateFileAndAdd("file4", "content4")
+		shell.Stash("stash four")
+	},
+	Run: func(t *TestDriver, keys config.KeybindingConfig) {
+		t.Views().Stash().
+			Lines(
+				Contains("stash four"),
+				Contains("stash two-b"),
+				Contains("stash three"),
+				Contains("stash two-a"),
+				Contains("stash one"),
+			)
+
+		t.GlobalPress(keys.Universal.FilteringMenu)
+		t.ExpectPopup().Menu().
+			Title(Equals("Filtering")).
+			Select(Contains("Enter path to filter by")).
+			Confirm()
+
+		t.ExpectPopup().Prompt().
+			Title(Equals("Enter path:")).
+			Type("file2").
+			Confirm()
+
+		t.Views().Stash().
+			Focus().
+			Lines(
+				Contains("stash two-b").IsSelected(),
+				Contains("stash two-a"),
+			).
+			Press(keys.Universal.RangeSelectDown).
+			Press(keys.Universal.Remove).
+			Tap(func() {
+				t.ExpectPopup().Confirmation().
+					Title(Equals("Stash drop")).
+					Content(Contains("Are you sure you want to drop the selected stash entry(ies)?")).
+					Confirm()
+			}).
+			/* EXPECTED:
+			IsEmpty()
+			ACTUAL: */
+			Lines(
+				Contains("stash two-a"),
+			)
+
+		t.GlobalPress(keys.Universal.Return) // cancel filtering mode
+		t.Views().Stash().
+			Lines(
+				/* EXPECTED:
+				Contains("stash four"),
+				Contains("stash three"),
+				Contains("stash one"),
+				ACTUAL: */
+				Contains("stash four"),
+				Contains("stash two-a"),
+				Contains("stash one"),
+			)
+	},
+})

pkg/integration/tests/test_list.go

@@ -358,6 +358,7 @@ var tests = []*components.IntegrationTest{
 	stash.CreateBranch,
 	stash.Drop,
 	stash.DropMultiple,
+	stash.DropMultipleInFilteredMode,
 	stash.FilterByPath,
 	stash.Pop,
 	stash.PreventDiscardingFileChanges,