migrate diffing integration tests

pkg/integration/tests/diff/diff_commits.go

@@ -0,0 +1,56 @@
+package diff
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/config"
+	. "github.com/jesseduffield/lazygit/pkg/integration/components"
+)
+
+var DiffCommits = NewIntegrationTest(NewIntegrationTestArgs{
+	Description:  "View the diff between two commits",
+	ExtraCmdArgs: "",
+	Skip:         false,
+	SetupConfig:  func(config *config.AppConfig) {},
+	SetupRepo: func(shell *Shell) {
+		shell.CreateFileAndAdd("file1", "first line\n")
+		shell.Commit("first commit")
+		shell.UpdateFileAndAdd("file1", "first line\nsecond line\n")
+		shell.Commit("second commit")
+		shell.UpdateFileAndAdd("file1", "first line\nsecond line\nthird line\n")
+		shell.Commit("third commit")
+	},
+	Run: func(shell *Shell, input *Input, assert *Assert, keys config.KeybindingConfig) {
+		input.SwitchToCommitsWindow()
+		assert.CurrentViewName("commits")
+
+		assert.MatchSelectedLine(Contains("third commit"))
+
+		input.PressKeys(keys.Universal.DiffingMenu)
+		assert.InMenu()
+		assert.MatchCurrentViewTitle(Equals("Diffing"))
+		assert.MatchSelectedLine(Contains("diff"))
+		input.Confirm()
+		assert.NotInPopup()
+
+		assert.MatchViewContent("information", Contains("showing output for: git diff"))
+
+		input.NextItem()
+		input.NextItem()
+
+		assert.MatchSelectedLine(Contains("first commit"))
+
+		assert.MatchMainViewContent(Contains("-second line\n-third line"))
+
+		input.PressKeys(keys.Universal.DiffingMenu)
+		assert.InMenu()
+		input.NavigateToListItemContainingText("reverse diff direction")
+		input.Confirm()
+
+		assert.MatchMainViewContent(Contains("+second line\n+third line"))
+
+		input.Enter()
+
+		assert.CurrentViewName("commitFiles")
+		assert.MatchSelectedLine(Contains("file1"))
+		assert.MatchMainViewContent(Contains("+second line\n+third line"))
+	},
+})