Add custom command demo

pkg/integration/tests/demo/custom_command.go

@@ -0,0 +1,78 @@
+package demo
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/config"
+	. "github.com/jesseduffield/lazygit/pkg/integration/components"
+)
+
+var customCommandContent = `
+customCommands:
+  - key: 'a'
+    command: 'git checkout {{.Form.Branch}}'
+    context: 'localBranches'
+    prompts:
+    - type: 'input'
+      title: 'Enter a branch name to checkout:'
+      key: 'Branch'
+			suggestions:
+				preset: 'branches'
+`
+
+var CustomCommand = NewIntegrationTest(NewIntegrationTestArgs{
+	Description:  "Invoke a custom command",
+	ExtraCmdArgs: []string{},
+	Skip:         false,
+	IsDemo:       true,
+	SetupConfig: func(cfg *config.AppConfig) {
+		// No idea why I had to use version 2: it should be using my own computer's
+		// font and the one iterm uses is version 3.
+		cfg.UserConfig.Gui.NerdFontsVersion = "2"
+
+		cfg.UserConfig.CustomCommands = []config.CustomCommand{
+			{
+				Key:     "a",
+				Context: "localBranches",
+				Command: `git checkout {{.Form.Branch}}`,
+				Prompts: []config.CustomCommandPrompt{
+					{
+						Key:   "Branch",
+						Type:  "input",
+						Title: "Enter a branch name to checkout",
+						Suggestions: config.CustomCommandSuggestions{
+							Preset: "branches",
+						},
+					},
+				},
+			},
+		}
+	},
+	SetupRepo: func(shell *Shell) {
+		shell.CreateNCommitsWithRandomMessages(30)
+		shell.NewBranch("feature/user-authentication")
+		shell.NewBranch("feature/payment-processing")
+		shell.NewBranch("feature/search-functionality")
+		shell.NewBranch("feature/mobile-responsive")
+		shell.EmptyCommit("Make mobile response")
+		shell.NewBranch("bugfix/fix-login-issue")
+		shell.HardReset("HEAD~1")
+		shell.NewBranch("bugfix/fix-crash-bug")
+		shell.CreateFile("custom_commands_example.yml", customCommandContent)
+	},
+	Run: func(t *TestDriver, keys config.KeybindingConfig) {
+		t.SetCaptionPrefix("Invoke a custom command")
+		t.Wait(1500)
+
+		t.Views().Branches().
+			Focus().
+			Wait(500).
+			Press("a").
+			Tap(func() {
+				t.Wait(500)
+
+				t.ExpectPopup().Prompt().
+					Title(Equals("Enter a branch name to checkout")).
+					Type("mobile").
+					ConfirmFirstSuggestion()
+			})
+	},
+})