Extract test helper function checkRemoteBranches

We'll need it a few more times in the next test we add.

pkg/integration/tests/branch/shared.go

@@ -0,0 +1,25 @@
+package branch
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/config"
+	. "github.com/jesseduffield/lazygit/pkg/integration/components"
+	"github.com/samber/lo"
+)
+
+func checkRemoteBranches(t *TestDriver, keys config.KeybindingConfig, remoteName string, expectedBranches []string) {
+	t.Views().Remotes().
+		Focus().
+		NavigateToLine(Contains(remoteName)).
+		PressEnter()
+
+	t.Views().
+		RemoteBranches().
+		Lines(
+			lo.Map(expectedBranches, func(branch string, _ int) *TextMatcher { return Equals(branch) })...,
+		).
+		Press(keys.Universal.Return)
+
+	t.Views().
+		Branches().
+		Focus()
+}