Misc Changes

app/src/main/java/solutions/tretter/githugandroid/levels/FindOldBranchLevel.kt

@@ -0,0 +1,21 @@
+package solutions.tretter.githugandroid
+
+/**
+ * Port of the upstream ruby-githug `find_old_branch` level.
+ *
+ * Setup documents the repository shape the learner explores. Evaluation is kept
+ * state-based whenever the exercise changes repository objects; answer-only
+ * levels intentionally validate the answer entered at the prompt.
+ */
+internal fun findOldBranchLevel(): Level = level(
+    id = "find_old_branch",
+    title = "Find Old Branch",
+    description = "You have been working on a branch but got distracted by a major issue. Switch back to that branch even though you forgot the name of it.",
+    hints = listOf("Ever played with the `git reflog` command?"),
+    commandSuggestions = listOf("git checkout solve_world_hunger"),
+    setup = { RepoState(initialized = true, branches = mapOf("master" to 1, "solve_world_hunger" to 2)) },
+    validator = repoPredicate { repo -> repo.headBranch == "solve_world_hunger" },
+    testCases = listOf(
+        levelTestCase("checkout old branch", "git checkout solve_world_hunger"),
+    ),
+)