Misc Changes

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

@@ -0,0 +1,22 @@
+package solutions.tretter.githugandroid
+
+/**
+ * Port of the upstream ruby-githug `branch_at` 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 branchAtLevel(): Level = level(
+    id = "branch_at",
+    title = "Branch At",
+    description = "You forgot to branch at the previous commit and made a commit on top of it. Create the branch test_branch at the commit before the last.",
+    hints = listOf("Just like creating a branch, but you have to pass an extra argument."),
+    commandSuggestions = listOf("git branch test_branch HEAD~1"),
+    setup = { RepoState(initialized = true, commits = listOf(CommitNode("1", "Adding file1"), CommitNode("2", "Updating file1"), CommitNode("3", "Updating file1 again")), branches = mapOf("master" to 3)) },
+    validator = repoPredicate { repo -> repo.branches["test_branch"] == 2 },
+    testCases = listOf(
+        levelTestCase("branch at previous commit", "git branch test_branch HEAD~1"),
+        levelTestCase("branch at caret", "git branch test_branch HEAD^"),
+    ),
+)