feat(content): function signatures + test cases

backend/data/questions/guess-number-higher-or-lower.yaml

@@ -8,6 +8,30 @@ categories:
 patterns:
   - binary-search
 
+function_signature: "def guess_number(n: int) -> int:"
+
+test_cases:
+  visible:
+    - input: { n: 10, pick: 6 }
+      expected: 6
+    - input: { n: 1, pick: 1 }
+      expected: 1
+    - input: { n: 2, pick: 1 }
+      expected: 1
+  hidden:
+    - input: { n: 2, pick: 2 }
+      expected: 2
+    - input: { n: 100, pick: 50 }
+      expected: 50
+    - input: { n: 100, pick: 1 }
+      expected: 1
+    - input: { n: 100, pick: 100 }
+      expected: 100
+    - input: { n: 1000000, pick: 999999 }
+      expected: 999999
+    - input: { n: 50, pick: 25 }
+      expected: 25
+
 description: |
   We are playing the Guess Game. The game is as follows: