feat(content): function signatures + test cases

backend/data/questions/base-7.yaml

@@ -9,6 +9,28 @@ categories:
 patterns:
   - greedy
 
+function_signature: "def convert_to_base7(num: int) -> str:"
+
+test_cases:
+  visible:
+    - input: { num: 100 }
+      expected: "202"
+    - input: { num: -7 }
+      expected: "-10"
+  hidden:
+    - input: { num: 0 }
+      expected: "0"
+    - input: { num: 7 }
+      expected: "10"
+    - input: { num: 1 }
+      expected: "1"
+    - input: { num: -1 }
+      expected: "-1"
+    - input: { num: 49 }
+      expected: "100"
+    - input: { num: -100 }
+      expected: "-202"
+
 description: |
   Given an integer `num`, return *a string of its **base 7** representation*.