requirements-dev.txt

@@ -2,3 +2,4 @@ black
 coverage
 pylint
 pytest
+requests-mock

tests/test_ip_info.py

@@ -2,6 +2,8 @@
 
 """MODULE: Provides test cases for app/ip_info.py."""
 
+import requests_mock
+
 from app.ip_info import (  # pragma: no cover
     get_ip_information,
     get_autonomous_system_number,
@@ -16,6 +18,15 @@ def test_get_ip_information() -> None:
     assert ip_info.get("status") == "success" and ip_info.get("query") == test_query
 
 
+def test_get_ip_information_broken_api() -> None:
+    """TEST: ensure that None is returned if the IP API response is broken."""
+    test_query = "1.2.3.4"
+    with requests_mock.Mocker() as mocker:
+        mocker.get(f"http://ip-api.com/json/{test_query}", text="error")
+        resp = get_ip_information(test_query)
+        assert not resp
+
+
 def test_get_autonomous_system_number() -> None:
     """TEST: ensure that AS information is parsed into AS number correctly."""
     as_info = "AS5089 Virgin Media Limited"
@@ -28,3 +39,15 @@ def test_get_prefix_information() -> None:
     autonomous_system = "AS109"
     prefixes = get_prefix_information(autonomous_system)
     assert "144.254.0.0/16" in prefixes
+
+
+def test_get_prefix_information_broken_api() -> None:
+    """TEST: ensure that None is returned if the prefix API response is broken."""
+    autonomous_system = "AS109"
+    with requests_mock.Mocker() as mocker:
+        mocker.get(
+            f"https://api.hackertarget.com/aslookup/?q={str(autonomous_system)}",
+            text="error",
+        )
+        resp = get_prefix_information(autonomous_system)
+        assert not resp