Add script for comparing to deployed versions of the API

scripts/compare_apis.py

@@ -0,0 +1,97 @@
+"""
+Script for comparing API deployed in test and prod.
+
+The old Flask-based API includes whitespace and trailing newline in the response.
+We knowingly strip that for the sake of comparison. If this affects users, they're
+parsing the data in a bad way.
+If necessary, the old ways can be introduced in FastAPI as well using a response_class.
+
+For more, see:
+https://stackoverflow.com/questions/67783530/is-there-a-way-to-pretty-print-prettify-a-json-response-in-fastapi
+"""
+import json
+
+import requests
+
+TOKEN = "8051bfcbe3b04250f4239d7379eb5a52"
+
+URL_TEST = "https://api.dataforsyningen.dk/rest/webproj_test/"
+URL_PROD = "https://api.dataforsyningen.dk/rest/webproj/"
+
+TEST_CASES = [
+    "v1.0/crs/",
+    "v1.1/crs/",
+    "v1.2/crs/",
+
+    "v1.0/crs/EPSG:4093",
+    "v1.1/crs/EPSG:4093",
+    "v1.2/crs/EPSG:4093",
+
+    "v1.0/trans/EPSG:4258/EPSG:25832/12.0,56.0",
+    "v1.1/trans/EPSG:4258/EPSG:25832/12.0,56.0",
+    "v1.2/trans/EPSG:4258/EPSG:25832/12.0,56.0",
+
+    "v1.0/trans/EPSG:4258/EPSG:25832/12.0,56.0,123.4",
+    "v1.1/trans/EPSG:4258/EPSG:25832/12.0,56.0,123.4",
+    "v1.2/trans/EPSG:4258/EPSG:25832/12.0,56.0,123.4",
+
+    "v1.0/trans/EPSG:4258/EPSG:25832/12.0,56.0,123.4,2024.5",
+    "v1.1/trans/EPSG:4258/EPSG:25832/12.0,56.0,123.4,2024.5",
+    "v1.2/trans/EPSG:4258/EPSG:25832/12.0,56.0,123.4,2024.5",
+
+    "v1.0/trans/EPSG:4230/DK:S34S/55.5190,11.83303",
+    "v1.1/trans/EPSG:4230/DK:S34S/55.5190,11.83303",
+    "v1.2/trans/EPSG:4230/DK:S34S/55.5190,11.83303",
+]
+
+EXPECTED_FAILURES = [
+    # Different version numbers of both PROJ and WEBPROJ
+    "v1.2/info/",
+    "v1.2/info",
+
+    # Area of use and bounding box are different due to changes in EPSG registry
+    "v1.0/crs/EPSG:25832",
+    "v1.1/crs/EPSG:25832",
+    "v1.2/crs/EPSG:25832",
+
+    # Numerical differences in the vertical component at the centimeter level.
+    # Caused by use of different DVR90 geoid models in different PROJ versions
+    # in PROD and TEST
+    "v1.0/trans/EPSG:4258+5799/EPSG:4230+5733/55.6581,11.5991,52.4",
+    "v1.1/trans/EPSG:4258+5799/EPSG:4230+5733/55.6581,11.5991,52.4",
+    "v1.2/trans/EPSG:4258+5799/EPSG:4230+5733/55.6581,11.5991,52.4",
+ ]
+
+def run_test_case(test_case: str) -> bool:
+    """
+    Perform a specific test case.
+    """
+    r_test = requests.get(URL_TEST + test_case, params={"token": TOKEN})
+    r_prod = requests.get(URL_PROD + test_case, params={"token": TOKEN})
+
+    try:
+        json_test = r_test.json()
+    except json.decoder.JSONDecodeError:
+        json_prod = "JSON decoding error"
+
+    try:
+        json_prod = r_prod.json()
+    except json.decoder.JSONDecodeError:
+        json_prod = "JSON decoding error"
+
+    test_result = json_test == json_prod
+
+    print(f"{test_case} {(test_result)}")
+
+    if not test_result:
+        print("-"*25)
+        print(json_prod)
+        print("")
+        print(json_test)
+        print("-"*25)
+
+    return test_result
+
+if __name__ == "__main__":
+    for test_case in TEST_CASES:
+        run_test_case(test_case)