values2(n) does not fit to keys2(n), but a successful response is obtained

[apibugsreporting]

Bug Description

According to the Ohsome documentation, when using the values (or values2) parameter, the number of elements contained in it must fit the number of elements contained in keys (or keys2). In the following request, parameter values2 was used, but not keys2. Still, the request obtained a successful response. Is this the expected behavior?

General Information

Please include the following general information about the issue and list any additional steps needed to reproduce the bug.

• Version of the ohsome API [e.g. 1.5.0]
  • 1.6.1
• Which API instance was requested [e.g. remote instance at https://api.ohsome.org/v1, local instance with an h2 file or connected to the cluster, etc.]
  • Remote instance at https://api.ohsome.org/v1
• Affected endpoint(s) [e.g. /contributions/count]
  • /elements/area/ratio
• URL of your request (and request body if applicable)
  • https://api.ohsome.org/v1/elements/area/ratio?types2=point%2Cpolygon%2Cother&format=json&showMetadata=no&filter2=surface%21%3D*%20and%20not%20geometry%3Apoint%20or%20not%20length%3A%28%20..%20100%29&time=2010-04-08&timeout=34&values2=cycleway&bcircles=Xw%3A8.749%2C49.416668%2C6%7Cmx%3A8.7237%2C49.4221%2C9%7CNLhjJ%3A8.71854%2C49.4375%2C2
• Used HTTP method [GET or POST]
  • Both
• Utilized tool/library for the request [e.g. cURL, Postman, ohsome-py, etc.]
  • RESTest

Expected Behaviour

The API should return a 400 status code, since the request is invalid.

Further Information

Additional Information

A test report revealing this issue is available at the following URL (it might take some time to load):

• http://apitesting.ddns.net/fse2022/restest/target/allure-reports/ohsome__r_cbt_perturbation/#behaviors/b1a8273437954620fa374b796ffaacdd/bbf912a283bf8aa5/