Give an example of how you would select test cases for a PUT request?

To select test cases for a PUT request, I would apply the following approaches, focusing on different aspects:

• Valid data:

  • Creating/updating a record with correct, complete data.
  • Changing only some fields, leaving others unchanged.
  • Updating all fields to new, valid values.
  • Using boundary values for numeric fields (minimum, maximum).
  • Using various data formats allowed by the specification (e.g., date, time).

• Invalid data:

  • Passing data with incorrect field types (e.g., string instead of number).
  • Passing data that violates string length or number range constraints.
  • Passing data that violates field uniqueness (if applicable).
  • Passing data with incorrect formats (invalid date, email).
  • Omitting required fields.
  • Passing empty strings or null for fields that should not be empty.

• Resource existence:

  • PUT request to an existing resource.
  • PUT request to a non-existent resource (expecting 404 response).

• Authorization and authentication:

  • PUT request with correct user credentials authorized to modify the resource.
  • PUT request with incorrect or missing credentials (expecting 401 Unauthorized or 403 Forbidden).
  • PUT request from a user without necessary rights to modify the resource (expecting 403 Forbidden).

• Synchronization and concurrency:

  • Simultaneous PUT requests to the same resource (e.g., using etag).

• Error handling:

  • PUT request that should trigger a server-side error (e.g., due to internal failure).

Example table of test cases:

ID	Test case description	Preconditions	Test data (part of request)	Expected result	HTTP Code
PUT-001	Updating an existing resource with valid data	Resource with ID=123 exists	{ "name": "New Name", "value": 100 }	Resource successfully updated, data matches request	200
PUT-002	Updating an existing resource with partial update	Resource with ID=123 exists	{ "name": "Only Name Changed" }	Resource successfully updated, only name changed	200
PUT-003	Attempting to update a non-existent resource	Resource with ID=999 does not exist	{ "name": "Non Existent Update" }	Resource not found	404
PUT-004	Updating resource with invalid data type	Resource with ID=123 exists	{ "value": "not_a_number" }	Data validation error	400
PUT-005	Updating resource without authentication	Resource with ID=123 exists, request without token	{ "name": "Unauthorized Change" }	Unauthorized	401

Each test case should be atomic and verify a specific aspect of the PUT request functionality.