GraphQL "modifiedsince" returns error and does not display information

Description

When using the Xray GraphQL API getTestExecutions query with the modifiedSince parameter, no Test Execution details are returned when querying dates:

For example, the following GraphQL query does not return any results:

getTestExecutions(jql: "project = 'PROJECTNAME'", modifiedSince:"", limit: 10,) {

This suggests that the modifiedSince parameter may not be correctly identifying Test Executions that were modified within the specified date range.

How to reproduce

1. Open Postman or Insomnia
2. Execute the following GraphQL query:

{
	getTestExecutions(jql: "project = 'FW'", modifiedSince:"", limit: 10,) {
		total
        start
        limit
		results {
			jira(fields: ["key", "assignee"])
			testEnvironments
			tests(limit: 100) {
				results {
					jira(fields: ["key"])
				}
			}
		}
	}
}

1. Observe the response: Get approximate count for JQL failed! - JQL query error: A value, list, or function was expected, but ‘,’ was returned. You must enclose ‘,’ in quotes to use it as a value.

Actual result/Attachments

No Test Execution results are returned when using the modifiedSince parameter, despite Test Executions existing that were updated within the specified period:

Expected result

The getTestExecutions GraphQL query should return the Test Executions that were modified on or after the date/time specified in the modifiedSince parameter.

The behavior should be consistent with the results obtained when using the equivalent Jira JQL updated criteria.

Version

• 16.6.0