How to associate a test result posted to VSTS with a testcase residing in VSTS? - azure-devops-rest-api

Question

We have an automation test framework written in Java.
At present, I can post a new test run to VSTS.
I can then post a new test result to the test run, eg:
{'testCaseTitle':'vstsPostTest',
'automatedTestName':'myAutomatedTestName',
'outcome':'Passed',
'errorMessage':'successfully completed vstsPostTest'}
However, when viewing the test result entry in VSTS, the testCaseTitle always seems to be overridden with value: 'myTestCaseTitle'.
Thinking this may be because I haven't associated the posted result with a testcase that resides in VSTS, I have added the testCase id parameter, and specified the ID of a random existing testCase in VSTS, eg,
{'testCaseTitle':'is title now necessary?',
'testCase'{'id':283},
'automatedTestName':'myAutomatedTestName',
'outcome':'Passed',
'errorMessage':'successfully completed vstsPostTest'}
My posted result still has the generic title 'myTestCaseTitle' - and I have seen nothing yet in VSTS which illustrates a link between the posted result and the specified testcase which resides in VSTS.
What else is necessary to:
a) Ensure that a posted result uses the specified testCaseTitle value (or receives it from the ID of the associated testCase)
b) See that either a testCase or story in VSTS is flagged as failing/passed, based on the latest testrun results. (ie, identify where stories are failing as a result of automated regression testing)
Many thanks

Answer 1

Try to specify test point ID:
POST: https://[team project url]/_apis/test/runs/[test run id]/results?api-version=3.0-preview
[
{
"testPoint":{
"id":XX
},
"priority": 1,
"outcome": "Passed"
}
]
You can get test point id by using Test points REST API

Answer 2

With thanks to Starains help. As commented: I ended up carefully following this MS post: social.msdn.microsoft.com/Forums/sqlserver/en-US/… To others reading: after a VSTS test plan, suite, case is created: post a new test run (specify plan ID), then post a new test result (specify testPoint ID, outcome, etc) then get the testResult ID and update that test result to state: Completed. This is the minimum to affect the outcome of a test case in VSTS.