Require build to Contain Unit tests VSTS - azure-devops

Question

I have 1 question
We use VSTS in our company. Now I want to require my developers to write unit tests to each project
My question is: If I can to build in Team Service Web Portal to require contain Unit tests, and if project doesn't has any unit tests - set build fail?
Thank you.

Answer 1

You can add a PowerShell task to check if the build project contains unit tests. Detail steps as below:
Add a PowerShell task after VS test task, and get VS test build log by timeline REST API. For TFS the rest api format should be:
GET http://{tsserver}:8080/tfs/{collection}/{project}/_apis/build/builds/{buildId}/timeline?api-version=3.0
Then search the log for VS test task, and you can get the detail VS test build log by the url. Such as below example, VS test task build log can be find in http://wxv-xindo-12r2:8080/tfs/DefaultCollection/5dfb8b33-9949-4187-9d09-474c8fe87238/_apis/build/builds/1477/logs/5.
{
"id": "c43e4f8f-3db9-4fdc-90c0-1153f165b9a9",
"parentId": "39d66172-979a-46e8-a04d-fe8e4e77da43",
"type": "Task",
"name": "Test Assemblies",
"startTime": "2018-05-25T02:31:11.177Z",
"finishTime": "2018-05-25T02:31:17.133Z",
"currentOperation": null,
"percentComplete": null,
"state": "completed",
"result": "succeeded",
"resultCode": null,
"changeId": 17,
"lastModified": "0001-01-01T00:00:00",
"workerName": "mypc",
"order": 5,
"details": null,
"errorCount": 0,
"warningCount": 2,
"url": null,
"log": {
"id": 5,
"type": "Container",
"url": "http://tfsserver:8080/tfs/DefaultCollection/5dfb8b33-9949-4187-9d09-474c8fe87238/_apis/build/builds/1477/logs/5"
},
"task": {
"id": "ef087383-ee5e-42c7-9a53-ab56c98420f9",
"name": "VSTest",
"version": "2.0.55"
},
"issues": [
{
"type": "warning",
"category": "General",
"message": "",
"data": {
"type": "warning",
"code": "002004"
}
},
{
"type": "warning",
"category": "General",
"message": "No test assemblies found matching the pattern: **\\release\\*test*.dll,!**\\obj\\**.",
"data": {
"type": "warning"
}
}
]
}
Then check if the VS test task has the warning:
[warning]No test assemblies found matching the pattern: '**\*test*.dll;-:**\obj\**'
If the VS test build log contains above warning, fail the PowerShell task by exit 1.