How to add a unit test in Azure DevOps pipeline

Question

 I Can't see the unit test result after running the build. This happened after I added a build pipeline.  

  A total of 14 test files matched the specified pattern.
           No test is available in d:\a\1\s\src.net... 
Make sure that test discoverer & executors are registered and platform & framework version settings are appropriate and try again.
            Results File: d:\a\_temp\TestResults\VssAdministrator_fv-az686_2019-12-26_06_10_28.trx
            Attachments:
              d:\a\_temp\TestResults\d301a26b-d99f-4b4e-bbe8-c95e588ee1c5\VssAdministrator_fv-az686 2019-12-26 06_10_20.coverage
            Vstest.console.exe exited with code 0.
            **************** Completed test execution *********************
            Test results files: d:\a\_temp\TestResults\VssAdministrator_fv-az686_2019-12-26_06_10_28.trx
            No Result Found to Publish 'd:\a\_temp\TestResults\VssAdministrator_fv-az686_2019-12-26_06_10_28.trx'.
            Created test run: 1006840
            Publishing test results: 0
            Publishing test results to test run '1006840'.
            TestResults To Publish 0, Test run id:1006840
            Published test results: 0
            Publishing Attachments: 2
            Completed TestExecution Model...

This is the result I am getting from the unit test task. And the code coverage is also shown blank.

The test YAML script is as below:

steps:
- task: VSTest@2
  displayName: 'Test Assemblies'
  inputs:
    testAssemblyVer2: |
     **\$(BuildConfiguration)\*test*.dll
     !**\obj\**
    codeCoverageEnabled: true
    platform: '$(BuildPlatform)'
    configuration: '$(BuildConfiguration)'

Any suggestions would be appreciated.