add EnableCoverage variable

Author: Bertk

eng/azure-pipelines.yml

@@ -6,6 +6,7 @@ trigger:
 
 variables:
   system.debug: 'true'
+  EnableCoverage: 'false'
 
 jobs:
 - job: Windows

eng/build.yml

@@ -24,12 +24,22 @@ steps:
     command: test
     arguments: -c $(BuildConfiguration) --no-build /p:CollectCoverage=true /p:CoverletOutputFormat=opencover /p:Include="[coverlet.collector]*%2c[coverlet.core]*%2c[coverlet.msbuild.tasks]*" /p:Exclude="[coverlet.core.tests.samples.netstandard]*%2c[coverlet.tests.xunit.extensions]*"
     testRunTitle: $(Agent.JobName)
+  condition: and(succeeded(), eq(variables['enableCoverage'], 'false'))
+
+- task: DotNetCoreCLI@2
+  displayName: Run tests
+  inputs:
+    command: test
+    arguments: -c $(BuildConfiguration) --no-build /p:CollectCoverage=true /p:CoverletOutputFormat=opencover /p:Include="[coverlet.collector]*%2c[coverlet.core]*%2c[coverlet.msbuild.tasks]*" /p:Exclude="[coverlet.core.tests.samples.netstandard]*%2c[coverlet.tests.xunit.extensions]*"
+    testRunTitle: $(Agent.JobName)
+  condition: and(succeeded(), eq(variables['enableCoverage'], 'true'))
 
 - template: publish-coverlet-result-files.yml
 
 - template: publish-coverage-results.yml
   parameters:
     reports: $(Build.SourcesDirectory)/**/coverage.opencover.xml
-    condition: and(succeeded(), eq(variables['BuildConfiguration'], 'Debug'))
+    condition: and(succeeded(), eq(variables['BuildConfiguration'], 'Debug'), eq(variables['enableCoverage'], 'true'))
     assemblyfilters: '-xunit'
 
+