Move PR validation pipeline to yml, run as matrix (microsoft#135)

.gitignore

@@ -18,4 +18,4 @@ client/typeshed-fallback/
 
 junit.xml
 coverage/
-combinedcoverageoutput/
+coverage-merged/

.prettierrc

@@ -2,5 +2,16 @@
   "singleQuote": true,
   "tabWidth": 4,
   "useTabs": false,
-  "printWidth": 120
+  "printWidth": 120,
+  "overrides": [
+    {
+      "files": [
+        "*.yml",
+        "*.yaml"
+      ],
+      "options": {
+        "tabWidth": 2
+      }
+    }
+  ]
 }

build/pr-validation.yml

@@ -0,0 +1,57 @@
+trigger: none
+
+pr:
+  autoCancel: true
+  branches:
+    include: ['master']
+
+strategy:
+  matrix:
+    linux:
+      imageName: 'ubuntu-latest'
+    mac:
+      imageName: 'macOS-latest'
+    windows:
+      imageName: 'windows-latest'
+
+pool:
+  vmImage: $(imageName)
+
+steps:
+  - task: NodeTool@0
+    displayName: Use Node 12.x
+    inputs:
+      versionSpec: '12.x'
+
+  - task: Npm@1
+    displayName: npm run package
+    inputs:
+      command: 'custom'
+      customCommand: 'run package'
+
+  - task: Npm@1
+    displayName: npm run test:all:pipeline
+    inputs:
+      command: 'custom'
+      customCommand: 'run test:all:pipeline'
+
+  - task: PublishPipelineArtifact@1
+    displayName: Publish Istanbul report as artifact
+    inputs:
+      targetPath: '$(System.DefaultWorkingDirectory)/server/coverage-merged'
+      artifact: '$(imageName)-server-coverage-merged'
+      publishLocation: 'pipeline'
+
+  - task: PublishTestResults@2
+    displayName: Publish test results
+    inputs:
+      testResultsFormat: 'JUnit'
+      testResultsFiles: '**/junit.xml'
+      testRunTitle: 'Test results for JavaScript'
+
+  - task: PublishCodeCoverageResults@1
+    displayName: Publish coverage results
+    inputs:
+      codeCoverageTool: Cobertura
+      summaryFileLocation: '$(System.DefaultWorkingDirectory)/server/coverage-merged/cobertura-coverage.xml'
+      failIfCoverageEmpty: true

package.json

@@ -22,7 +22,9 @@
         "clean": "del-cli \"./client/server\" && del-cli \"./client/out\" && del-cli \"./dist\"",
         "clean:pyright": "cd server/pyright && npm run clean && cd ../..",
         "clean:all": "npm run clean && npm run clean:pyright",
-        "package": "npm run install:all && npm run clean:pyright && cd server && npm run build && npx webpack && cd .."
+        "package": "npm run install:all && npm run clean:pyright && cd server && npm run build && npx webpack && cd ..",
+        "test:all": "cd server && npm run test:all && cd ..",
+        "test:all:pipeline": "cd server && npm run test:all:pipeline && cd .."
     },
     "devDependencies": {
         "@types/node": "^12.12.28",