[INFRA] upload html test results in GitHub Build workflow (#622)

Setup the html jest reporter to easily read errors both locally and as a results of run with GitHub workflows.
The test result artifacts are only uploaded on test failure.

.github/workflows/build.yml

@@ -53,6 +53,20 @@ jobs:
       - name: Build Application
         run: npm run build
       - name: Test Application
+        id: 'test_unit'
         run: npm run test:unit
+      - name: Upload unit test results
+        if: ${{ failure() && steps.test_unit.outcome == 'failure' }}
+        uses: actions/upload-artifact@v2
+        with:
+          name: unit-test-results-${{matrix.os.name}}-${{github.sha}}
+          path: build/test-report/unit
       - name: Test Application End to End
+        id: 'test_e2e'
         run: npm run test:e2e
+      - name: Upload e2e test results
+        if: ${{ failure() && steps.test_e2e.outcome == 'failure' }}
+        uses: actions/upload-artifact@v2
+        with:
+          name: e2e-test-results-${{matrix.os.name}}-${{github.sha}}
+          path: build/test-report/e2e

jest.config.e2e.js

@@ -28,4 +28,16 @@ module.exports = {
   setupFiles: ['<rootDir>/test/e2e/config/jest.globals.ts'],
   // jest-image-snapshot configuration doesn't work with setupFiles, fix with setupFilesAfterEnv: see https://github.com/testing-library/jest-dom/issues/122#issuecomment-650520461
   setupFilesAfterEnv: ['<rootDir>/test/e2e/config/jest.image.ts'],
+  reporters: [
+    'default',
+    [
+      'jest-html-reporter',
+      {
+        pageTitle: 'bpmn-visualization E2E Test Report',
+        outputPath: 'build/test-report/e2e/index.html',
+        includeFailureMsg: true,
+        includeSuiteFailure: true,
+      },
+    ],
+  ],
 };

jest.config.unit.js

@@ -37,4 +37,16 @@ module.exports = {
   },
   coverageReporters: ['json', 'json-summary', 'lcov', 'text', 'text-summary', 'clover'],
   setupFiles: ['<rootDir>/test/unit/jest.globals.ts'],
+  reporters: [
+    'default',
+    [
+      'jest-html-reporter',
+      {
+        pageTitle: 'bpmn-visualization Unit Test Report',
+        outputPath: 'build/test-report/unit/index.html',
+        includeFailureMsg: true,
+        includeSuiteFailure: true,
+      },
+    ],
+  ],
 };