Revert "Tests: travis -> github CI"

.github/workflows/ci.yml

@@ -1,98 +0,0 @@
-name: CI
-
-on:
-  pull_request:
-    paths-ignore:
-      - 'docs/**'
-  push:
-    paths-ignore:
-      - 'docs/**'
-
-jobs:
-
-  lint:
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: Git checkout
-        uses: actions/checkout@v2
-      - name: Install node
-        uses: actions/setup-node@v1
-        with:
-          node-version: '10.x'
-      - name: Restore cache
-        uses: actions/cache@v1
-        env:
-          cache-name: cache-node-modules
-        with:
-          path: ~/.npm
-          key: ${{ runner.os }}-ci-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
-          restore-keys: |
-            ${{ runner.os }}-ci-${{ env.cache-name }}-
-            ${{ runner.os }}-ci-
-            ${{ runner.os }}-
-      - name: Install packages
-        run: npm ci && sudo apt-get install xvfb
-
-      - name: === Linting ===
-        run: npm run test-lint
-
-  unit:
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: Git checkout
-        uses: actions/checkout@v2
-      - name: Install node
-        uses: actions/setup-node@v1
-        with:
-          node-version: '10.x'
-      - name: Restore cache
-        uses: actions/cache@v1
-        env:
-          cache-name: cache-node-modules
-        with:
-          path: ~/.npm
-          key: ${{ runner.os }}-ci-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
-          restore-keys: |
-            ${{ runner.os }}-ci-${{ env.cache-name }}-
-            ${{ runner.os }}-ci-
-            ${{ runner.os }}-
-      - name: Install packages
-        run: npm ci && sudo apt-get install xvfb
-
-      - name: === Unit testing ===
-        run: npm run test-unit
-
-  e2e:
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        CI: [ 0, 1, 2, 3 ]
-    env:
-      CI: ${{ matrix.CI }}
-      FORCE_COLOR: 1
-
-    steps:
-      - name: Git checkout
-        uses: actions/checkout@v2
-      - name: Install node
-        uses: actions/setup-node@v1
-        with:
-          node-version: '10.x'
-      - name: Restore cache
-        uses: actions/cache@v1
-        env:
-          cache-name: cache-node-modules
-        with:
-          path: ~/.npm
-          key: ${{ runner.os }}-ci-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
-          restore-keys: |
-            ${{ runner.os }}-ci-${{ env.cache-name }}-
-            ${{ runner.os }}-ci-
-            ${{ runner.os }}-
-      - name: Install packages
-        run: npm ci && sudo apt-get install xvfb
-
-      - name: === End-to-end testing ===
-        run: xvfb-run --auto-servernum npm run test-e2e

.travis.yml

@@ -0,0 +1,27 @@
+language: node_js
+node_js: node
+services: xvfb
+cache: bundler
+
+jobs:
+  include:
+
+    - &lint-n-unit
+      stage: lint & unit
+      name: lint
+      script: npm run test-lint
+    - <<: *lint-n-unit
+      name: unit
+      script: npm run test-unit
+
+    - &e2e
+      stage: e2e
+      name: e2e
+      script: npm run test-e2e
+      env: FORCE_COLOR=0 CI=0
+    - <<: *e2e
+      env: FORCE_COLOR=0 CI=1
+    - <<: *e2e
+      env: FORCE_COLOR=0 CI=2
+    - <<: *e2e
+      env: FORCE_COLOR=0 CI=3