lit-html-1.x: Run tests on GitHub actions (#1967)

* Copy test workflow from main branch.

* Update test workflows to work with the lit-html-1.x branch.

* Run local tests in XVFB

* Update `actions/setup-node` and node version.

* Remove 'benchmarks.yml' reference in comments.

* Delete `.travis.yml` and `travis-bench.sh`.

* Initial attempt at porting the benchmarks to a GitHub action.

* Update tachometer.

* Copy benchmarks workflow from main branch.

* Update benchmark workflow to work with the lit-html-1.x branch.

* Fix node_modules key.

* Update to `actions/setup-node@v2`.

* Use `git+https` protocol to avoid SSH which doesn't seem to work.

* Move tachometer config to an external file.

* Fix benchmark names in report action.

* Update chromedriver.

* Update URLs and references in tachometer.json .

* Update ref in tachometer.json .

* Update badge in README.md .

* Remove `report-id` field from Tachometer reporter step.

.github/workflows/benchmarks.yml

@@ -0,0 +1,47 @@
+name: Benchmarks
+
+on: [pull_request]
+
+jobs:
+  benchmarks:
+    name: benchmarks
+
+    # We can't currently run benchmarks on PRs from forked repos, because the
+    # tachometer action reports results by posting a comment, and we can't post
+    # comments without a github token.
+    if: github.event.pull_request == null || github.event.pull_request.head.repo.full_name == github.repository
+
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: actions/setup-node@v2
+        with:
+          node-version: 14
+
+      - name: Restore node_modules
+        id: cache
+        uses: actions/cache@v2
+        with:
+          path: node_modules
+          # Bump the number after `lit-1.x-node-modules` to force a cache
+          # update. Note there are multiple cache actions in `tests.yml` that
+          # should all keep keys in sync.
+          key: lit-1.x-node-modules-0-${{ runner.os }}-${{ hashFiles('package-lock.json') }}
+
+      - name: NPM install
+        if: steps.cache.outputs.cache-hit != 'true'
+        run: npm ci
+
+      - name: Build
+        run: npm run build
+
+      - name: Benchmark
+        run: npx tach --config tachometer.json --json-file results.json
+
+      - name: Report
+        uses: andrewiggins/tachometer-reporter-action@v2
+        with:
+          path: results.json
+          pr-bench-name: this-change
+          base-bench-name: lit-html-1.x

.github/workflows/tests.yml

@@ -0,0 +1,90 @@
+name: Tests
+
+on: [push, pull_request]
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: actions/setup-node@v2
+        with:
+          node-version: 14
+
+      - run: npm ci
+
+      - run: >-
+          npm run format && git diff --exit-code || (echo -e '\n\033[31mERROR:\033[0m
+          Project is not formatted. Please run "npm run format".' && false)
+
+  tests-local:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: actions/setup-node@v2
+        with:
+          node-version: 14
+
+      - name: Restore node_modules
+        id: cache
+        uses: actions/cache@v2
+        with:
+          path: node_modules
+          # Bump the number after `lit-1.x-node-modules` to force a cache
+          # update. Note there are cache actions in other jobs in this file that
+          # should all keep keys in sync.
+          key: lit-1.x-node-modules-0-${{ runner.os }}-${{ hashFiles('package-lock.json') }}
+
+      - name: NPM install
+        if: steps.cache.outputs.cache-hit != 'true'
+        run: npm ci
+
+      - name: Install XVFB
+        run: sudo apt-get install xvfb
+
+      - name: Build
+        run: npm run build
+
+      - name: Test
+        run: xvfb-run npx wct --npm
+
+  tests-sauce:
+    # We can't run Sauce tests on PRs from forked repos, since they don't have
+    # access to secrets.
+    if: github.event.pull_request == null || github.event.pull_request.head.repo.full_name == github.repository
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: actions/setup-node@v2
+        with:
+          node-version: 14
+
+      - name: Restore node_modules
+        id: cache
+        uses: actions/cache@v2
+        with:
+          path: node_modules
+          # Bump the number after `lit-1.x-node-modules` to force a cache
+          # update. Note there are cache actions in other jobs in this file that
+          # should all keep keys in sync.
+          key: lit-1.x-node-modules-0-${{ runner.os }}-${{ hashFiles('package-lock.json') }}
+
+      - name: NPM install
+        if: steps.cache.outputs.cache-hit != 'true'
+        run: npm ci
+
+      - name: Build
+        run: npm run build
+
+      - name: Test
+        env:
+          SAUCE_USERNAME: ${{ secrets.SAUCE_USERNAME }}
+          SAUCE_ACCESS_KEY: ${{ secrets.SAUCE_ACCESS_KEY }}
+        run: npx wct -s 'windows 10/microsoftedge@17' -s 'windows 10/microsoftedge@15' -s 'macos 10.13/safari@11' -s 'macos 10.12/safari@10' -s 'windows 8.1/internet explorer@11' -s 'Linux/chrome@41' --npm

README.md

@@ -1,7 +1,7 @@
 # lit-html
 Efficient, Expressive, Extensible HTML templates in JavaScript
 
-[![Build Status](https://travis-ci.org/lit/lit.svg?branch=lit-html-1.4.x)](https://travis-ci.org/Polymer/lit-html)
+[![Build Status](https://github.com/lit/lit/actions/workflows/tests.yml/badge.svg?branch=lit-html-1.x)](https://github.com/lit/lit/actions/workflows/tests.yml?query=branch%3Alit-html-1.x)
 [![Published on npm](https://img.shields.io/npm/v/lit-html.svg)](https://www.npmjs.com/package/lit-html)
 [![Join our Slack](https://img.shields.io/badge/slack-join%20chat-4a154b.svg)](https://lit.dev/slack-invite/)
 [![Mentioned in Awesome Lit](https://awesome.re/mentioned-badge.svg)](https://github.com/web-padawan/awesome-lit)