build: add code coverage and integration tests (#16)

Author: Benjamin E. Coe

.github/workflows/ci.yaml

@@ -0,0 +1,39 @@
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    types: [ assigned, opened, synchronize, reopened, labeled ]
+name: ci
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node: [16]
+    steps:
+      - uses: actions/checkout@v1
+      - uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node }}
+      - run: node --version
+      - run: npm install --engine-strict
+      - run: npm test
+  windows:
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: 16
+      - run: npm install
+      - run: npm test
+  coverage:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: 16
+      - run: npm install
+      - run: npm run coverage

.nycrc

@@ -0,0 +1,9 @@
+{
+  "reporter": [
+    "html",
+    "text"
+  ],
+  "lines": 95,
+  "branches": "80",
+  "statements": "95"
+}

README.md

@@ -1,6 +1,8 @@
 <!-- omit in toc -->
 # parseArgs
 
+[![Coverage][coverage-image]][coverage-url]
+
 > 
 > 🚨  THIS REPO IS AN EARLY WIP -- DO NOT USE ... yet 🚨
 > 
@@ -194,3 +196,6 @@ positionals // ['b']
   - the second flag would be parsed as `'foo'`
 - Is `-` a positional? ie, `bash some-test.sh | tap -`
   - no
+
+[coverage-image]: https://img.shields.io/nycrc/pkgjs/parseargs
+[coverage-url]: https://github.com/pkgjs/parseargs/blob/main/.nycrc