Add provisional CommonJS tests

.github/workflows/test.cjs.yml

@@ -0,0 +1,22 @@
+name: Tests
+on: [push, pull_request]
+jobs:
+  test:
+    env:
+      NODE_ENV: development
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [10.x]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v1
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: Test Legacy Node
+        run: |
+          npm install && npm install tape
+          FORCE_COLOR= npx tape tests/index.test.cjs
+

tests/index.test.cjs

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+const c = require("../")
+const test = require("tape")
+const exec = require("child_process").exec
+
+const colors = [
+  ["reset", "\x1b[0m", "\x1b[0m"],
+  ["bold", "\x1b[1m", "\x1b[22m"],
+  ["dim", "\x1b[2m", "\x1b[22m"],
+  ["italic", "\x1b[3m", "\x1b[23m"],
+  ["underline", "\x1b[4m", "\x1b[24m"],
+  ["inverse", "\x1b[7m", "\x1b[27m"],
+  ["hidden", "\x1b[8m", "\x1b[28m"],
+  ["strikethrough", "\x1b[9m", "\x1b[29m"],
+  ["black", "\x1b[30m", "\x1b[39m"],
+  ["red", "\x1b[31m", "\x1b[39m"],
+  ["green", "\x1b[32m", "\x1b[39m"],
+  ["yellow", "\x1b[33m", "\x1b[39m"],
+  ["blue", "\x1b[34m", "\x1b[39m"],
+  ["magenta", "\x1b[35m", "\x1b[39m"],
+  ["cyan", "\x1b[36m", "\x1b[39m"],
+  ["white", "\x1b[37m", "\x1b[39m"],
+  ["gray", "\x1b[90m", "\x1b[39m"],
+  ["bgBlack", "\x1b[40m", "\x1b[49m"],
+  ["bgRed", "\x1b[41m", "\x1b[49m"],
+  ["bgGreen", "\x1b[42m", "\x1b[49m"],
+  ["bgYellow", "\x1b[43m", "\x1b[49m"],
+  ["bgBlue", "\x1b[44m", "\x1b[49m"],
+  ["bgMagenta", "\x1b[45m", "\x1b[49m"],
+  ["bgCyan", "\x1b[46m", "\x1b[49m"],
+  ["bgWhite", "\x1b[47m", "\x1b[49m"],
+  ["blackBright", "\x1b[90m", "\x1b[39m"],
+  ["redBright", "\x1b[91m", "\x1b[39m"],
+  ["greenBright", "\x1b[92m", "\x1b[39m"],
+  ["yellowBright", "\x1b[93m", "\x1b[39m"],
+  ["blueBright", "\x1b[94m", "\x1b[39m"],
+  ["magentaBright", "\x1b[95m", "\x1b[39m"],
+  ["cyanBright", "\x1b[96m", "\x1b[39m"],
+  ["whiteBright", "\x1b[97m", "\x1b[39m"],
+  ["bgBlackBright", "\x1b[100m", "\x1b[49m"],
+  ["bgRedBright", "\x1b[101m", "\x1b[49m"],
+  ["bgGreenBright", "\x1b[102m", "\x1b[49m"],
+  ["bgYellowBright", "\x1b[103m", "\x1b[49m"],
+  ["bgBlueBright", "\x1b[104m", "\x1b[49m"],
+  ["bgMagentaBright", "\x1b[105m", "\x1b[49m"],
+  ["bgCyanBright", "\x1b[106m", "\x1b[49m"],
+  ["bgWhiteBright", "\x1b[107m", "\x1b[49m"],
+]
+
+test("colors", (t) => {
+  t.plan(colors.length)
+  colors.map(([name, open, close]) =>
+    t.equal(c[name](name), open + name + close, name)
+  )
+})
+
+test("nesting", (t) => {
+  t.plan(2)
+
+  t.equal(
+    c.bold(`bold ${c.red(`red ${c.dim("dim")} red`)} bold`),
+    "\x1B[1mbold \x1B[31mred \x1B[2mdim\x1B[22m\x1B[1m red\x1B[39m bold\x1B[22m",
+    "simple"
+  )
+  t.equal(
+    c.magenta(
+      `magenta ${c.yellow(
+        `yellow ${c.cyan("cyan")} ${c.red("red")} ${c.green("green")} yellow`
+      )} magenta`
+    ),
+    "\x1B[35mmagenta \x1B[33myellow \x1B[36mcyan\x1B[33m \x1B[31mred\x1B[33m \x1B[32mgreen\x1B[33m yellow\x1B[35m magenta\x1B[39m",
+    "complex"
+  )
+})
+
+test("numbers & others", (t) => {
+  const values = [new Date(), -1e10, -1, -0.1, 0, 0.1, 1, 1e10]
+  t.plan(values.length)
+  values.map((n) => t.equal(c.red(n), `\x1b[31m${n}\x1b[39m`))
+})
+
+test("empty & falsy values", (t) => {
+  t.plan(9)
+  t.equal(c.blue(), "", "nothing")
+  t.equal(c.blue(""), "", '""')
+  t.equal(c.blue(undefined), "", "undefined")
+  t.equal(c.blue(0), "\x1b[34m0\x1b[39m", "0")
+  t.equal(c.blue(NaN), "\x1b[34mNaN\x1b[39m", "NaN")
+  t.equal(c.blue(null), "\x1b[34mnull\x1b[39m", "null")
+  t.equal(c.blue(true), "\x1b[34mtrue\x1b[39m", "true")
+  t.equal(c.blue(false), "\x1b[34mfalse\x1b[39m", "false")
+  t.equal(c.blue(Infinity), "\x1b[34mInfinity\x1b[39m", "Infinity")
+})
+
+test("createColors", (t) => {
+  t.plan(2)
+  t.equal(
+    c.blue("megazord"),
+    c.createColors({ useColor: true }).blue("megazord"),
+    "useColor: true"
+  )
+  t.equal(
+    "megazord",
+    c.createColors({ useColor: false }).blue("megazord"),
+    "useColor: false"
+  )
+})
+
+test("environment", (t) => {
+  t.plan(4)
+
+  exec(
+    `FORCE_COLOR= node --print --eval '
+      require("./index.cjs").blue("foo")
+    '`,
+    (_, stdout) => t.equal(stdout, "\x1B[34mfoo\x1B[39m\n", "FORCE_COLOR")
+  )
+  exec(
+    `NO_COLOR= node --print --eval '
+      process.argv.push("--color")
+      require("./index.cjs").blue("foo")
+    '`,
+    (_, stdout) => t.equal(stdout, "foo\n", "NO_COLOR")
+  )
+  exec(
+    `FORCE_COLOR= node --print --eval '
+      process.argv.push("--no-color")
+      require("./index.cjs").blue("foo")
+    '`,
+    (_, stdout) => t.equal(stdout, "foo\n", "--no-color")
+  )
+  exec(
+    `FORCE_COLOR= node --print --eval '
+      process.argv.push("--color")
+      require("./index.cjs").blue("foo")
+    '`,
+    (_, stdout) => t.equal(stdout, "\x1B[34mfoo\x1B[39m\n", "--color")
+  )
+})