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node_modules/command-line-args/test/internals/option-flag.js

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+'use strict'
+const TestRunner = require('test-runner')
+const FlagOption = require('../../lib/option-flag')
+const a = require('assert')
+
+const runner = new TestRunner()
+
+runner.test('type-boolean: single set', function () {
+  const option = new FlagOption({ name: 'one', type: Boolean })
+
+  option.set(undefined)
+  a.strictEqual(option.get(), true)
+})
+
+runner.test('type-boolean: single set 2', function () {
+  const option = new FlagOption({ name: 'one', type: Boolean })
+
+  option.set('true')
+  a.strictEqual(option.get(), true)
+})
+
+runner.test('type-boolean: set twice', function () {
+  const option = new FlagOption({ name: 'one', type: Boolean })
+
+  option.set(undefined)
+  a.strictEqual(option.get(), true)
+  a.throws(
+    () => option.set('true'),
+    err => err.name === 'ALREADY_SET'
+  )
+})
+
+const origBoolean = Boolean
+
+/* test in contexts which override the standard global Boolean constructor */
+runner.test('type-boolean: global Boolean overridden', function () {
+  function Boolean () {
+    return origBoolean.apply(origBoolean, arguments)
+  }
+
+  const option = new FlagOption({ name: 'one', type: Boolean })
+
+  option.set()
+  a.strictEqual(option.get(), true)
+})
+
+runner.test('type-boolean-multiple: 1', function () {
+  const option = new FlagOption({ name: 'one', type: Boolean, multiple: true })
+
+  option.set(undefined)
+  option.set(undefined)
+  option.set(undefined)
+
+  a.deepStrictEqual(option.get(), [ true, true, true ])
+})