init

node_modules/cucumber-expressions/test/assert_throws.js

@@ -0,0 +1,7 @@
+const assert = require('assert')
+
+// A better assert.error that allows an exact error message
+module.exports = (fn, message) => {
+  const regexp = new RegExp(message.replace(/[-[\]/{}()*+?.\\^$|]/g, '\\$&'))
+  assert.throws(fn, regexp)
+}

node_modules/cucumber-expressions/test/combinatorial_generated_expression_factory_test.js

@@ -0,0 +1,69 @@
+/* eslint-env mocha */
+const assert = require('assert')
+const ParameterType = require('../src/parameter_type')
+const CombinatorialGeneratedExpressionFactory = require('../src/combinatorial_generated_expression_factory')
+
+describe('CucumberExpressionGenerator', () => {
+  it('generates multiple expressions', () => {
+    const parameterTypeCombinations = [
+      [
+        new ParameterType(
+          'color',
+          /red|blue|yellow/,
+          null,
+          s => s,
+          false,
+          true
+        ),
+        new ParameterType(
+          'csscolor',
+          /red|blue|yellow/,
+          null,
+          s => s,
+          false,
+          true
+        ),
+      ],
+      [
+        new ParameterType(
+          'date',
+          /\d{4}-\d{2}-\d{2}/,
+          null,
+          s => s,
+          false,
+          true
+        ),
+        new ParameterType(
+          'datetime',
+          /\d{4}-\d{2}-\d{2}/,
+          null,
+          s => s,
+          false,
+          true
+        ),
+        new ParameterType(
+          'timestamp',
+          /\d{4}-\d{2}-\d{2}/,
+          null,
+          s => s,
+          false,
+          true
+        ),
+      ],
+    ]
+
+    const factory = new CombinatorialGeneratedExpressionFactory(
+      'I bought a {%s} ball on {%s}',
+      parameterTypeCombinations
+    )
+    const expressions = factory.generateExpressions().map(ge => ge.source)
+    assert.deepEqual(expressions, [
+      'I bought a {color} ball on {date}',
+      'I bought a {color} ball on {datetime}',
+      'I bought a {color} ball on {timestamp}',
+      'I bought a {csscolor} ball on {date}',
+      'I bought a {csscolor} ball on {datetime}',
+      'I bought a {csscolor} ball on {timestamp}',
+    ])
+  })
+})

node_modules/cucumber-expressions/test/cucumber_expression_generator_test.js

@@ -0,0 +1,248 @@
+/* eslint-env mocha */
+const assert = require('assert')
+const CucumberExpressionGenerator = require('../src/cucumber_expression_generator')
+const CucumberExpression = require('../src/cucumber_expression')
+const ParameterType = require('../src/parameter_type')
+const ParameterTypeRegistry = require('../src/parameter_type_registry')
+
+class Currency {}
+
+describe('CucumberExpressionGenerator', () => {
+  let parameterTypeRegistry, generator
+
+  function assertExpression(expectedExpression, expectedArgumentNames, text) {
+    const generatedExpression = generator.generateExpressions(text)[0]
+    assert.deepEqual(generatedExpression.parameterNames, expectedArgumentNames)
+    assert.equal(generatedExpression.source, expectedExpression)
+
+    const cucumberExpression = new CucumberExpression(
+      generatedExpression.source,
+      parameterTypeRegistry
+    )
+    const match = cucumberExpression.match(text)
+    if (match === null) {
+      assert.fail(
+        `Expected text '${text}' to match generated expression '${
+          generatedExpression.source
+        }'`
+      )
+    }
+    assert.equal(match.length, expectedArgumentNames.length)
+  }
+
+  beforeEach(() => {
+    parameterTypeRegistry = new ParameterTypeRegistry()
+    generator = new CucumberExpressionGenerator(parameterTypeRegistry)
+  })
+
+  it('documents expression generation', () => {
+    const parameterRegistry = new ParameterTypeRegistry()
+    /// [generate-expression]
+    const generator = new CucumberExpressionGenerator(parameterRegistry)
+    const undefinedStepText = 'I have 2 cucumbers and 1.5 tomato'
+    const generatedExpression = generator.generateExpressions(
+      undefinedStepText
+    )[0]
+    assert.equal(
+      generatedExpression.source,
+      'I have {int} cucumbers and {float} tomato'
+    )
+    assert.equal(generatedExpression.parameterNames[0], 'int')
+    assert.equal(generatedExpression.parameterTypes[1].name, 'float')
+    /// [generate-expression]
+  })
+
+  it('generates expression for no args', () => {
+    assertExpression('hello', [], 'hello')
+  })
+
+  it('generates expression with escaped left parenthesis', () => {
+    assertExpression('\\(iii)', [], '(iii)')
+  })
+
+  it('generates expression with escaped left curly brace', () => {
+    assertExpression('\\{iii}', [], '{iii}')
+  })
+
+  it('generates expression with escaped slashes', () => {
+    assertExpression(
+      'The {int}\\/{int}\\/{int} hey',
+      ['int', 'int2', 'int3'],
+      'The 1814/05/17 hey'
+    )
+  })
+
+  it('generates expression for int float arg', () => {
+    assertExpression(
+      'I have {int} cukes and {float} euro',
+      ['int', 'float'],
+      'I have 2 cukes and 1.5 euro'
+    )
+  })
+
+  it('generates expression for strings', () => {
+    assertExpression(
+      'I like {string} and {string}',
+      ['string', 'string2'],
+      'I like "bangers" and \'mash\''
+    )
+  })
+
+  it('generates expression with % sign', () => {
+    assertExpression('I am {int}%% foobar', ['int'], 'I am 20%% foobar')
+  })
+
+  it('generates expression for just int', () => {
+    assertExpression('{int}', ['int'], '99999')
+  })
+
+  it('numbers only second argument when builtin type is not reserved keyword', () => {
+    assertExpression(
+      'I have {float} cukes and {float} euro',
+      ['float', 'float2'],
+      'I have 2.5 cukes and 1.5 euro'
+    )
+  })
+
+  it('generates expression for custom type', () => {
+    parameterTypeRegistry.defineParameterType(
+      new ParameterType(
+        'currency',
+        /[A-Z]{3}/,
+        Currency,
+        s => new Currency(s),
+        true,
+        false
+      )
+    )
+
+    assertExpression(
+      'I have a {currency} account',
+      ['currency'],
+      'I have a EUR account'
+    )
+  })
+
+  it('prefers leftmost match when there is overlap', () => {
+    parameterTypeRegistry.defineParameterType(
+      new ParameterType(
+        'currency',
+        /cd/,
+        Currency,
+        s => new Currency(s),
+        true,
+        false
+      )
+    )
+    parameterTypeRegistry.defineParameterType(
+      new ParameterType('date', /bc/, Date, s => new Date(s), true, false)
+    )
+
+    assertExpression('a{date}defg', ['date'], 'abcdefg')
+  })
+
+  // TODO: prefers widest match
+
+  it('generates all combinations of expressions when several parameter types match', () => {
+    parameterTypeRegistry.defineParameterType(
+      new ParameterType(
+        'currency',
+        /x/,
+        null,
+        s => new Currency(s),
+        true,
+        false
+      )
+    )
+    parameterTypeRegistry.defineParameterType(
+      new ParameterType('date', /x/, null, s => new Date(s), true, false)
+    )
+
+    const generatedExpressions = generator.generateExpressions(
+      'I have x and x and another x'
+    )
+    const expressions = generatedExpressions.map(e => e.source)
+    assert.deepEqual(expressions, [
+      'I have {currency} and {currency} and another {currency}',
+      'I have {currency} and {currency} and another {date}',
+      'I have {currency} and {date} and another {currency}',
+      'I have {currency} and {date} and another {date}',
+      'I have {date} and {currency} and another {currency}',
+      'I have {date} and {currency} and another {date}',
+      'I have {date} and {date} and another {currency}',
+      'I have {date} and {date} and another {date}',
+    ])
+  })
+
+  it('exposes parameter type names in generated expression', () => {
+    const expression = generator.generateExpressions(
+      'I have 2 cukes and 1.5 euro'
+    )[0]
+    const typeNames = expression.parameterTypes.map(parameter => parameter.name)
+    assert.deepEqual(typeNames, ['int', 'float'])
+  })
+
+  it('matches parameter types with optional capture groups', () => {
+    parameterTypeRegistry.defineParameterType(
+      new ParameterType(
+        'optional-flight',
+        /(1st flight)?/,
+        null,
+        s => s,
+        true,
+        false
+      )
+    )
+    parameterTypeRegistry.defineParameterType(
+      new ParameterType(
+        'optional-hotel',
+        /(1st hotel)?/,
+        null,
+        s => s,
+        true,
+        false
+      )
+    )
+
+    const expression = generator.generateExpressions(
+      'I reach Stage4: 1st flight-1st hotel'
+    )[0]
+    // While you would expect this to be `I reach Stage{int}: {optional-flight}-{optional-hotel}` the `-1` causes
+    // {int} to match just before {optional-hotel}.
+    assert.equal(
+      expression.source,
+      'I reach Stage{int}: {optional-flight}{int}st hotel'
+    )
+  })
+
+  it('generates at most 256 expressions', () => {
+    for (let i = 0; i < 4; i++) {
+      parameterTypeRegistry.defineParameterType(
+        new ParameterType('my-type-' + i, /[a-z]/, null, s => s, true, false)
+      )
+    }
+    // This would otherwise generate 4^11=419430 expressions and consume just shy of 1.5GB.
+    const expressions = generator.generateExpressions('a simple step')
+    assert.equal(expressions.length, 256)
+  })
+
+  it('prefers expression with longest non empty match', () => {
+    parameterTypeRegistry.defineParameterType(
+      new ParameterType('zero-or-more', /[a-z]*/, null, s => s, true, false)
+    )
+    parameterTypeRegistry.defineParameterType(
+      new ParameterType('exactly-one', /[a-z]/, null, s => s, true, false)
+    )
+
+    const expressions = generator.generateExpressions('a simple step')
+    assert.equal(expressions.length, 2)
+    assert.equal(
+      expressions[0].source,
+      '{exactly-one} {zero-or-more} {zero-or-more}'
+    )
+    assert.equal(
+      expressions[1].source,
+      '{zero-or-more} {zero-or-more} {zero-or-more}'
+    )
+  })
+})

node_modules/cucumber-expressions/test/cucumber_expression_regexp_test.js

@@ -0,0 +1,52 @@
+/* eslint-env mocha */
+const assert = require('assert')
+const CucumberExpression = require('../src/cucumber_expression')
+const ParameterTypeRegistry = require('../src/parameter_type_registry')
+
+describe('CucumberExpression', () => {
+  describe('RegExp translation', () => {
+    it('translates no arguments', () => {
+      assertRegexp(
+        'I have 10 cukes in my belly now',
+        /^I have 10 cukes in my belly now$/
+      )
+    })
+
+    it('translates alternation', () => {
+      assertRegexp(
+        'I had/have a great/nice/charming friend',
+        /^I (?:had|have) a (?:great|nice|charming) friend$/
+      )
+    })
+
+    it('translates alternation with non-alpha', () => {
+      assertRegexp('I said Alpha1/Beta1', /^I said (?:Alpha1|Beta1)$/)
+    })
+
+    it('translates parameters', () => {
+      assertRegexp(
+        "I have {float} cukes at {int} o'clock",
+        /^I have (-?\d*\.\d+) cukes at ((?:-?\d+)|(?:\d+)) o'clock$/
+      )
+    })
+
+    it('translates parenthesis to non-capturing optional capture group', () => {
+      assertRegexp(
+        'I have many big(ish) cukes',
+        /^I have many big(?:ish)? cukes$/
+      )
+    })
+
+    it('translates parenthesis with alpha unicode', () => {
+      assertRegexp('Привет, Мир(ы)!', /^Привет, Мир(?:ы)?!$/)
+    })
+  })
+})
+
+const assertRegexp = (expression, expectedRegexp) => {
+  const cucumberExpression = new CucumberExpression(
+    expression,
+    new ParameterTypeRegistry()
+  )
+  assert.deepEqual(cucumberExpression.regexp, expectedRegexp)
+}

node_modules/cucumber-expressions/test/cucumber_expression_test.js

@@ -0,0 +1,270 @@
+/* eslint-env mocha */
+const assert = require('assert')
+const {
+  CucumberExpression,
+  ParameterTypeRegistry,
+  ParameterType,
+} = require('../src/index')
+
+describe('CucumberExpression', () => {
+  it('documents match arguments', () => {
+    const parameterTypeRegistry = new ParameterTypeRegistry()
+
+    /// [capture-match-arguments]
+    const expr = 'I have {int} cuke(s)'
+    const expression = new CucumberExpression(expr, parameterTypeRegistry)
+    const args = expression.match('I have 7 cukes')
+    assert.equal(7, args[0].getValue(null))
+    /// [capture-match-arguments]
+  })
+
+  it('matches word', () => {
+    assert.deepEqual(match('three {word} mice', 'three blind mice'), ['blind'])
+  })
+
+  it('matches double quoted string', () => {
+    assert.deepEqual(match('three {string} mice', 'three "blind" mice'), [
+      'blind',
+    ])
+  })
+
+  it('matches multiple double quoted strings', () => {
+    assert.deepEqual(
+      match(
+        'three {string} and {string} mice',
+        'three "blind" and "crippled" mice'
+      ),
+      ['blind', 'crippled']
+    )
+  })
+
+  it('matches single quoted string', () => {
+    assert.deepEqual(match('three {string} mice', "three 'blind' mice"), [
+      'blind',
+    ])
+  })
+
+  it('matches multiple single quoted strings', () => {
+    assert.deepEqual(
+      match(
+        'three {string} and {string} mice',
+        "three 'blind' and 'crippled' mice"
+      ),
+      ['blind', 'crippled']
+    )
+  })
+
+  it('does not match misquoted string', () => {
+    assert.deepEqual(match('three {string} mice', 'three "blind\' mice'), null)
+  })
+
+  it('matches single quoted string with double quotes', () => {
+    assert.deepEqual(match('three {string} mice', 'three \'"blind"\' mice'), [
+      '"blind"',
+    ])
+  })
+
+  it('matches double quoted string with single quotes', () => {
+    assert.deepEqual(match('three {string} mice', 'three "\'blind\'" mice'), [
+      "'blind'",
+    ])
+  })
+
+  it('matches double quoted string with escaped double quote', () => {
+    assert.deepEqual(match('three {string} mice', 'three "bl\\"nd" mice'), [
+      'bl"nd',
+    ])
+  })
+
+  it('matches single quoted string with escaped single quote', () => {
+    assert.deepEqual(match('three {string} mice', "three 'bl\\'nd' mice"), [
+      "bl'nd",
+    ])
+  })
+
+  it('matches single quoted string with escaped single quote', () => {
+    assert.deepEqual(match('three {string} mice', "three 'bl\\'nd' mice"), [
+      "bl'nd",
+    ])
+  })
+
+  it('matches escaped parenthesis', () => {
+    assert.deepEqual(
+      match(
+        'three \\(exceptionally) {string} mice',
+        'three (exceptionally) "blind" mice'
+      ),
+      ['blind']
+    )
+  })
+
+  it('matches escaped slash', () => {
+    assert.deepEqual(match('12\\/2020', '12/2020'), [])
+  })
+
+  it('matches int', () => {
+    assert.deepEqual(match('{int}', '22'), [22])
+  })
+
+  it("doesn't match float as int", () => {
+    assert.deepEqual(match('{int}', '1.22'), null)
+  })
+
+  it('matches float', () => {
+    assert.deepEqual(match('{float}', '0.22'), [0.22])
+    assert.deepEqual(match('{float}', '.22'), [0.22])
+  })
+
+  it('matches anonymous', () => {
+    assert.deepEqual(match('{}', '0.22'), ['0.22'])
+  })
+
+  it('throws unknown parameter type', () => {
+    try {
+      match('{unknown}', 'something')
+      assert.fail()
+    } catch (expected) {
+      assert.equal(expected.message, 'Undefined parameter type {unknown}')
+    }
+  })
+
+  it('does not allow optional parameter types', () => {
+    try {
+      match('({int})', '3')
+      assert.fail()
+    } catch (expected) {
+      assert.equal(
+        expected.message,
+        'Parameter types cannot be optional: ({int})'
+      )
+    }
+  })
+
+  it('allows escaped optional parameter types', () => {
+    assert.deepEqual(match('\\({int})', '(3)'), [3])
+  })
+
+  it('does not allow text/parameter type alternation', () => {
+    try {
+      match('x/{int}', '3')
+      assert.fail()
+    } catch (expected) {
+      assert.equal(
+        expected.message,
+        'Parameter types cannot be alternative: x/{int}'
+      )
+    }
+  })
+
+  it('does not allow parameter type/text alternation', () => {
+    try {
+      match('{int}/x', '3')
+      assert.fail()
+    } catch (expected) {
+      assert.equal(
+        expected.message,
+        'Parameter types cannot be alternative: {int}/x'
+      )
+    }
+  })
+
+  for (const c of '[]()$.|?*+'.split('')) {
+    it(`does not allow parameter type with ${c}`, () => {
+      try {
+        match(`{${c}string}`, 'something')
+        assert.fail()
+      } catch (expected) {
+        assert.equal(
+          expected.message,
+          `Illegal character '${c}' in parameter name {${c}string}`
+        )
+      }
+    })
+  }
+
+  it('exposes source', () => {
+    const expr = 'I have {int} cuke(s)'
+    assert.equal(
+      new CucumberExpression(expr, new ParameterTypeRegistry()).source,
+      expr
+    )
+  })
+
+  // JavaScript-specific
+
+  it('delegates transform to custom object', () => {
+    const parameterTypeRegistry = new ParameterTypeRegistry()
+    parameterTypeRegistry.defineParameterType(
+      new ParameterType(
+        'widget',
+        /\w+/,
+        null,
+        function(s) {
+          return this.createWidget(s)
+        },
+        false,
+        true
+      )
+    )
+    const expression = new CucumberExpression(
+      'I have a {widget}',
+      parameterTypeRegistry
+    )
+
+    const world = {
+      createWidget(s) {
+        return `widget:${s}`
+      },
+    }
+
+    const args = expression.match(`I have a bolt`)
+    assert.equal(args[0].getValue(world), 'widget:bolt')
+  })
+
+  describe('escapes special characters', () => {
+    ;['\\', '[', ']', '^', '$', '.', '|', '?', '*', '+'].forEach(character => {
+      it(`escapes ${character}`, () => {
+        const expr = `I have {int} cuke(s) and ${character}`
+        const expression = new CucumberExpression(
+          expr,
+          new ParameterTypeRegistry()
+        )
+        const arg1 = expression.match(`I have 800 cukes and ${character}`)[0]
+        assert.equal(arg1.getValue(null), 800)
+      })
+    })
+
+    it(`escapes .`, () => {
+      const expr = `I have {int} cuke(s) and .`
+      const expression = new CucumberExpression(
+        expr,
+        new ParameterTypeRegistry()
+      )
+      assert.equal(expression.match(`I have 800 cukes and 3`), null)
+      const arg1 = expression.match(`I have 800 cukes and .`)[0]
+      assert.equal(arg1.getValue(null), 800)
+    })
+
+    it(`escapes |`, () => {
+      const expr = `I have {int} cuke(s) and a|b`
+      const expression = new CucumberExpression(
+        expr,
+        new ParameterTypeRegistry()
+      )
+      assert.equal(expression.match(`I have 800 cukes and a`), null)
+      assert.equal(expression.match(`I have 800 cukes and b`), null)
+      const arg1 = expression.match(`I have 800 cukes and a|b`)[0]
+      assert.equal(arg1.getValue(null), 800)
+    })
+  })
+})
+
+const match = (expression, text) => {
+  const cucumberExpression = new CucumberExpression(
+    expression,
+    new ParameterTypeRegistry()
+  )
+  const args = cucumberExpression.match(text)
+  if (!args) return null
+  return args.map(arg => arg.getValue(null))
+}

node_modules/cucumber-expressions/test/custom_parameter_type_test.js

@@ -0,0 +1,258 @@
+/* eslint-env mocha */
+'use strict'
+
+const assert = require('assert')
+const assertThrows = require('./assert_throws')
+const CucumberExpression = require('../src/cucumber_expression')
+const RegularExpression = require('../src/regular_expression')
+const ParameterTypeRegistry = require('../src/parameter_type_registry')
+const ParameterType = require('../src/parameter_type')
+require('@babel/polyfill')
+
+class Color {
+  /// [color-constructor]
+  constructor(name) {
+    this.name = name
+  }
+  /// [color-constructor]
+}
+
+class CssColor {
+  constructor(name) {
+    this.name = name
+  }
+}
+
+describe('Custom parameter type', () => {
+  let parameterTypeRegistry
+
+  beforeEach(() => {
+    parameterTypeRegistry = new ParameterTypeRegistry()
+    /* eslint-disable prettier/prettier */
+    /// [add-color-parameter-type]
+    parameterTypeRegistry.defineParameterType(
+      new ParameterType(
+        'color',           // name
+        /red|blue|yellow/, // regexp
+        Color,             // type
+        s => new Color(s), // transformer
+        false,             // useForSnippets
+        true               // preferForRegexpMatch
+      )
+    )
+    /// [add-color-parameter-type]
+    /* eslint-enable prettier/prettier */
+  })
+
+  describe('CucumberExpression', () => {
+    it('throws exception for illegal character in parameter name', () => {
+      assertThrows(
+        () => new ParameterType('[string]', /.*/, String, s => s, false, true),
+        "Illegal character '[' in parameter name {[string]}"
+      )
+    })
+
+    it('matches parameters with custom parameter type', () => {
+      const expression = new CucumberExpression(
+        'I have a {color} ball',
+        parameterTypeRegistry
+      )
+      const value = expression.match('I have a red ball')[0].getValue(null)
+      assert.equal(value.name, 'red')
+    })
+
+    it('matches parameters with multiple capture groups', () => {
+      class Coordinate {
+        constructor(x, y, z) {
+          this.x = x
+          this.y = y
+          this.z = z
+        }
+      }
+
+      parameterTypeRegistry.defineParameterType(
+        new ParameterType(
+          'coordinate',
+          /(\d+),\s*(\d+),\s*(\d+)/,
+          Coordinate,
+          (x, y, z) => new Coordinate(parseInt(x), parseInt(y), parseInt(z)),
+          true,
+          true
+        )
+      )
+      const expression = new CucumberExpression(
+        'A {int} thick line from {coordinate} to {coordinate}',
+        parameterTypeRegistry
+      )
+      const args = expression.match('A 5 thick line from 10,20,30 to 40,50,60')
+
+      const thick = args[0].getValue(null)
+      assert.equal(thick, 5)
+
+      const from = args[1].getValue(null)
+      assert.equal(from.x, 10)
+      assert.equal(from.y, 20)
+      assert.equal(from.z, 30)
+
+      const to = args[2].getValue(null)
+      assert.equal(to.x, 40)
+      assert.equal(to.y, 50)
+      assert.equal(to.z, 60)
+    })
+
+    it('matches parameters with custom parameter type using optional capture group', () => {
+      parameterTypeRegistry = new ParameterTypeRegistry()
+      parameterTypeRegistry.defineParameterType(
+        new ParameterType(
+          'color',
+          [/red|blue|yellow/, /(?:dark|light) (?:red|blue|yellow)/],
+          Color,
+          s => new Color(s),
+          false,
+          true
+        )
+      )
+      const expression = new CucumberExpression(
+        'I have a {color} ball',
+        parameterTypeRegistry
+      )
+      const value = expression.match('I have a dark red ball')[0].getValue(null)
+      assert.equal(value.name, 'dark red')
+    })
+
+    it('defers transformation until queried from argument', () => {
+      parameterTypeRegistry.defineParameterType(
+        new ParameterType(
+          'throwing',
+          /bad/,
+          null,
+          s => {
+            throw new Error(`Can't transform [${s}]`)
+          },
+          false,
+          true
+        )
+      )
+
+      const expression = new CucumberExpression(
+        'I have a {throwing} parameter',
+        parameterTypeRegistry
+      )
+      const args = expression.match('I have a bad parameter')
+      assertThrows(() => args[0].getValue(null), "Can't transform [bad]")
+    })
+
+    describe('conflicting parameter type', () => {
+      it('is detected for type name', () => {
+        assertThrows(
+          () =>
+            parameterTypeRegistry.defineParameterType(
+              new ParameterType(
+                'color',
+                /.*/,
+                CssColor,
+                s => new CssColor(s),
+                false,
+                true
+              )
+            ),
+          'There is already a parameter type with name color'
+        )
+      })
+
+      it('is not detected for type', () => {
+        parameterTypeRegistry.defineParameterType(
+          new ParameterType(
+            'whatever',
+            /.*/,
+            Color,
+            s => new Color(s),
+            false,
+            false
+          )
+        )
+      })
+
+      it('is not detected for regexp', () => {
+        parameterTypeRegistry.defineParameterType(
+          new ParameterType(
+            'css-color',
+            /red|blue|yellow/,
+            CssColor,
+            s => new CssColor(s),
+            true,
+            false
+          )
+        )
+
+        assert.equal(
+          new CucumberExpression(
+            'I have a {css-color} ball',
+            parameterTypeRegistry
+          )
+            .match('I have a blue ball')[0]
+            .getValue(null).constructor,
+          CssColor
+        )
+        assert.equal(
+          new CucumberExpression(
+            'I have a {css-color} ball',
+            parameterTypeRegistry
+          )
+            .match('I have a blue ball')[0]
+            .getValue(null).name,
+          'blue'
+        )
+        assert.equal(
+          new CucumberExpression('I have a {color} ball', parameterTypeRegistry)
+            .match('I have a blue ball')[0]
+            .getValue(null).constructor,
+          Color
+        )
+        assert.equal(
+          new CucumberExpression('I have a {color} ball', parameterTypeRegistry)
+            .match('I have a blue ball')[0]
+            .getValue(null).name,
+          'blue'
+        )
+      })
+    })
+
+    // JavaScript-specific
+    it('creates arguments using async transform', async () => {
+      parameterTypeRegistry = new ParameterTypeRegistry()
+      /// [add-async-parameter-type]
+      parameterTypeRegistry.defineParameterType(
+        new ParameterType(
+          'asyncColor',
+          /red|blue|yellow/,
+          Color,
+          async s => new Color(s),
+          false,
+          true
+        )
+      )
+      /// [add-async-parameter-type]
+
+      const expression = new CucumberExpression(
+        'I have a {asyncColor} ball',
+        parameterTypeRegistry
+      )
+      const args = await expression.match('I have a red ball')
+      const value = await args[0].getValue(null)
+      assert.equal(value.name, 'red')
+    })
+  })
+
+  describe('RegularExpression', () => {
+    it('matches arguments with custom parameter type', () => {
+      const expression = new RegularExpression(
+        /I have a (red|blue|yellow) ball/,
+        parameterTypeRegistry
+      )
+      const value = expression.match('I have a red ball')[0].getValue(null)
+      assert.equal(value.constructor, Color)
+      assert.equal(value.name, 'red')
+    })
+  })
+})

node_modules/cucumber-expressions/test/expression_examples_test.js

@@ -0,0 +1,30 @@
+/* eslint-env mocha */
+const fs = require('fs')
+const assert = require('assert')
+const CucumberExpression = require('../src/cucumber_expression')
+const RegularExpression = require('../src/regular_expression')
+const ParameterTypeRegistry = require('../src/parameter_type_registry')
+
+describe('examples.txt', () => {
+  const match = (expression_text, text) => {
+    const m = /\/(.*)\//.exec(expression_text)
+    const expression = m
+      ? new RegularExpression(new RegExp(m[1]), new ParameterTypeRegistry())
+      : new CucumberExpression(expression_text, new ParameterTypeRegistry())
+    const args = expression.match(text)
+    if (!args) return null
+    return args.map(arg => arg.getValue(null))
+  }
+
+  const examples = fs.readFileSync('examples.txt', 'utf-8')
+  const chunks = examples.split(/^---/m)
+  for (const chunk of chunks) {
+    const [expressionText, text, expectedArgs] = chunk.trim().split(/\n/m)
+    it(`Works with: ${expressionText}`, () => {
+      assert.deepEqual(
+        JSON.stringify(match(expressionText, text)),
+        expectedArgs
+      )
+    })
+  }
+})

node_modules/cucumber-expressions/test/mocha.opts

@@ -0,0 +1 @@
+--recursive

node_modules/cucumber-expressions/test/parameter_type_registry_test.js

@@ -0,0 +1,99 @@
+/* eslint-env mocha */
+
+const assert = require('assert')
+const ParameterTypeRegistry = require('../src/parameter_type_registry')
+const ParameterType = require('../src/parameter_type')
+
+class Name {}
+class Person {}
+class Place {}
+
+const CAPITALISED_WORD = /[A-Z]+\w+/
+
+describe('ParameterTypeRegistry', () => {
+  let registry
+  beforeEach(() => {
+    registry = new ParameterTypeRegistry()
+  })
+
+  it('does not allow more than one preferential parameter type for each regexp', () => {
+    registry.defineParameterType(
+      new ParameterType(
+        'name',
+        CAPITALISED_WORD,
+        Name,
+        s => new Name(s),
+        true,
+        true
+      )
+    )
+    registry.defineParameterType(
+      new ParameterType(
+        'person',
+        CAPITALISED_WORD,
+        Person,
+        s => new Person(s),
+        true,
+        false
+      )
+    )
+    try {
+      registry.defineParameterType(
+        new ParameterType(
+          'place',
+          CAPITALISED_WORD,
+          Place,
+          s => new Place(s),
+          true,
+          true
+        )
+      )
+      throw new Error('Should have failed')
+    } catch (err) {
+      assert.equal(
+        err.message,
+        `There can only be one preferential parameter type per regexp. The regexp ${CAPITALISED_WORD} is used for two preferential parameter types, {name} and {place}`
+      )
+    }
+  })
+
+  it('looks up preferential parameter type by regexp', () => {
+    const name = new ParameterType(
+      'name',
+      /[A-Z]+\w+/,
+      null,
+      s => new Name(s),
+      true,
+      false
+    )
+    const person = new ParameterType(
+      'person',
+      /[A-Z]+\w+/,
+      null,
+      s => new Person(s),
+      true,
+      true
+    )
+    const place = new ParameterType(
+      'place',
+      /[A-Z]+\w+/,
+      null,
+      s => new Place(s),
+      true,
+      false
+    )
+
+    registry.defineParameterType(name)
+    registry.defineParameterType(person)
+    registry.defineParameterType(place)
+
+    assert.equal(
+      registry.lookupByRegexp(
+        '[A-Z]+\\w+',
+        /([A-Z]+\w+) and ([A-Z]+\w+)/,
+        'Lisa and Bob'
+      ),
+      person
+    )
+  })
+})

node_modules/cucumber-expressions/test/parameter_type_test.js

@@ -0,0 +1,20 @@
+/* eslint-env mocha */
+const assertThrows = require('./assert_throws')
+const ParameterType = require('../src/parameter_type')
+
+describe('ParameterType', () => {
+  it('does not allow ignore flag on regexp', () => {
+    assertThrows(
+      () =>
+        new ParameterType(
+          'case-insensitive',
+          /[a-z]+/i,
+          String,
+          s => s,
+          true,
+          true
+        ),
+      "ParameterType Regexps can't use flag 'i'"
+    )
+  })
+})

node_modules/cucumber-expressions/test/regular_expression_test.js

@@ -0,0 +1,106 @@
+/* eslint-env mocha */
+const assert = require('assert')
+const RegularExpression = require('../src/regular_expression')
+const ParameterTypeRegistry = require('../src/parameter_type_registry')
+
+describe('RegularExpression', () => {
+  it('documents match arguments', () => {
+    const parameterRegistry = new ParameterTypeRegistry()
+
+    /// [capture-match-arguments]
+    const expr = /I have (\d+) cukes? in my (\w+) now/
+    const expression = new RegularExpression(expr, parameterRegistry)
+    const args = expression.match('I have 7 cukes in my belly now')
+    assert.equal(7, args[0].getValue(null))
+    assert.equal('belly', args[1].getValue(null))
+    /// [capture-match-arguments]
+  })
+
+  it('does no transform by default', () => {
+    assert.deepEqual(match(/(\d\d)/, '22')[0], '22')
+  })
+
+  it('does not transform anonymous', () => {
+    assert.deepEqual(match(/(.*)/, '22')[0], '22')
+  })
+
+  it('transforms negative int', () => {
+    assert.deepEqual(match(/(-?\d+)/, '-22')[0], -22)
+  })
+
+  it('transforms positive int', () => {
+    assert.deepEqual(match(/(\d+)/, '22')[0], 22)
+  })
+
+  it('transforms float without integer part', () => {
+    assert.deepEqual(match(/(-?\d*\.?\d+)/, '.22')[0], 0.22)
+  })
+
+  it('transforms float with sign', () => {
+    assert.deepEqual(match(/(-?\d*\.?\d+)/, '-1.22')[0], -1.22)
+  })
+
+  it('returns null when there is no match', () => {
+    assert.equal(match(/hello/, 'world'), null)
+  })
+
+  it('matches nested capture group without match', () => {
+    assert.deepEqual(match(/^a user( named "([^"]*)")?$/, 'a user'), [null])
+  })
+
+  it('matches nested capture group with match', () => {
+    assert.deepEqual(
+      match(/^a user( named "([^"]*)")?$/, 'a user named "Charlie"'),
+      ['Charlie']
+    )
+  })
+
+  it('matches capture group nested in optional one', () => {
+    const regexp = /^a (pre-commercial transaction |pre buyer fee model )?purchase(?: for \$(\d+))?$/
+    assert.deepEqual(match(regexp, 'a purchase'), [null, null])
+    assert.deepEqual(match(regexp, 'a purchase for $33'), [null, 33])
+    assert.deepEqual(match(regexp, 'a pre buyer fee model purchase'), [
+      'pre buyer fee model ',
+      null,
+    ])
+  })
+
+  it('ignores non capturing groups', () => {
+    assert.deepEqual(
+      match(
+        /(\S+) ?(can|cannot)? (?:delete|cancel) the (\d+)(?:st|nd|rd|th) (attachment|slide) ?(?:upload)?/,
+        'I can cancel the 1st slide upload'
+      ),
+      ['I', 'can', 1, 'slide']
+    )
+  })
+
+  it('works with escaped parenthesis', () => {
+    assert.deepEqual(match(/Across the line\(s\)/, 'Across the line(s)'), [])
+  })
+
+  it('exposes regexp and source', () => {
+    const regexp = /I have (\d+) cukes? in my (.+) now/
+    let expression = new RegularExpression(regexp, new ParameterTypeRegistry())
+    assert.deepEqual(expression.regexp, regexp)
+    assert.deepEqual(expression.source, regexp.source)
+  })
+
+  it('does not take consider parenthesis in character class as group', function() {
+    const expression = new RegularExpression(
+      /^drawings: ([A-Z_, ()]+)$/,
+      new ParameterTypeRegistry()
+    )
+    const args = expression.match('drawings: ONE, TWO(ABC)')
+
+    assert.equal(args[0].getValue(), 'ONE, TWO(ABC)')
+  })
+})
+
+const match = (regexp, text) => {
+  const parameterRegistry = new ParameterTypeRegistry()
+  const regularExpression = new RegularExpression(regexp, parameterRegistry)
+  const args = regularExpression.match(text)
+  if (!args) return null
+  return args.map(arg => arg.getValue(null))
+}

node_modules/cucumber-expressions/test/tree_regexp_test.js

@@ -0,0 +1,100 @@
+/* eslint-env mocha */
+const assert = require('assert')
+const TreeRegexp = require('../src/tree_regexp')
+
+describe('TreeRegexp', () => {
+  it('exposes group source', () => {
+    const tr = new TreeRegexp(/(a(?:b)?)(c)/)
+    assert.deepEqual(tr.groupBuilder.children.map(gb => gb.source), [
+      'a(?:b)?',
+      'c',
+    ])
+  })
+
+  it('builds tree', () => {
+    const tr = new TreeRegexp(/(a(?:b)?)(c)/)
+    const group = tr.match('ac')
+    assert.equal(group.value, 'ac')
+    assert.equal(group.children[0].value, 'a')
+    assert.deepEqual(group.children[0].children, [])
+    assert.equal(group.children[1].value, 'c')
+  })
+
+  it('ignores non-capturing groups', () => {
+    const tr = new TreeRegexp(/(a(?:b)?)(c)/)
+    const group = tr.match('ac')
+    assert.equal(group.value, 'ac')
+    assert.equal(group.children[0].value, 'a')
+    assert.deepEqual(group.children[0].children, [])
+    assert.equal(group.children[1].value, 'c')
+  })
+
+  it('matches optional group', () => {
+    const tr = new TreeRegexp(/^Something( with an optional argument)?/)
+    const group = tr.match('Something')
+    assert.equal(group.children[0].value, null)
+  })
+
+  it('matches nested groups', () => {
+    const tr = new TreeRegexp(
+      /^A (\d+) thick line from ((\d+),\s*(\d+),\s*(\d+)) to ((\d+),\s*(\d+),\s*(\d+))/
+    )
+    const group = tr.match('A 5 thick line from 10,20,30 to 40,50,60')
+
+    assert.equal(group.children[0].value, '5')
+    assert.equal(group.children[1].value, '10,20,30')
+    assert.equal(group.children[1].children[0].value, '10')
+    assert.equal(group.children[1].children[1].value, '20')
+    assert.equal(group.children[1].children[2].value, '30')
+    assert.equal(group.children[2].value, '40,50,60')
+    assert.equal(group.children[2].children[0].value, '40')
+    assert.equal(group.children[2].children[1].value, '50')
+    assert.equal(group.children[2].children[2].value, '60')
+  })
+
+  it('detects multiple non capturing groups', () => {
+    const tr = new TreeRegexp(/(?:a)(:b)(\?c)(d)/)
+    const group = tr.match('a:b?cd')
+    assert.equal(group.children.length, 3)
+  })
+
+  it('works with escaped backslash', () => {
+    const tr = new TreeRegexp(/foo\\(bar|baz)/)
+    const group = tr.match('foo\\bar')
+    assert.equal(group.children.length, 1)
+  })
+
+  it('works with escaped slash', () => {
+    const tr = new TreeRegexp(/^I go to '\/(.+)'$/)
+    const group = tr.match("I go to '/hello'")
+    assert.equal(group.children.length, 1)
+  })
+
+  it('works with digit and word', () => {
+    const tr = new TreeRegexp(/^(\d) (\w+)$/)
+    const group = tr.match('2 you')
+    assert.equal(group.children.length, 2)
+  })
+
+  it('captures non capturing groups with capturing groups inside', () => {
+    const tr = new TreeRegexp('the stdout(?: from "(.*?)")?')
+    const group = tr.match('the stdout')
+    assert.equal(group.value, 'the stdout')
+    assert.equal(group.children[0].value, null)
+    assert.equal(group.children.length, 1)
+  })
+
+  it('works with flags', () => {
+    const tr = new TreeRegexp(/HELLO/i)
+    const group = tr.match('hello')
+    assert.equal(group.value, 'hello')
+  })
+
+  it('does not consider parenthesis in character class as group', () => {
+    const tr = new TreeRegexp(/^drawings: ([A-Z, ()]+)$/)
+    const group = tr.match('drawings: ONE(TWO)')
+    assert.equal(group.value, 'drawings: ONE(TWO)')
+    assert.equal(group.children.length, 1)
+    assert.equal(group.children[0].value, 'ONE(TWO)')
+  })
+})