app/tests/units/services/rights/abilityBuilder.test.ts

import { describe, test, expect, vi, beforeEach } from 'vitest'
//@ts-expect-error false error
import type { MongoAbility } from '@casl/ability/dist/types/Ability'
import type { AbilitiesType, AccessProfile } from '~/types/interfaces'
import AbilityBuilder from '~/services/rights/abilityBuilder'
import { ABILITIES } from '~/types/enum/enums'
import type OrganizationProfile from '~/models/Organization/OrganizationProfile'

// Mock the abilities config to return only test data
vi.mock('~/config/abilities/config-precompiled', () => {
  return {
    default: {
      subject1: {
        action: 'display',
        conditions: [
          { function: 'accessHasAnyProfile', parameters: ['guardian'] },
        ],
      },
      subject2: {
        action: 'display',
        conditions: [{ function: 'organizationIsSchool' }],
      },
    },
  }
})

let ability: MongoAbility
let accessProfile: AccessProfile
let organizationProfile: OrganizationProfile
let abilityBuilder: AbilityBuilder

// Mock the content of the config yaml files
// > This must be done in the global scope: https://vitest.dev/api/vi.html#vi-mock
const doc = {
  abilities: {
    subject1: {
      action: ABILITIES.READ,
      conditions: [
        {
          function: 'fct1',
          parameters: ['param1'],
          expectedResult: true,
        },
      ],
    },
    subject2: {
      action: ABILITIES.READ,
      conditions: {
        function: 'fct2',
        parameters: ['param2'],
        expectedResult: false,
      },
    },
  },
}

vi.mock('yaml-import', () => {
  return {
    read: vi.fn((data: string) => doc),
  }
})

beforeEach(() => {
  ability = vi.fn() as any as MongoAbility
  accessProfile = vi.fn() as any as AccessProfile
  organizationProfile = vi.fn() as any as OrganizationProfile

  abilityBuilder = new AbilityBuilder(
    ability,
    accessProfile,
    organizationProfile,
  )
})

describe('buildAbilities', () => {
  test('base call', () => {
    const roleAbilities: Array<AbilitiesType> = [
      { action: ABILITIES.READ, subject: 'subject1' },
      { action: ABILITIES.READ, subject: 'subject2' },
    ]
    const configAbilities: Array<AbilitiesType> = [
      { action: ABILITIES.READ, subject: 'subject3' },
      { action: ABILITIES.READ, subject: 'subject4' },
    ]
    const allAbilities: Array<AbilitiesType> =
      roleAbilities.concat(configAbilities)

    abilityBuilder.buildAbilitiesFromRoles = vi.fn(() => roleAbilities)
    abilityBuilder.buildAbilitiesFromConfig = vi.fn(() => configAbilities)

    ability.update = vi.fn()

    const result = abilityBuilder.buildAbilities()

    expect(ability.update).toHaveBeenCalledTimes(2)
    expect(ability.update).toHaveBeenCalledWith(roleAbilities)
    expect(ability.update).toHaveBeenCalledWith(allAbilities)

    expect(abilityBuilder.buildAbilitiesFromRoles).toHaveBeenCalledOnce()
    expect(abilityBuilder.buildAbilitiesFromConfig).toHaveBeenCalledOnce()

    expect(result).toEqual(allAbilities)
  })
})

describe('buildAbilitiesFromRoles', () => {
  test('calls roleUtils', () => {
    accessProfile.roles = [
      'ROLE_EVENTS_VIEW',
      'ROLE_COURSES',
      'ROLE_TEACHER_CORE',
      'ROLE_OTHER',
    ]

    const expected = [
      { subject: 'events', action: 'read' },
      { subject: 'courses', action: 'manage' },
      { subject: 'other', action: 'manage' },
    ]

    expect(abilityBuilder.buildAbilitiesFromRoles()).toEqual(expected)
  })
})

describe('buildAbilitiesFromConfig', () => {
  test('calls roleUtils', () => {
    abilityBuilder.hasConfigAbility = vi.fn(() => true)

    expect(abilityBuilder.buildAbilitiesFromConfig()).toEqual([
      { action: 'display', subject: 'subject1', inverted: false },
      { action: 'display', subject: 'subject2', inverted: false },
    ])
  })
})

describe('hasConfigAbility', () => {
  beforeEach(() => {
    accessProfile.isGuardian = true
    organizationProfile.isSchool = true
    organizationProfile.isCmf = false
  })
  test('fulfill all conditions', () => {
    const conditions = [
      { function: 'accessHasAnyProfile', parameters: ['guardian', 'payer'] },
      { function: 'organizationIsSchool' },
    ]

    expect(abilityBuilder.hasConfigAbility(conditions)).toBeTruthy()
  })
  test('fulfill at least one condition', () => {
    const conditions = [
      { function: 'accessHasAnyProfile', parameters: ['guardian', 'payer'] },
      { function: 'organizationIsCmf' },
    ]

    expect(abilityBuilder.hasConfigAbility(conditions)).toBeFalsy()
  })
  test('fulfill none of the conditions', () => {
    const conditions = [{ function: 'organizationIsCmf' }]

    expect(abilityBuilder.hasConfigAbility(conditions)).toBeFalsy()
  })
})

describe('execAndValidateCondition', () => {
  test('accessHasAllRoleAbilities', () => {
    ability.can = vi.fn((action: string, subject: string) => {
      return (
        action === 'read' && (subject === 'subject1' || subject === 'subject2')
      )
    })

    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'accessHasAllRoleAbilities',
        parameters: [
          { action: ABILITIES.READ, subject: 'subject1' },
          { action: ABILITIES.READ, subject: 'subject2' },
        ],
      }),
    ).toBeTruthy()

    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'accessHasAllRoleAbilities',
        parameters: [
          { action: ABILITIES.READ, subject: 'subject1' },
          { action: ABILITIES.READ, subject: 'subject3' },
        ],
      }),
    ).toBeFalsy()
  })

  test('accessHasAnyRoleAbility', () => {
    ability.can = vi.fn((action: string, subject: string) => {
      return action === 'read' && subject === 'subject1'
    })

    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'accessHasAnyRoleAbility',
        parameters: [
          { action: ABILITIES.READ, subject: 'subject1' },
          { action: ABILITIES.READ, subject: 'subject2' },
        ],
      }),
    ).toBeTruthy()

    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'accessHasAnyRoleAbility',
        parameters: [{ action: ABILITIES.READ, subject: 'subject2' }],
      }),
    ).toBeFalsy()
  })

  test('accessHasAnyProfile', () => {
    accessProfile.isMember = true
    accessProfile.isGuardian = true
    accessProfile.isPayer = true

    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'accessHasAnyProfile',
        parameters: ['guardian', 'payer'],
      }),
    ).toBeTruthy()

    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'accessHasAnyProfile',
        parameters: ['guardian', 'caMember'],
      }),
    ).toBeTruthy()

    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'accessHasAnyProfile',
        parameters: ['caMember'],
      }),
    ).toBeFalsy()
  })

  test('organizationHasAllModules', () => {
    // @ts-expect-error for testing purposes
    organizationProfile.hasModule = vi.fn(
      (module: string) => module === 'module1' || module === 'module2',
    )

    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'organizationHasAllModules',
        parameters: ['module1', 'module2'],
      }),
    ).toBeTruthy()

    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'organizationHasAllModules',
        parameters: ['module1', 'module3'],
      }),
    ).toBeFalsy()

    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'organizationHasAllModules',
        parameters: ['module3'],
      }),
    ).toBeFalsy()
  })

  test('organizationHasAnyModule', () => {
    // @ts-expect-error accessing non-existent property for testing purposes
    organizationProfile.hasModule = vi.fn(
      (module: string) => module === 'module1' || module === 'module2',
    )

    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'organizationHasAnyModule',
        parameters: ['module1', 'module2'],
      }),
    ).toBeTruthy()

    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'organizationHasAnyModule',
        parameters: ['module1', 'module3'],
      }),
    ).toBeTruthy()

    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'organizationHasAnyModule',
        parameters: ['module3'],
      }),
    ).toBeFalsy()
  })

  test('organizationHasAnyModule', () => {
    accessProfile.isAdminAccount = true
    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'accessIsAdminAccount',
      }),
    ).toBeTruthy()

    accessProfile.isAdminAccount = false
    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'accessIsAdminAccount',
      }),
    ).toBeFalsy()
  })

  test('organizationIsSchool', () => {
    organizationProfile.isSchool = true
    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'organizationIsSchool',
      }),
    ).toBeTruthy()

    organizationProfile.isSchool = false
    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'organizationIsSchool',
      }),
    ).toBeFalsy()
  })

  test('organizationIsArtist', () => {
    organizationProfile.isArtist = true
    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'organizationIsArtist',
      }),
    ).toBeTruthy()

    organizationProfile.isArtist = false
    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'organizationIsArtist',
      }),
    ).toBeFalsy()
  })

  test('organizationIsManagerProduct', () => {
    organizationProfile.isManagerProduct = true
    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'organizationIsManagerProduct',
      }),
    ).toBeTruthy()

    organizationProfile.isManagerProduct = false
    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'organizationIsManagerProduct',
      }),
    ).toBeFalsy()
  })

  test('organizationHasChildren', () => {
    organizationProfile.hasChildren = true
    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'organizationHasChildren',
      }),
    ).toBeTruthy()

    organizationProfile.hasChildren = false
    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'organizationHasChildren',
      }),
    ).toBeFalsy()
  })

  test('organizationIsAssociation', () => {
    organizationProfile.isAssociation = true
    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'organizationIsAssociation',
      }),
    ).toBeTruthy()

    organizationProfile.isAssociation = false
    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'organizationIsAssociation',
      }),
    ).toBeFalsy()
  })

  test('organizationIsShowAdherentList', () => {
    organizationProfile.isShowAdherentList = true
    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'organizationIsShowAdherentList',
      }),
    ).toBeTruthy()

    organizationProfile.isShowAdherentList = false
    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'organizationIsShowAdherentList',
      }),
    ).toBeFalsy()
  })

  test('organizationIsCmf', () => {
    organizationProfile.isCmf = true
    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'organizationIsCmf',
      }),
    ).toBeTruthy()

    organizationProfile.isCmf = false
    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'organizationIsCmf',
      }),
    ).toBeFalsy()
  })

  test('organizationHasWebsite', () => {
    organizationProfile.getWebsite = 'https://example.com'
    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'organizationHasWebsite',
      }),
    ).toBeTruthy()

    organizationProfile.getWebsite = null
    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'organizationHasWebsite',
      }),
    ).toBeFalsy()
  })

  test('with expected result', () => {
    organizationProfile.getWebsite = 'https://example.com'

    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'organizationHasWebsite',
        expectedResult: true,
      }),
    ).toBeTruthy()

    expect(
      // @ts-expect-error accessing protected method for testing purposes
      abilityBuilder.execAndValidateCondition({
        function: 'organizationHasWebsite',
        // @ts-expect-error testing with intentionally wrong type
        expectedResult: 'abc',
      }),
    ).toBeFalsy()
  })

  test('invalid function', () => {
    expect(
      // @ts-expect-error accessing protected method for testing purposes
      () => abilityBuilder.execAndValidateCondition({ function: 'invalid' }),
    ).toThrowError('unknown condition function : invalid')
  })
})

describe('hasRoleAbility', () => {
  beforeEach(() => {
    ability.can = vi.fn((action: string, subject: string) => {
      return action === 'read' && subject === 'a_subject'
    })
  })

  test('owned ability', () => {
    expect(
      abilityBuilder.hasRoleAbility({
        action: ABILITIES.READ,
        subject: 'a_subject',
      }),
    ).toBeTruthy()
  })

  test('not owned ability', () => {
    expect(
      abilityBuilder.hasRoleAbility({
        action: ABILITIES.READ,
        subject: 'other_subject',
      }),
    ).toBeFalsy()
  })
})

describe('hasAllRoleAbilities', () => {
  beforeEach(() => {
    ability.can = vi.fn((action: string, subject: string) => {
      return (
        action === 'read' && (subject === 'subject1' || subject === 'subject2')
      )
    })
  })

  test('own all abilities', () => {
    const result = abilityBuilder.hasAllRoleAbilities([
      { action: ABILITIES.READ, subject: 'subject1' },
      { action: ABILITIES.READ, subject: 'subject2' },
    ])

    expect(result).toBeTruthy()
  })

  test('own at least one ability', () => {
    const result = abilityBuilder.hasAllRoleAbilities([
      { action: ABILITIES.READ, subject: 'subject1' },
      { action: ABILITIES.READ, subject: 'subject3' },
    ])

    expect(result).toBeFalsy()
  })

  test('own none of the abilities', () => {
    const result = abilityBuilder.hasAllRoleAbilities([
      { action: ABILITIES.READ, subject: 'subject3' },
      { action: ABILITIES.READ, subject: 'subject4' },
    ])

    expect(result).toBeFalsy()
  })
})

describe('hasAnyRoleAbility', () => {
  beforeEach(() => {
    ability.can = vi.fn((action: string, subject: string) => {
      return (
        action === 'read' && (subject === 'subject1' || subject === 'subject2')
      )
    })
  })

  test('has all abilities', () => {
    const result = abilityBuilder.hasAnyRoleAbility([
      { action: ABILITIES.READ, subject: 'subject1' },
      { action: ABILITIES.READ, subject: 'subject2' },
    ])

    expect(result).toBeTruthy()
  })

  test('has at least one ability', () => {
    const result = abilityBuilder.hasAnyRoleAbility([
      { action: ABILITIES.READ, subject: 'subject1' },
      { action: ABILITIES.READ, subject: 'subject3' },
    ])

    expect(result).toBeTruthy()
  })

  test('any none of the abilites', () => {
    const result = abilityBuilder.hasAnyRoleAbility([
      { action: ABILITIES.READ, subject: 'subject3' },
      { action: ABILITIES.READ, subject: 'subject4' },
    ])

    expect(result).toBeFalsy()
  })
})

describe('hasProfile', () => {
  test('owned profiles', () => {
    accessProfile.isAdmin = true
    accessProfile.isAdministratifManager = true
    accessProfile.isPedagogicManager = true
    accessProfile.isFinancialManager = true
    accessProfile.isCaMember = true
    accessProfile.isStudent = true
    accessProfile.isTeacher = true
    accessProfile.isMember = true
    accessProfile.isOther = true
    accessProfile.isGuardian = true
    accessProfile.isPayer = true

    expect(abilityBuilder.hasProfile('admin')).toBeTruthy()
    expect(abilityBuilder.hasProfile('administratifManager')).toBeTruthy()
    expect(abilityBuilder.hasProfile('pedagogicManager')).toBeTruthy()
    expect(abilityBuilder.hasProfile('financialManager')).toBeTruthy()
    expect(abilityBuilder.hasProfile('caMember')).toBeTruthy()
    expect(abilityBuilder.hasProfile('student')).toBeTruthy()
    expect(abilityBuilder.hasProfile('teacher')).toBeTruthy()
    expect(abilityBuilder.hasProfile('member')).toBeTruthy()
    expect(abilityBuilder.hasProfile('other')).toBeTruthy()
    expect(abilityBuilder.hasProfile('guardian')).toBeTruthy()
    expect(abilityBuilder.hasProfile('payor')).toBeTruthy()
  })

  test('not owned profiles', () => {
    accessProfile.isAdmin = false
    accessProfile.isAdministratifManager = false
    accessProfile.isPedagogicManager = false
    accessProfile.isFinancialManager = false
    accessProfile.isCaMember = false
    accessProfile.isStudent = false
    accessProfile.isTeacher = false
    accessProfile.isMember = false
    accessProfile.isOther = false
    accessProfile.isGuardian = false
    accessProfile.isPayer = false

    expect(abilityBuilder.hasProfile('admin')).toBeFalsy()
    expect(abilityBuilder.hasProfile('administratifManager')).toBeFalsy()
    expect(abilityBuilder.hasProfile('pedagogicManager')).toBeFalsy()
    expect(abilityBuilder.hasProfile('financialManager')).toBeFalsy()
    expect(abilityBuilder.hasProfile('caMember')).toBeFalsy()
    expect(abilityBuilder.hasProfile('student')).toBeFalsy()
    expect(abilityBuilder.hasProfile('teacher')).toBeFalsy()
    expect(abilityBuilder.hasProfile('member')).toBeFalsy()
    expect(abilityBuilder.hasProfile('other')).toBeFalsy()
    expect(abilityBuilder.hasProfile('guardian')).toBeFalsy()
    expect(abilityBuilder.hasProfile('payor')).toBeFalsy()
  })
})

describe('hasAnyProfile', () => {
  beforeEach(() => {
    accessProfile.isMember = true
    accessProfile.isGuardian = true
    accessProfile.isPayer = true
  })

  test('own all profiles', () => {
    expect(
      abilityBuilder.hasAnyProfile(['member', 'guardian', 'payor']),
    ).toBeTruthy()
  })

  test('own at least one profile', () => {
    expect(abilityBuilder.hasAnyProfile(['member', 'caMember'])).toBeTruthy()
  })

  test('own none of the profiles', () => {
    expect(
      abilityBuilder.hasAnyProfile(['caMember', 'isFinancialManager']),
    ).toBeFalsy()
  })
})

describe('hasAllProfiles', () => {
  beforeEach(() => {
    accessProfile.isMember = true
    accessProfile.isGuardian = true
    accessProfile.isPayer = true
  })

  test('own all profiles', () => {
    expect(
      abilityBuilder.hasAllProfiles(['member', 'guardian', 'payor']),
    ).toBeTruthy()
  })

  test('own only one of the profiles', () => {
    expect(abilityBuilder.hasAllProfiles(['member', 'caMember'])).toBeFalsy()
  })

  test('own none of the profiles', () => {
    expect(
      abilityBuilder.hasAllProfiles(['caMember', 'isFinancialManager']),
    ).toBeFalsy()
  })
})

describe('hasRole', () => {
  beforeEach(() => {
    accessProfile.hasRole = vi.fn((role: string) => role === 'foo')
  })

  test('has role', () => {
    expect(abilityBuilder.hasRole('foo')).toBeTruthy()
  })
  test('has not role', () => {
    expect(abilityBuilder.hasRole('bar')).toBeFalsy()
  })
})

describe('hasAnyRole', () => {
  beforeEach(() => {
    accessProfile.hasRole = vi.fn(
      (role: string) => role === 'role1' || role === 'role2',
    )
  })

  test('own all roles', () => {
    expect(abilityBuilder.hasAnyRole(['role1', 'role2'])).toBeTruthy()
  })

  test('own at least one role', () => {
    expect(abilityBuilder.hasAnyRole(['role1', 'role3'])).toBeTruthy()
  })

  test('own none of the roles', () => {
    expect(abilityBuilder.hasAnyRole(['role3'])).toBeFalsy()
  })
})

describe('hasAllRoles', () => {
  beforeEach(() => {
    accessProfile.hasRole = vi.fn(
      (role: string) => role === 'role1' || role === 'role2',
    )
  })

  test('own all roles', () => {
    expect(abilityBuilder.hasAllRoles(['role1', 'role2'])).toBeTruthy()
  })

  test('own at least one role', () => {
    expect(abilityBuilder.hasAllRoles(['role1', 'role3'])).toBeFalsy()
  })

  test('own none of the roles', () => {
    expect(abilityBuilder.hasAllRoles(['role3'])).toBeFalsy()
  })
})

describe('hasModule', () => {
  beforeEach(() => {
    // @ts-expect-error accessing non-existent property for testing purposes
    organizationProfile.hasModule = vi.fn((module: string) => module === 'foo')
  })

  test('has module', () => {
    expect(abilityBuilder.hasModule('foo')).toBeTruthy()
  })
  test('has not module', () => {
    expect(abilityBuilder.hasModule('bar')).toBeFalsy()
  })
})

describe('hasAnyModule', () => {
  beforeEach(() => {
    // @ts-expect-error accessing non-existent property for testing purposes
    organizationProfile.hasModule = vi.fn(
      (Module: string) => Module === 'Module1' || Module === 'Module2',
    )
  })

  test('own all modules', () => {
    expect(abilityBuilder.hasAnyModule(['Module1', 'Module2'])).toBeTruthy()
  })

  test('own at least one module', () => {
    expect(abilityBuilder.hasAnyModule(['Module1', 'Module3'])).toBeTruthy()
  })

  test('own none of the modules', () => {
    expect(abilityBuilder.hasAnyModule(['Module3'])).toBeFalsy()
  })
})

describe('hasAllModules', () => {
  beforeEach(() => {
    // @ts-expect-error accessing non-existent property for testing purposes
    organizationProfile.hasModule = vi.fn(
      (Module: string) => Module === 'Module1' || Module === 'Module2',
    )
  })

  test('own all modules', () => {
    expect(abilityBuilder.hasAllModules(['Module1', 'Module2'])).toBeTruthy()
  })

  test('own at least one module', () => {
    expect(abilityBuilder.hasAllModules(['Module1', 'Module3'])).toBeFalsy()
  })

  test('own none of the modules', () => {
    expect(abilityBuilder.hasAllModules(['Module3'])).toBeFalsy()
  })
})