import Anagram from './anagram'

describe('Anagram', () => {

  it("no matches", () => {
    const subject = new Anagram("diaper")
    const matches = subject.matches(...[ "hello", "world", "zombies", "pants"])

    expect(matches).toEqual([])
  })

  it("detects simple anagram", () => {
    const subject = new Anagram("ant")
    const matches = subject.matches(...['tan', 'stand', 'at'])

    expect(matches).toEqual(['tan'])
  })

  it("does not detect false positives", () => {
    const subject = new Anagram("galea")
    const matches = subject.matches(...["eagle"])

    expect(matches).toEqual([])
  })

  it("detects multiple anagrams", () => {
    const subject = new Anagram("master")
    const matches = subject.matches(...['stream', 'pigeon', 'maters'])

    expect(matches).toEqual(['stream', 'maters'])
  })

  it("does not detect anagram subsets", () => {
    const subject = new Anagram("good")
    const matches = subject.matches(...['dog', 'goody'])

    expect(matches).toEqual([])
  })

  it("detects anagram", () => {
    const subject = new Anagram("listen")
    const matches = subject.matches(...['enlists', 'google', 'inlets', 'banana'])

    expect(matches).toEqual(['inlets'])
  })

  it("detects multiple anagrams", () => {
    const subject = new Anagram("allergy")
    const matches = subject.matches(...['gallery', 'ballerina', 'regally', 'clergy', 'largely', 'leading'])

    expect(matches).toEqual(['gallery', 'regally', 'largely'])
  })

  it("detects anagrams case-insensitively", () => {
    const subject = new Anagram("Orchestra")
    const matches = subject.matches(...['cashregister', 'Carthorse', 'radishes'])

    expect(matches).toEqual(['Carthorse'])
  })

  it("does not detect a word as its own anagram", () => {
    const subject = new Anagram("banana")
    const matches = subject.matches(...['Banana'])

    expect(matches).toEqual([])
  })

  it("matches() accepts string arguments", () => {
    const subject = new Anagram("ant")
    const matches = subject.matches("stand", "tan", "at")

    expect(matches).toEqual(["tan"])
  })

  it("matches() accepts single string argument", () => {
    const subject = new Anagram("ant")
    const matches = subject.matches("tan")

    expect(matches).toEqual(["tan"])
  })

})