epam/miew

import { expect } from 'chai'
import sinon from 'sinon'
import palettes from '../palettes'
import SequenceColorer from './SequenceColorer'

describe('SequenceColorer', () => {
  const opts = { gradient: 'rainbow' }
  const left = 0.0
  const center = 0.5
  const right = 1.0
  const lGradientColor = 0x0000ff
  const cGradientColor = 0x00ff00
  const rGradientColor = 0xff0000

  class FirstPalette {
    defaultNamedColor = 0xffffff

    getGradientColor(value, gradientName) {
      if (value === left && gradientName === opts.gradient) {
        return lGradientColor
      }
      if (value === center && gradientName === opts.gradient) {
        return cGradientColor
      }
      if (value === right && gradientName === opts.gradient) {
        return rGradientColor
      }
      return 0x000000
    }
  }
  const palette = new FirstPalette()

  describe('#getAtomColor', () => {
    let paletteStub
    let sColorer

    before(() => {
      paletteStub = sinon.stub(palettes, 'first').value(palette)
      sColorer = new SequenceColorer()
    })
    after(() => {
      paletteStub.restore()
    })

    it("returns default color if atom's residue's chain length is invert infinity", () => {
      const residue = {
        _chain: {
          minSequence: Number.POSITIVE_INFINITY,
          maxSequence: Number.NEGATIVE_INFINITY
        },
        _sequence: 5
      }
      const atom = { residue }
      expect(sColorer.getAtomColor(atom)).to.equal(palette.defaultNamedColor)
    })
  })

  describe('#getResidueColor', () => {
    let paletteStub
    let sColorer

    before(() => {
      paletteStub = sinon.stub(palettes, 'first').value(palette)
      sColorer = new SequenceColorer()
    })
    after(() => {
      paletteStub.restore()
    })

    it("returns default color if residue's chain length is invert infinity (means no counted residues in chain)", () => {
      const residue = {
        _chain: {
          minSequence: Number.POSITIVE_INFINITY,
          maxSequence: Number.NEGATIVE_INFINITY
        },
        _sequence: 5
      }
      expect(sColorer.getResidueColor(residue)).to.equal(
        palette.defaultNamedColor
      )
    })

    it("returns left gradient color if residue sequence ID is first in residue's chain", () => {
      const residue = {
        _chain: { minSequence: 1, maxSequence: 9 },
        _sequence: 1
      }
      expect(sColorer.getResidueColor(residue)).to.equal(lGradientColor)
    })

    it("returns middle gradient color if residue sequence ID is central in residue's chain", () => {
      const residue = {
        _chain: { minSequence: 1, maxSequence: 9 },
        _sequence: 5
      }
      expect(sColorer.getResidueColor(residue)).to.equal(cGradientColor)
    })

    it("returns right gradient color if residue sequence ID is last in residue's chain", () => {
      const residue = {
        _chain: { minSequence: 1, maxSequence: 9 },
        _sequence: 9
      }
      expect(sColorer.getResidueColor(residue)).to.equal(rGradientColor)
    })

    it("returns left gradient color if residue residue's chain length is 0 (means 1 counted residue exists in chain)", () => {
      const residue = {
        _chain: { minSequence: 1, maxSequence: 1 },
        _sequence: 1
      }
      expect(sColorer.getResidueColor(residue)).to.equal(lGradientColor)
    })
  })

  describe('.id', () => {
    const sColorer = new SequenceColorer()

    it("have .id property type 'string'", () => {
      expect(sColorer).to.have.property('id')
      expect(sColorer.id).to.be.a('string')
    })

    it('have .id property different from such in parent class', () => {
      const colorer = Object.getPrototypeOf(Object.getPrototypeOf(sColorer))
      expect(sColorer.id).to.not.equal(colorer.id)
    })
  })

  describe('.name', () => {
    it("have .name property type 'string'", () => {
      const sColorer = new SequenceColorer()
      expect(sColorer).to.have.property('name')
      expect(sColorer.name).to.be.a('string')
    })
  })

  describe('.shortName', () => {
    it("have .shortName property type 'string'", () => {
      const sColorer = new SequenceColorer()
      expect(sColorer).to.have.property('shortName')
      expect(sColorer.shortName).to.be.a('string')
    })
  })
})