describe("plugin: signed-integrity", () => {
  
  beforeEach(() => {
    global.nodeFetch = require('node-fetch')
    global.Request = global.nodeFetch.Request
    global.Response = global.nodeFetch.Response
    global.crypto = require('crypto').webcrypto
    global.Blob = require('buffer').Blob;
    jest.resetModules();
    self = global
    global.btoa = (bin) => {
        return Buffer.from(bin, 'binary').toString('base64')
    }
    global.atob = (ascii) => {
        return Buffer.from(ascii, 'base64').toString('binary')
    }
    
    global.LibResilientPluginConstructors = new Map()
    LR = {
        log: (component, ...items)=>{
            console.debug(component + ' :: ', ...items)
        }
    }
    
    header = btoa('{"alg": "ES384"}').replace(/\//g, '_').replace(/\+/g, '-').replace(/=/g, '')
    payload = btoa('{"integrity": "sha256-eiMrFuthzteJuj8fPwUMyNQMb2SMW7VITmmt2oAxGj0="}').replace(/\//g, '_').replace(/\+/g, '-').replace(/=/g, '')
    signature = btoa('FIXME').replace(/\//g, '_').replace(/\+/g, '-').replace(/=/g, '')
    
    global.resolvingFetch = jest.fn((url, init)=>{
                                var content = '{"test": "success"}'
                                var status = 200
                                var statusText = "OK"
                                if (url == 'https://resilient.is/test.json.integrity') {
                                    content = header + '.' + payload + '.' + signature
                                } else if (url == 'https://resilient.is/fail.json.integrity') {
                                    content = '{"test": "fail"}'
                                    status = 404
                                    statusText = "Not Found"
                                }
                                return Promise.resolve(
                                    new Response(
                                        [content],
                                        {
                                            type: "application/json",
                                            status: status,
                                            statusText: statusText,
                                            headers: {
                                            'ETag': 'TestingETagHeader'
                                            },
                                            url: url
                                        }
                                    )
                                )
                            })
    
    init = {
        name: 'signed-integrity',
        uses: [
            {
                name: 'resolve-all',
                description: 'Resolves all',
                version: '0.0.1',
                fetch: resolvingFetch
            }
        ],
        requireIntegrity: false
    }
    requestInit = {
        integrity: "sha256-eiMrFuthzteJuj8fPwUMyNQMb2SMW7VITmmt2oAxGj0="
    }
    self.log = function(component, ...items) {
        console.debug(component + ' :: ', ...items)
    }
  })
  
  test("it should register in LibResilientPluginConstructors", () => {
    require("../../plugins/signed-integrity.js");
    expect(LibResilientPluginConstructors.get('signed-integrity')(LR, init).name).toEqual('signed-integrity');
  });
  
  test("it should throw an error when there aren't any wrapped plugins configured", async () => {
    require("../../plugins/signed-integrity.js");
    init = {
        name: 'signed-integrity',
        uses: []
    }
    
    expect.assertions(2);
    try {
      await LibResilientPluginConstructors.get('signed-integrity')(LR, init).fetch('https://resilient.is/test.json')
    } catch (e) {
      expect(e).toBeInstanceOf(Error)
      expect(e.toString()).toMatch('Expected exactly one plugin to wrap')
    }
  });
  
  test("it should throw an error when there are more than one wrapped plugins configured", async () => {
    require("../../plugins/signed-integrity.js");
    init = {
        name: 'signed-integrity',
        uses: [{
            name: 'plugin-1'
        },{
            name: 'plugin-2'
        }]
    }
    
    expect.assertions(2);
    try {
      await LibResilientPluginConstructors.get('signed-integrity')(LR, init).fetch('https://resilient.is/test.json')
    } catch (e) {
      expect(e).toBeInstanceOf(Error)
      expect(e.toString()).toMatch('Expected exactly one plugin to wrap')
    }
  });
  
  test("it should fetch content when integrity data provided without trying to fetch the integrity data URL", async () => {
    require("../../plugins/signed-integrity.js");
    
    const response = await LibResilientPluginConstructors.get('signed-integrity')(LR, init).fetch('https://resilient.is/test.json', {
        integrity: "sha384-x4iqiH3PIPD51TibGEhTju/WhidcIEcnrpdklYEtIS87f96c4nLyj6CuwUp8kyOo"
    });
    
    expect(resolvingFetch).toHaveBeenCalledTimes(1);
    expect(await response.json()).toEqual({test: "success"})
    expect(response.url).toEqual('https://resilient.is/test.json')
  });
  
  test("it should fetch content when integrity data not provided, by also fetching the integrity data URL", async () => {
    require("../../plugins/signed-integrity.js");
    
    const response = await LibResilientPluginConstructors.get('signed-integrity')(LR, init).fetch('https://resilient.is/test.json', {});
    
    expect(resolvingFetch).toHaveBeenCalledTimes(2);
    expect(resolvingFetch).toHaveBeenNthCalledWith(1, 'https://resilient.is/test.json.integrity')
    expect(await response.json()).toEqual({test: "success"})
    expect(response.url).toEqual('https://resilient.is/test.json')
  });
  
  test("it should fetch content when integrity data not provided, and integrity data URL 404s", async () => {
    require("../../plugins/signed-integrity.js");
    
    const response = await LibResilientPluginConstructors.get('signed-integrity')(LR, init).fetch('https://resilient.is/fail.json', {});
    
    expect(resolvingFetch).toHaveBeenCalledTimes(2);
    expect(resolvingFetch).toHaveBeenNthCalledWith(1, 'https://resilient.is/fail.json.integrity')
    expect(await response.json()).toEqual({test: "success"})
    expect(response.url).toEqual('https://resilient.is/fail.json')
  });
  
  test("it should refuse to fetch content when integrity data not provided and integrity data URL 404s, but requireIntegrity is set to true", async () => {
    require("../../plugins/signed-integrity.js");
    
    var newInit = init
    newInit.requireIntegrity = true
    
    expect.assertions(4);
    try {
      const response = await LibResilientPluginConstructors.get('signed-integrity')(LR, newInit).fetch('https://resilient.is/fail.json', {});
    } catch (e) {
      expect(resolvingFetch).toHaveBeenCalledTimes(1);
      expect(resolvingFetch).toHaveBeenCalledWith('https://resilient.is/fail.json.integrity')
      expect(e).toBeInstanceOf(Error)
      expect(e.toString()).toMatch('No integrity data available, though required.')
    }
  });
  
});