describe("plugin: integrity-check", () => {
  
  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.LibResilientPluginConstructors = new Map()
    LR = {
        log: (component, ...items)=>{
            console.debug(component + ' :: ', ...items)
        }
    }
    
    global.resolvingFetch = jest.fn((url, init)=>{
                                return Promise.resolve(
                                    new Response(
                                        ['{"test": "success"}'],
                                        {
                                            type: "application/json",
                                            status: 200,
                                            statusText: "OK",
                                            headers: {
                                            'ETag': 'TestingETagHeader'
                                            },
                                            url: url
                                        }
                                    )
                                )
                            })
    
    init = {
        name: 'integrity-check',
        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/integrity-check.js");
    expect(LibResilientPluginConstructors.get('integrity-check')(LR, init).name).toEqual('integrity-check');
  });
  
  test("it should throw an error when there aren't any wrapped plugins configured", async () => {
    require("../../plugins/integrity-check.js");
    init = {
        name: 'integrity-check',
        uses: []
    }
    
    expect.assertions(2);
    try {
      await LibResilientPluginConstructors.get('integrity-check')(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/integrity-check.js");
    init = {
        name: 'integrity-check',
        uses: [{
            name: 'plugin-1'
        },{
            name: 'plugin-2'
        }]
    }
    
    expect.assertions(2);
    try {
      await LibResilientPluginConstructors.get('integrity-check')(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 an unsupported digest algorithm is used", async () => {
    require("../../plugins/integrity-check.js");
    
    expect.assertions(1);
    try {
        await LibResilientPluginConstructors.get('integrity-check')(LR, init).fetch('https://resilient.is/test.json', {
            integrity: "sha000-eiMrFuthzteJuj8fPwUMyNQMb2SMW7VITmmt2oAxGj0="
        })
    } catch (e) {
      expect(e.toString()).toMatch('No digest matched')
    }
  });
  
  test("it should return data from the wrapped plugin when no integrity data is available and requireIntegrity is false", async () => {
    require("../../plugins/integrity-check.js");
    
    const response = await LibResilientPluginConstructors.get('integrity-check')(LR, init).fetch('https://resilient.is/test.json');
    
    expect(resolvingFetch).toHaveBeenCalled();
    expect(await response.json()).toEqual({test: "success"})
    expect(response.url).toEqual('https://resilient.is/test.json')
  });
  
  test("it should reject no integrity data is available but requireIntegrity is true", async () => {
    require("../../plugins/integrity-check.js");
    init.requireIntegrity = true
    
    expect.assertions(2);
    try {
      await LibResilientPluginConstructors.get('integrity-check')(LR, init).fetch('https://resilient.is/test.json')
    } catch (e) {
      expect(e).toBeInstanceOf(Error)
      expect(e.toString()).toMatch('Integrity data required but not provided for')
    }
  });
  
  test("it should check integrity and return data from the wrapped plugin if SHA-256 integrity data matches", async () => {
    require("../../plugins/integrity-check.js");
    
    const response = await LibResilientPluginConstructors.get('integrity-check')(LR, init).fetch('https://resilient.is/test.json', requestInit);
    
    expect(resolvingFetch).toHaveBeenCalled();
    expect(await response.json()).toEqual({test: "success"})
    expect(response.url).toEqual('https://resilient.is/test.json')
  });

  test("it should check integrity and return data from the wrapped plugin if SHA-384 integrity data matches", async () => {
    require("../../plugins/integrity-check.js");
    
    const response = await LibResilientPluginConstructors.get('integrity-check')(LR, init).fetch('https://resilient.is/test.json', {
        integrity: "sha384-x4iqiH3PIPD51TibGEhTju/WhidcIEcnrpdklYEtIS87f96c4nLyj6CuwUp8kyOo"
    });
    
    expect(resolvingFetch).toHaveBeenCalled();
    expect(await response.json()).toEqual({test: "success"})
    expect(response.url).toEqual('https://resilient.is/test.json')
  });
  
  test("it should check integrity and return data from the wrapped plugin if SHA-512 integrity data matches", async () => {
    require("../../plugins/integrity-check.js");
    
    const response = await LibResilientPluginConstructors.get('integrity-check')(LR, init).fetch('https://resilient.is/test.json', {
        integrity: "sha512-o+J3lPk7DU8xOJaNfZI5T4Upmaoc9XOVxOWPCFAy4pTgvS8LrJZ8iNis/2ZaryU4bB33cNSXQBxUDvwDxknEBQ=="
    });
    
    expect(resolvingFetch).toHaveBeenCalled();
    expect(await response.json()).toEqual({test: "success"})
    expect(response.url).toEqual('https://resilient.is/test.json')
  });
  
  test("it should check integrity of the data returned from the wrapped plugin and reject if it doesn't match", async () => {
    require("../../plugins/integrity-check.js");
    
    expect.assertions(1);
    try {
        await LibResilientPluginConstructors.get('integrity-check')(LR, init).fetch('https://resilient.is/test.json', {
            integrity: "sha256-INCORRECTINCORRECTINCORRECTINCORRECTINCORREC"
        });
    } catch(e) {
      expect(e.toString()).toMatch('No digest matched')
    }
  });
  
  test("it should check integrity of the data returned from the wrapped plugin and resolve if at least one of multiple integrity hash matches", async () => {
    require("../../plugins/integrity-check.js");
    
    const response = await LibResilientPluginConstructors.get('integrity-check')(LR, init).fetch('https://resilient.is/test.json', {
        integrity: "sha256-INCORRECTINCORRECTINCORRECTINCORRECTINCORREC sha256-eiMrFuthzteJuj8fPwUMyNQMb2SMW7VITmmt2oAxGj0="
    });
    
    expect(resolvingFetch).toHaveBeenCalled();
    expect(await response.json()).toEqual({test: "success"})
    expect(response.url).toEqual('https://resilient.is/test.json')
  });
  
  test("it should check integrity of the data returned from the wrapped plugin and reject if all out of multiple integrity hash do not match", async () => {
    require("../../plugins/integrity-check.js");
    
    expect.assertions(1);
    try {
        await LibResilientPluginConstructors.get('integrity-check')(LR, init).fetch('https://resilient.is/test.json', {
            integrity: "sha256-INCORRECTINCORRECTINCORRECTINCORRECTINCORREC sha256-WRONGWRONGWRONGWRONGWRONGWRONGWRONGWRONGWRON"
        });
    } catch(e) {
      expect(e.toString()).toMatch('No digest matched')
    }
  });
  
});