const temp = require('temp').track()
const TextBuffer = require('text-buffer')
const Project = require('../src/project')
const fs = require('fs-plus')
const path = require('path')
const {Directory} = require('pathwatcher')
const {stopAllWatchers} = require('../src/path-watcher')
const GitRepository = require('../src/git-repository')

describe('Project', () => {
  beforeEach(() => {
    const directory = atom.project.getDirectories()[0]
    const paths = directory ? [directory.resolve('dir')] : [null]
    atom.project.setPaths(paths)

    // Wait for project's service consumers to be asynchronously added
    waits(1)
  })

  describe('serialization', () => {
    let deserializedProject = null
    let notQuittingProject = null
    let quittingProject = null

    afterEach(() => {
      if (deserializedProject != null) {
        deserializedProject.destroy()
      }
      if (notQuittingProject != null) {
        notQuittingProject.destroy()
      }
      if (quittingProject != null) {
        quittingProject.destroy()
      }
    })

    it("does not deserialize paths to directories that don't exist", () => {
      deserializedProject = new Project({
        notificationManager: atom.notifications,
        packageManager: atom.packages,
        confirm: atom.confirm,
        grammarRegistry: atom.grammars
      })
      const state = atom.project.serialize()
      state.paths.push('/directory/that/does/not/exist')

      let err = null
      waitsForPromise(() =>
        deserializedProject.deserialize(state, atom.deserializers)
          .catch(e => { err = e })
      )

      runs(() => {
        expect(deserializedProject.getPaths()).toEqual(atom.project.getPaths())
        expect(err.missingProjectPaths).toEqual(['/directory/that/does/not/exist'])
      })
    })

    it('does not deserialize paths that are now files', () => {
      const childPath = path.join(temp.mkdirSync('atom-spec-project'), 'child')
      fs.mkdirSync(childPath)

      deserializedProject = new Project({
        notificationManager: atom.notifications,
        packageManager: atom.packages,
        confirm: atom.confirm,
        grammarRegistry: atom.grammars
      })
      atom.project.setPaths([childPath])
      const state = atom.project.serialize()

      fs.rmdirSync(childPath)
      fs.writeFileSync(childPath, 'surprise!\n')

      let err = null
      waitsForPromise(() =>
        deserializedProject.deserialize(state, atom.deserializers)
          .catch(e => { err = e })
      )

      runs(() => {
        expect(deserializedProject.getPaths()).toEqual([])
        expect(err.missingProjectPaths).toEqual([childPath])
      })
    })

    it('does not include unretained buffers in the serialized state', () => {
      waitsForPromise(() => atom.project.bufferForPath('a'))

      runs(() => {
        expect(atom.project.getBuffers().length).toBe(1)

        deserializedProject = new Project({
          notificationManager: atom.notifications,
          packageManager: atom.packages,
          confirm: atom.confirm,
          grammarRegistry: atom.grammars
        })
      })

      waitsForPromise(() => deserializedProject.deserialize(atom.project.serialize({isUnloading: false})))

      runs(() => expect(deserializedProject.getBuffers().length).toBe(0))
    })

    it('listens for destroyed events on deserialized buffers and removes them when they are destroyed', () => {
      waitsForPromise(() => atom.workspace.open('a'))

      runs(() => {
        expect(atom.project.getBuffers().length).toBe(1)
        deserializedProject = new Project({
          notificationManager: atom.notifications,
          packageManager: atom.packages,
          confirm: atom.confirm,
          grammarRegistry: atom.grammars
        })
      })

      waitsForPromise(() => deserializedProject.deserialize(atom.project.serialize({isUnloading: false})))

      runs(() => {
        expect(deserializedProject.getBuffers().length).toBe(1)
        deserializedProject.getBuffers()[0].destroy()
        expect(deserializedProject.getBuffers().length).toBe(0)
      })
    })

    it('does not deserialize buffers when their path is now a directory', () => {
      const pathToOpen = path.join(temp.mkdirSync('atom-spec-project'), 'file.txt')

      waitsForPromise(() => atom.workspace.open(pathToOpen))

      runs(() => {
        expect(atom.project.getBuffers().length).toBe(1)
        fs.mkdirSync(pathToOpen)
        deserializedProject = new Project({
          notificationManager: atom.notifications,
          packageManager: atom.packages,
          confirm: atom.confirm,
          grammarRegistry: atom.grammars
        })
      })

      waitsForPromise(() => deserializedProject.deserialize(atom.project.serialize({isUnloading: false})))

      runs(() => expect(deserializedProject.getBuffers().length).toBe(0))
    })

    it('does not deserialize buffers when their path is inaccessible', () => {
      if (process.platform === 'win32') { return } // chmod not supported on win32
      const pathToOpen = path.join(temp.mkdirSync('atom-spec-project'), 'file.txt')
      fs.writeFileSync(pathToOpen, '')

      waitsForPromise(() => atom.workspace.open(pathToOpen))

      runs(() => {
        expect(atom.project.getBuffers().length).toBe(1)
        fs.chmodSync(pathToOpen, '000')
        deserializedProject = new Project({
          notificationManager: atom.notifications,
          packageManager: atom.packages,
          confirm: atom.confirm,
          grammarRegistry: atom.grammars
        })
      })

      waitsForPromise(() => deserializedProject.deserialize(atom.project.serialize({isUnloading: false})))

      runs(() => expect(deserializedProject.getBuffers().length).toBe(0))
    })

    it('does not deserialize buffers with their path is no longer present', () => {
      const pathToOpen = path.join(temp.mkdirSync('atom-spec-project'), 'file.txt')
      fs.writeFileSync(pathToOpen, '')

      waitsForPromise(() => atom.workspace.open(pathToOpen))

      runs(() => {
        expect(atom.project.getBuffers().length).toBe(1)
        fs.unlinkSync(pathToOpen)
        deserializedProject = new Project({
          notificationManager: atom.notifications,
          packageManager: atom.packages,
          confirm: atom.confirm,
          grammarRegistry: atom.grammars
        })
      })

      waitsForPromise(() => deserializedProject.deserialize(atom.project.serialize({isUnloading: false})))

      runs(() => expect(deserializedProject.getBuffers().length).toBe(0))
    })

    it('deserializes buffers that have never been saved before', () => {
      const pathToOpen = path.join(temp.mkdirSync('atom-spec-project'), 'file.txt')

      waitsForPromise(() => atom.workspace.open(pathToOpen))

      runs(() => {
        atom.workspace.getActiveTextEditor().setText('unsaved\n')
        expect(atom.project.getBuffers().length).toBe(1)

        deserializedProject = new Project({
          notificationManager: atom.notifications,
          packageManager: atom.packages,
          confirm: atom.confirm,
          grammarRegistry: atom.grammars
        })
      })

      waitsForPromise(() => deserializedProject.deserialize(atom.project.serialize({isUnloading: false})))

      runs(() => {
        expect(deserializedProject.getBuffers().length).toBe(1)
        expect(deserializedProject.getBuffers()[0].getPath()).toBe(pathToOpen)
        expect(deserializedProject.getBuffers()[0].getText()).toBe('unsaved\n')
      })
    })

    it('serializes marker layers and history only if Atom is quitting', () => {
      waitsForPromise(() => atom.workspace.open('a'))

      let bufferA = null
      let layerA = null
      let markerA = null

      runs(() => {
        bufferA = atom.project.getBuffers()[0]
        layerA = bufferA.addMarkerLayer({persistent: true})
        markerA = layerA.markPosition([0, 3])
        bufferA.append('!')
        notQuittingProject = new Project({
          notificationManager: atom.notifications,
          packageManager: atom.packages,
          confirm: atom.confirm,
          grammarRegistry: atom.grammars
        })
      })

      waitsForPromise(() => notQuittingProject.deserialize(atom.project.serialize({isUnloading: false})))

      runs(() => {
        expect(notQuittingProject.getBuffers()[0].getMarkerLayer(layerA.id), x => x.getMarker(markerA.id)).toBeUndefined()
        expect(notQuittingProject.getBuffers()[0].undo()).toBe(false)
        quittingProject = new Project({
          notificationManager: atom.notifications,
          packageManager: atom.packages,
          confirm: atom.confirm,
          grammarRegistry: atom.grammars
        })
      })

      waitsForPromise(() => quittingProject.deserialize(atom.project.serialize({isUnloading: true})))

      runs(() => {
        expect(quittingProject.getBuffers()[0].getMarkerLayer(layerA.id), x => x.getMarker(markerA.id)).not.toBeUndefined()
        expect(quittingProject.getBuffers()[0].undo()).toBe(true)
      })
    })
  })

  describe('when an editor is saved and the project has no path', () => {
    it("sets the project's path to the saved file's parent directory", () => {
      const tempFile = temp.openSync().path
      atom.project.setPaths([])
      expect(atom.project.getPaths()[0]).toBeUndefined()
      let editor = null

      waitsForPromise(() => atom.workspace.open().then(o => { editor = o }))

      waitsForPromise(() => editor.saveAs(tempFile))

      runs(() => expect(atom.project.getPaths()[0]).toBe(path.dirname(tempFile)))
    })
  })

  describe('before and after saving a buffer', () => {
    let buffer
    beforeEach(() =>
      waitsForPromise(() =>
        atom.project.bufferForPath(path.join(__dirname, 'fixtures', 'sample.js')).then((o) => {
          buffer = o
          buffer.retain()
        })
      )
    )

    afterEach(() => buffer.release())

    it('emits save events on the main process', () => {
      spyOn(atom.project.applicationDelegate, 'emitDidSavePath')
      spyOn(atom.project.applicationDelegate, 'emitWillSavePath')

      waitsForPromise(() => buffer.save())

      runs(() => {
        expect(atom.project.applicationDelegate.emitDidSavePath.calls.length).toBe(1)
        expect(atom.project.applicationDelegate.emitDidSavePath).toHaveBeenCalledWith(buffer.getPath())
        expect(atom.project.applicationDelegate.emitWillSavePath.calls.length).toBe(1)
        expect(atom.project.applicationDelegate.emitWillSavePath).toHaveBeenCalledWith(buffer.getPath())
      })
    })
  })

  describe('when a watch error is thrown from the TextBuffer', () => {
    let editor = null
    beforeEach(() =>
      waitsForPromise(() => atom.workspace.open(require.resolve('./fixtures/dir/a')).then(o => { editor = o }))
    )

    it('creates a warning notification', () => {
      let noteSpy
      atom.notifications.onDidAddNotification(noteSpy = jasmine.createSpy())

      const error = new Error('SomeError')
      error.eventType = 'resurrect'
      editor.buffer.emitter.emit('will-throw-watch-error', {
        handle: jasmine.createSpy(),
        error
      }
      )

      expect(noteSpy).toHaveBeenCalled()

      const notification = noteSpy.mostRecentCall.args[0]
      expect(notification.getType()).toBe('warning')
      expect(notification.getDetail()).toBe('SomeError')
      expect(notification.getMessage()).toContain('`resurrect`')
      expect(notification.getMessage()).toContain(path.join('fixtures', 'dir', 'a'))
    })
  })

  describe('when a custom repository-provider service is provided', () => {
    let fakeRepositoryProvider, fakeRepository

    beforeEach(() => {
      fakeRepository = {destroy () { return null }}
      fakeRepositoryProvider = {
        repositoryForDirectory (directory) { return Promise.resolve(fakeRepository) },
        repositoryForDirectorySync (directory) { return fakeRepository }
      }
    })

    it('uses it to create repositories for any directories that need one', () => {
      const projectPath = temp.mkdirSync('atom-project')
      atom.project.setPaths([projectPath])
      expect(atom.project.getRepositories()).toEqual([null])

      atom.packages.serviceHub.provide('atom.repository-provider', '0.1.0', fakeRepositoryProvider)
      waitsFor(() => atom.project.repositoryProviders.length > 1)
      runs(() => atom.project.getRepositories()[0] === fakeRepository)
    })

    it('does not create any new repositories if every directory has a repository', () => {
      const repositories = atom.project.getRepositories()
      expect(repositories.length).toEqual(1)
      expect(repositories[0]).toBeTruthy()

      atom.packages.serviceHub.provide('atom.repository-provider', '0.1.0', fakeRepositoryProvider)
      waitsFor(() => atom.project.repositoryProviders.length > 1)
      runs(() => expect(atom.project.getRepositories()).toBe(repositories))
    })

    it('stops using it to create repositories when the service is removed', () => {
      atom.project.setPaths([])

      const disposable = atom.packages.serviceHub.provide('atom.repository-provider', '0.1.0', fakeRepositoryProvider)
      waitsFor(() => atom.project.repositoryProviders.length > 1)
      runs(() => {
        disposable.dispose()
        atom.project.addPath(temp.mkdirSync('atom-project'))
        expect(atom.project.getRepositories()).toEqual([null])
      })
    })
  })

  describe('when a custom directory-provider service is provided', () => {
    class DummyDirectory {
      constructor (aPath) {
        this.path = aPath
      }
      getPath () { return this.path }
      getFile () { return {existsSync () { return false }} }
      getSubdirectory () { return {existsSync () { return false }} }
      isRoot () { return true }
      existsSync () { return this.path.endsWith('does-exist') }
      contains (filePath) { return filePath.startsWith(this.path) }
      onDidChangeFiles (callback) {
        onDidChangeFilesCallback = callback
        return {dispose: () => {}}
      }
    }

    let serviceDisposable = null
    let onDidChangeFilesCallback = null

    beforeEach(() => {
      serviceDisposable = atom.packages.serviceHub.provide('atom.directory-provider', '0.1.0', {
        directoryForURISync (uri) {
          if (uri.startsWith('ssh://')) {
            return new DummyDirectory(uri)
          } else {
            return null
          }
        }
      })
      onDidChangeFilesCallback = null

      waitsFor(() => atom.project.directoryProviders.length > 0)
    })

    it("uses the provider's custom directories for any paths that it handles", () => {
      const localPath = temp.mkdirSync('local-path')
      const remotePath = 'ssh://foreign-directory:8080/does-exist'

      atom.project.setPaths([localPath, remotePath])

      let directories = atom.project.getDirectories()
      expect(directories[0].getPath()).toBe(localPath)
      expect(directories[0] instanceof Directory).toBe(true)
      expect(directories[1].getPath()).toBe(remotePath)
      expect(directories[1] instanceof DummyDirectory).toBe(true)

      // It does not add new remote paths that do not exist
      const nonExistentRemotePath = 'ssh://another-directory:8080/does-not-exist'
      atom.project.addPath(nonExistentRemotePath)
      expect(atom.project.getDirectories().length).toBe(2)

      // It adds new remote paths if their directories exist.
      const newRemotePath = 'ssh://another-directory:8080/does-exist'
      atom.project.addPath(newRemotePath)
      directories = atom.project.getDirectories()
      expect(directories[2].getPath()).toBe(newRemotePath)
      expect(directories[2] instanceof DummyDirectory).toBe(true)
    })

    it('stops using the provider when the service is removed', () => {
      serviceDisposable.dispose()
      atom.project.setPaths(['ssh://foreign-directory:8080/does-exist'])
      expect(atom.project.getDirectories().length).toBe(0)
    })

    it('uses the custom onDidChangeFiles as the watcher if available', () => {
      // Ensure that all preexisting watchers are stopped
      waitsForPromise(() => stopAllWatchers())

      const remotePath = 'ssh://another-directory:8080/does-exist'
      runs(() => atom.project.setPaths([remotePath]))
      waitsForPromise(() => atom.project.getWatcherPromise(remotePath))

      runs(() => {
        expect(onDidChangeFilesCallback).not.toBeNull()

        const changeSpy = jasmine.createSpy('atom.project.onDidChangeFiles')
        const disposable = atom.project.onDidChangeFiles(changeSpy)

        const events = [{action: 'created', path: remotePath + '/test.txt'}]
        onDidChangeFilesCallback(events)

        expect(changeSpy).toHaveBeenCalledWith(events)
        disposable.dispose()
      })
    })
  })

  describe('.open(path)', () => {
    let absolutePath, newBufferHandler

    beforeEach(() => {
      absolutePath = require.resolve('./fixtures/dir/a')
      newBufferHandler = jasmine.createSpy('newBufferHandler')
      atom.project.onDidAddBuffer(newBufferHandler)
    })

    describe("when given an absolute path that isn't currently open", () => {
      it("returns a new edit session for the given path and emits 'buffer-created'", () => {
        let editor = null
        waitsForPromise(() => atom.workspace.open(absolutePath).then(o => { editor = o }))

        runs(() => {
          expect(editor.buffer.getPath()).toBe(absolutePath)
          expect(newBufferHandler).toHaveBeenCalledWith(editor.buffer)
        })
      })
    })

    describe("when given a relative path that isn't currently opened", () => {
      it("returns a new edit session for the given path (relative to the project root) and emits 'buffer-created'", () => {
        let editor = null
        waitsForPromise(() => atom.workspace.open(absolutePath).then(o => { editor = o }))

        runs(() => {
          expect(editor.buffer.getPath()).toBe(absolutePath)
          expect(newBufferHandler).toHaveBeenCalledWith(editor.buffer)
        })
      })
    })

    describe('when passed the path to a buffer that is currently opened', () => {
      it('returns a new edit session containing currently opened buffer', () => {
        let editor = null

        waitsForPromise(() => atom.workspace.open(absolutePath).then(o => { editor = o }))

        runs(() => newBufferHandler.reset())

        waitsForPromise(() =>
          atom.workspace.open(absolutePath).then(({buffer}) => expect(buffer).toBe(editor.buffer))
        )

        waitsForPromise(() =>
          atom.workspace.open('a').then(({buffer}) => {
            expect(buffer).toBe(editor.buffer)
            expect(newBufferHandler).not.toHaveBeenCalled()
          })
        )
      })
    })

    describe('when not passed a path', () => {
      it("returns a new edit session and emits 'buffer-created'", () => {
        let editor = null
        waitsForPromise(() => atom.workspace.open().then(o => { editor = o }))

        runs(() => {
          expect(editor.buffer.getPath()).toBeUndefined()
          expect(newBufferHandler).toHaveBeenCalledWith(editor.buffer)
        })
      })
    })
  })

  describe('.bufferForPath(path)', () => {
    let buffer = null

    beforeEach(() =>
      waitsForPromise(() =>
        atom.project.bufferForPath('a').then((o) => {
          buffer = o
          buffer.retain()
        })
      )
    )

    afterEach(() => buffer.release())

    describe('when opening a previously opened path', () => {
      it('does not create a new buffer', () => {
        waitsForPromise(() =>
          atom.project.bufferForPath('a').then(anotherBuffer => expect(anotherBuffer).toBe(buffer))
        )

        waitsForPromise(() =>
          atom.project.bufferForPath('b').then(anotherBuffer => expect(anotherBuffer).not.toBe(buffer))
        )

        waitsForPromise(() =>
          Promise.all([
            atom.project.bufferForPath('c'),
            atom.project.bufferForPath('c')
          ]).then(([buffer1, buffer2]) => {
            expect(buffer1).toBe(buffer2)
          })
        )
      })

      it('retries loading the buffer if it previously failed', () => {
        waitsForPromise({shouldReject: true}, () => {
          spyOn(TextBuffer, 'load').andCallFake(() => Promise.reject(new Error('Could not open file')))
          return atom.project.bufferForPath('b')
        })

        waitsForPromise({shouldReject: false}, () => {
          TextBuffer.load.andCallThrough()
          return atom.project.bufferForPath('b')
        })
      })

      it('creates a new buffer if the previous buffer was destroyed', () => {
        buffer.release()

        waitsForPromise(() =>
          atom.project.bufferForPath('b').then(anotherBuffer => expect(anotherBuffer).not.toBe(buffer))
        )
      })
    })
  })

  describe('.repositoryForDirectory(directory)', () => {
    it('resolves to null when the directory does not have a repository', () => {
      waitsForPromise(() => {
        const directory = new Directory('/tmp')
        return atom.project.repositoryForDirectory(directory).then((result) => {
          expect(result).toBeNull()
          expect(atom.project.repositoryProviders.length).toBeGreaterThan(0)
          expect(atom.project.repositoryPromisesByPath.size).toBe(0)
        })
      })
    })

    it('resolves to a GitRepository and is cached when the given directory is a Git repo', () => {
      waitsForPromise(() => {
        const directory = new Directory(path.join(__dirname, '..'))
        const promise = atom.project.repositoryForDirectory(directory)
        return promise.then((result) => {
          expect(result).toBeInstanceOf(GitRepository)
          const dirPath = directory.getRealPathSync()
          expect(result.getPath()).toBe(path.join(dirPath, '.git'))

          // Verify that the result is cached.
          expect(atom.project.repositoryForDirectory(directory)).toBe(promise)
        })
      })
    })

    it('creates a new repository if a previous one with the same directory had been destroyed', () => {
      let repository = null
      const directory = new Directory(path.join(__dirname, '..'))

      waitsForPromise(() => atom.project.repositoryForDirectory(directory).then(repo => { repository = repo }))

      runs(() => {
        expect(repository.isDestroyed()).toBe(false)
        repository.destroy()
        expect(repository.isDestroyed()).toBe(true)
      })

      waitsForPromise(() => atom.project.repositoryForDirectory(directory).then(repo => { repository = repo }))

      runs(() => expect(repository.isDestroyed()).toBe(false))
    })
  })

  describe('.setPaths(paths, options)', () => {
    describe('when path is a file', () => {
      it("sets its path to the file's parent directory and updates the root directory", () => {
        const filePath = require.resolve('./fixtures/dir/a')
        atom.project.setPaths([filePath])
        expect(atom.project.getPaths()[0]).toEqual(path.dirname(filePath))
        expect(atom.project.getDirectories()[0].path).toEqual(path.dirname(filePath))
      })
    })

    describe('when path is a directory', () => {
      it('assigns the directories and repositories', () => {
        const directory1 = temp.mkdirSync('non-git-repo')
        const directory2 = temp.mkdirSync('git-repo1')
        const directory3 = temp.mkdirSync('git-repo2')

        const gitDirPath = fs.absolute(path.join(__dirname, 'fixtures', 'git', 'master.git'))
        fs.copySync(gitDirPath, path.join(directory2, '.git'))
        fs.copySync(gitDirPath, path.join(directory3, '.git'))

        atom.project.setPaths([directory1, directory2, directory3])

        const [repo1, repo2, repo3] = atom.project.getRepositories()
        expect(repo1).toBeNull()
        expect(repo2.getShortHead()).toBe('master')
        expect(repo2.getPath()).toBe(fs.realpathSync(path.join(directory2, '.git')))
        expect(repo3.getShortHead()).toBe('master')
        expect(repo3.getPath()).toBe(fs.realpathSync(path.join(directory3, '.git')))
      })

      it('calls callbacks registered with ::onDidChangePaths', () => {
        const onDidChangePathsSpy = jasmine.createSpy('onDidChangePaths spy')
        atom.project.onDidChangePaths(onDidChangePathsSpy)

        const paths = [ temp.mkdirSync('dir1'), temp.mkdirSync('dir2') ]
        atom.project.setPaths(paths)

        expect(onDidChangePathsSpy.callCount).toBe(1)
        expect(onDidChangePathsSpy.mostRecentCall.args[0]).toEqual(paths)
      })

      it('optionally throws an error with any paths that did not exist', () => {
        const paths = [temp.mkdirSync('exists0'), '/doesnt-exists/0', temp.mkdirSync('exists1'), '/doesnt-exists/1']

        try {
          atom.project.setPaths(paths, {mustExist: true})
          expect('no exception thrown').toBeUndefined()
        } catch (e) {
          expect(e.missingProjectPaths).toEqual([paths[1], paths[3]])
        }

        expect(atom.project.getPaths()).toEqual([paths[0], paths[2]])
      })
    })

    describe('when no paths are given', () => {
      it('clears its path', () => {
        atom.project.setPaths([])
        expect(atom.project.getPaths()).toEqual([])
        expect(atom.project.getDirectories()).toEqual([])
      })
    })

    it('normalizes the path to remove consecutive slashes, ., and .. segments', () => {
      atom.project.setPaths([`${require.resolve('./fixtures/dir/a')}${path.sep}b${path.sep}${path.sep}..`])
      expect(atom.project.getPaths()[0]).toEqual(path.dirname(require.resolve('./fixtures/dir/a')))
      expect(atom.project.getDirectories()[0].path).toEqual(path.dirname(require.resolve('./fixtures/dir/a')))
    })
  })

  describe('.addPath(path, options)', () => {
    it('calls callbacks registered with ::onDidChangePaths', () => {
      const onDidChangePathsSpy = jasmine.createSpy('onDidChangePaths spy')
      atom.project.onDidChangePaths(onDidChangePathsSpy)

      const [oldPath] = atom.project.getPaths()

      const newPath = temp.mkdirSync('dir')
      atom.project.addPath(newPath)

      expect(onDidChangePathsSpy.callCount).toBe(1)
      expect(onDidChangePathsSpy.mostRecentCall.args[0]).toEqual([oldPath, newPath])
    })

    it("doesn't add redundant paths", () => {
      const onDidChangePathsSpy = jasmine.createSpy('onDidChangePaths spy')
      atom.project.onDidChangePaths(onDidChangePathsSpy)
      const [oldPath] = atom.project.getPaths()

      // Doesn't re-add an existing root directory
      atom.project.addPath(oldPath)
      expect(atom.project.getPaths()).toEqual([oldPath])
      expect(onDidChangePathsSpy).not.toHaveBeenCalled()

      // Doesn't add an entry for a file-path within an existing root directory
      atom.project.addPath(path.join(oldPath, 'some-file.txt'))
      expect(atom.project.getPaths()).toEqual([oldPath])
      expect(onDidChangePathsSpy).not.toHaveBeenCalled()

      // Does add an entry for a directory within an existing directory
      const newPath = path.join(oldPath, 'a-dir')
      atom.project.addPath(newPath)
      expect(atom.project.getPaths()).toEqual([oldPath, newPath])
      expect(onDidChangePathsSpy).toHaveBeenCalled()
    })

    it("doesn't add non-existent directories", () => {
      const previousPaths = atom.project.getPaths()
      atom.project.addPath('/this-definitely/does-not-exist')
      expect(atom.project.getPaths()).toEqual(previousPaths)
    })

    it('optionally throws on non-existent directories', () => {
      expect(() => atom.project.addPath('/this-definitely/does-not-exist', {mustExist: true})).toThrow()
    })
  })

  describe('.removePath(path)', () => {
    let onDidChangePathsSpy = null

    beforeEach(() => {
      onDidChangePathsSpy = jasmine.createSpy('onDidChangePaths listener')
      atom.project.onDidChangePaths(onDidChangePathsSpy)
    })

    it('removes the directory and repository for the path', () => {
      const result = atom.project.removePath(atom.project.getPaths()[0])
      expect(atom.project.getDirectories()).toEqual([])
      expect(atom.project.getRepositories()).toEqual([])
      expect(atom.project.getPaths()).toEqual([])
      expect(result).toBe(true)
      expect(onDidChangePathsSpy).toHaveBeenCalled()
    })

    it("does nothing if the path is not one of the project's root paths", () => {
      const originalPaths = atom.project.getPaths()
      const result = atom.project.removePath(originalPaths[0] + 'xyz')
      expect(result).toBe(false)
      expect(atom.project.getPaths()).toEqual(originalPaths)
      expect(onDidChangePathsSpy).not.toHaveBeenCalled()
    })

    it("doesn't destroy the repository if it is shared by another root directory", () => {
      atom.project.setPaths([__dirname, path.join(__dirname, '..', 'src')])
      atom.project.removePath(__dirname)
      expect(atom.project.getPaths()).toEqual([path.join(__dirname, '..', 'src')])
      expect(atom.project.getRepositories()[0].isSubmodule('src')).toBe(false)
    })

    it('removes a path that is represented as a URI', () => {
      atom.packages.serviceHub.provide('atom.directory-provider', '0.1.0', {
        directoryForURISync (uri) {
          return {
            getPath () { return uri },
            getSubdirectory () { return {} },
            isRoot () { return true },
            existsSync () { return true },
            off () {}
          }
        }
      })

      const ftpURI = 'ftp://example.com/some/folder'

      atom.project.setPaths([ftpURI])
      expect(atom.project.getPaths()).toEqual([ftpURI])

      atom.project.removePath(ftpURI)
      expect(atom.project.getPaths()).toEqual([])
    })
  })

  describe('.onDidChangeFiles()', () => {
    let sub = []
    const events = []
    let checkCallback = () => {}

    beforeEach(() => {
      sub = atom.project.onDidChangeFiles((incoming) => {
        events.push(...incoming)
        checkCallback()
      })
    })

    afterEach(() => sub.dispose())

    const waitForEvents = (paths) => {
      const remaining = new Set(paths.map((p) => fs.realpathSync(p)))
      return new Promise((resolve, reject) => {
        checkCallback = () => {
          for (let event of events) { remaining.delete(event.path) }
          if (remaining.size === 0) { resolve() }
        }

        const expire = () => {
          checkCallback = () => {}
          console.error('Paths not seen:', remaining)
          reject(new Error('Expired before all expected events were delivered.'))
        }

        checkCallback()
        setTimeout(expire, 2000)
      })
    }

    it('reports filesystem changes within project paths', () => {
      const dirOne = temp.mkdirSync('atom-spec-project-one')
      const fileOne = path.join(dirOne, 'file-one.txt')
      const fileTwo = path.join(dirOne, 'file-two.txt')
      const dirTwo = temp.mkdirSync('atom-spec-project-two')
      const fileThree = path.join(dirTwo, 'file-three.txt')

      // Ensure that all preexisting watchers are stopped
      waitsForPromise(() => stopAllWatchers())

      runs(() => atom.project.setPaths([dirOne]))
      waitsForPromise(() => atom.project.getWatcherPromise(dirOne))

      runs(() => {
        expect(atom.project.watcherPromisesByPath[dirTwo]).toEqual(undefined)

        fs.writeFileSync(fileThree, 'three\n')
        fs.writeFileSync(fileTwo, 'two\n')
        fs.writeFileSync(fileOne, 'one\n')
      })

      waitsForPromise(() => waitForEvents([fileOne, fileTwo]))

      runs(() => expect(events.some(event => event.path === fileThree)).toBeFalsy())
    })
  })

  describe('.onDidAddBuffer()', () => {
    it('invokes the callback with added text buffers', () => {
      const buffers = []
      const added = []

      waitsForPromise(() =>
        atom.project.buildBuffer(require.resolve('./fixtures/dir/a'))
          .then(o => buffers.push(o))
      )

      runs(() => {
        expect(buffers.length).toBe(1)
        atom.project.onDidAddBuffer(buffer => added.push(buffer))
      })

      waitsForPromise(() =>
        atom.project.buildBuffer(require.resolve('./fixtures/dir/b'))
          .then(o => buffers.push(o))
      )

      runs(() => {
        expect(buffers.length).toBe(2)
        expect(added).toEqual([buffers[1]])
      })
    })
  })

  describe('.observeBuffers()', () => {
    it('invokes the observer with current and future text buffers', () => {
      const buffers = []
      const observed = []

      waitsForPromise(() =>
        atom.project.buildBuffer(require.resolve('./fixtures/dir/a'))
          .then(o => buffers.push(o))
      )

      waitsForPromise(() =>
        atom.project.buildBuffer(require.resolve('./fixtures/dir/b'))
          .then(o => buffers.push(o))
      )

      runs(() => {
        expect(buffers.length).toBe(2)
        atom.project.observeBuffers(buffer => observed.push(buffer))
        expect(observed).toEqual(buffers)
      })

      waitsForPromise(() =>
        atom.project.buildBuffer(require.resolve('./fixtures/dir/b'))
          .then(o => buffers.push(o))
      )

      runs(() => {
        expect(observed.length).toBe(3)
        expect(buffers.length).toBe(3)
        expect(observed).toEqual(buffers)
      })
    })
  })

  describe('.relativize(path)', () => {
    it('returns the path, relative to whichever root directory it is inside of', () => {
      atom.project.addPath(temp.mkdirSync('another-path'))

      let rootPath = atom.project.getPaths()[0]
      let childPath = path.join(rootPath, 'some', 'child', 'directory')
      expect(atom.project.relativize(childPath)).toBe(path.join('some', 'child', 'directory'))

      rootPath = atom.project.getPaths()[1]
      childPath = path.join(rootPath, 'some', 'child', 'directory')
      expect(atom.project.relativize(childPath)).toBe(path.join('some', 'child', 'directory'))
    })

    it('returns the given path if it is not in any of the root directories', () => {
      const randomPath = path.join('some', 'random', 'path')
      expect(atom.project.relativize(randomPath)).toBe(randomPath)
    })
  })

  describe('.relativizePath(path)', () => {
    it('returns the root path that contains the given path, and the path relativized to that root path', () => {
      atom.project.addPath(temp.mkdirSync('another-path'))

      let rootPath = atom.project.getPaths()[0]
      let childPath = path.join(rootPath, 'some', 'child', 'directory')
      expect(atom.project.relativizePath(childPath)).toEqual([rootPath, path.join('some', 'child', 'directory')])

      rootPath = atom.project.getPaths()[1]
      childPath = path.join(rootPath, 'some', 'child', 'directory')
      expect(atom.project.relativizePath(childPath)).toEqual([rootPath, path.join('some', 'child', 'directory')])
    })

    describe("when the given path isn't inside of any of the project's path", () => {
      it('returns null for the root path, and the given path unchanged', () => {
        const randomPath = path.join('some', 'random', 'path')
        expect(atom.project.relativizePath(randomPath)).toEqual([null, randomPath])
      })
    })

    describe('when the given path is a URL', () => {
      it('returns null for the root path, and the given path unchanged', () => {
        const url = 'http://the-path'
        expect(atom.project.relativizePath(url)).toEqual([null, url])
      })
    })

    describe('when the given path is inside more than one root folder', () => {
      it('uses the root folder that is closest to the given path', () => {
        atom.project.addPath(path.join(atom.project.getPaths()[0], 'a-dir'))

        const inputPath = path.join(atom.project.getPaths()[1], 'somewhere/something.txt')

        expect(atom.project.getDirectories()[0].contains(inputPath)).toBe(true)
        expect(atom.project.getDirectories()[1].contains(inputPath)).toBe(true)
        expect(atom.project.relativizePath(inputPath)).toEqual([
          atom.project.getPaths()[1],
          path.join('somewhere', 'something.txt')
        ])
      })
    })
  })

  describe('.contains(path)', () => {
    it('returns whether or not the given path is in one of the root directories', () => {
      const rootPath = atom.project.getPaths()[0]
      const childPath = path.join(rootPath, 'some', 'child', 'directory')
      expect(atom.project.contains(childPath)).toBe(true)

      const randomPath = path.join('some', 'random', 'path')
      expect(atom.project.contains(randomPath)).toBe(false)
    })
  })

  describe('.resolvePath(uri)', () => {
    it('normalizes disk drive letter in passed path on #win32', () => {
      expect(atom.project.resolvePath('d:\\file.txt')).toEqual('D:\\file.txt')
    })
  })
})