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image_spec.rb
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image_spec.rb
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require 'spec_helper'
SingleCov.covered! uncovered: 16
describe Docker::Image do
describe '#to_s' do
subject { described_class.new(Docker.connection, info) }
let(:id) { 'bf119e2' }
let(:connection) { Docker.connection }
let(:info) do
{"id" => "bf119e2", "Repository" => "debian", "Tag" => "stable",
"Created" => 1364102658, "Size" => 24653, "VirtualSize" => 180116135}
end
let(:expected_string) do
"Docker::Image { :id => #{id}, :info => #{info.inspect}, "\
":connection => #{connection} }"
end
its(:to_s) { should == expected_string }
end
describe '#remove' do
context 'when no name is given' do
let(:id) { subject.id }
subject { described_class.create('fromImage' => 'busybox:latest') }
after { described_class.create('fromImage' => 'busybox:latest') }
it 'removes the Image' do
subject.remove(:force => true)
expect(Docker::Image.all.map(&:id)).to_not include(id)
end
end
context 'when using the class' do
let(:id) { subject.id }
subject { described_class.create('fromImage' => 'busybox:latest') }
after { described_class.create('fromImage' => 'busybox:latest') }
it 'removes the Image' do
Docker::Image.remove(id, force: true)
expect(Docker::Image.all.map(&:id)).to_not include(id)
end
end
context 'when a valid tag is given' do
it 'untags the Image'
end
context 'when an invalid tag is given' do
it 'raises an error'
end
end
describe '#insert_local' do
include_context "local paths"
subject { described_class.create('fromImage' => 'debian:stable') }
let(:rm) { false }
let(:new_image) {
opts = {'localPath' => file, 'outputPath' => '/'}
opts[:rm] = true if rm
subject.insert_local(opts)
}
context 'when the local file does not exist' do
let(:file) { '/lol/not/a/file' }
it 'raises an error' do
expect { new_image }.to raise_error(Docker::Error::ArgumentError)
end
end
context 'when the local file does exist' do
let(:file) { File.join(project_dir, 'Gemfile') }
let(:gemfile) { File.read('Gemfile') }
let(:container) { new_image.run('cat /Gemfile').tap(&:wait) }
after do
container.remove
new_image.remove
end
it 'creates a new Image that has that file' do
begin
output = container.streaming_logs(stdout: true)
expect(output).to eq(gemfile)
rescue Docker::Error::UnexpectedResponseError => ex
skip("Could not communicate with DockerHub: #{ex}")
end
end
end
context 'when a directory is passed' do
let(:new_image) {
subject.insert_local(
'localPath' => File.join(project_dir, 'lib'),
'outputPath' => '/lib'
)
}
let(:container) { new_image.run('ls -a /lib/docker') }
let(:response) { container.tap(&:wait).streaming_logs(stdout: true) }
after do
container.tap(&:wait).remove
new_image.remove
end
it 'inserts the directory' do
begin
expect(response.split("\n").sort).to eq(Dir.entries('lib/docker').sort)
rescue Docker::Error::UnexpectedResponseError => ex
skip("Could not communicate with DockerHub: #{ex}")
end
end
end
context 'when there are multiple files passed' do
let(:file) {
[File.join(project_dir, 'Gemfile'), File.join(project_dir, 'LICENSE')]
}
let(:gemfile) { File.read('Gemfile') }
let(:license) { File.read('LICENSE') }
let(:container) { new_image.run('cat /Gemfile /LICENSE') }
let(:response) {
container.tap(&:wait).streaming_logs(stdout: true)
}
after do
container.remove
new_image.remove
end
it 'creates a new Image that has each file' do
begin
expect(response).to eq("#{gemfile}#{license}")
rescue Docker::Error::UnexpectedResponseError => ex
skip("Could not communicate with DockerHub: #{ex}")
end
end
end
context 'when removing intermediate containers' do
let(:rm) { true }
let(:file) { File.join(project_dir, 'Gemfile') }
after(:each) { new_image.remove }
it 'leave no intermediate containers' do
begin
expect { new_image }.to change {
Docker::Container.all(:all => true).count
}.by 0
rescue Docker::Error::UnexpectedResponseError => ex
skip("Could not communicate with DockerHub: #{ex}")
end
end
it 'creates a new image' do
begin
expect{new_image}.to change{Docker::Image.all.count}.by 1
rescue Docker::Error::UnexpectedResponseError => ex
skip("Could not communicate with DockerHub: #{ex}")
end
end
end
end
describe '#push' do
let(:credentials) {
{
'username' => ENV['DOCKER_API_USER'],
'password' => ENV['DOCKER_API_PASS'],
'serveraddress' => 'https://index.docker.io/v1',
'email' => ENV['DOCKER_API_EMAIL']
}
}
let(:repo_tag) { "#{ENV['DOCKER_API_USER']}/true" }
let(:image) {
described_class.build("FROM tianon/true\n", "t" => repo_tag).refresh!
}
after { image.remove(:name => repo_tag, :noprune => true) }
it 'pushes the Image' do
skip_without_auth
image.push(credentials)
end
it 'streams output from push' do
skip_without_auth
expect { |b| image.push(credentials, &b) }
.to yield_control.at_least(1)
end
context 'when a tag is specified' do
it 'pushes that specific tag'
end
context 'when the image was retrived by get' do
let(:image) {
described_class.build("FROM tianon/true\n", "t" => repo_tag).refresh!
described_class.get(repo_tag)
}
context 'when no tag is specified' do
it 'looks up the first repo tag' do
skip_without_auth
expect { image.push }.to_not raise_error
end
end
end
context 'when there are no credentials' do
let(:credentials) { nil }
let(:repo_tag) { "localhost:5000/true" }
it 'still pushes' do
begin
image.push
rescue => ex
if ex.message =~ /connection refused/
skip("Registry at #{repo_tag} is not available")
else
expect { raise(ex) }.to_not raise_error
end
end
end
end
end
describe '#tag' do
subject { described_class.create('fromImage' => 'debian:stable') }
after { subject.remove(:name => 'teh:latest', :noprune => true) }
it 'tags the image with the repo name' do
subject.tag(:repo => :teh, :force => true)
expect(subject.info['RepoTags']).to include 'teh:latest'
end
end
describe '#json' do
before { skip_without_auth }
subject { described_class.create('fromImage' => 'debian:stable') }
let(:json) { subject.json }
it 'returns additional information about image image' do
expect(json).to be_a Hash
expect(json.length).to_not be_zero
end
end
describe '#history' do
subject { described_class.create('fromImage' => 'debian:stable') }
let(:history) { subject.history }
it 'returns the history of the Image' do
expect(history).to be_a Array
expect(history.length).to_not be_zero
expect(history).to be_all { |elem| elem.is_a? Hash }
end
end
describe '#run' do
let(:cmd) { nil }
let(:options) { {} }
subject do
described_class.create(
{'fromImage' => 'debian:stable'})
end
let(:container) { subject.run(cmd, options).tap(&:wait) }
let(:output) { container.streaming_logs(stdout: true) }
context 'when cmd is a String' do
let(:cmd) { 'ls /lib64/' }
after { container.remove }
it 'splits the String by spaces and creates a new Container' do
expect(output).to eq("ld-linux-x86-64.so.2\n")
end
end
context 'when cmd is an Array' do
let(:cmd) { %w[which pwd] }
after { container.remove }
it 'creates a new Container' do
expect(output).to eq("/bin/pwd\n")
end
end
context 'when cmd is nil', docker_1_12: true do
let(:cmd) { nil }
context 'no command configured in image' do
subject { described_class.create('fromImage' => 'swipely/base') }
it 'should raise an error if no command is specified' do
begin
container
rescue => ex
expect([Docker::Error::ServerError, Docker::Error::ClientError]).to include(ex.class)
expect(ex.message).to match(/No\ command\ specified/)
end
end
end
end
context "command configured in image" do
let(:cmd) { 'pwd' }
after { container.remove }
it 'should normally show result if image has Cmd configured' do
expect(output).to eql "/\n"
end
end
context 'when using cpu shares' do
let(:options) { { 'CpuShares' => 50 } }
after { container.remove }
it 'returns 50' do
skip('Not supported on podman') if ::Docker.podman?
expect(container.json["HostConfig"]["CpuShares"]).to eq 50
end
end
end
describe '#save' do
let(:image) { Docker::Image.get('busybox') }
it 'calls the class method' do
expect(Docker::Image).to receive(:save)
.with(image.id, 'busybox.tar', anything)
image.save('busybox.tar')
end
end
describe '#save_stream' do
let(:image) { Docker::Image.get('busybox') }
let(:block) { proc { |chunk| puts chunk } }
it 'calls the class method' do
expect(Docker::Image).to receive(:save_stream)
.with(image.id, instance_of(Hash), instance_of(Docker::Connection))
image.save_stream(:chunk_size => 1024 * 1024, &block)
end
end
describe '#refresh!' do
let(:image) { Docker::Image.create('fromImage' => 'debian:stable') }
it 'updates the @info hash' do
size = image.info.size
image.refresh!
expect(image.info.size).to be > size
end
context 'with an explicit connection' do
let(:connection) { Docker::Connection.new(Docker.url, Docker.options) }
let(:image) {
Docker::Image.create({'fromImage' => 'debian:stable'}, nil, connection)
}
it 'updates using the provided connection' do
image.refresh!
end
end
end
describe '.load' do
include_context "local paths"
let(:file) { File.join(project_dir, 'spec', 'fixtures', 'load.tar') }
context 'when the argument is a String' do
it 'loads tianon/true image from the file system' do
result = Docker::Image.load(file)
expect(result).to eq("")
end
end
context 'when the argument is an IO' do
let(:io) { File.open(file) }
after { io.close }
it 'loads tinan/true image from the IO' do
result = Docker::Image.load(io)
expect(result).to eq("")
end
end
end
describe '.create' do
subject { described_class }
context 'when the Image does not yet exist and the body is a Hash' do
let(:image) { subject.create('fromImage' => 'swipely/base') }
let(:creds) {
{
:username => ENV['DOCKER_API_USER'],
:password => ENV['DOCKER_API_PASS'],
:email => ENV['DOCKER_API_EMAIL']
}
}
before do
skip_without_auth
Docker::Image.create('fromImage' => 'swipely/base').remove
end
after { Docker::Image.create('fromImage' => 'swipely/base') }
it 'sets the id and sends Docker.creds' do
allow(Docker).to receive(:creds).and_return(creds)
expect(image).to be_a Docker::Image
expect(image.id).to match(/\A(sha256:)?[a-fA-F0-9]+\Z/)
expect(image.id).to_not include('base')
expect(image.id).to_not be_nil
expect(image.id).to_not be_empty
end
end
context 'image with tag' do
it 'pulls the image (string arguments)' do
image = subject.create('fromImage' => 'busybox', 'tag' => 'uclibc')
image.refresh!
expect(image.info['RepoTags']).to include(/busybox:uclibc$/)
end
it 'pulls the image (symbol arguments)' do
image = subject.create(fromImage: 'busybox', tag: 'uclibc')
image.refresh!
expect(image.info['RepoTags']).to include(/busybox:uclibc$/)
end
it 'supports identical fromImage and tag', docker_1_10: true do
# This is here for backwards compatibility. docker-api used to
# complete ignore the "tag" argument, which Docker itself prioritizes
# over a tag found in fromImage, which meant that we had 3 scenarios:
#
# 1 fromImage does not include a tag, and the tag argument is provided
# and isn't the default (i.e. "latest"): docker-api crashes looking
# for fromImage when the image that was pulled is fromImage:tag (or
# returns the wrong image if fromImage:latest exists)
# 2 fromImage does not a include a tag, and the tag argument is absent
# or default (i.e. "latest"): docker-api finds the right image.
# 3 fromImage includes a tag, and the tag argument is absent: docker-api
# also finds the right image.
# 4 fromImage includes a tag, and the tag argument is present: works if
# the tag is the same in both.
#
# Adding support for the tag argument to fix 1 above means we'd break 4
# if we didn't explicitly handle the case where both tags are identical.
# This is what this test checks.
#
# Note that providing the tag inline in fromImage is only supported in
# Docker 1.10 and up.
skip('Not supported on podman') if ::Docker.podman?
image = subject.create(fromImage: 'busybox:uclibc', tag: 'uclibc')
image.refresh!
expect(image.info['RepoTags']).to include('busybox:uclibc')
end
end
context 'with a block capturing create output' do
let(:create_output) { "" }
let(:block) { Proc.new { |chunk| create_output << chunk } }
before do
Docker.creds = nil
subject.create('fromImage' => 'busybox').remove(force: true)
end
it 'calls the block and passes build output' do
subject.create('fromImage' => 'busybox', &block)
expect(create_output).to match(/ulling.*busybox/)
end
end
end
describe '.get' do
subject { described_class }
let(:image) { subject.get(image_name) }
context 'when the image does exist' do
let(:image_name) { 'debian:stable' }
it 'returns the new image' do
expect(image).to be_a Docker::Image
end
end
context 'when the image does not exist' do
let(:image_name) { 'abcdefghijkl' }
before do
Docker.options = { :mock => true }
Excon.stub({ :method => :get }, { :status => 404 })
end
after do
Docker.options = {}
Excon.stubs.shift
end
it 'raises a not found error' do
expect { image }.to raise_error(Docker::Error::NotFoundError)
end
end
end
describe '.save' do
include_context "local paths"
context 'when a filename is specified' do
let(:file) { "#{project_dir}/scratch.tar" }
after { FileUtils.remove(file) }
it 'exports tarball of image to specified file' do
Docker::Image.save('swipely/base', file)
expect(File.exist?(file)).to eq true
expect(File.read(file)).to_not be_nil
end
end
context 'when no filename is specified' do
it 'returns raw binary data as string' do
raw = Docker::Image.save('swipely/base')
expect(raw).to_not be_nil
end
end
end
describe '.save_stream' do
let(:image) { 'busybox:latest' }
let(:non_streamed) do
Docker.connection.get('/images/get', 'names' => image)
end
let(:streamed) { '' }
let(:tar_files) do
proc do |string|
Gem::Package::TarReader
.new(StringIO.new(string, 'rb'))
.map(&:full_name)
.sort
end
end
it 'yields each chunk of the image' do
Docker::Image.save_stream(image) { |chunk| streamed << chunk }
expect(tar_files.call(streamed)).to eq(tar_files.call(non_streamed))
end
end
describe '.exist?' do
subject { described_class }
let(:exists) { subject.exist?(image_name) }
context 'when the image does exist' do
let(:image_name) { 'debian:stable' }
it 'returns true' do
expect(exists).to eq(true)
end
end
context 'when the image does not exist' do
let(:image_name) { 'abcdefghijkl' }
before do
Docker.options = { :mock => true }
Excon.stub({ :method => :get }, { :status => 404 })
end
after do
Docker.options = {}
Excon.stubs.shift
end
it 'return false' do
expect(exists).to eq(false)
end
end
end
describe '.import' do
include_context "local paths"
subject { described_class }
context 'when the file does not exist' do
let(:file) { '/lol/not/a/file' }
it 'raises an error' do
expect { subject.import(file) }
.to raise_error(Docker::Error::IOError)
end
end
context 'when the file does exist' do
let(:file) { File.join(project_dir, 'spec', 'fixtures', 'export.tar') }
let(:import) { subject.import(file) }
after { import.remove(:noprune => true) }
it 'creates the Image' do
expect(import).to be_a Docker::Image
expect(import.id).to_not be_nil
end
end
context 'when the argument is a URI' do
context 'when the URI is invalid' do
it 'raises an error' do
expect { subject.import('http://google.com') }
.to raise_error(Docker::Error::IOError)
end
end
context 'when the URI is valid' do
let(:uri) { 'http://swipely-pub.s3.amazonaws.com/tianon_true.tar' }
let(:import) { subject.import(uri) }
after { import.remove(:noprune => true) }
it 'returns an Image' do
expect(import).to be_a Docker::Image
expect(import.id).to_not be_nil
end
end
end
end
describe '.all' do
subject { described_class }
let(:images) { subject.all(:all => true) }
before { subject.create('fromImage' => 'debian:stable') }
it 'materializes each Image into a Docker::Image' do
images.each do |image|
expect(image).to_not be_nil
expect(image).to be_a(described_class)
expect(image.id).to_not be_nil
expected = [
'Created',
'Size'
]
expected << 'VirtualSize' unless ::Docker.podman?
expected.each do |key|
expect(image.info).to have_key(key)
end
end
expect(images.length).to_not be_zero
end
end
describe '.prune', :docker_17_03 => true do
it 'prune images' do
expect { Docker::Image.prune }.not_to raise_error
end
end
unless ::Docker.podman?
describe '.search' do
subject { described_class }
it 'materializes each Image into a Docker::Image' do
expect(subject.search('term' => 'sshd')).to be_all { |image|
!image.id.nil? && image.is_a?(described_class)
}
end
end
end
describe '.build' do
subject { described_class }
context 'with an invalid Dockerfile' do
if ::Docker.podman?
it 'throws a UnexpectedResponseError' do
expect { subject.build('lololol') }
.to raise_error(Docker::Error::UnexpectedResponseError)
end
else
it 'throws a UnexpectedResponseError', docker_17_09: false do
expect { subject.build('lololol') }
.to raise_error(Docker::Error::ClientError)
end
it 'throws a ClientError', docker_17_09: true do
expect { subject.build('lololol') }
.to raise_error(Docker::Error::ClientError)
end
end
end
context 'with a valid Dockerfile' do
context 'without query parameters' do
let(:image) { subject.build("FROM debian:stable\n") }
it 'builds an image' do
expect(image).to be_a Docker::Image
expect(image.id).to_not be_nil
expect(image.connection).to be_a Docker::Connection
end
end
context 'with specifying a repo in the query parameters' do
let(:image) {
subject.build(
"FROM debian:stable\nRUN true\n",
"t" => "#{ENV['DOCKER_API_USER']}/debian:true"
)
}
after { image.remove(:noprune => true) }
it 'builds an image and tags it' do
expect(image).to be_a Docker::Image
expect(image.id).to_not be_nil
expect(image.connection).to be_a Docker::Connection
image.refresh!
expect(image.info["RepoTags"].size).to eq(1)
expect(image.info["RepoTags"].first).to match(%r{#{ENV['DOCKER_API_USER']}/debian:true})
end
end
context 'with a block capturing build output' do
let(:build_output) { "" }
let(:block) { Proc.new { |chunk| build_output << chunk } }
let!(:image) { subject.build("FROM debian:stable\n", &block) }
it 'calls the block and passes build output' do
expect(build_output).to match(/(Step|STEP) \d(\/\d)?\s?: FROM debian:stable/)
end
end
end
end
describe '.build_from_dir' do
subject { described_class }
context 'with a valid Dockerfile' do
let(:dir) {
File.join(File.dirname(__FILE__), '..', 'fixtures', 'build_from_dir')
}
let(:docker_file) { File.new("#{dir}/Dockerfile") }
let(:image) { subject.build_from_dir(dir, opts, &block) }
let(:opts) { {} }
let(:block) { Proc.new {} }
let(:container) do
Docker::Container.create(
'Image' => image.id,
'Cmd' => %w[cat /Dockerfile]
).tap(&:start).tap(&:wait)
end
let(:output) { container.streaming_logs(stdout: true) }
after(:each) do
container.remove
image.remove(:noprune => true)
end
context 'with no query parameters' do
it 'builds the image' do
expect(output).to eq(docker_file.read)
end
end
context 'with specifying a repo in the query parameters' do
let(:opts) { { "t" => "#{ENV['DOCKER_API_USER']}/debian:from_dir" } }
it 'builds the image and tags it' do
expect(output).to eq(docker_file.read)
image.refresh!
expect(image.info["RepoTags"].size).to eq(1)
expect(image.info["RepoTags"].first).to match(%r{#{ENV['DOCKER_API_USER']}/debian:from_dir})
end
end
context 'with a block capturing build output' do
let(:build_output) { "" }
let(:block) { Proc.new { |chunk| build_output << chunk } }
it 'calls the block and passes build output' do
image # Create the image variable, which is lazy-loaded by Rspec
expect(build_output).to match(/(Step|STEP) \d(\/\d)?\s?: FROM debian:stable/)
end
context 'uses a cached version the second time' do
let(:build_output_two) { "" }
let(:block_two) { Proc.new { |chunk| build_output_two << chunk } }
let(:image_two) { subject.build_from_dir(dir, opts, &block_two) }
it 'calls the block and passes build output' do
skip('Not supported on podman') if ::Docker.podman?
image # Create the image variable, which is lazy-loaded by Rspec
expect(build_output).to match(/(Step|STEP) \d(\/\d)?\s?: FROM debian:stable/)
expect(build_output).to_not match(/Using cache/)
image_two # Create the image_two variable, which is lazy-loaded by Rspec
expect(build_output_two).to match(/Using cache/)
end
end
end
context 'with credentials passed' do
let(:creds) {
{
:username => ENV['DOCKER_API_USER'],
:password => ENV['DOCKER_API_PASS'],
:email => ENV['DOCKER_API_EMAIL'],
:serveraddress => 'https://index.docker.io/v1'
}
}
before { Docker.creds = creds }
after { Docker.creds = nil }
it 'sends X-Registry-Config header' do
expect(image.info[:headers].keys).to include('X-Registry-Config')
end
end
end
end
end