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fakeclient.go
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fakeclient.go
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package lclient
import (
"bytes"
"context"
"errors"
"io"
"io/ioutil"
"time"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/network"
"github.com/docker/docker/api/types/registry"
)
// This mock client will return container and images lists
// By creating stubs, we're able to easily mock the Docke client for both success and error scenarios
// Taken from https://github.com/eclipse/codewind-installer/blob/master/pkg/docker/docker_test.go
type mockDockerClient struct {
}
var mockImageSummary = []types.ImageSummary{
types.ImageSummary{
ID: "golang",
RepoTags: []string{"golang:0.0.9"},
},
types.ImageSummary{
ID: "node",
RepoTags: []string{"node:0.0.9"},
},
}
var mockContainerList = []types.Container{
types.Container{
Names: []string{"/node"},
Image: "node",
Labels: map[string]string{
"component": "node",
},
},
types.Container{
Names: []string{"/go-test"},
Image: "golang",
Labels: map[string]string{
"component": "golang",
},
},
types.Container{
Names: []string{"/go-test-build"},
Image: "golang",
Labels: map[string]string{
"component": "golang",
},
},
}
var mockContainerCreatedBody = container.ContainerCreateCreatedBody{
ID: "golang",
}
// FakeNew returns a fake local client instance that can be used in unit tests
func FakeNew() *Client {
dockerClient := &mockDockerClient{}
localClient := Client{
Client: dockerClient,
}
return &localClient
}
func (m *mockDockerClient) ImagePull(ctx context.Context, image string, imagePullOptions types.ImagePullOptions) (io.ReadCloser, error) {
r := ioutil.NopCloser(bytes.NewReader([]byte("")))
return r, nil
}
func (m *mockDockerClient) ImageList(ctx context.Context, imageListOptions types.ImageListOptions) ([]types.ImageSummary, error) {
return mockImageSummary, nil
}
func (m *mockDockerClient) ContainerCreate(ctx context.Context, config *container.Config, hostConfig *container.HostConfig, networkingConfig *network.NetworkingConfig, containerName string) (container.ContainerCreateCreatedBody, error) {
return mockContainerCreatedBody, nil
}
func (m *mockDockerClient) ContainerStart(ctx context.Context, containerID string, options types.ContainerStartOptions) error {
return nil
}
func (m *mockDockerClient) ContainerList(ctx context.Context, containerListOptions types.ContainerListOptions) ([]types.Container, error) {
return mockContainerList, nil
}
func (m *mockDockerClient) ContainerStop(ctx context.Context, containerID string, timeout *time.Duration) error {
return nil
}
func (m *mockDockerClient) ContainerRemove(ctx context.Context, containerID string, options types.ContainerRemoveOptions) error {
return nil
}
func (m *mockDockerClient) ContainerInspect(ctx context.Context, containerID string) (types.ContainerJSON, error) {
return types.ContainerJSON{
ContainerJSONBase: &types.ContainerJSONBase{
HostConfig: &container.HostConfig{
AutoRemove: true,
},
},
}, nil
}
func (m *mockDockerClient) ContainerWait(ctx context.Context, containerID string, condition container.WaitCondition) (<-chan container.ContainerWaitOKBody, <-chan error) {
resultC := make(chan container.ContainerWaitOKBody)
return resultC, nil
}
func (m *mockDockerClient) DistributionInspect(ctx context.Context, image, encodedRegistryAuth string) (registry.DistributionInspect, error) {
return registry.DistributionInspect{}, nil
}
// This mock client will return errors for each call to a docker function
type mockDockerErrorClient struct {
}
// FakeErrorNew returns a fake local client instance that can be used in unit tests to verify errors
func FakeErrorNew() *Client {
dockerClient := &mockDockerErrorClient{}
localClient := Client{
Client: dockerClient,
}
return &localClient
}
var errImagePull = errors.New("error pulling image")
var errImageList = errors.New("error listing images")
var errContainerCreate = errors.New("error creating containers")
var errContainerList = errors.New("error listing containers")
var errContainerStart = errors.New("error starting containers")
var errContainerStop = errors.New("error stopping container")
var errContainerRemove = errors.New("error removing container")
var errContainerInspect = errors.New("error inspecting container")
var errContainerWait = errors.New("error timeout waiting for container")
var errDistributionInspect = errors.New("error inspecting distribution")
func (m *mockDockerErrorClient) ImageList(ctx context.Context, imageListOptions types.ImageListOptions) ([]types.ImageSummary, error) {
return nil, errImageList
}
func (m *mockDockerErrorClient) ImagePull(ctx context.Context, image string, imagePullOptions types.ImagePullOptions) (io.ReadCloser, error) {
r := ioutil.NopCloser(bytes.NewReader([]byte("")))
return r, errImagePull
}
func (m *mockDockerErrorClient) ContainerCreate(ctx context.Context, config *container.Config, hostConfig *container.HostConfig, networkingConfig *network.NetworkingConfig, containerName string) (container.ContainerCreateCreatedBody, error) {
return container.ContainerCreateCreatedBody{}, errContainerCreate
}
func (m *mockDockerErrorClient) ContainerStart(ctx context.Context, containerID string, options types.ContainerStartOptions) error {
return errContainerStart
}
func (m *mockDockerErrorClient) ContainerList(ctx context.Context, containerListOptions types.ContainerListOptions) ([]types.Container, error) {
return []types.Container{}, errContainerList
}
func (m *mockDockerErrorClient) ContainerStop(ctx context.Context, containerID string, timeout *time.Duration) error {
return errContainerStop
}
func (m *mockDockerErrorClient) ContainerRemove(ctx context.Context, containerID string, options types.ContainerRemoveOptions) error {
return errContainerRemove
}
func (m *mockDockerErrorClient) ContainerInspect(ctx context.Context, containerID string) (types.ContainerJSON, error) {
return types.ContainerJSON{}, errContainerInspect
}
func (m *mockDockerErrorClient) ContainerWait(ctx context.Context, containerID string, condition container.WaitCondition) (<-chan container.ContainerWaitOKBody, <-chan error) {
err := make(chan error)
err <- errContainerWait
return nil, err
}
func (m *mockDockerErrorClient) DistributionInspect(ctx context.Context, image, encodedRegistryAuth string) (registry.DistributionInspect, error) {
return registry.DistributionInspect{}, errDistributionInspect
}