mirror of https://github.com/knative/func.git
71 lines
1.4 KiB
Go
71 lines
1.4 KiB
Go
package docker_test
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import (
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"context"
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"testing"
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"time"
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"knative.dev/kn-plugin-func/docker"
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. "knative.dev/kn-plugin-func/testing"
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)
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// Test that we are starting podman service on behalf of user
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// if docker daemon is not present.
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func TestNewDockerClientWithAutomaticPodman(t *testing.T) {
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ctx, cancel := context.WithTimeout(context.Background(), time.Minute*1)
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defer cancel()
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defer WithExecutable(t, "podman", mockPodmanSrc)()
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defer WithEnvVar(t, "DOCKER_HOST", "")()
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dockerClient, _, err := docker.NewClient("unix:///var/run/nonexistent.sock")
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if err != nil {
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t.Error(err)
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}
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defer dockerClient.Close()
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_, err = dockerClient.Ping(ctx)
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if err != nil {
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t.Error(err)
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}
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}
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// Go source code of mock podman implementation.
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// It just emulates docker /_ping endpoint for all URIs.
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const mockPodmanSrc = `package main
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import (
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"fmt"
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"net"
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"net/http"
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"net/url"
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"os"
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)
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func main() {
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dockerHost := os.Args[3]
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u, err := url.Parse(dockerHost)
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if err != nil {
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fmt.Fprintln(os.Stderr, err)
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os.Exit(1)
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}
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sock := u.Path
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server := http.Server{}
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listener, err := net.Listen("unix", sock)
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if err != nil {
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fmt.Fprintln(os.Stderr, err)
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os.Exit(1)
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}
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// mimics /_ping endpoint
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server.Handler = http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
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writer.Header().Add("Content-Type", "text/plain")
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writer.WriteHeader(200)
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writer.Write([]byte("OK"))
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})
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server.Serve(listener)
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}
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`
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