engine: resources: docker: Add a docker container resource

engine/resources/docker_container_test.go

@@ -0,0 +1,199 @@
+// Mgmt
+// Copyright (C) 2013-2018+ James Shubin and the project contributors
+// Written by James Shubin <james@shubin.ca> and the project contributors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package resources
+
+import (
+	"context"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"os"
+	"testing"
+	"time"
+
+	"github.com/docker/docker/api/types"
+	"github.com/docker/docker/api/types/container"
+	"github.com/docker/docker/api/types/filters"
+)
+
+var res *DockerContainerRes
+
+var id string
+
+func TestMain(m *testing.M) {
+	var setupCode, testCode, cleanupCode int
+
+	if err := setup(); err != nil {
+		log.Printf("error during setup: %s", err)
+		setupCode = 1
+	}
+
+	if setupCode == 0 {
+		testCode = m.Run()
+	}
+
+	if err := cleanup(); err != nil {
+		log.Printf("error during cleanup: %s", err)
+		cleanupCode = 1
+	}
+
+	os.Exit(setupCode + testCode + cleanupCode)
+}
+
+func Test_containerStart(t *testing.T) {
+	ctx, cancel := context.WithTimeout(context.Background(), 60*time.Second)
+	defer cancel()
+
+	if err := res.containerStart(ctx, id, types.ContainerStartOptions{}); err != nil {
+		t.Errorf("containerStart() error: %s", err)
+		return
+	}
+
+	l, err := res.client.ContainerList(
+		ctx,
+		types.ContainerListOptions{
+			Filters: filters.NewArgs(
+				filters.KeyValuePair{Key: "id", Value: id},
+				filters.KeyValuePair{Key: "status", Value: "running"},
+			),
+		},
+	)
+	if err != nil {
+		t.Errorf("error listing containers: %s", err)
+		return
+	}
+	if len(l) != 1 {
+		t.Errorf("failed to start container")
+		return
+	}
+}
+
+func Test_containerStop(t *testing.T) {
+	ctx, cancel := context.WithTimeout(context.Background(), 60*time.Second)
+	defer cancel()
+
+	if err := res.containerStop(ctx, id, nil); err != nil {
+		t.Errorf("containerStop() error: %s", err)
+		return
+	}
+
+	l, err := res.client.ContainerList(
+		ctx,
+		types.ContainerListOptions{
+			Filters: filters.NewArgs(
+				filters.KeyValuePair{Key: "id", Value: id},
+			),
+		},
+	)
+	if err != nil {
+		t.Errorf("error listing containers: %s", err)
+		return
+	}
+	if len(l) != 0 {
+		t.Errorf("failed to stop container")
+		return
+	}
+}
+
+func Test_containerRemove(t *testing.T) {
+	ctx, cancel := context.WithTimeout(context.Background(), 60*time.Second)
+	defer cancel()
+
+	if err := res.containerRemove(ctx, id, types.ContainerRemoveOptions{}); err != nil {
+		t.Errorf("containerRemove() error: %s", err)
+		return
+	}
+
+	l, err := res.client.ContainerList(
+		ctx,
+		types.ContainerListOptions{
+			All: true,
+			Filters: filters.NewArgs(
+				filters.KeyValuePair{Key: "id", Value: id},
+			),
+		},
+	)
+	if err != nil {
+		t.Errorf("error listing containers: %s", err)
+		return
+	}
+	if len(l) != 0 {
+		t.Errorf("failed to remove container")
+		return
+	}
+}
+
+func setup() error {
+	var err error
+
+	ctx, cancel := context.WithTimeout(context.Background(), 60*time.Second)
+	defer cancel()
+
+	res = &DockerContainerRes{}
+	res.Init(res.init)
+
+	p, err := res.client.ImagePull(ctx, "alpine", types.ImagePullOptions{})
+	if err != nil {
+		return fmt.Errorf("error pulling image: %s", err)
+	}
+	if _, err := ioutil.ReadAll(p); err != nil {
+		return fmt.Errorf("error reading image pull result: %s", err)
+	}
+
+	resp, err := res.client.ContainerCreate(
+		ctx,
+		&container.Config{
+			Image: "alpine",
+			Cmd:   []string{"sleep", "100"},
+		},
+		&container.HostConfig{},
+		nil,
+		"mgmt-test",
+	)
+	if err != nil {
+		return fmt.Errorf("error creating container: %s", err)
+	}
+	id = resp.ID
+	return nil
+}
+
+func cleanup() error {
+	ctx, cancel := context.WithTimeout(context.Background(), 60*time.Second)
+	defer cancel()
+
+	l, err := res.client.ContainerList(
+		ctx,
+		types.ContainerListOptions{
+			All:     true,
+			Filters: filters.NewArgs(filters.KeyValuePair{Key: "id", Value: id}),
+		},
+	)
+	if err != nil {
+		return fmt.Errorf("error listing containers: %s", err)
+	}
+
+	if len(l) > 0 {
+		if err := res.client.ContainerStop(ctx, id, nil); err != nil {
+			return fmt.Errorf("error stopping container: %s", err)
+		}
+		if err := res.client.ContainerRemove(ctx, id, types.ContainerRemoveOptions{}); err != nil {
+			return fmt.Errorf("error removing container: %s", err)
+		}
+	}
+	return nil
+}