checkpoint: add unit tests for checkpoint create command

add unit tests for checkpoint create command.

Signed-off-by: ChengyuZhu6 <hudson@cyzhu.com>

Author: ChengyuZhu6

cmd/nerdctl/checkpoint/checkpoint_create_linux_test.go

@@ -0,0 +1,119 @@
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package checkpoint
+
+import (
+	"errors"
+	"testing"
+
+	"github.com/containerd/nerdctl/mod/tigron/expect"
+	"github.com/containerd/nerdctl/mod/tigron/test"
+
+	"github.com/containerd/nerdctl/v2/pkg/testutil"
+	"github.com/containerd/nerdctl/v2/pkg/testutil/nerdtest"
+)
+
+func TestCheckpointCreateErrors(t *testing.T) {
+	testCase := nerdtest.Setup()
+	testCase.SubTests = []*test.Case{
+		{
+			Description: "too-few-arguments",
+			Command:     test.Command("checkpoint", "create", "too-few-arguments"),
+			Expected: func(data test.Data, helpers test.Helpers) *test.Expected {
+				return &test.Expected{
+					ExitCode: 1,
+				}
+			},
+		},
+		{
+			Description: "too-many-arguments",
+			Command:     test.Command("checkpoint", "create", "too", "many", "arguments"),
+			Expected: func(data test.Data, helpers test.Helpers) *test.Expected {
+				return &test.Expected{
+					ExitCode: 1,
+				}
+			},
+		},
+		{
+			Description: "invalid-container-id",
+			Command:     test.Command("checkpoint", "create", "foo", "bar"),
+			Expected: func(data test.Data, helpers test.Helpers) *test.Expected {
+				return &test.Expected{
+					ExitCode: 1,
+					Errors:   []error{errors.New("error creating checkpoint for container: foo")},
+				}
+			},
+		},
+	}
+
+	testCase.Run(t)
+}
+
+func TestCheckpointCreate(t *testing.T) {
+	const (
+		checkpointName = "checkpoint-bar"
+		checkpointDir  = "/dir/foo"
+	)
+	testCase := nerdtest.Setup()
+
+	testCase.SubTests = []*test.Case{
+		{
+			Description: "leave-running=true",
+			Setup: func(data test.Data, helpers test.Helpers) {
+				helpers.Ensure("run", "-d", "--name", data.Identifier("container-running"), testutil.CommonImage, "sleep", "infinity")
+			},
+			Cleanup: func(data test.Data, helpers test.Helpers) {
+				helpers.Custom("rm", "-rf", checkpointDir).Run(&test.Expected{
+					ExitCode: expect.ExitCodeSuccess,
+				})
+				helpers.Anyhow("rm", "-f", data.Identifier("container-running"))
+			},
+			Command: func(data test.Data, helpers test.Helpers) test.TestableCommand {
+				return helpers.Command("checkpoint", "create", "--leave-running", "--checkpoint-dir", checkpointDir, data.Identifier("container-running"), checkpointName)
+			},
+			Expected: func(data test.Data, helpers test.Helpers) *test.Expected {
+				return &test.Expected{
+					ExitCode: 0,
+					Output:   expect.Equals(checkpointName + "\n"),
+				}
+			},
+		},
+		{
+			Description: "leave-running=false",
+			Setup: func(data test.Data, helpers test.Helpers) {
+				helpers.Ensure("run", "-d", "--name", data.Identifier("container-exit"), testutil.CommonImage, "sleep", "infinity")
+			},
+			Cleanup: func(data test.Data, helpers test.Helpers) {
+				helpers.Custom("rm", "-rf", checkpointDir).Run(&test.Expected{
+					ExitCode: expect.ExitCodeSuccess,
+				})
+				helpers.Anyhow("rm", "-f", data.Identifier("container-exit"))
+			},
+			Command: func(data test.Data, helpers test.Helpers) test.TestableCommand {
+				return helpers.Command("checkpoint", "create", "--checkpoint-dir", checkpointDir, data.Identifier("container-exit"), checkpointName)
+			},
+			Expected: func(data test.Data, helpers test.Helpers) *test.Expected {
+				return &test.Expected{
+					ExitCode: 0,
+					Output:   expect.Equals(checkpointName + "\n"),
+				}
+			},
+		},
+	}
+
+	testCase.Run(t)
+}

cmd/nerdctl/checkpoint/checkpoint_test.go

@@ -0,0 +1,27 @@
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package checkpoint
+
+import (
+	"testing"
+
+	"github.com/containerd/nerdctl/v2/pkg/testutil"
+)
+
+func TestMain(m *testing.M) {
+	testutil.M(m)
+}