Rewrite container_stats tests

cmd/nerdctl/container/container_stats_test.go

@@ -0,0 +1,108 @@
+/*
+   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 container
+
+import (
+	"runtime"
+	"testing"
+
+	"github.com/containerd/nerdctl/v2/pkg/testutil"
+	"github.com/containerd/nerdctl/v2/pkg/testutil/nerdtest"
+	"github.com/containerd/nerdctl/v2/pkg/testutil/test"
+)
+
+func TestStats(t *testing.T) {
+	testCase := nerdtest.Setup()
+
+	// FIXME: does not seem to work on windows
+	testCase.Require = test.Not(test.Windows)
+
+	if runtime.GOOS == "linux" {
+		// this comment is for `nerdctl ps` but it also valid for `nerdctl stats` :
+		// https://github.com/containerd/nerdctl/pull/223#issuecomment-851395178
+		testCase.Require = test.Require(
+			testCase.Require,
+			nerdtest.CgroupsAccessible,
+		)
+	}
+
+	testCase.Cleanup = func(data test.Data, helpers test.Helpers) {
+		helpers.Anyhow("rm", "-f", data.Identifier("container"))
+		helpers.Anyhow("rm", "-f", data.Identifier("memlimited"))
+		helpers.Anyhow("rm", "-f", data.Identifier("exited"))
+	}
+
+	testCase.Setup = func(data test.Data, helpers test.Helpers) {
+		helpers.Ensure("run", "-d", "--name", data.Identifier("container"), testutil.CommonImage, "sleep", "10")
+		helpers.Ensure("run", "-d", "--name", data.Identifier("memlimited"), "--memory", "1g", testutil.CommonImage, "sleep", "10")
+		helpers.Ensure("run", "--name", data.Identifier("exited"), testutil.CommonImage, "echo", "'exited'")
+		data.Set("id", data.Identifier("container"))
+	}
+
+	testCase.SubTests = []*test.Case{
+		{
+			Description: "stats",
+			Command:     test.Command("stats", "--no-stream", "--no-trunc"),
+			Expected: func(data test.Data, helpers test.Helpers) *test.Expected {
+				return &test.Expected{
+					Output: test.Contains(data.Get("id")),
+				}
+			},
+		},
+		{
+			Description: "container stats",
+			Command:     test.Command("container", "stats", "--no-stream", "--no-trunc"),
+			Expected: func(data test.Data, helpers test.Helpers) *test.Expected {
+				return &test.Expected{
+					Output: test.Contains(data.Get("id")),
+				}
+			},
+		},
+		{
+			Description: "stats ID",
+			Command: func(data test.Data, helpers test.Helpers) test.TestableCommand {
+				return helpers.Command("stats", "--no-stream", data.Get("id"))
+			},
+			Expected: test.Expects(0, nil, nil),
+		},
+		{
+			Description: "container stats ID",
+			Command: func(data test.Data, helpers test.Helpers) test.TestableCommand {
+				return helpers.Command("container", "stats", "--no-stream", data.Get("id"))
+			},
+			Expected: test.Expects(0, nil, nil),
+		},
+		{
+			Description: "no mem limit set",
+			Command: func(data test.Data, helpers test.Helpers) test.TestableCommand {
+				return helpers.Command("stats", "--no-stream")
+			},
+			// https://github.com/containerd/nerdctl/issues/1240
+			// nerdctl used to print UINT64_MAX as the memory limit, so, ensure it does no more
+			Expected: test.Expects(0, nil, test.DoesNotContain("16EiB")),
+		},
+		{
+			Description: "mem limit set",
+			Command: func(data test.Data, helpers test.Helpers) test.TestableCommand {
+				return helpers.Command("stats", "--no-stream")
+			},
+			Expected: test.Expects(0, nil, test.Contains("1GiB")),
+		},
+	}
+
+	testCase.Run(t)
+}