зеркало из https://github.com/microsoft/docker.git
76 строки
1.7 KiB
Go
76 строки
1.7 KiB
Go
/*
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Utility for testing cgroup operations.
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Creates a mock of the cgroup filesystem for the duration of the test.
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*/
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package fs
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import (
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"fmt"
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"io/ioutil"
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"log"
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"os"
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"testing"
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)
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type cgroupTestUtil struct {
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// data to use in tests.
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CgroupData *data
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// Path to the mock cgroup directory.
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CgroupPath string
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// Temporary directory to store mock cgroup filesystem.
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tempDir string
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t *testing.T
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}
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// Creates a new test util for the specified subsystem
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func NewCgroupTestUtil(subsystem string, t *testing.T) *cgroupTestUtil {
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d := &data{}
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tempDir, err := ioutil.TempDir("", fmt.Sprintf("%s_cgroup_test", subsystem))
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if err != nil {
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t.Fatal(err)
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}
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d.root = tempDir
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testCgroupPath, err := d.path(subsystem)
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if err != nil {
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t.Fatal(err)
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}
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// Ensure the full mock cgroup path exists.
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err = os.MkdirAll(testCgroupPath, 0755)
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if err != nil {
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t.Fatal(err)
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}
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return &cgroupTestUtil{CgroupData: d, CgroupPath: testCgroupPath, tempDir: tempDir, t: t}
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}
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func (c *cgroupTestUtil) cleanup() {
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os.RemoveAll(c.tempDir)
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}
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// Write the specified contents on the mock of the specified cgroup files.
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func (c *cgroupTestUtil) writeFileContents(fileContents map[string]string) {
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for file, contents := range fileContents {
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err := writeFile(c.CgroupPath, file, contents)
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if err != nil {
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c.t.Fatal(err)
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}
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}
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}
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// Expect the specified stats.
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func expectStats(t *testing.T, expected, actual map[string]float64) {
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for stat, expectedValue := range expected {
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actualValue, ok := actual[stat]
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if !ok {
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log.Printf("Expected stat %s to exist: %s", stat, actual)
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t.Fail()
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} else if actualValue != expectedValue {
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log.Printf("Expected stats %s to have value %f but had %f instead", stat, expectedValue, actualValue)
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t.Fail()
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}
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}
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}
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