105 lines
2.8 KiB
Go
105 lines
2.8 KiB
Go
package main
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import (
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"os/exec"
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"strings"
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"testing"
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)
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// ensure that an added file shows up in docker diff
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func TestDiffFilenameShownInOutput(t *testing.T) {
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containerCmd := `echo foo > /root/bar`
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runCmd := exec.Command(dockerBinary, "run", "-d", "busybox", "sh", "-c", containerCmd)
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out, _, err := runCommandWithOutput(runCmd)
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if err != nil {
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t.Fatalf("failed to start the container: %s, %v", out, err)
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}
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cleanCID := stripTrailingCharacters(out)
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diffCmd := exec.Command(dockerBinary, "diff", cleanCID)
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out, _, err = runCommandWithOutput(diffCmd)
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if err != nil {
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t.Fatalf("failed to run diff: %s %v", out, err)
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}
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found := false
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for _, line := range strings.Split(out, "\n") {
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if strings.Contains("A /root/bar", line) {
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found = true
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break
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}
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}
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if !found {
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t.Errorf("couldn't find the new file in docker diff's output: %v", out)
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}
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deleteContainer(cleanCID)
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logDone("diff - check if created file shows up")
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}
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// test to ensure GH #3840 doesn't occur any more
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func TestDiffEnsureDockerinitFilesAreIgnored(t *testing.T) {
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// this is a list of files which shouldn't show up in `docker diff`
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dockerinitFiles := []string{"/etc/resolv.conf", "/etc/hostname", "/etc/hosts", "/.dockerinit", "/.dockerenv"}
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// we might not run into this problem from the first run, so start a few containers
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for i := 0; i < 20; i++ {
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containerCmd := `echo foo > /root/bar`
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runCmd := exec.Command(dockerBinary, "run", "-d", "busybox", "sh", "-c", containerCmd)
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out, _, err := runCommandWithOutput(runCmd)
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if err != nil {
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t.Fatal(out, err)
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}
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cleanCID := stripTrailingCharacters(out)
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diffCmd := exec.Command(dockerBinary, "diff", cleanCID)
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out, _, err = runCommandWithOutput(diffCmd)
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if err != nil {
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t.Fatalf("failed to run diff: %s, %v", out, err)
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}
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deleteContainer(cleanCID)
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for _, filename := range dockerinitFiles {
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if strings.Contains(out, filename) {
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t.Errorf("found file which should've been ignored %v in diff output", filename)
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}
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}
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}
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logDone("diff - check if ignored files show up in diff")
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}
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func TestDiffEnsureOnlyKmsgAndPtmx(t *testing.T) {
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runCmd := exec.Command(dockerBinary, "run", "-d", "busybox", "sleep", "0")
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out, _, err := runCommandWithOutput(runCmd)
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if err != nil {
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t.Fatal(out, err)
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}
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cleanCID := stripTrailingCharacters(out)
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diffCmd := exec.Command(dockerBinary, "diff", cleanCID)
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out, _, err = runCommandWithOutput(diffCmd)
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if err != nil {
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t.Fatalf("failed to run diff: %s, %v", out, err)
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}
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deleteContainer(cleanCID)
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expected := map[string]bool{
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"C /dev": true,
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"A /dev/full": true, // busybox
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"C /dev/ptmx": true, // libcontainer
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"A /dev/kmsg": true, // lxc
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}
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for _, line := range strings.Split(out, "\n") {
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if line != "" && !expected[line] {
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t.Errorf("%q is shown in the diff but shouldn't", line)
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}
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}
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logDone("diff - ensure that only kmsg and ptmx in diff")
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}
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