internals_test.go 2.6 KB

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  1. package dockerfile
  2. import (
  3. "fmt"
  4. "testing"
  5. "github.com/docker/docker/api/types"
  6. "github.com/docker/docker/builder"
  7. "github.com/docker/docker/pkg/archive"
  8. "github.com/stretchr/testify/assert"
  9. "github.com/stretchr/testify/require"
  10. )
  11. func TestEmptyDockerfile(t *testing.T) {
  12. contextDir, cleanup := createTestTempDir(t, "", "builder-dockerfile-test")
  13. defer cleanup()
  14. createTestTempFile(t, contextDir, builder.DefaultDockerfileName, "", 0777)
  15. readAndCheckDockerfile(t, "emptyDockerfile", contextDir, "", "The Dockerfile (Dockerfile) cannot be empty")
  16. }
  17. func TestSymlinkDockerfile(t *testing.T) {
  18. contextDir, cleanup := createTestTempDir(t, "", "builder-dockerfile-test")
  19. defer cleanup()
  20. createTestSymlink(t, contextDir, builder.DefaultDockerfileName, "/etc/passwd")
  21. // The reason the error is "Cannot locate specified Dockerfile" is because
  22. // in the builder, the symlink is resolved within the context, therefore
  23. // Dockerfile -> /etc/passwd becomes etc/passwd from the context which is
  24. // a nonexistent file.
  25. expectedError := fmt.Sprintf("Cannot locate specified Dockerfile: %s", builder.DefaultDockerfileName)
  26. readAndCheckDockerfile(t, "symlinkDockerfile", contextDir, builder.DefaultDockerfileName, expectedError)
  27. }
  28. func TestDockerfileOutsideTheBuildContext(t *testing.T) {
  29. contextDir, cleanup := createTestTempDir(t, "", "builder-dockerfile-test")
  30. defer cleanup()
  31. expectedError := "Forbidden path outside the build context: ../../Dockerfile ()"
  32. readAndCheckDockerfile(t, "DockerfileOutsideTheBuildContext", contextDir, "../../Dockerfile", expectedError)
  33. }
  34. func TestNonExistingDockerfile(t *testing.T) {
  35. contextDir, cleanup := createTestTempDir(t, "", "builder-dockerfile-test")
  36. defer cleanup()
  37. expectedError := "Cannot locate specified Dockerfile: Dockerfile"
  38. readAndCheckDockerfile(t, "NonExistingDockerfile", contextDir, "Dockerfile", expectedError)
  39. }
  40. func readAndCheckDockerfile(t *testing.T, testName, contextDir, dockerfilePath, expectedError string) {
  41. tarStream, err := archive.Tar(contextDir, archive.Uncompressed)
  42. require.NoError(t, err)
  43. defer func() {
  44. if err = tarStream.Close(); err != nil {
  45. t.Fatalf("Error when closing tar stream: %s", err)
  46. }
  47. }()
  48. context, err := builder.MakeTarSumContext(tarStream)
  49. require.NoError(t, err)
  50. defer func() {
  51. if err = context.Close(); err != nil {
  52. t.Fatalf("Error when closing tar context: %s", err)
  53. }
  54. }()
  55. options := &types.ImageBuildOptions{
  56. Dockerfile: dockerfilePath,
  57. }
  58. b := &Builder{options: options, context: context}
  59. _, err = b.readAndParseDockerfile()
  60. assert.EqualError(t, err, expectedError)
  61. }