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moby--moby/builder/dockerfile/internals_test.go

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package dockerfile
import (
"fmt"
"testing"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/backend"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/builder"
"github.com/docker/docker/builder/remotecontext"
"github.com/docker/docker/pkg/archive"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestEmptyDockerfile(t *testing.T) {
contextDir, cleanup := createTestTempDir(t, "", "builder-dockerfile-test")
defer cleanup()
createTestTempFile(t, contextDir, builder.DefaultDockerfileName, "", 0777)
readAndCheckDockerfile(t, "emptyDockerfile", contextDir, "", "the Dockerfile (Dockerfile) cannot be empty")
}
func TestSymlinkDockerfile(t *testing.T) {
contextDir, cleanup := createTestTempDir(t, "", "builder-dockerfile-test")
defer cleanup()
createTestSymlink(t, contextDir, builder.DefaultDockerfileName, "/etc/passwd")
// The reason the error is "Cannot locate specified Dockerfile" is because
// in the builder, the symlink is resolved within the context, therefore
// Dockerfile -> /etc/passwd becomes etc/passwd from the context which is
// a nonexistent file.
expectedError := fmt.Sprintf("Cannot locate specified Dockerfile: %s", builder.DefaultDockerfileName)
readAndCheckDockerfile(t, "symlinkDockerfile", contextDir, builder.DefaultDockerfileName, expectedError)
}
func TestDockerfileOutsideTheBuildContext(t *testing.T) {
contextDir, cleanup := createTestTempDir(t, "", "builder-dockerfile-test")
defer cleanup()
expectedError := "Forbidden path outside the build context: ../../Dockerfile ()"
readAndCheckDockerfile(t, "DockerfileOutsideTheBuildContext", contextDir, "../../Dockerfile", expectedError)
}
func TestNonExistingDockerfile(t *testing.T) {
contextDir, cleanup := createTestTempDir(t, "", "builder-dockerfile-test")
defer cleanup()
expectedError := "Cannot locate specified Dockerfile: Dockerfile"
readAndCheckDockerfile(t, "NonExistingDockerfile", contextDir, "Dockerfile", expectedError)
}
func readAndCheckDockerfile(t *testing.T, testName, contextDir, dockerfilePath, expectedError string) {
tarStream, err := archive.Tar(contextDir, archive.Uncompressed)
require.NoError(t, err)
defer func() {
if err = tarStream.Close(); err != nil {
t.Fatalf("Error when closing tar stream: %s", err)
}
}()
if dockerfilePath == "" { // handled in BuildWithContext
dockerfilePath = builder.DefaultDockerfileName
}
config := backend.BuildConfig{
Options: &types.ImageBuildOptions{Dockerfile: dockerfilePath},
Source: tarStream,
}
_, _, err = remotecontext.Detect(config)
assert.EqualError(t, err, expectedError)
}
func TestCopyRunConfig(t *testing.T) {
defaultEnv := []string{"foo=1"}
defaultCmd := []string{"old"}
var testcases = []struct {
doc string
modifiers []runConfigModifier
expected *container.Config
}{
{
doc: "Set the command",
modifiers: []runConfigModifier{withCmd([]string{"new"})},
expected: &container.Config{
Cmd: []string{"new"},
Env: defaultEnv,
},
},
{
doc: "Set the command to a comment",
modifiers: []runConfigModifier{withCmdComment("comment")},
expected: &container.Config{
Cmd: append(defaultShell, "#(nop) ", "comment"),
Env: defaultEnv,
},
},
{
doc: "Set the command and env",
modifiers: []runConfigModifier{
withCmd([]string{"new"}),
withEnv([]string{"one", "two"}),
},
expected: &container.Config{
Cmd: []string{"new"},
Env: []string{"one", "two"},
},
},
}
for _, testcase := range testcases {
runConfig := &container.Config{
Cmd: defaultCmd,
Env: defaultEnv,
}
runConfigCopy := copyRunConfig(runConfig, testcase.modifiers...)
assert.Equal(t, testcase.expected, runConfigCopy, testcase.doc)
// Assert the original was not modified
assert.NotEqual(t, runConfig, runConfigCopy, testcase.doc)
}
}