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moby--moby/builder/dockerfile/evaluator_test.go

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package dockerfile
import (
"io/ioutil"
"strings"
"testing"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/builder"
"github.com/docker/docker/builder/dockerfile/parser"
"github.com/docker/docker/pkg/archive"
"github.com/docker/docker/pkg/reexec"
)
type dispatchTestCase struct {
name, dockerfile, expectedError string
files map[string]string
}
func init() {
reexec.Init()
}
func initDispatchTestCases() []dispatchTestCase {
dispatchTestCases := []dispatchTestCase{{
name: "copyEmptyWhitespace",
dockerfile: `COPY
quux \
bar`,
expectedError: "COPY requires at least two arguments",
},
{
name: "ONBUILD forbidden FROM",
dockerfile: "ONBUILD FROM scratch",
expectedError: "FROM isn't allowed as an ONBUILD trigger",
files: nil,
},
{
name: "ONBUILD forbidden MAINTAINER",
dockerfile: "ONBUILD MAINTAINER docker.io",
expectedError: "MAINTAINER isn't allowed as an ONBUILD trigger",
files: nil,
},
{
name: "ARG two arguments",
dockerfile: "ARG foo bar",
expectedError: "ARG requires exactly one argument",
files: nil,
},
{
name: "MAINTAINER unknown flag",
dockerfile: "MAINTAINER --boo joe@example.com",
expectedError: "Unknown flag: boo",
files: nil,
},
{
name: "ADD multiple files to file",
dockerfile: "ADD file1.txt file2.txt test",
expectedError: "When using ADD with more than one source file, the destination must be a directory and end with a /",
files: map[string]string{"file1.txt": "test1", "file2.txt": "test2"},
},
{
name: "JSON ADD multiple files to file",
dockerfile: `ADD ["file1.txt", "file2.txt", "test"]`,
expectedError: "When using ADD with more than one source file, the destination must be a directory and end with a /",
files: map[string]string{"file1.txt": "test1", "file2.txt": "test2"},
},
{
name: "Wildcard ADD multiple files to file",
dockerfile: "ADD file*.txt test",
expectedError: "When using ADD with more than one source file, the destination must be a directory and end with a /",
files: map[string]string{"file1.txt": "test1", "file2.txt": "test2"},
},
{
name: "Wildcard JSON ADD multiple files to file",
dockerfile: `ADD ["file*.txt", "test"]`,
expectedError: "When using ADD with more than one source file, the destination must be a directory and end with a /",
files: map[string]string{"file1.txt": "test1", "file2.txt": "test2"},
},
{
name: "COPY multiple files to file",
dockerfile: "COPY file1.txt file2.txt test",
expectedError: "When using COPY with more than one source file, the destination must be a directory and end with a /",
files: map[string]string{"file1.txt": "test1", "file2.txt": "test2"},
},
{
name: "JSON COPY multiple files to file",
dockerfile: `COPY ["file1.txt", "file2.txt", "test"]`,
expectedError: "When using COPY with more than one source file, the destination must be a directory and end with a /",
files: map[string]string{"file1.txt": "test1", "file2.txt": "test2"},
},
{
name: "ADD multiple files to file with whitespace",
dockerfile: `ADD [ "test file1.txt", "test file2.txt", "test" ]`,
expectedError: "When using ADD with more than one source file, the destination must be a directory and end with a /",
files: map[string]string{"test file1.txt": "test1", "test file2.txt": "test2"},
},
{
name: "COPY multiple files to file with whitespace",
dockerfile: `COPY [ "test file1.txt", "test file2.txt", "test" ]`,
expectedError: "When using COPY with more than one source file, the destination must be a directory and end with a /",
files: map[string]string{"test file1.txt": "test1", "test file2.txt": "test2"},
},
{
name: "COPY wildcard no files",
dockerfile: `COPY file*.txt /tmp/`,
expectedError: "No source files were specified",
files: nil,
},
{
name: "COPY url",
dockerfile: `COPY https://index.docker.io/robots.txt /`,
expectedError: "Source can't be a URL for COPY",
files: nil,
},
{
name: "Chaining ONBUILD",
dockerfile: `ONBUILD ONBUILD RUN touch foobar`,
expectedError: "Chaining ONBUILD via `ONBUILD ONBUILD` isn't allowed",
files: nil,
},
{
name: "Invalid instruction",
dockerfile: `foo bar`,
expectedError: "Unknown instruction: FOO",
files: nil,
}}
return dispatchTestCases
}
func TestDispatch(t *testing.T) {
testCases := initDispatchTestCases()
for _, testCase := range testCases {
executeTestCase(t, testCase)
}
}
func executeTestCase(t *testing.T, testCase dispatchTestCase) {
contextDir, cleanup := createTestTempDir(t, "", "builder-dockerfile-test")
defer cleanup()
for filename, content := range testCase.files {
createTestTempFile(t, contextDir, filename, content, 0777)
}
tarStream, err := archive.Tar(contextDir, archive.Uncompressed)
if err != nil {
t.Fatalf("Error when creating tar stream: %s", err)
}
defer func() {
if err = tarStream.Close(); err != nil {
t.Fatalf("Error when closing tar stream: %s", err)
}
}()
context, err := builder.MakeTarSumContext(tarStream)
if err != nil {
t.Fatalf("Error when creating tar context: %s", err)
}
defer func() {
if err = context.Close(); err != nil {
t.Fatalf("Error when closing tar context: %s", err)
}
}()
r := strings.NewReader(testCase.dockerfile)
d := parser.Directive{}
parser.SetEscapeToken(parser.DefaultEscapeToken, &d)
n, err := parser.Parse(r, &d)
if err != nil {
t.Fatalf("Error when parsing Dockerfile: %s", err)
}
config := &container.Config{}
options := &types.ImageBuildOptions{}
b := &Builder{runConfig: config, options: options, Stdout: ioutil.Discard, context: context}
err = b.dispatch(0, len(n.Children), n.Children[0])
if err == nil {
t.Fatalf("No error when executing test %s", testCase.name)
}
if !strings.Contains(err.Error(), testCase.expectedError) {
t.Fatalf("Wrong error message. Should be \"%s\". Got \"%s\"", testCase.expectedError, err.Error())
}
}