DockerCLI/cli/command/image/build/context_test.go

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package build
import (
"archive/tar"
"bytes"
"io"
"os"
"path/filepath"
"runtime"
"strings"
"testing"
"github.com/docker/docker/pkg/archive"
"github.com/moby/patternmatcher"
"gotest.tools/v3/assert"
is "gotest.tools/v3/assert/cmp"
)
const dockerfileContents = "FROM busybox"
func prepareEmpty(_ *testing.T) string {
return ""
}
func prepareNoFiles(t *testing.T) string {
return createTestTempDir(t)
}
func prepareOneFile(t *testing.T) string {
contextDir := createTestTempDir(t)
createTestTempFile(t, contextDir, DefaultDockerfileName, dockerfileContents)
return contextDir
}
func testValidateContextDirectory(t *testing.T, prepare func(t *testing.T) string, excludes []string) {
contextDir := prepare(t)
err := ValidateContextDirectory(contextDir, excludes)
assert.NilError(t, err)
}
func TestGetContextFromLocalDirNoDockerfile(t *testing.T) {
contextDir := createTestTempDir(t)
_, _, err := GetContextFromLocalDir(contextDir, "")
assert.ErrorContains(t, err, "Dockerfile")
}
func TestGetContextFromLocalDirNotExistingDir(t *testing.T) {
contextDir := createTestTempDir(t)
fakePath := filepath.Join(contextDir, "fake")
_, _, err := GetContextFromLocalDir(fakePath, "")
assert.ErrorContains(t, err, "fake")
}
func TestGetContextFromLocalDirNotExistingDockerfile(t *testing.T) {
contextDir := createTestTempDir(t)
fakePath := filepath.Join(contextDir, "fake")
_, _, err := GetContextFromLocalDir(contextDir, fakePath)
assert.ErrorContains(t, err, "fake")
}
func TestGetContextFromLocalDirWithNoDirectory(t *testing.T) {
contextDir := createTestTempDir(t)
createTestTempFile(t, contextDir, DefaultDockerfileName, dockerfileContents)
chdir(t, contextDir)
absContextDir, relDockerfile, err := GetContextFromLocalDir(contextDir, "")
assert.NilError(t, err)
assert.Check(t, is.Equal(contextDir, absContextDir))
assert.Check(t, is.Equal(DefaultDockerfileName, relDockerfile))
}
func TestGetContextFromLocalDirWithDockerfile(t *testing.T) {
contextDir := createTestTempDir(t)
createTestTempFile(t, contextDir, DefaultDockerfileName, dockerfileContents)
absContextDir, relDockerfile, err := GetContextFromLocalDir(contextDir, "")
assert.NilError(t, err)
assert.Check(t, is.Equal(contextDir, absContextDir))
assert.Check(t, is.Equal(DefaultDockerfileName, relDockerfile))
}
func TestGetContextFromLocalDirLocalFile(t *testing.T) {
contextDir := createTestTempDir(t)
createTestTempFile(t, contextDir, DefaultDockerfileName, dockerfileContents)
testFilename := createTestTempFile(t, contextDir, "tmpTest", "test")
absContextDir, relDockerfile, err := GetContextFromLocalDir(testFilename, "")
if err == nil {
t.Fatalf("Error should not be nil")
}
if absContextDir != "" {
t.Fatalf("Absolute directory path should be empty, got: %s", absContextDir)
}
if relDockerfile != "" {
t.Fatalf("Relative path to Dockerfile should be empty, got: %s", relDockerfile)
}
}
func TestGetContextFromLocalDirWithCustomDockerfile(t *testing.T) {
contextDir := createTestTempDir(t)
chdir(t, contextDir)
createTestTempFile(t, contextDir, DefaultDockerfileName, dockerfileContents)
absContextDir, relDockerfile, err := GetContextFromLocalDir(contextDir, DefaultDockerfileName)
assert.NilError(t, err)
assert.Check(t, is.Equal(contextDir, absContextDir))
assert.Check(t, is.Equal(DefaultDockerfileName, relDockerfile))
}
func TestGetContextFromReaderString(t *testing.T) {
tarArchive, relDockerfile, err := GetContextFromReader(io.NopCloser(strings.NewReader(dockerfileContents)), "")
if err != nil {
t.Fatalf("Error when executing GetContextFromReader: %s", err)
}
tarReader := tar.NewReader(tarArchive)
_, err = tarReader.Next()
if err != nil {
t.Fatalf("Error when reading tar archive: %s", err)
}
buff := new(bytes.Buffer)
buff.ReadFrom(tarReader)
contents := buff.String()
_, err = tarReader.Next()
if err != io.EOF {
t.Fatalf("Tar stream too long: %s", err)
}
assert.NilError(t, tarArchive.Close())
if dockerfileContents != contents {
t.Fatalf("Uncompressed tar archive does not equal: %s, got: %s", dockerfileContents, contents)
}
if relDockerfile != DefaultDockerfileName {
t.Fatalf("Relative path not equals %s, got: %s", DefaultDockerfileName, relDockerfile)
}
}
func TestGetContextFromReaderTar(t *testing.T) {
contextDir := createTestTempDir(t)
createTestTempFile(t, contextDir, DefaultDockerfileName, dockerfileContents)
tarStream, err := archive.Tar(contextDir, archive.Uncompressed)
assert.NilError(t, err)
tarArchive, relDockerfile, err := GetContextFromReader(tarStream, DefaultDockerfileName)
assert.NilError(t, err)
tarReader := tar.NewReader(tarArchive)
header, err := tarReader.Next()
assert.NilError(t, err)
if header.Name != DefaultDockerfileName {
t.Fatalf("Dockerfile name should be: %s, got: %s", DefaultDockerfileName, header.Name)
}
buff := new(bytes.Buffer)
buff.ReadFrom(tarReader)
contents := buff.String()
_, err = tarReader.Next()
if err != io.EOF {
t.Fatalf("Tar stream too long: %s", err)
}
assert.NilError(t, tarArchive.Close())
if dockerfileContents != contents {
t.Fatalf("Uncompressed tar archive does not equal: %s, got: %s", dockerfileContents, contents)
}
if relDockerfile != DefaultDockerfileName {
t.Fatalf("Relative path not equals %s, got: %s", DefaultDockerfileName, relDockerfile)
}
}
func TestValidateContextDirectoryEmptyContext(t *testing.T) {
// This isn't a valid test on Windows. See https://play.golang.org/p/RR6z6jxR81.
// The test will ultimately end up calling filepath.Abs(""). On Windows,
// golang will error. On Linux, golang will return /. Due to there being
// drive letters on Windows, this is probably the correct behaviour for
// Windows.
if runtime.GOOS == "windows" {
t.Skip("Invalid test on Windows")
}
testValidateContextDirectory(t, prepareEmpty, []string{})
}
func TestValidateContextDirectoryContextWithNoFiles(t *testing.T) {
testValidateContextDirectory(t, prepareNoFiles, []string{})
}
func TestValidateContextDirectoryWithOneFile(t *testing.T) {
testValidateContextDirectory(t, prepareOneFile, []string{})
}
func TestValidateContextDirectoryWithOneFileExcludes(t *testing.T) {
testValidateContextDirectory(t, prepareOneFile, []string{DefaultDockerfileName})
}
// createTestTempDir creates a temporary directory for testing. It returns the
// created path. When an error occurs, it terminates the test.
func createTestTempDir(t *testing.T) string {
t.Helper()
path := t.TempDir()
// Eval Symlinks is needed to account for macOS TMP using symlinks
path, err := filepath.EvalSymlinks(path)
assert.NilError(t, err)
return path
}
// createTestTempFile creates a temporary file within dir with specific contents and permissions.
// When an error occurs, it terminates the test
func createTestTempFile(t *testing.T, dir, filename, contents string) string {
t.Helper()
filePath := filepath.Join(dir, filename)
err := os.WriteFile(filePath, []byte(contents), 0o777)
assert.NilError(t, err)
return filePath
}
// chdir changes current working directory to dir.
// It returns a function which changes working directory back to the previous one.
// This function is meant to be executed as a deferred call.
// When an error occurs, it terminates the test.
func chdir(t *testing.T, dir string) {
workingDirectory, err := os.Getwd()
assert.NilError(t, err)
assert.NilError(t, os.Chdir(dir))
t.Cleanup(func() {
assert.NilError(t, os.Chdir(workingDirectory))
})
}
func TestIsArchive(t *testing.T) {
testcases := []struct {
doc string
header []byte
expected bool
}{
{
doc: "nil is not a valid header",
header: nil,
expected: false,
},
{
doc: "invalid header bytes",
header: []byte{0x00, 0x01, 0x02},
expected: false,
},
{
doc: "header for bzip2 archive",
header: []byte{0x42, 0x5A, 0x68},
expected: true,
},
{
doc: "header for 7zip archive is not supported",
header: []byte{0x50, 0x4b, 0x03, 0x04},
expected: false,
},
}
for _, testcase := range testcases {
assert.Check(t, is.Equal(testcase.expected, IsArchive(testcase.header)), testcase.doc)
}
}
func TestDetectArchiveReader(t *testing.T) {
testcases := []struct {
file string
desc string
expected bool
}{
{
file: "../testdata/tar.test",
desc: "tar file without pax headers",
expected: true,
},
{
file: "../testdata/gittar.test",
desc: "tar file with pax headers",
expected: true,
},
{
file: "../testdata/Dockerfile.test",
desc: "not a tar file",
expected: false,
},
}
for _, testcase := range testcases {
content, err := os.Open(testcase.file)
assert.NilError(t, err)
defer content.Close()
_, isArchive, err := DetectArchiveReader(content)
assert.NilError(t, err)
assert.Check(t, is.Equal(testcase.expected, isArchive), testcase.file)
}
}
func mustPatternMatcher(t *testing.T, patterns []string) *patternmatcher.PatternMatcher {
t.Helper()
pm, err := patternmatcher.New(patterns)
if err != nil {
t.Fatal("failed to construct pattern matcher: ", err)
}
return pm
}
func TestWildcardMatches(t *testing.T) {
match, _ := filepathMatches(mustPatternMatcher(t, []string{"*"}), "fileutils.go")
if !match {
t.Errorf("failed to get a wildcard match, got %v", match)
}
}
// A simple pattern match should return true.
func TestPatternMatches(t *testing.T) {
match, _ := filepathMatches(mustPatternMatcher(t, []string{"*.go"}), "fileutils.go")
if !match {
t.Errorf("failed to get a match, got %v", match)
}
}
// An exclusion followed by an inclusion should return true.
func TestExclusionPatternMatchesPatternBefore(t *testing.T) {
match, _ := filepathMatches(mustPatternMatcher(t, []string{"!fileutils.go", "*.go"}), "fileutils.go")
if !match {
t.Errorf("failed to get true match on exclusion pattern, got %v", match)
}
}
// A folder pattern followed by an exception should return false.
func TestPatternMatchesFolderExclusions(t *testing.T) {
match, _ := filepathMatches(mustPatternMatcher(t, []string{"docs", "!docs/README.md"}), "docs/README.md")
if match {
t.Errorf("failed to get a false match on exclusion pattern, got %v", match)
}
}
// A folder pattern followed by an exception should return false.
func TestPatternMatchesFolderWithSlashExclusions(t *testing.T) {
match, _ := filepathMatches(mustPatternMatcher(t, []string{"docs/", "!docs/README.md"}), "docs/README.md")
if match {
t.Errorf("failed to get a false match on exclusion pattern, got %v", match)
}
}
// A folder pattern followed by an exception should return false.
func TestPatternMatchesFolderWildcardExclusions(t *testing.T) {
match, _ := filepathMatches(mustPatternMatcher(t, []string{"docs/*", "!docs/README.md"}), "docs/README.md")
if match {
t.Errorf("failed to get a false match on exclusion pattern, got %v", match)
}
}
// A pattern followed by an exclusion should return false.
func TestExclusionPatternMatchesPatternAfter(t *testing.T) {
match, _ := filepathMatches(mustPatternMatcher(t, []string{"*.go", "!fileutils.go"}), "fileutils.go")
if match {
t.Errorf("failed to get false match on exclusion pattern, got %v", match)
}
}
// A filename evaluating to . should return false.
func TestExclusionPatternMatchesWholeDirectory(t *testing.T) {
match, _ := filepathMatches(mustPatternMatcher(t, []string{"*.go"}), ".")
if match {
t.Errorf("failed to get false match on ., got %v", match)
}
}
// Matches with no patterns
func TestMatchesWithNoPatterns(t *testing.T) {
matches, err := filepathMatches(mustPatternMatcher(t, []string{}), "/any/path/there")
if err != nil {
t.Fatal(err)
}
if matches {
t.Fatalf("Should not have match anything")
}
}