feat(pdfengines): add embed feature

test/integration/scenario/scenario.go

@@ -735,6 +735,41 @@ func (s *scenario) thePdfShouldBeSetToLandscapeOrientation(ctx context.Context,
 	return nil
 }
 
+func (s *scenario) thePdfShouldHaveTheFollowingEmbedsInIt(ctx context.Context, name, should string, embed string) error {
+	path, err := s.getPath(name)
+	if err != nil {
+		return fmt.Errorf("get path %q: %w", name, err)
+	}
+	invert := should == "should NOT"
+
+	cmd := []string{
+		"verapdf",
+		"--off",
+		"--loglevel",
+		"0",
+		"--extract",
+		"embeddedFile",
+		name,
+	}
+
+	output, err := execCommandInIntegrationToolsContainer(ctx, cmd, path)
+	if err != nil {
+		return fmt.Errorf("exec %q: %w", cmd, err)
+	}
+
+	found := strings.Contains(output, fmt.Sprintf("<fileName>%s</fileName>", embed))
+
+	if invert && found {
+		return fmt.Errorf("embed %q found", embed)
+	}
+
+	if !invert && !found {
+		return fmt.Errorf("embed %q not found", embed)
+	}
+
+	return nil
+}
+
 func (s *scenario) thePdfShouldHaveTheFollowingContentAtPage(ctx context.Context, name, kind string, page int, expected *godog.DocString) error {
 	var path string
 	if !strings.HasPrefix(name, "*_") {
@@ -927,6 +962,7 @@ func InitializeScenario(ctx *godog.ScenarioContext) {
 	ctx.Then(`^the "([^"]*)" PDF should have (\d+) page\(s\)$`, s.thePdfShouldHavePages)
 	ctx.Then(`^the "([^"]*)" PDF (should|should NOT) be set to landscape orientation$`, s.thePdfShouldBeSetToLandscapeOrientation)
 	ctx.Then(`^the "([^"]*)" PDF (should|should NOT) have the following content at page (\d+):$`, s.thePdfShouldHaveTheFollowingContentAtPage)
+	ctx.Then(`^the "([^"]*)" PDF (should|should NOT) have the "([^"]*)" file embedded in it$`, s.thePdfShouldHaveTheFollowingEmbedsInIt)
 	ctx.After(func(ctx context.Context, sc *godog.Scenario, err error) (context.Context, error) {
 		if s.gotenbergContainer != nil {
 			errTerminate := s.gotenbergContainer.Terminate(ctx, testcontainers.StopTimeout(0))
@@ -950,3 +986,14 @@ func InitializeScenario(ctx *godog.ScenarioContext) {
 		return ctx, nil
 	})
 }
+
+func (s *scenario) getPath(name string) (string, error) {
+	path := fmt.Sprintf("%s/%s/%s", s.workdir, s.resp.Header().Get("Gotenberg-Trace"), name)
+
+	_, err := os.Stat(path)
+	if os.IsNotExist(err) {
+		return "", fmt.Errorf("PDF %q does not exist", path)
+	}
+
+	return path, nil
+}