Merge branch 'main' into Baliedge/PIP-2552-consistent-ordering

datamodel/low/v3/create_document_test.go

@@ -2,11 +2,15 @@ package v3
 
 import (
 	"fmt"
+	"github.com/pb33f/libopenapi/index"
+	"github.com/pb33f/libopenapi/utils"
+	"log/slog"
+	"net/http"
+	"net/url"
 	"os"
 	"testing"
 
 	"github.com/pb33f/libopenapi/datamodel"
-	"github.com/pb33f/libopenapi/datamodel/low/base"
 	"github.com/pb33f/libopenapi/orderedmap"
 	"github.com/stretchr/testify/assert"
 )
@@ -19,9 +23,9 @@ func initTest() {
 	}
 	data, _ := os.ReadFile("../../../test_specs/burgershop.openapi.yaml")
 	info, _ := datamodel.ExtractSpecInfo(data)
-	var err []error
+	var err error
 	// deprecated function test.
-	doc, err = CreateDocument(info)
+	doc, err = CreateDocumentFromConfig(info, datamodel.NewDocumentConfiguration())
 	if err != nil {
 		panic("broken something")
 	}
@@ -31,10 +35,7 @@ func BenchmarkCreateDocument(b *testing.B) {
 	data, _ := os.ReadFile("../../../test_specs/burgershop.openapi.yaml")
 	info, _ := datamodel.ExtractSpecInfo(data)
 	for i := 0; i < b.N; i++ {
-		doc, _ = CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{
-			AllowFileReferences:   false,
-			AllowRemoteReferences: false,
-		})
+		doc, _ = CreateDocumentFromConfig(info, datamodel.NewDocumentConfiguration())
 	}
 }
 
@@ -42,47 +43,145 @@ func BenchmarkCreateDocument_Circular(b *testing.B) {
 	data, _ := os.ReadFile("../../../test_specs/circular-tests.yaml")
 	info, _ := datamodel.ExtractSpecInfo(data)
 	for i := 0; i < b.N; i++ {
-		_, err := CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{
-			AllowFileReferences:   false,
-			AllowRemoteReferences: false,
-		})
-		if err != nil {
-			panic("this should not error")
-		}
-	}
-}
-
-func BenchmarkCreateDocument_k8s(b *testing.B) {
-
-	data, _ := os.ReadFile("../../../test_specs/k8s.json")
-	info, _ := datamodel.ExtractSpecInfo(data)
-
-	for i := 0; i < b.N; i++ {
-
-		_, err := CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{
-			AllowFileReferences:   false,
-			AllowRemoteReferences: false,
-		})
-		if err != nil {
-			panic("this should not error")
+		_, err := CreateDocumentFromConfig(info, datamodel.NewDocumentConfiguration())
+		if err == nil {
+			panic("this should error, it has circular references")
 		}
 	}
 }
 
 func TestCircularReferenceError(t *testing.T) {
-
 	data, _ := os.ReadFile("../../../test_specs/circular-tests.yaml")
 	info, _ := datamodel.ExtractSpecInfo(data)
-	circDoc, err := CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{
-		AllowFileReferences:   false,
-		AllowRemoteReferences: false,
-	})
+	circDoc, err := CreateDocumentFromConfig(info, datamodel.NewDocumentConfiguration())
+
 	assert.NotNil(t, circDoc)
-	assert.Len(t, err, 3)
+	assert.Error(t, err)
+
+	assert.Len(t, utils.UnwrapErrors(err), 3)
+}
+
+func TestRolodexLocalFileSystem(t *testing.T) {
+	data, _ := os.ReadFile("../../../test_specs/first.yaml")
+	info, _ := datamodel.ExtractSpecInfo(data)
+
+	cf := datamodel.NewDocumentConfiguration()
+	cf.BasePath = "../../../test_specs"
+	cf.FileFilter = []string{"first.yaml", "second.yaml", "third.yaml"}
+	lDoc, err := CreateDocumentFromConfig(info, cf)
+	assert.NotNil(t, lDoc)
+	assert.NoError(t, err)
+}
+
+func TestRolodexLocalFileSystem_ProvideNonRolodexFS(t *testing.T) {
+	data, _ := os.ReadFile("../../../test_specs/first.yaml")
+	info, _ := datamodel.ExtractSpecInfo(data)
+	baseDir := "../../../test_specs"
+
+	cf := datamodel.NewDocumentConfiguration()
+	cf.BasePath = baseDir
+	cf.FileFilter = []string{"first.yaml", "second.yaml", "third.yaml"}
+	cf.LocalFS = os.DirFS(baseDir)
+	lDoc, err := CreateDocumentFromConfig(info, cf)
+	assert.NotNil(t, lDoc)
+	assert.Error(t, err)
+}
+
+func TestRolodexLocalFileSystem_ProvideRolodexFS(t *testing.T) {
+	data, _ := os.ReadFile("../../../test_specs/first.yaml")
+	info, _ := datamodel.ExtractSpecInfo(data)
+	baseDir := "../../../test_specs"
+	cf := datamodel.NewDocumentConfiguration()
+	cf.BasePath = baseDir
+	cf.FileFilter = []string{"first.yaml", "second.yaml", "third.yaml"}
+
+	localFS, lErr := index.NewLocalFSWithConfig(&index.LocalFSConfig{
+		BaseDirectory: baseDir,
+		DirFS:         os.DirFS(baseDir),
+		FileFilters:   cf.FileFilter,
+	})
+	cf.LocalFS = localFS
+
+	assert.NoError(t, lErr)
+	lDoc, err := CreateDocumentFromConfig(info, cf)
+	assert.NotNil(t, lDoc)
+	assert.NoError(t, err)
+}
+
+func TestRolodexLocalFileSystem_BadPath(t *testing.T) {
+	data, _ := os.ReadFile("../../../test_specs/first.yaml")
+	info, _ := datamodel.ExtractSpecInfo(data)
+
+	cf := datamodel.NewDocumentConfiguration()
+	cf.BasePath = "/NOWHERE"
+	cf.FileFilter = []string{"first.yaml", "second.yaml", "third.yaml"}
+	lDoc, err := CreateDocumentFromConfig(info, cf)
+	assert.NotNil(t, lDoc)
+	assert.Error(t, err)
+}
+
+func TestRolodexRemoteFileSystem(t *testing.T) {
+	data, _ := os.ReadFile("../../../test_specs/first.yaml")
+	info, _ := datamodel.ExtractSpecInfo(data)
+
+	cf := datamodel.NewDocumentConfiguration()
+	cf.Logger = slog.New(slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{
+		Level: slog.LevelDebug,
+	}))
+
+	baseUrl := "https://raw.githubusercontent.com/pb33f/libopenapi/main/test_specs"
+	u, _ := url.Parse(baseUrl)
+	cf.BaseURL = u
+	lDoc, err := CreateDocumentFromConfig(info, cf)
+	assert.NotNil(t, lDoc)
+	assert.NoError(t, err)
+}
+
+func TestRolodexRemoteFileSystem_BadBase(t *testing.T) {
+	data, _ := os.ReadFile("../../../test_specs/first.yaml")
+	info, _ := datamodel.ExtractSpecInfo(data)
+
+	cf := datamodel.NewDocumentConfiguration()
+
+	baseUrl := "https://no-no-this-will-not-work-it-just-will-not-get-the-job-done-mate.com"
+	u, _ := url.Parse(baseUrl)
+	cf.BaseURL = u
+	lDoc, err := CreateDocumentFromConfig(info, cf)
+	assert.NotNil(t, lDoc)
+	assert.Error(t, err)
+}
+
+func TestRolodexRemoteFileSystem_CustomRemote_NoBaseURL(t *testing.T) {
+	data, _ := os.ReadFile("../../../test_specs/first.yaml")
+	info, _ := datamodel.ExtractSpecInfo(data)
+
+	cf := datamodel.NewDocumentConfiguration()
+	cf.RemoteFS, _ = index.NewRemoteFSWithConfig(&index.SpecIndexConfig{})
+	lDoc, err := CreateDocumentFromConfig(info, cf)
+	assert.NotNil(t, lDoc)
+	assert.Error(t, err)
+}
+
+func TestRolodexRemoteFileSystem_CustomHttpHandler(t *testing.T) {
+	data, _ := os.ReadFile("../../../test_specs/first.yaml")
+	info, _ := datamodel.ExtractSpecInfo(data)
+
+	cf := datamodel.NewDocumentConfiguration()
+	cf.RemoteURLHandler = http.Get
+	baseUrl := "https://no-no-this-will-not-work-it-just-will-not-get-the-job-done-mate.com"
+	u, _ := url.Parse(baseUrl)
+	cf.BaseURL = u
+
+	pizza := func(url string) (resp *http.Response, err error) {
+		return nil, nil
+	}
+	cf.RemoteURLHandler = pizza
+	lDoc, err := CreateDocumentFromConfig(info, cf)
+	assert.NotNil(t, lDoc)
+	assert.Error(t, err)
 }
 
 func TestCircularReference_IgnoreArray(t *testing.T) {
-
 	spec := `openapi: 3.1.0
 components:
   schemas:
@@ -102,16 +201,13 @@ components:
 
 	info, _ := datamodel.ExtractSpecInfo([]byte(spec))
 	circDoc, err := CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{
-		AllowFileReferences:           false,
-		AllowRemoteReferences:         false,
 		IgnoreArrayCircularReferences: true,
 	})
 	assert.NotNil(t, circDoc)
-	assert.Len(t, err, 0)
+	assert.Len(t, utils.UnwrapErrors(err), 0)
 }
 
 func TestCircularReference_IgnorePoly(t *testing.T) {
-
 	spec := `openapi: 3.1.0
 components:
   schemas:
@@ -131,12 +227,10 @@ components:
 
 	info, _ := datamodel.ExtractSpecInfo([]byte(spec))
 	circDoc, err := CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{
-		AllowFileReferences:                 false,
-		AllowRemoteReferences:               false,
 		IgnorePolymorphicCircularReferences: true,
 	})
 	assert.NotNil(t, circDoc)
-	assert.Len(t, err, 0)
+	assert.Len(t, utils.UnwrapErrors(err), 0)
 }
 
 func BenchmarkCreateDocument_Stripe(b *testing.B) {
@@ -144,10 +238,7 @@ func BenchmarkCreateDocument_Stripe(b *testing.B) {
 	info, _ := datamodel.ExtractSpecInfo(data)
 
 	for i := 0; i < b.N; i++ {
-		_, err := CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{
-			AllowFileReferences:   false,
-			AllowRemoteReferences: false,
-		})
+		_, err := CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{})
 		if err != nil {
 			panic("this should not error")
 		}
@@ -158,10 +249,7 @@ func BenchmarkCreateDocument_Petstore(b *testing.B) {
 	data, _ := os.ReadFile("../../../test_specs/petstorev3.json")
 	info, _ := datamodel.ExtractSpecInfo(data)
 	for i := 0; i < b.N; i++ {
-		_, err := CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{
-			AllowFileReferences:   false,
-			AllowRemoteReferences: false,
-		})
+		_, err := CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{})
 		if err != nil {
 			panic("this should not error")
 		}
@@ -169,15 +257,10 @@ func BenchmarkCreateDocument_Petstore(b *testing.B) {
 }
 
 func TestCreateDocumentStripe(t *testing.T) {
-
 	data, _ := os.ReadFile("../../../test_specs/stripe.yaml")
 	info, _ := datamodel.ExtractSpecInfo(data)
-	d, err := CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{
-		AllowFileReferences:   false,
-		AllowRemoteReferences: false,
-		BasePath:              "/here",
-	})
-	assert.Len(t, err, 3)
+	d, err := CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{})
+	assert.Len(t, utils.UnwrapErrors(err), 3)
 
 	assert.Equal(t, "3.0.0", d.Version.Value)
 	assert.Equal(t, "Stripe API", d.Info.Value.Title.Value)
@@ -234,16 +317,14 @@ func TestCreateDocument_WebHooks(t *testing.T) {
 }
 
 func TestCreateDocument_WebHooks_Error(t *testing.T) {
-	yml := `webhooks:
+	yml := `openapi: 3.0
+webhooks:
       $ref: #bork`
 
 	info, _ := datamodel.ExtractSpecInfo([]byte(yml))
-	var err []error
-	_, err = CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{
-		AllowFileReferences:   false,
-		AllowRemoteReferences: false,
-	})
-	assert.Len(t, err, 1)
+	var err error
+	_, err = CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{})
+	assert.Len(t, utils.UnwrapErrors(err), 1)
 }
 
 func TestCreateDocument_Servers(t *testing.T) {
@@ -304,7 +385,6 @@ func TestCreateDocument_Tags(t *testing.T) {
 			// this is why we will need a higher level API to this model, this looks cool and all, but dude.
 			assert.Equal(t, "now?", extension.Value.(map[string]interface{})["ok"].([]interface{})[0].(map[string]interface{})["what"])
 		}
-
 	}
 
 	/// tag2
@@ -314,7 +394,6 @@ func TestCreateDocument_Tags(t *testing.T) {
 	assert.Equal(t, "https://pb33f.io", doc.Tags.Value[1].Value.ExternalDocs.Value.URL.Value)
 	assert.NotEmpty(t, doc.Tags.Value[1].Value.ExternalDocs.Value.URL.Value)
 	assert.Len(t, doc.Tags.Value[1].Value.Extensions, 0)
-
 }
 
 func TestCreateDocument_Paths(t *testing.T) {
@@ -439,7 +518,6 @@ func TestCreateDocument_Paths(t *testing.T) {
 	assert.NotNil(t, servers)
 	assert.Len(t, servers, 1)
 	assert.Equal(t, "https://pb33f.io", servers[0].Value.URL.Value)
-
 }
 
 func TestCreateDocument_Components_Schemas(t *testing.T) {
@@ -465,7 +543,6 @@ func TestCreateDocument_Components_Schemas(t *testing.T) {
 	p := fries.Value.Schema().FindProperty("favoriteDrink")
 	assert.Equal(t, "a frosty cold beverage can be coke or sprite",
 		p.Value.Schema().Description.Value)
-
 }
 
 func TestCreateDocument_Components_SecuritySchemes(t *testing.T) {
@@ -494,7 +571,6 @@ func TestCreateDocument_Components_SecuritySchemes(t *testing.T) {
 	readScope = oAuth.Flows.Value.AuthorizationCode.Value.FindScope("write:burgers")
 	assert.NotNil(t, readScope)
 	assert.Equal(t, "modify burgers and stuff", readScope.Value)
-
 }
 
 func TestCreateDocument_Components_Responses(t *testing.T) {
@@ -507,7 +583,6 @@ func TestCreateDocument_Components_Responses(t *testing.T) {
 	assert.NotNil(t, dressingResponse.Value)
 	assert.Equal(t, "all the dressings for a burger.", dressingResponse.Value.Description.Value)
 	assert.Len(t, dressingResponse.Value.Content.Value, 1)
-
 }
 
 func TestCreateDocument_Components_Examples(t *testing.T) {
@@ -594,7 +669,6 @@ func TestCreateDocument_Component_Discriminator(t *testing.T) {
 	assert.Nil(t, dsc.FindMappingValue("don't exist"))
 	assert.NotNil(t, doc.GetExternalDocs())
 	assert.Nil(t, doc.FindSecurityRequirement("scooby doo"))
-
 }
 
 func TestCreateDocument_CheckAdditionalProperties_Schema(t *testing.T) {
@@ -602,11 +676,8 @@ func TestCreateDocument_CheckAdditionalProperties_Schema(t *testing.T) {
 	components := doc.Components.Value
 	d := components.FindSchema("Dressing")
 	assert.NotNil(t, d.Value.Schema().AdditionalProperties.Value)
-	if n, ok := d.Value.Schema().AdditionalProperties.Value.(*base.SchemaProxy); ok {
-		assert.Equal(t, "something in here.", n.Schema().Description.Value)
-	} else {
-		assert.Fail(t, "should be a schema")
-	}
+
+	assert.True(t, d.Value.Schema().AdditionalProperties.Value.IsA(), "should be a schema")
 }
 
 func TestCreateDocument_CheckAdditionalProperties_Bool(t *testing.T) {
@@ -614,7 +685,7 @@ func TestCreateDocument_CheckAdditionalProperties_Bool(t *testing.T) {
 	components := doc.Components.Value
 	d := components.FindSchema("Drink")
 	assert.NotNil(t, d.Value.Schema().AdditionalProperties.Value)
-	assert.True(t, d.Value.Schema().AdditionalProperties.Value.(bool))
+	assert.True(t, d.Value.Schema().AdditionalProperties.Value.B)
 }
 
 func TestCreateDocument_Components_Error(t *testing.T) {
@@ -627,12 +698,9 @@ components:
           $ref: #bork`
 
 	info, _ := datamodel.ExtractSpecInfo([]byte(yml))
-	var err []error
-	doc, err = CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{
-		AllowFileReferences:   false,
-		AllowRemoteReferences: false,
-	})
-	assert.Len(t, err, 0)
+	var err error
+	doc, err = CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{})
+	assert.NoError(t, err)
 
 	ob := doc.Components.Value.FindSchema("bork").Value
 	ob.Schema()
@@ -646,12 +714,10 @@ webhooks:
     $ref: #bork`
 
 	info, _ := datamodel.ExtractSpecInfo([]byte(yml))
-	var err []error
-	doc, err = CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{
-		AllowFileReferences:   false,
-		AllowRemoteReferences: false,
-	})
-	assert.Len(t, err, 1)
+	var err error
+	doc, err = CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{})
+	assert.Equal(t, "flat map build failed: reference cannot be found: reference at line 4, column 5 is empty, it cannot be resolved",
+		err.Error())
 }
 
 func TestCreateDocument_Components_Error_Extract(t *testing.T) {
@@ -662,13 +728,9 @@ components:
       $ref: #bork`
 
 	info, _ := datamodel.ExtractSpecInfo([]byte(yml))
-	var err []error
-	_, err = CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{
-		AllowFileReferences:   false,
-		AllowRemoteReferences: false,
-	})
-	assert.Len(t, err, 1)
-
+	var err error
+	_, err = CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{})
+	assert.Equal(t, "reference at line 5, column 7 is empty, it cannot be resolved", err.Error())
 }
 
 func TestCreateDocument_Paths_Errors(t *testing.T) {
@@ -678,12 +740,10 @@ paths:
     $ref: #bork`
 
 	info, _ := datamodel.ExtractSpecInfo([]byte(yml))
-	var err []error
-	_, err = CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{
-		AllowFileReferences:   false,
-		AllowRemoteReferences: false,
-	})
-	assert.Len(t, err, 1)
+	var err error
+	_, err = CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{})
+	assert.Equal(t,
+		"path item build failed: cannot find reference:  at line 4, col 10", err.Error())
 }
 
 func TestCreateDocument_Tags_Errors(t *testing.T) {
@@ -692,12 +752,10 @@ tags:
   - $ref: #bork`
 
 	info, _ := datamodel.ExtractSpecInfo([]byte(yml))
-	var err []error
-	_, err = CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{
-		AllowFileReferences:   false,
-		AllowRemoteReferences: false,
-	})
-	assert.Len(t, err, 1)
+	var err error
+	_, err = CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{})
+	assert.Equal(t,
+		"object extraction failed: reference at line 3, column 5 is empty, it cannot be resolved", err.Error())
 }
 
 func TestCreateDocument_Security_Error(t *testing.T) {
@@ -706,12 +764,11 @@ security:
   $ref: #bork`
 
 	info, _ := datamodel.ExtractSpecInfo([]byte(yml))
-	var err []error
-	_, err = CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{
-		AllowFileReferences:   false,
-		AllowRemoteReferences: false,
-	})
-	assert.Len(t, err, 1)
+	var err error
+	_, err = CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{})
+	assert.Equal(t,
+		"array build failed: reference cannot be found: reference at line 3, column 3 is empty, it cannot be resolved",
+		err.Error())
 }
 
 func TestCreateDocument_ExternalDoc_Error(t *testing.T) {
@@ -720,12 +777,9 @@ externalDocs:
   $ref: #bork`
 
 	info, _ := datamodel.ExtractSpecInfo([]byte(yml))
-	var err []error
-	_, err = CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{
-		AllowFileReferences:   false,
-		AllowRemoteReferences: false,
-	})
-	assert.Len(t, err, 1)
+	var err error
+	_, err = CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{})
+	assert.Equal(t, "object extraction failed: reference at line 3, column 3 is empty, it cannot be resolved", err.Error())
 }
 
 func TestCreateDocument_YamlAnchor(t *testing.T) {
@@ -736,16 +790,10 @@ func TestCreateDocument_YamlAnchor(t *testing.T) {
 	info, _ := datamodel.ExtractSpecInfo(anchorDocument)
 
 	// build low-level document model
-	document, errors := CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{
-		AllowFileReferences:   false,
-		AllowRemoteReferences: false,
-	})
+	document, err := CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{})
 
-	// if something went wrong, a slice of errors is returned
-	if len(errors) > 0 {
-		for i := range errors {
-			fmt.Printf("error: %s\n", errors[i].Error())
-		}
+	if err != nil {
+		fmt.Printf("error: %s\n", err.Error())
 		panic("cannot build document")
 	}
 
@@ -777,8 +825,19 @@ func TestCreateDocument_YamlAnchor(t *testing.T) {
 	assert.NotNil(t, jsonGet)
 
 	// Should this work? It doesn't
-	//postJsonType := examplePath.GetValue().Post.GetValue().RequestBody.GetValue().FindContent("application/json")
-	//assert.NotNil(t, postJsonType)
+	// update from quobix 10/14/2023: It does now!
+	postJsonType := examplePath.GetValue().Post.GetValue().RequestBody.GetValue().FindContent("application/json")
+	assert.NotNil(t, postJsonType)
+}
+
+func TestCreateDocument_NotOpenAPI_EnforcedDocCheck(t *testing.T) {
+	yml := `notadoc: no`
+
+	info, _ := datamodel.ExtractSpecInfo([]byte(yml))
+	var err error
+	_, err = CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{})
+	assert.Equal(t,
+		"no openapi version/tag found, cannot create document", err.Error())
 }
 
 func ExampleCreateDocument() {
@@ -791,16 +850,10 @@ func ExampleCreateDocument() {
 	info, _ := datamodel.ExtractSpecInfo(petstoreBytes)
 
 	// build low-level document model
-	document, errors := CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{
-		AllowFileReferences:   false,
-		AllowRemoteReferences: false,
-	})
+	document, err := CreateDocumentFromConfig(info, &datamodel.DocumentConfiguration{})
 
-	// if something went wrong, a slice of errors is returned
-	if len(errors) > 0 {
-		for i := range errors {
-			fmt.Printf("error: %s\n", errors[i].Error())
-		}
+	if err != nil {
+		fmt.Printf("error: %s\n", err.Error())
 		panic("cannot build document")
 	}