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package codegen
import (
"bytes"
_ "embed"
"fmt"
"go/format"
"io"
"net"
"net/http"
"testing"
examplePetstoreClient "github.com/deepmap/oapi-codegen/examples/petstore-expanded"
examplePetstore "github.com/deepmap/oapi-codegen/examples/petstore-expanded/echo/api"
"github.com/deepmap/oapi-codegen/pkg/util"
"github.com/getkin/kin-openapi/openapi3"
"github.com/golangci/lint-1"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
const (
remoteRefFile = `https://raw.githubusercontent.com/deepmap/oapi-codegen/master/examples/petstore-expanded` +
`/petstore-expanded.yaml`
remoteRefImport = `github.com/deepmap/oapi-codegen/examples/petstore-expanded`
)
func checkLint(t *testing.T, filename string, code []byte) {
linter := new(lint.Linter)
problems, err := linter.Lint(filename, code)
assert.NoError(t, err)
assert.Len(t, problems, 0)
}
func TestExamplePetStoreCodeGeneration(t *testing.T) {
// Input vars for code generation:
packageName := "api"
opts := Configuration{
PackageName: packageName,
Generate: GenerateOptions{
EchoServer: true,
Client: true,
Models: true,
EmbeddedSpec: true,
},
}
// Get a spec from the example PetStore definition:
swagger, err := examplePetstore.GetSwagger()
assert.NoError(t, err)
// Run our code generation:
code, err := Generate(swagger, opts)
assert.NoError(t, err)
assert.NotEmpty(t, code)
// Check that we have valid (formattable) code:
_, err = format.Source([]byte(code))
assert.NoError(t, err)
// Check that we have a package:
assert.Contains(t, code, "package api")
// Check that the client method signatures return response structs:
assert.Contains(t, code, "func (c *Client) FindPetByID(ctx context.Context, id int64, reqEditors ...RequestEditorFn) (*http.Response, error) {")
// Check that the property comments were generated
assert.Contains(t, code, "// Id Unique id of the pet")
// Check that the summary comment contains newlines
assert.Contains(t, code, `// Deletes a pet by ID
// (DELETE /pets/{id})
`)
// Make sure the generated code is valid:
checkLint(t, "test.gen.go", []byte(code))
}
func TestExamplePetStoreCodeGenerationWithUserTemplates(t *testing.T) {
userTemplates := map[string]string{"typedef.tmpl": "//blah\n//blah"}
// Input vars for code generation:
packageName := "api"
opts := Configuration{
PackageName: packageName,
Generate: GenerateOptions{
Models: true,
},
OutputOptions: OutputOptions{
UserTemplates: userTemplates,
},
}
// Get a spec from the example PetStore definition:
swagger, err := examplePetstore.GetSwagger()
assert.NoError(t, err)
// Run our code generation:
code, err := Generate(swagger, opts)
assert.NoError(t, err)
assert.NotEmpty(t, code)
// Check that we have valid (formattable) code:
_, err = format.Source([]byte(code))
assert.NoError(t, err)
// Check that we have a package:
assert.Contains(t, code, "package api")
// Check that the built-in template has been overridden
assert.Contains(t, code, "//blah")
}
func TestExamplePetStoreCodeGenerationWithFileUserTemplates(t *testing.T) {
userTemplates := map[string]string{"typedef.tmpl": "./templates/typedef.tmpl"}
// Input vars for code generation:
packageName := "api"
opts := Configuration{
PackageName: packageName,
Generate: GenerateOptions{
Models: true,
},
OutputOptions: OutputOptions{
UserTemplates: userTemplates,
},
}
// Get a spec from the example PetStore definition:
swagger, err := examplePetstore.GetSwagger()
assert.NoError(t, err)
// Run our code generation:
code, err := Generate(swagger, opts)
assert.NoError(t, err)
assert.NotEmpty(t, code)
// Check that we have valid (formattable) code:
_, err = format.Source([]byte(code))
assert.NoError(t, err)
// Check that we have a package:
assert.Contains(t, code, "package api")
// Check that the built-in template has been overridden
assert.Contains(t, code, "// Package api provides primitives to interact with the openapi")
}
func TestExamplePetStoreCodeGenerationWithHTTPUserTemplates(t *testing.T) {
ln, err := net.Listen("tcp", "127.0.0.1:0")
assert.NoError(t, err)
defer ln.Close()
//nolint:errcheck
//Does not matter if the server returns an error on close etc.
go http.Serve(ln, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
_, writeErr := w.Write([]byte("//blah"))
assert.NoError(t, writeErr)
}))
t.Logf("Listening on %s", ln.Addr().String())
userTemplates := map[string]string{"typedef.tmpl": fmt.Sprintf("http://%s", ln.Addr().String())}
// Input vars for code generation:
packageName := "api"
opts := Configuration{
PackageName: packageName,
Generate: GenerateOptions{
Models: true,
},
OutputOptions: OutputOptions{
UserTemplates: userTemplates,
},
}
// Get a spec from the example PetStore definition:
swagger, err := examplePetstore.GetSwagger()
assert.NoError(t, err)
// Run our code generation:
code, err := Generate(swagger, opts)
assert.NoError(t, err)
assert.NotEmpty(t, code)
// Check that we have valid (formattable) code:
_, err = format.Source([]byte(code))
assert.NoError(t, err)
// Check that we have a package:
assert.Contains(t, code, "package api")
// Check that the built-in template has been overridden
assert.Contains(t, code, "//blah")
}
func TestExamplePetStoreParseFunction(t *testing.T) {
bodyBytes := []byte(`{"id": 5, "name": "testpet", "tag": "cat"}`)
cannedResponse := &http.Response{
StatusCode: 200,
Body: io.NopCloser(bytes.NewReader(bodyBytes)),
Header: http.Header{},
}
cannedResponse.Header.Add("Content-type", "application/json")
findPetByIDResponse, err := examplePetstoreClient.ParseFindPetByIDResponse(cannedResponse)
assert.NoError(t, err)
assert.NotNil(t, findPetByIDResponse.JSON200)
assert.Equal(t, int64(5), findPetByIDResponse.JSON200.Id)
assert.Equal(t, "testpet", findPetByIDResponse.JSON200.Name)
assert.NotNil(t, findPetByIDResponse.JSON200.Tag)
assert.Equal(t, "cat", *findPetByIDResponse.JSON200.Tag)
}
func TestExampleOpenAPICodeGeneration(t *testing.T) {
// Input vars for code generation:
packageName := "testswagger"
opts := Configuration{
PackageName: packageName,
Generate: GenerateOptions{
EchoServer: true,
Client: true,
Models: true,
EmbeddedSpec: true,
},
}
loader := openapi3.NewLoader()
loader.IsExternalRefsAllowed = true
// Get a spec from the test definition in this file:
swagger, err := loader.LoadFromData([]byte(testOpenAPIDefinition))
assert.NoError(t, err)
// Run our code generation:
code, err := Generate(swagger, opts)
assert.NoError(t, err)
assert.NotEmpty(t, code)
// Check that we have valid (formattable) code:
_, err = format.Source([]byte(code))
assert.NoError(t, err)
// Check that we have a package:
assert.Contains(t, code, "package testswagger")
// Check that response structs are generated correctly:
assert.Contains(t, code, "type GetTestByNameResponse struct {")
// Check that response structs contains fallbacks to interface for invalid types:
// Here an invalid array with no items.
assert.Contains(t, code, `
type GetTestByNameResponse struct {
Body []byte
HTTPResponse *http.Response
JSON200 *[]Test
XML200 *[]Test
JSON422 *[]interface{}
XML422 *[]interface{}
JSONDefault *Error
}`)
// Check that the helper methods are generated correctly:
assert.Contains(t, code, "func (r GetTestByNameResponse) Status() string {")
assert.Contains(t, code, "func (r GetTestByNameResponse) StatusCode() int {")
assert.Contains(t, code, "func ParseGetTestByNameResponse(rsp *http.Response) (*GetTestByNameResponse, error) {")
// Check the client method signatures:
assert.Contains(t, code, "type GetTestByNameParams struct {")
assert.Contains(t, code, "Top *int `form:\"$top,omitempty\" json:\"$top,omitempty\"`")
assert.Contains(t, code, "func (c *Client) GetTestByName(ctx context.Context, name string, params *GetTestByNameParams, reqEditors ...RequestEditorFn) (*http.Response, error) {")
assert.Contains(t, code, "func (c *ClientWithResponses) GetTestByNameWithResponse(ctx context.Context, name string, params *GetTestByNameParams, reqEditors ...RequestEditorFn) (*GetTestByNameResponse, error) {")
assert.Contains(t, code, "DeadSince *time.Time `json:\"dead_since,omitempty\" tag1:\"value1\" tag2:\"value2\"`")
assert.Contains(t, code, "type EnumTestNumerics int")
assert.Contains(t, code, "N2 EnumTestNumerics = 2")
assert.Contains(t, code, "type EnumTestEnumNames int")
assert.Contains(t, code, "Two EnumTestEnumNames = 2")
assert.Contains(t, code, "Double EnumTestEnumVarnames = 2")
// Make sure the generated code is valid:
checkLint(t, "test.gen.go", []byte(code))
}
func TestGoTypeImport(t *testing.T) {
packageName := "api"
opts := Configuration{
PackageName: packageName,
Generate: GenerateOptions{
EchoServer: true,
Models: true,
EmbeddedSpec: true,
},
}
spec := "test_specs/x-go-type-import-pet.yaml"
swagger, err := util.LoadSwagger(spec)
require.NoError(t, err)
// Run our code generation:
code, err := Generate(swagger, opts)
assert.NoError(t, err)
assert.NotEmpty(t, code)
// Check that we have valid (formattable) code:
_, err = format.Source([]byte(code))
assert.NoError(t, err)
imports := []string{
`github.com/CavernaTechnologies/pgext`, // schemas - direct object
`myuuid "github.com/google/uuid"`, // schemas - object
`github.com/lib/pq`, // schemas - array
`github.com/spf13/viper`, // responses - direct object
`golang.org/x/text`, // responses - complex object
`golang.org/x/email`, // requestBodies - in components
`github.com/fatih/color`, // parameters - query
`github.com/go-openapi/swag`, // parameters - path
`github.com/jackc/pgtype`, // direct parameters - path
`github.com/mailru/easyjson`, // direct parameters - query
`github.com/subosito/gotenv`, // direct request body
}
// Check import
for _, imp := range imports {
assert.Contains(t, code, imp)
}
// Make sure the generated code is valid:
checkLint(t, "test.gen.go", []byte(code))
}
func TestRemoteExternalReference(t *testing.T) {
packageName := "api"
opts := Configuration{
PackageName: packageName,
Generate: GenerateOptions{
Models: true,
},
ImportMapping: map[string]string{
remoteRefFile: remoteRefImport,
},
}
spec := "test_specs/remote-external-reference.yaml"
swagger, err := util.LoadSwagger(spec)
require.NoError(t, err)
// Run our code generation:
code, err := Generate(swagger, opts)
assert.NoError(t, err)
assert.NotEmpty(t, code)
// Check that we have valid (formattable) code:
_, err = format.Source([]byte(code))
assert.NoError(t, err)
// Check that we have a package:
assert.Contains(t, code, "package api")
// Check import
assert.Contains(t, code, `externalRef0 "github.com/deepmap/oapi-codegen/examples/petstore-expanded"`)
// Check generated oneOf structure:
assert.Contains(t, code, `
// ExampleSchema_Item defines model for ExampleSchema.Item.
type ExampleSchema_Item struct {
union json.RawMessage
}
`)
// Check generated oneOf structure As method:
assert.Contains(t, code, `
// AsExternalRef0NewPet returns the union data inside the ExampleSchema_Item as a externalRef0.NewPet
func (t ExampleSchema_Item) AsExternalRef0NewPet() (externalRef0.NewPet, error) {
`)
// Check generated oneOf structure From method:
assert.Contains(t, code, `
// FromExternalRef0NewPet overwrites any union data inside the ExampleSchema_Item as the provided externalRef0.NewPet
func (t *ExampleSchema_Item) FromExternalRef0NewPet(v externalRef0.NewPet) error {
`)
// Check generated oneOf structure Merge method:
assert.Contains(t, code, `
// FromExternalRef0NewPet overwrites any union data inside the ExampleSchema_Item as the provided externalRef0.NewPet
func (t *ExampleSchema_Item) FromExternalRef0NewPet(v externalRef0.NewPet) error {
`)
// Make sure the generated code is valid:
checkLint(t, "test.gen.go", []byte(code))
}
//go:embed test_spec.yaml
var testOpenAPIDefinition string