forked from goadesign/goa
/
test_generator.go
463 lines (429 loc) · 16.4 KB
/
test_generator.go
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package genapp
import (
"fmt"
"net/http"
"os"
"path/filepath"
"sort"
"strconv"
"strings"
"text/template"
"github.com/goadesign/goa/design"
"github.com/goadesign/goa/goagen/codegen"
)
func makeTestDir(g *Generator, apiName string) (outDir string, err error) {
outDir = filepath.Join(g.OutDir, "test")
if err = os.RemoveAll(outDir); err != nil {
return
}
if err = os.MkdirAll(outDir, 0755); err != nil {
return
}
g.genfiles = append(g.genfiles, outDir)
return
}
// TestMethod structure
type TestMethod struct {
Name string
Comment string
ResourceName string
ActionName string
ControllerName string
ContextVarName string
ContextType string
RouteVerb string
FullPath string
Status int
ReturnType *ObjectType
ReturnsErrorMedia bool
Params []*ObjectType
QueryParams []*ObjectType
Headers []*ObjectType
Payload *ObjectType
reservedNames map[string]bool
}
// Escape escapes given string.
func (t *TestMethod) Escape(s string) string {
if ok := t.reservedNames[s]; ok {
s = t.Escape("_" + s)
}
t.reservedNames[s] = true
return s
}
// ObjectType structure
type ObjectType struct {
Label string
Name string
Type string
Pointer string
Validatable bool
}
func (g *Generator) generateResourceTest() error {
if len(g.API.Resources) == 0 {
return nil
}
funcs := template.FuncMap{
"isSlice": isSlice,
}
testTmpl := template.Must(template.New("test").Funcs(funcs).Parse(testTmpl))
outDir, err := makeTestDir(g, g.API.Name)
if err != nil {
return err
}
appPkg, err := codegen.PackagePath(g.OutDir)
if err != nil {
return err
}
imports := []*codegen.ImportSpec{
codegen.SimpleImport("bytes"),
codegen.SimpleImport("fmt"),
codegen.SimpleImport("io"),
codegen.SimpleImport("log"),
codegen.SimpleImport("net/http"),
codegen.SimpleImport("net/http/httptest"),
codegen.SimpleImport("net/url"),
codegen.SimpleImport("strconv"),
codegen.SimpleImport("strings"),
codegen.SimpleImport("time"),
codegen.SimpleImport(appPkg),
codegen.SimpleImport("github.com/goadesign/goa"),
codegen.SimpleImport("github.com/goadesign/goa/goatest"),
codegen.SimpleImport("context"),
codegen.NewImport("uuid", "github.com/satori/go.uuid"),
}
return g.API.IterateResources(func(res *design.ResourceDefinition) (err error) {
filename := filepath.Join(outDir, codegen.SnakeCase(res.Name)+"_testing.go")
var file *codegen.SourceFile
file, err = codegen.SourceFileFor(filename)
if err != nil {
return err
}
defer func() {
file.Close()
if err == nil {
err = file.FormatCode()
}
}()
title := fmt.Sprintf("%s: %s TestHelpers", g.API.Context(), res.Name)
if err = file.WriteHeader(title, "test", imports); err != nil {
return err
}
var methods []*TestMethod
if err = res.IterateActions(func(action *design.ActionDefinition) error {
if err := action.IterateResponses(func(response *design.ResponseDefinition) error {
if response.Status == 101 { // SwitchingProtocols, Don't currently handle WebSocket endpoints
return nil
}
for routeIndex, route := range action.Routes {
mediaType := design.Design.MediaTypeWithIdentifier(response.MediaType)
if mediaType == nil {
methods = append(methods, g.createTestMethod(res, action, response, route, routeIndex, nil, nil))
} else {
if err := mediaType.IterateViews(func(view *design.ViewDefinition) error {
methods = append(methods, g.createTestMethod(res, action, response, route, routeIndex, mediaType, view))
return nil
}); err != nil {
return err
}
}
}
return nil
}); err != nil {
return err
}
return nil
}); err != nil {
return err
}
g.genfiles = append(g.genfiles, filename)
err = testTmpl.Execute(file, methods)
return
})
}
func (g *Generator) createTestMethod(resource *design.ResourceDefinition, action *design.ActionDefinition,
response *design.ResponseDefinition, route *design.RouteDefinition, routeIndex int,
mediaType *design.MediaTypeDefinition, view *design.ViewDefinition) *TestMethod {
var (
actionName, ctrlName, varName string
routeQualifier, viewQualifier, respQualifier string
comment string
path []*ObjectType
query []*ObjectType
header []*ObjectType
returnType *ObjectType
payload *ObjectType
)
actionName = codegen.Goify(action.Name, true)
ctrlName = codegen.Goify(resource.Name, true)
varName = codegen.Goify(action.Name, false)
routeQualifier = suffixRoute(action.Routes, routeIndex)
if view != nil && view.Name != "default" {
viewQualifier = codegen.Goify(view.Name, true)
}
respQualifier = codegen.Goify(response.Name, true)
hasReturnValue := view != nil && mediaType != nil
if hasReturnValue {
p, _, err := mediaType.Project(view.Name)
if err != nil {
panic(err) // bug
}
tmp := codegen.GoTypeName(p, nil, 0, false)
if !p.IsError() {
tmp = fmt.Sprintf("%s.%s", g.Target, tmp)
}
validate := g.validator.Code(p.AttributeDefinition, false, false, false, "payload", "raw", 1, false)
returnType = &ObjectType{}
returnType.Type = tmp
if p.IsObject() && !p.IsError() {
returnType.Pointer = "*"
}
returnType.Validatable = validate != ""
}
comment = "runs the method " + actionName + " of the given controller with the given parameters"
if action.Payload != nil {
comment += " and payload"
}
comment += ".\n// It returns the response writer so it's possible to inspect the response headers"
if hasReturnValue {
comment += " and the media type struct written to the response"
}
comment += "."
path = pathParams(action, route)
query = queryParams(action)
header = headers(action, resource.Headers)
if action.Payload != nil {
payload = &ObjectType{}
payload.Name = "payload"
payload.Type = fmt.Sprintf("%s.%s", g.Target, codegen.Goify(action.Payload.TypeName, true))
if !action.Payload.IsPrimitive() && !action.Payload.IsArray() && !action.Payload.IsHash() {
payload.Pointer = "*"
}
validate := g.validator.Code(action.Payload.AttributeDefinition, false, false, false, "payload", "raw", 1, false)
if validate != "" {
payload.Validatable = true
}
}
return &TestMethod{
Name: fmt.Sprintf("%s%s%s%s%s", actionName, ctrlName, respQualifier, routeQualifier, viewQualifier),
ActionName: actionName,
ResourceName: ctrlName,
Comment: comment,
Params: path,
QueryParams: query,
Headers: header,
Payload: payload,
ReturnType: returnType,
ReturnsErrorMedia: mediaType == design.ErrorMedia,
ControllerName: fmt.Sprintf("%s.%sController", g.Target, ctrlName),
ContextVarName: fmt.Sprintf("%sCtx", varName),
ContextType: fmt.Sprintf("%s.New%s%sContext", g.Target, actionName, ctrlName),
RouteVerb: route.Verb,
Status: response.Status,
FullPath: goPathFormat(route.FullPath()),
reservedNames: reservedNames(path, query, header, payload, returnType),
}
}
// pathParams returns the path params for the given action and route.
func pathParams(action *design.ActionDefinition, route *design.RouteDefinition) []*ObjectType {
return paramFromNames(action, route.Params())
}
// headers builds the template data structure needed to proprely render the code
// for setting the headers for the given action.
func headers(action *design.ActionDefinition, headers *design.AttributeDefinition) []*ObjectType {
hds := &design.AttributeDefinition{
Type: design.Object{},
}
if headers != nil {
hds.Merge(headers)
hds.Validation = headers.Validation
}
if action.Headers != nil {
hds.Merge(action.Headers)
hds.Validation = action.Headers.Validation
}
if hds == nil {
return nil
}
var headrs []string
for header := range hds.Type.ToObject() {
headrs = append(headrs, header)
}
sort.Strings(headrs)
objs := make([]*ObjectType, len(headrs))
for i, name := range headrs {
objs[i] = attToObject(name, hds, hds.Type.ToObject()[name])
objs[i].Label = http.CanonicalHeaderKey(objs[i].Label)
}
return objs
}
// queryParams returns the query string params for the given action.
func queryParams(action *design.ActionDefinition) []*ObjectType {
var qparams []string
if qps := action.QueryParams; qps != nil {
for pname := range qps.Type.ToObject() {
qparams = append(qparams, pname)
}
}
sort.Strings(qparams)
return paramFromNames(action, qparams)
}
func paramFromNames(action *design.ActionDefinition, names []string) (params []*ObjectType) {
obj := action.Params.Type.ToObject()
for _, name := range names {
params = append(params, attToObject(name, action.Params, obj[name]))
}
return
}
func reservedNames(params, queryParams, headers []*ObjectType, payload, returnType *ObjectType) map[string]bool {
var names = make(map[string]bool)
for _, param := range params {
names[param.Name] = true
}
for _, param := range queryParams {
names[param.Name] = true
}
for _, header := range headers {
names[header.Name] = true
}
if payload != nil {
names[payload.Name] = true
}
if returnType != nil {
names[returnType.Name] = true
}
return names
}
func attToObject(name string, parent, att *design.AttributeDefinition) *ObjectType {
obj := &ObjectType{}
obj.Label = name
obj.Name = codegen.Goify(name, false)
obj.Type = codegen.GoTypeRef(att.Type, nil, 0, false)
if att.Type.IsPrimitive() && parent.IsPrimitivePointer(name) {
obj.Pointer = "*"
}
return obj
}
func goPathFormat(path string) string {
return design.WildcardRegex.ReplaceAllLiteralString(path, "/%v")
}
func suffixRoute(routes []*design.RouteDefinition, currIndex int) string {
if len(routes) > 1 && currIndex > 0 {
return strconv.Itoa(currIndex)
}
return ""
}
func isSlice(typeName string) bool {
return strings.HasPrefix(typeName, "[]")
}
var convertParamTmpl = `{{ if eq .Type "string" }} sliceVal := []string{ {{ if .Pointer }}*{{ end }}{{ .Name }}}{{/*
*/}}{{ else if eq .Type "int" }} sliceVal := []string{strconv.Itoa({{ if .Pointer }}*{{ end }}{{ .Name }})}{{/*
*/}}{{ else if eq .Type "[]string" }} sliceVal := {{ .Name }}{{/*
*/}}{{ else if (isSlice .Type) }} sliceVal := make([]string, len({{ .Name }}))
for i, v := range {{ .Name }} {
sliceVal[i] = fmt.Sprintf("%v", v)
}{{/*
*/}}{{ else if eq .Type "time.Time" }} sliceVal := []string{ {{ if .Pointer }}(*{{ end }}{{ .Name }}{{ if .Pointer }}){{ end }}.Format(time.RFC3339)}{{/*
*/}}{{ else }} sliceVal := []string{fmt.Sprintf("%v", {{ if .Pointer }}*{{ end }}{{ .Name }})}{{ end }}`
var testTmpl = `{{ define "convertParam" }}` + convertParamTmpl + `{{ end }}` + `
{{ range $test := . }}
// {{ $test.Name }} {{ $test.Comment }}
// If ctx is nil then context.Background() is used.
// If service is nil then a default service is created.
func {{ $test.Name }}(t goatest.TInterface, ctx context.Context, service *goa.Service, ctrl {{ $test.ControllerName}}{{/*
*/}}{{ range $param := $test.Params }}, {{ $param.Name }} {{ $param.Pointer }}{{ $param.Type }}{{ end }}{{/*
*/}}{{ range $param := $test.QueryParams }}, {{ $param.Name }} {{ $param.Pointer }}{{ $param.Type }}{{ end }}{{/*
*/}}{{ range $header := $test.Headers }}, {{ $header.Name }} {{ $header.Pointer }}{{ $header.Type }}{{ end }}{{/*
*/}}{{ if $test.Payload }}, {{ $test.Payload.Name }} {{ $test.Payload.Pointer }}{{ $test.Payload.Type }}{{ end }}){{/*
*/}} (http.ResponseWriter{{ if $test.ReturnType }}, {{ $test.ReturnType.Pointer }}{{ $test.ReturnType.Type }}{{ end }}) {
// Setup service
var (
{{ $logBuf := $test.Escape "logBuf" }}{{ $logBuf }} bytes.Buffer
{{ $resp := $test.Escape "resp" }}{{ if $test.ReturnType }}{{ $resp }} interface{}{{ end }}
{{ $respSetter := $test.Escape "respSetter" }}{{ $respSetter }} goatest.ResponseSetterFunc = func(r interface{}) { {{ if $test.ReturnType }}{{ $resp }} = r{{ end }} }
)
if service == nil {
service = goatest.Service(&{{ $logBuf }}, {{ $respSetter }})
} else {
{{ $logger := $test.Escape "logger" }}{{ $logger }} := log.New(&{{ $logBuf }}, "", log.Ltime)
service.WithLogger(goa.NewLogger({{ $logger }}))
{{ $newEncoder := $test.Escape "newEncoder" }}{{ $newEncoder }} := func(io.Writer) goa.Encoder { return {{ $respSetter }} }
service.Encoder = goa.NewHTTPEncoder() // Make sure the code ends up using this decoder
service.Encoder.Register({{ $newEncoder }}, "*/*")
}
{{ if $test.Payload }}{{ if $test.Payload.Validatable }}
// Validate payload
{{ $err := $test.Escape "err" }}{{ $err }} := {{ $test.Payload.Name }}.Validate()
if {{ $err }} != nil {
{{ $e := $test.Escape "e" }}{{ $e }}, {{ $ok := $test.Escape "ok" }}{{ $ok }} := {{ $err }}.(goa.ServiceError)
if !{{ $ok }} {
panic({{ $err }}) // bug
}
{{ if not $test.ReturnsErrorMedia }} t.Errorf("unexpected payload validation error: %+v", {{ $e }})
{{ end }}{{ if $test.ReturnType }} return nil, {{ if $test.ReturnsErrorMedia }}{{ $e }}{{ else }}nil{{ end }}{{ else }}return nil{{ end }}
}
{{ end }}{{ end }}
// Setup request context
{{ $rw := $test.Escape "rw" }}{{ $rw }} := httptest.NewRecorder()
{{ $query := $test.Escape "query" }}{{ if $test.QueryParams}} {{ $query }} := url.Values{}
{{ range $param := $test.QueryParams }}{{ if $param.Pointer }} if {{ $param.Name }} != nil {{ end }}{
{{ template "convertParam" $param }}
{{ $query }}[{{ printf "%q" $param.Label }}] = sliceVal
}
{{ end }}{{ end }} {{ $u := $test.Escape "u" }}{{ $u }}:= &url.URL{
Path: fmt.Sprintf({{ printf "%q" $test.FullPath }}{{ range $param := $test.Params }}, {{ $param.Name }}{{ end }}),
{{ if $test.QueryParams }} RawQuery: {{ $query }}.Encode(),
{{ end }} }
{{ $req := $test.Escape "req" }}{{ $req }}, {{ $err := $test.Escape "err" }}{{ $err }}:= http.NewRequest("{{ $test.RouteVerb }}", {{ $u }}.String(), nil)
if {{ $err }} != nil {
panic("invalid test " + {{ $err }}.Error()) // bug
}
{{ range $header := $test.Headers }}{{ if $header.Pointer }} if {{ $header.Name }} != nil {{ end }}{
{{ template "convertParam" $header }}
{{ $req }}.Header[{{ printf "%q" $header.Label }}] = sliceVal
}
{{ end }} {{ $prms := $test.Escape "prms" }}{{ $prms }} := url.Values{}
{{ range $param := $test.Params }} {{ $prms }}["{{ $param.Label }}"] = []string{fmt.Sprintf("%v",{{ $param.Name}})}
{{ end }}{{ range $param := $test.QueryParams }}{{ if $param.Pointer }} if {{ $param.Name }} != nil {{ end }} {
{{ template "convertParam" $param }}
{{ $prms }}[{{ printf "%q" $param.Label }}] = sliceVal
}
{{ end }} if ctx == nil {
ctx = context.Background()
}
{{ $goaCtx := $test.Escape "goaCtx" }}{{ $goaCtx }} := goa.NewContext(goa.WithAction(ctx, "{{ $test.ResourceName }}Test"), {{ $rw }}, {{ $req }}, {{ $prms }})
{{ $test.ContextVarName }}, {{ $err := $test.Escape "err" }}{{ $err }} := {{ $test.ContextType }}({{ $goaCtx }}, {{ $req }}, service)
if {{ $err }} != nil {
{{ $e := $test.Escape "e" }}{{ $e }}, {{ $ok := $test.Escape "ok" }}{{ $ok }} := {{ $err }}.(goa.ServiceError)
if !{{ $ok }} {
panic("invalid test data " + {{ $err }}.Error()) // bug
}
{{ if not $test.ReturnsErrorMedia }} t.Errorf("unexpected parameter validation error: %+v", {{ $e }})
{{ end }}{{ if $test.ReturnType }} return nil, {{ if $test.ReturnsErrorMedia }}{{ $e }}{{ else }}nil{{ end }}{{ else }}return nil{{ end }}
}
{{ if $test.Payload }}{{ $test.ContextVarName }}.Payload = {{ $test.Payload.Name }}{{ end }}
// Perform action
{{ $err }} = ctrl.{{ $test.ActionName}}({{ $test.ContextVarName }})
// Validate response
if {{ $err }} != nil {
t.Fatalf("controller returned %+v, logs:\n%s", {{ $err }}, {{ $logBuf }}.String())
}
if {{ $rw }}.Code != {{ $test.Status }} {
t.Errorf("invalid response status code: got %+v, expected {{ $test.Status }}", {{ $rw }}.Code)
}
{{ if $test.ReturnType }} var mt {{ $test.ReturnType.Pointer }}{{ $test.ReturnType.Type }}
if {{ $resp }} != nil {
var {{ $ok := $test.Escape "ok" }}{{ $ok }} bool
mt, {{ $ok }} = {{ $resp }}.({{ $test.ReturnType.Pointer }}{{ $test.ReturnType.Type }})
if !{{ $ok }} {
t.Fatalf("invalid response media: got variable of type %T, value %+v, expected instance of {{ $test.ReturnType.Type }}", {{ $resp }}, {{ $resp }})
}
{{ if $test.ReturnType.Validatable }} {{ $err }} = mt.Validate()
if {{ $err }} != nil {
t.Errorf("invalid response media type: %s", {{ $err }})
}
{{ end }} }
{{ end }}
// Return results
return {{ $rw }}{{ if $test.ReturnType }}, mt{{ end }}
}
{{ end }}`