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helper_test.go
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helper_test.go
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package telegram_test
import (
"bytes"
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"net/url"
"os"
"path"
"strings"
"testing"
"github.com/62bot/telegram"
)
func TestMain(m *testing.M) {
// setup
baseDir := "testdata"
decodeTestCases := func(methodName, filePath string) testCaseStorage {
f, err := os.Open(filePath)
if err != nil {
panic(err)
}
defer f.Close()
var v map[string]testCase
if err := json.NewDecoder(f).Decode(&v); err != nil {
panic(err)
}
for caseName, tc := range v {
v[caseName] = testCase{
methodName: methodName,
caseName: caseName,
StatusCode: tc.StatusCode,
Params: tc.Params,
Body: tc.Body,
}
tc.caseName = caseName
}
return testCaseStorage{
methodName: methodName,
data: v,
}
}
fis, err := ioutil.ReadDir(baseDir)
if err != nil {
panic(err)
}
for _, fi := range fis {
var (
fileName = fi.Name()
ext = path.Ext(fileName)
methodName = strings.TrimSuffix(fileName, ext)
)
if ext != ".json" {
continue
}
testFixture[methodName] = decodeTestCases(methodName, path.Join(baseDir, fileName))
}
// pre-assign common testCase
testCases := testFixture.get("getMe")
unauthorizedCase = testCases.get("unauthorized")
authorizedCase = testCases.get("authorized")
// run the test
code := m.Run()
// cleanup
os.Exit(code)
}
var (
testFixture = make(testFixtureStorage)
unauthorizedCase testCase
authorizedCase testCase
validTestToken = "123456:valid-token"
invalidTestToken = "123456:invalid-token"
)
// testFixtureStorage format: map[{METHOD_NAME}]testCases.
type testFixtureStorage map[string]testCaseStorage
func (storage testFixtureStorage) get(methodName string) testCaseStorage {
testCases, ok := storage[methodName]
if !ok {
panic(fmt.Errorf("no test fixture for method %q", methodName))
}
return testCases
}
// testCaseStorage format: map[{CASE_NAME}]testCase.
type testCaseStorage struct {
methodName string
data map[string]testCase
}
func (storage *testCaseStorage) get(caseName string) testCase {
tc, ok := storage.data[caseName]
if !ok {
panic(fmt.Errorf("no test data for case %q in method %q", caseName, storage.methodName))
}
return tc
}
type testCase struct {
methodName string
caseName string
StatusCode int
Params url.Values
Body json.RawMessage
}
func (tc *testCase) UnmarshalJSON(b []byte) error {
type TC struct {
StatusCode int `json:"status_code"`
Params string `json:"params"`
Body json.RawMessage `json:"body"`
}
var temp TC
if err := json.Unmarshal(b, &temp); err != nil {
return err
}
params, err := url.ParseQuery(temp.Params)
if err != nil {
return err
}
tc.StatusCode = temp.StatusCode
tc.Params = params
tc.Body = temp.Body
return nil
}
func (tc *testCase) decodeResponse(v interface{}) {
var resp telegram.Response
if err := json.Unmarshal(tc.Body, &resp); err != nil {
panic(fmt.Errorf("%s/%s: %v", tc.methodName, tc.caseName, err))
}
if err := json.Unmarshal(resp.Result, v); err != nil {
panic(fmt.Errorf("%s/%s: %v", tc.methodName, tc.caseName, err))
}
}
type roundTripperTestFunc func(methodName string, params url.Values) *http.Response
func (f roundTripperTestFunc) RoundTrip(r *http.Request) (*http.Response, error) {
var (
urlPath = r.URL.Path
methodName = path.Base(urlPath)
params = r.URL.Query()
token = strings.TrimPrefix(strings.TrimSuffix(urlPath, "/"+methodName), "/bot")
)
if token != validTestToken {
return newHTTPResponse(unauthorizedCase.StatusCode, unauthorizedCase.Body), nil
}
if token == validTestToken && methodName == "getMe" {
return newHTTPResponse(authorizedCase.StatusCode, authorizedCase.Body), nil
}
return f(methodName, params), nil
}
// newTestClient returns an http client for test.
func newTestClient(fn roundTripperTestFunc) *http.Client {
return &http.Client{
Transport: fn,
}
}
// newResponse returns an http response with a specified status code
// and JSON encoded body from v.
func newHTTPResponse(statusCode int, v []byte) *http.Response {
return &http.Response{
StatusCode: statusCode,
Body: ioutil.NopCloser(bytes.NewReader(v)),
}
}