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ginlambda_test.go
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ginlambda_test.go
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package ginlambda_test
import (
"context"
"encoding/json"
"fmt"
"net/http"
"strings"
"testing"
"github.com/aws/aws-lambda-go/events"
"github.com/dgravesa/ginlambda"
"github.com/gin-gonic/gin"
)
func init() {
gin.SetMode(gin.ReleaseMode)
}
func unmarshalJSONString(t *testing.T, str string, v interface{}) {
err := json.Unmarshal([]byte(str), v)
if err != nil {
t.Error("error on unmarshal json:", err)
}
}
func Test_HandlerFunc_WithRouteParams_ReturnsExpectedResult(t *testing.T) {
// arrange
type responseBody struct {
UserID string `json:"userId"`
Greeting string `json:"greeting"`
}
// create gin engine with handler
r := gin.New()
r.GET("/users/:userID/greetings/:greetingID", func(c *gin.Context) {
userID := c.Param("userID")
greetingID := c.Param("greetingID")
greetingFmt, found := map[string]string{
"morning": "Good morning, %s!",
"afternoon": "Great afternoon, %s!",
"evening": "Fair evening, %s!",
}[greetingID]
if !found {
c.Status(http.StatusNotFound)
return
}
c.JSON(http.StatusOK, responseBody{
UserID: userID,
Greeting: fmt.Sprintf(greetingFmt, userID),
})
})
handler := ginlambda.NewHandler(r)
// construct test request
request := events.APIGatewayProxyRequest{
HTTPMethod: "GET",
Path: "/users/Dave/greetings/afternoon",
}
expectedResponse := responseBody{
UserID: "Dave",
Greeting: "Great afternoon, Dave!",
}
// act
response, err := handler(context.Background(), request)
// assert
if err != nil {
t.Fatal("expected nil, received error:", err)
}
var actualResponse responseBody
unmarshalJSONString(t, response.Body, &actualResponse)
if expectedResponse != actualResponse {
t.Errorf("expected: %v, received: %v\n", expectedResponse, actualResponse)
}
if http.StatusOK != response.StatusCode {
t.Errorf("expected status code: %d, received status code: %d\n", http.StatusOK, response.StatusCode)
}
}
func Test_HandlerFunc_WithSingleValueQueryParams_ReturnsExpectedResult(t *testing.T) {
// arrange
type responseBody struct {
Greeting string `json:"greeting"`
}
// create gin engine with handler
r := gin.New()
r.GET("/greeting", func(c *gin.Context) {
name := c.Query("name")
timeOfDay := c.Query("timeOfDay")
greetingFmt, found := map[string]string{
"morning": "Good morning, %s!",
"afternoon": "Great afternoon, %s!",
"evening": "Fair evening, %s!",
}[timeOfDay]
if !found {
c.Status(http.StatusNotFound)
return
}
c.JSON(http.StatusOK, responseBody{
Greeting: fmt.Sprintf(greetingFmt, name),
})
})
handler := ginlambda.NewHandler(r)
// construct test request
request := events.APIGatewayProxyRequest{
HTTPMethod: "GET",
Path: "/greeting",
QueryStringParameters: map[string]string{
"name": "Spud",
"timeOfDay": "morning",
},
Headers: map[string]string{},
}
expectedResponse := responseBody{
Greeting: "Good morning, Spud!",
}
// act
response, err := handler(context.Background(), request)
// assert
if err != nil {
t.Fatal("expected nil, received error:", err)
}
var actualResponse responseBody
unmarshalJSONString(t, response.Body, &actualResponse)
if expectedResponse != actualResponse {
t.Errorf("expected: %v, received: %v\n", expectedResponse, actualResponse)
}
if http.StatusOK != response.StatusCode {
t.Errorf("expected status code: %d, received status code: %d\n", http.StatusOK, response.StatusCode)
}
}
func Test_HandlerFunc_WithMultiValueQueryParams_ReturnsExpectedResult(t *testing.T) {
// arrange
type responseBody struct {
Greeting string `json:"greeting"`
}
// create gin engine with handler
r := gin.New()
r.GET("/greeting", func(c *gin.Context) {
names := c.QueryArray("name")
timeOfDay := c.Query("timeOfDay")
greetingFmt, found := map[string]string{
"morning": "Good morning, %s!",
"afternoon": "Great afternoon, %s!",
"evening": "Fair evening, %s!",
}[timeOfDay]
if !found {
c.Status(http.StatusNotFound)
return
}
namesStr := strings.Join(names, " and ")
c.JSON(http.StatusOK, responseBody{
Greeting: fmt.Sprintf(greetingFmt, namesStr),
})
})
handler := ginlambda.NewHandler(r)
// construct test request
request := events.APIGatewayProxyRequest{
HTTPMethod: "GET",
Path: "/greeting",
MultiValueQueryStringParameters: map[string][]string{
"name": {"Trent", "Sydney"},
"timeOfDay": {"evening"},
},
MultiValueHeaders: map[string][]string{},
}
expectedResponse := responseBody{
Greeting: "Fair evening, Trent and Sydney!",
}
// act
response, err := handler(context.Background(), request)
// assert
if err != nil {
t.Fatal("expected nil, received error:", err)
}
var actualResponse responseBody
unmarshalJSONString(t, response.Body, &actualResponse)
if expectedResponse != actualResponse {
t.Errorf("expected: %v, received: %v\n", expectedResponse, actualResponse)
}
if http.StatusOK != response.StatusCode {
t.Errorf("expected status code: %d, received status code: %d\n", http.StatusOK, response.StatusCode)
}
}
func Test_HandlerFunc_WithRequestBody_ReturnsExpectedResult(t *testing.T) {
// arrange
type requestBody struct {
Name string `json:"name" binding:"required"`
GreetingType string `json:"greetingType" binding:"oneof=morning afternoon evening"`
}
type responseBody struct {
Greeting string `json:"greeting"`
}
type errorResponseBody struct {
ErrorText string `json:"errorText"`
}
r := gin.New()
r.POST("/create-greeting", func(c *gin.Context) {
var request requestBody
err := c.BindJSON(&request)
if err != nil {
c.JSON(http.StatusBadRequest, errorResponseBody{err.Error()})
return
}
greetingFmt := map[string]string{
"morning": "Good morning, %s!",
"afternoon": "Great afternoon, %s!",
"evening": "Fair evening, %s!",
}[request.GreetingType]
greeting := fmt.Sprintf(greetingFmt, request.Name)
c.JSON(http.StatusCreated, responseBody{greeting})
})
handler := ginlambda.NewHandler(r)
// construct test request
request := events.APIGatewayProxyRequest{
HTTPMethod: "POST",
Path: "/create-greeting",
Body: `{"name":"Janet","greetingType":"morning"}`,
}
expectedResponse := responseBody{
Greeting: "Good morning, Janet!",
}
// act
response, err := handler(context.Background(), request)
// assert
if err != nil {
t.Fatal("expected nil, received error:", err)
}
var actualResponse responseBody
unmarshalJSONString(t, response.Body, &actualResponse)
if expectedResponse != actualResponse {
t.Errorf("expected: %v, received: %v\n", expectedResponse, actualResponse)
}
if http.StatusCreated != response.StatusCode {
t.Errorf("expected status code: %d, received status code: %d\n", http.StatusCreated, response.StatusCode)
}
}
func Test_HandlerFunc_WithSingleValueHeaders_ReturnsExpectedResult(t *testing.T) {
// arrange
type responseBody struct {
Greeting string `json:"greeting"`
}
r := gin.New()
r.GET("/greeting", func(c *gin.Context) {
userID := c.GetHeader("x-user-id")
greeting := fmt.Sprintf("Good morning, %s!", userID)
c.JSON(http.StatusOK, responseBody{greeting})
})
handler := ginlambda.NewHandler(r)
// construct test request
request := events.APIGatewayProxyRequest{
HTTPMethod: "GET",
Path: "/greeting",
Headers: map[string]string{
"x-user-id": "Latiffany",
},
}
expectedResponse := responseBody{
Greeting: "Good morning, Latiffany!",
}
// act
response, err := handler(context.Background(), request)
// assert
if err != nil {
t.Fatal("expected nil, received error:", err)
}
var actualResponse responseBody
unmarshalJSONString(t, response.Body, &actualResponse)
if expectedResponse != actualResponse {
t.Errorf("expected: %v, received: %v\n", expectedResponse, actualResponse)
}
if http.StatusOK != response.StatusCode {
t.Errorf("expected status code: %d, received status code: %d\n", http.StatusOK, response.StatusCode)
}
}
func Test_HandlerFunc_WithMultiValueHeaders_ReturnsExpectedResult(t *testing.T) {
// arrange
type responseBody struct {
Greeting string `json:"greeting"`
}
r := gin.New()
r.GET("/greeting", func(c *gin.Context) {
userID := c.GetHeader("x-user-id")
greeting := fmt.Sprintf("Good morning, %s!", userID)
c.JSON(http.StatusOK, responseBody{greeting})
})
handler := ginlambda.NewHandler(r)
// construct test request
request := events.APIGatewayProxyRequest{
HTTPMethod: "GET",
Path: "/greeting",
MultiValueHeaders: map[string][]string{
"x-user-id": {"Buddy"},
},
}
expectedResponse := responseBody{
Greeting: "Good morning, Buddy!",
}
// act
response, err := handler(context.Background(), request)
// assert
if err != nil {
t.Fatal("expected nil, received error:", err)
}
var actualResponse responseBody
unmarshalJSONString(t, response.Body, &actualResponse)
if expectedResponse != actualResponse {
t.Errorf("expected: %v, received: %v\n", expectedResponse, actualResponse)
}
if http.StatusOK != response.StatusCode {
t.Errorf("expected status code: %d, received status code: %d\n", http.StatusOK, response.StatusCode)
}
}