add ImageVariRequest/ImageEditRequest.ResponseFormat (#264)

* add ImageEditRequest.ResponseFormat

* add ImageEditRequest/ImageVariRequest.ResponseFormat

* complete image_test

* delete var prompt param

---------

Co-authored-by: Aceld <liudanbing@tal.com>

image.go

@@ -60,6 +60,7 @@ type ImageEditRequest struct {
 	Prompt         string   `json:"prompt,omitempty"`
 	N              int      `json:"n,omitempty"`
 	Size           string   `json:"size,omitempty"`
+	ResponseFormat string   `json:"response_format,omitempty"`
 }
 
 // CreateEditImage - API call to create an image. This is the main endpoint of the DALL-E API.
@@ -85,14 +86,22 @@ func (c *Client) CreateEditImage(ctx context.Context, request ImageEditRequest)
 	if err != nil {
 		return
 	}
+
 	err = builder.writeField("n", strconv.Itoa(request.N))
 	if err != nil {
 		return
 	}
+
 	err = builder.writeField("size", request.Size)
 	if err != nil {
 		return
 	}
+
+	err = builder.writeField("response_format", request.ResponseFormat)
+	if err != nil {
+		return
+	}
+
 	err = builder.close()
 	if err != nil {
 		return
@@ -114,6 +123,7 @@ type ImageVariRequest struct {
 	Image          *os.File `json:"image,omitempty"`
 	N              int      `json:"n,omitempty"`
 	Size           string   `json:"size,omitempty"`
+	ResponseFormat string   `json:"response_format,omitempty"`
 }
 
 // CreateVariImage - API call to create an image variation. This is the main endpoint of the DALL-E API.
@@ -132,10 +142,17 @@ func (c *Client) CreateVariImage(ctx context.Context, request ImageVariRequest)
 	if err != nil {
 		return
 	}
+
 	err = builder.writeField("size", request.Size)
 	if err != nil {
 		return
 	}
+
+	err = builder.writeField("response_format", request.ResponseFormat)
+	if err != nil {
+		return
+	}
+
 	err = builder.close()
 	if err != nil {
 		return

image_test.go

@@ -123,6 +123,7 @@ func TestImageEdit(t *testing.T) {
 		Prompt:         "There is a turtle in the pool",
 		N:              3,
 		Size:           CreateImageSize1024x1024,
+		ResponseFormat: CreateImageResponseFormatURL,
 	}
 	_, err = client.CreateEditImage(ctx, req)
 	checks.NoError(t, err, "CreateImage error")
@@ -158,6 +159,7 @@ func TestImageEditWithoutMask(t *testing.T) {
 		Prompt:         "There is a turtle in the pool",
 		N:              3,
 		Size:           CreateImageSize1024x1024,
+		ResponseFormat: CreateImageResponseFormatURL,
 	}
 	_, err = client.CreateEditImage(ctx, req)
 	checks.NoError(t, err, "CreateImage error")
@@ -223,6 +225,7 @@ func TestImageVariation(t *testing.T) {
 		Image:          origin,
 		N:              3,
 		Size:           CreateImageSize1024x1024,
+		ResponseFormat: CreateImageResponseFormatURL,
 	}
 	_, err = client.CreateVariImage(ctx, req)
 	checks.NoError(t, err, "CreateImage error")
@@ -336,6 +339,10 @@ func TestImageFormBuilderFailures(t *testing.T) {
 	_, err = client.CreateEditImage(ctx, req)
 	checks.ErrorIs(t, err, mockFailedErr, "CreateImage should return error if form builder fails")
 
+	failForField = "response_format"
+	_, err = client.CreateEditImage(ctx, req)
+	checks.ErrorIs(t, err, mockFailedErr, "CreateImage should return error if form builder fails")
+
 	failForField = ""
 	mockBuilder.mockClose = func() error {
 		return mockFailedErr
@@ -384,6 +391,10 @@ func TestVariImageFormBuilderFailures(t *testing.T) {
 	_, err = client.CreateVariImage(ctx, req)
 	checks.ErrorIs(t, err, mockFailedErr, "CreateVariImage should return error if form builder fails")
 
+	failForField = "response_format"
+	_, err = client.CreateVariImage(ctx, req)
+	checks.ErrorIs(t, err, mockFailedErr, "CreateVariImage should return error if form builder fails")
+
 	failForField = ""
 	mockBuilder.mockClose = func() error {
 		return mockFailedErr