moved testing code from sample to test file

Author: davidcavazos

vision/detect/set_endpoint.go

@@ -18,46 +18,23 @@ package main
 import (
 	"context"
 	"fmt"
-	"io"
 
 	vision "cloud.google.com/go/vision/apiv1"
 	"google.golang.org/api/option"
-	visionpb "google.golang.org/genproto/googleapis/cloud/vision/v1"
 )
 
 // setEndpoint changes your endpoint.
-func setEndpoint(w io.Writer, endpoint string) error {
+func setEndpoint(ctx context.Context, endpoint string) (*vision.ImageAnnotatorClient, error) {
 	// endpoint := "eu-vision.googleapis.com:443"
 
-	// Create a client with a custom endpoint.
-	ctx := context.Background()
+	// ctx := context.Background()
 	client, err := vision.NewImageAnnotatorClient(ctx, option.WithEndpoint(endpoint))
 	if err != nil {
-		return fmt.Errorf("NewImageAnnotatorClient: %v", err)
+		return nil, fmt.Errorf("NewImageAnnotatorClient: %v", err)
 	}
-	defer client.Close()
+	// defer client.Close()
 
-	// Use the client with custom endpoint to detect texts on an image.
-	image := &visionpb.Image{
-		Source: &visionpb.ImageSource{
-			GcsImageUri: "gs://cloud-samples-data/vision/text/screen.jpg",
-		},
-	}
-	maxResults := 3
-	texts, err := client.DetectTexts(ctx, image, nil, maxResults)
-	if err != nil {
-		return fmt.Errorf("DetectTexts: %v", err)
-	}
-
-	fmt.Fprintf(w, "Texts:\n")
-	for _, text := range texts {
-		fmt.Fprintf(w, "%v\n", text.GetDescription())
-		for _, vertex := range text.GetBoundingPoly().GetVertices() {
-			fmt.Fprintf(w, "  bounding vertex: %v, %v\n", vertex.GetX(), vertex.GetY())
-		}
-	}
-
-	return nil
+	return client, nil
 }
 
 // [END vision_set_endpoint]

vision/detect/set_endpoint_test.go

@@ -16,18 +16,43 @@ package main
 
 import (
 	"bytes"
+	"context"
+	"fmt"
 	"strings"
 	"testing"
+
+	visionpb "google.golang.org/genproto/googleapis/cloud/vision/v1"
 )
 
 func TestSetEndpoint(t *testing.T) {
-	const endpoint = "eu-vision.googleapis.com:443"
+	ctx := context.Background()
 
-	var buf bytes.Buffer
+	const endpoint = "eu-vision.googleapis.com:443"
 
-	if err := setEndpoint(&buf, endpoint); err != nil {
+	client, err := setEndpoint(ctx, endpoint)
+	if err != nil {
 		t.Fatalf("setEndpoint: %v", err)
 	}
+	defer client.Close()
+
+	image := &visionpb.Image{
+		Source: &visionpb.ImageSource{
+			GcsImageUri: "gs://cloud-samples-data/vision/text/screen.jpg",
+		},
+	}
+	texts, err := client.DetectTexts(ctx, image, nil, 1)
+	if err != nil {
+		t.Fatalf("DetectTexts: %v", err)
+	}
+
+	var buf bytes.Buffer
+	fmt.Fprintf(&buf, "Texts:\n")
+	for _, text := range texts {
+		fmt.Fprintf(&buf, "%v\n", text.GetDescription())
+		for _, vertex := range text.GetBoundingPoly().GetVertices() {
+			fmt.Fprintf(&buf, "  bounding vertex: %v, %v\n", vertex.GetX(), vertex.GetY())
+		}
+	}
 
 	if got, want := buf.String(), "System"; !strings.Contains(got, want) {
 		t.Errorf("setEndpoint got:\n----\n%s----\nWant to contain:\n----\n%s\n----", got, want)