test: add mock test for system_version

client/system.go

@@ -24,20 +24,6 @@ func (client *APIClient) SystemPing(ctx context.Context) (string, error) {
 	return string(data), nil
 }
 
-// SystemVersion requests daemon for system version.
-func (client *APIClient) SystemVersion(ctx context.Context) (*types.SystemVersion, error) {
-	resp, err := client.get(ctx, "/version", nil, nil)
-	if err != nil {
-		return nil, err
-	}
-
-	version := &types.SystemVersion{}
-	err = decodeBody(version, resp.Body)
-	ensureCloseReader(resp)
-
-	return version, err
-}
-
 // SystemInfo requests daemon for system info.
 func (client *APIClient) SystemInfo(ctx context.Context) (*types.SystemInfo, error) {
 	resp, err := client.get(ctx, "/info", nil, nil)

client/system_version.go

@@ -0,0 +1,21 @@
+package client
+
+import (
+	"context"
+
+	"github.com/alibaba/pouch/apis/types"
+)
+
+// SystemVersion requests daemon for system version.
+func (client *APIClient) SystemVersion(ctx context.Context) (*types.SystemVersion, error) {
+	resp, err := client.get(ctx, "/version", nil, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	version := &types.SystemVersion{}
+	err = decodeBody(version, resp.Body)
+	ensureCloseReader(resp)
+
+	return version, err
+}

client/system_version_test.go

@@ -0,0 +1,55 @@
+package client
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"strings"
+	"testing"
+
+	"encoding/json"
+	"github.com/alibaba/pouch/apis/types"
+)
+
+func TestSystemVersionError(t *testing.T) {
+	client := &APIClient{
+		HTTPCli: newMockClient(errorMockResponse(http.StatusInternalServerError, "Server error")),
+	}
+	_, err := client.SystemVersion(context.Background())
+	if err == nil || !strings.Contains(err.Error(), "Server error") {
+		t.Fatalf("expected a Server Error, got %v", err)
+	}
+}
+
+func TestSystemVersion(t *testing.T) {
+	expectedURL := "/version"
+
+	httpClient := newMockClient(func(req *http.Request) (*http.Response, error) {
+		if !strings.HasPrefix(req.URL.Path, expectedURL) {
+			return nil, fmt.Errorf("Expected URL '%s', got '%s'", expectedURL, req.URL)
+		}
+		version := types.SystemVersion{
+			GoVersion:  "go_version",
+			APIVersion: "API_version",
+		}
+		b, err := json.Marshal(version)
+		if err != nil {
+			return nil, err
+		}
+
+		return &http.Response{
+			StatusCode: http.StatusOK,
+			Body:       ioutil.NopCloser(bytes.NewReader([]byte(b))),
+		}, nil
+	})
+
+	client := &APIClient{
+		HTTPCli: httpClient,
+	}
+
+	if _, err := client.SystemVersion(context.Background()); err != nil {
+		t.Fatal(err)
+	}
+}