go: Add basic test for bundle.go (#417)

go/bundle/bundle_test.go

@@ -0,0 +1,58 @@
+package bundle_test
+
+import (
+	"bytes"
+	"net/http"
+	"net/url"
+	"reflect"
+	"testing"
+
+	. "github.com/WICG/webpackage/go/bundle"
+)
+
+func urlMustParse(rawurl string) *url.URL {
+	u, err := url.Parse(rawurl)
+	if err != nil {
+		panic(err)
+	}
+	return u
+}
+
+func createTestBundle() *Bundle {
+	return &Bundle{
+		Exchanges: []*Exchange{
+			&Exchange{
+				Request{
+					URL:    urlMustParse("https://bundle.example.com/"),
+					Header: make(http.Header),
+				},
+				Response{
+					Status: 200,
+					Header: http.Header{"Content-Type": []string{"text/html"}},
+					Body:   []byte("hello, world!"),
+				},
+			},
+		},
+	}
+}
+
+func TestWriteAndRead(t *testing.T) {
+	bundle := createTestBundle()
+
+	var buf bytes.Buffer
+	n, err := bundle.WriteTo(&buf)
+	if err != nil {
+		t.Errorf("Bundle.WriteTo unexpectedly failed: %v", err)
+	}
+	if n != int64(buf.Len()) {
+		t.Errorf("Bundle.WriteTo returned %d, but wrote %d bytes", n, buf.Len())
+	}
+
+	deserialized, err := Read(&buf)
+	if err != nil {
+		t.Errorf("Bundle.Read unexpectedly failed: %v", err)
+	}
+	if !reflect.DeepEqual(deserialized, bundle) {
+		t.Errorf("got: %v\nwant: %v", deserialized, bundle)
+	}
+}