Add tests.

transport_test.go

@@ -0,0 +1,82 @@
+package oauth2
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+)
+
+type mockCache struct{ token *Token }
+
+func (m *mockCache) Read() (token *Token, err error) {
+	return m.token, nil
+}
+
+func (m *mockCache) Write(token *Token) {
+	m.token = token
+}
+
+type mockTokenFetcher struct{ token *Token }
+
+func (f *mockTokenFetcher) FetchToken(existing *Token) (*Token, error) {
+	return f.token, nil
+}
+
+func TestInitialTokenRead(t *testing.T) {
+	cache := &mockCache{token: &Token{
+		AccessToken: "abc",
+	}}
+	tr, _ := NewAuthorizedTransportWithCache(nil, cache)
+	server := newMockServer(func(w http.ResponseWriter, r *http.Request) {
+		if r.Header.Get("Authorization") != "Bearer abc" {
+			t.Fatalf("Transport doesn't read the token initially from the cache")
+		}
+	})
+	defer server.Close()
+	client := http.Client{Transport: tr}
+	client.Get(server.URL)
+}
+
+func TestTokenWrite(t *testing.T) {
+	fetcher := &mockTokenFetcher{
+		token: &Token{
+			AccessToken: "abc",
+		},
+	}
+	// cache with expired token
+	cache := &mockCache{token: &Token{}}
+	tr, _ := NewAuthorizedTransportWithCache(fetcher, cache)
+	server := newMockServer(func(w http.ResponseWriter, r *http.Request) {
+		if r.Header.Get("Authorization") != "Bearer abc" {
+			t.Fatalf("Transport doesn't read the token initially from the cache")
+		}
+	})
+	defer server.Close()
+
+	client := http.Client{Transport: tr}
+	client.Get(server.URL)
+	if cache.token.AccessToken != "abc" {
+		t.Fatalf("New token is not cached, found %v", cache.token)
+	}
+}
+
+func TestExpiredWithNoAccessToken(t *testing.T) {
+	token := &Token{}
+	if !token.Expired() {
+		t.Fatalf("Token should be expired if no access token is provided")
+	}
+}
+
+func TestExpiredWithExpiry(t *testing.T) {
+	token := &Token{
+		Expiry: time.Now().Add(-5 * time.Hour),
+	}
+	if !token.Expired() {
+		t.Fatalf("Token should be expired if no access token is provided")
+	}
+}
+
+func newMockServer(handler func(w http.ResponseWriter, r *http.Request)) *httptest.Server {
+	return httptest.NewServer(http.HandlerFunc(handler))
+}