Moving error handlers to the cache implementations.

cache_test.go

@@ -0,0 +1,27 @@
+// Copyright 2014 The oauth2 Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package oauth2
+
+import (
+	"os"
+	"testing"
+)
+
+func TestFileCacheErrorHandling(t *testing.T) {
+	var lastErr error
+	fileCache := NewFileCache("/path/that/doesnt/exist")
+	fileCache.ErrorHandlerFunc = func(err error) {
+		lastErr = err
+	}
+	fileCache.Read()
+	if !os.IsNotExist(lastErr) {
+		t.Fatalf("Read should have invoked the error handling func with os.ErrNotExist, but read err is %v", lastErr)
+	}
+	lastErr = nil
+	fileCache.Write(&Token{})
+	if !os.IsNotExist(lastErr) {
+		t.Fatalf("Write should have invoked the error handling func with os.ErrNotExist, but read err is %v", lastErr)
+	}
+}