// * PutBlockFull
// - test that PutBlock returns 503 Full if the filesystem is full.
// (must mock FreeDiskSpace or Statfs? use a tmpfs?)
-
+//
+// * PutBlockWriteErr
+// - test the behavior when Write returns an error.
+// - Possible solutions: use a small tmpfs and a high
+// MIN_FREE_KILOBYTES to trick PutBlock into attempting
+// to write a block larger than the amount of space left
+// - use an interface to mock ioutil.TempFile with a File
+// object that always returns an error on write
+//
// ========================================
// GetBlock tests.
// ========================================