fix test

notation_test.go

@@ -116,7 +116,7 @@ func TestSignBlobError(t *testing.T) {
 		{"invalidContentMediaType", &dummySigner{}, 1 * time.Second, reader, "video/mp4/zoping", jws.MediaTypeEnvelope, "invalid content media-type 'video/mp4/zoping': mime: unexpected content after media subtype"},
 		{"emptyContentMediaType", &dummySigner{}, 1 * time.Second, reader, "", jws.MediaTypeEnvelope, "content media-type cannot be empty"},
 		{"invalidSignatureMediaType", &dummySigner{}, 1 * time.Second, reader, "", "", "content media-type cannot be empty"},
-		{"nilReader", &dummySigner{}, 1 * time.Second, nil, "video/mp4", jws.MediaTypeEnvelope, "reader cannot be nil"},
+		{"nilReader", &dummySigner{}, 1 * time.Second, nil, "video/mp4", jws.MediaTypeEnvelope, "blobReader cannot be nil"},
 		{"nilSigner", nil, 1 * time.Second, reader, "video/mp4", jws.MediaTypeEnvelope, "signer cannot be nil"},
 		{"signerError", &dummySigner{fail: true}, 1 * time.Second, reader, "video/mp4", jws.MediaTypeEnvelope, "expected SignBlob failure"},
 	}