Add --data-dir option to test command

Understand using '-' on the command line to mean stdin

Fix last few unit tests that wanted to write to the filesystem; removes
outdata directory.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/tests/test_c25519.cpp b/src/tests/test_c25519.cpp
index db2a94e37..c04902674 100644
--- a/src/tests/test_c25519.cpp
+++ b/src/tests/test_c25519.cpp
@@ -20,7 +20,7 @@ class Curve25519_Sclarmult_Tests : public Text_Based_Test
    {
    public:
       Curve25519_Sclarmult_Tests() : Text_Based_Test(
-         Test::data_file("pubkey/c25519_scalar.vec"),
+         "pubkey/c25519_scalar.vec",
          {"Secret","Basepoint","Out"})
          {}