tpm2d: add tests for the tpm2daemon

* configure.ac: Detect TPM emulator and enable tests.
* tests/tpm2dtests/: New test suite.
* tests/Makefile.am: Run tests.

--
Add a set of tests that exercise tpm2daemon handling of keys and
verify compatibility with non-tpm based keys.

Running this test infrastructure requires a tpm emulator, which is
tested for during configuration.  If an emulator is not found, the
tests won't be run since they require the presence of a TPM (although
the TPM handling code will still be built).

Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

- Fixed tests/Makefile.am for make distcheck.

Signed-off-by: Werner Koch <wk@gnupg.org>

tests/tpm2dtests/run-tests.scm

@@ -0,0 +1,43 @@
+;; Test-suite runner.
+;;
+;; Copyright (C) 2016 g10 Code GmbH
+;;
+;; This file is part of GnuPG.
+;;
+;; GnuPG is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 3 of the License, or
+;; (at your option) any later version.
+;;
+;; GnuPG is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with this program; if not, see <http://www.gnu.org/licenses/>.
+
+(if (string=? "" (getenv "abs_top_srcdir"))
+    (begin
+      (echo "Environment variable 'abs_top_srcdir' not set.  Please point it to"
+	    "tests/tpm2dtests.")
+      (exit 2)))
+
+;; Set objdir so that the tests can locate built programs.
+(setenv "objdir" (getcwd) #f)
+
+(define setup
+  (make-environment-cache (test::scm
+			   #f
+			   (path-join "tests" "tpm2dtests" "setup.scm")
+			   (in-srcdir "tests" "tpm2dtests" "setup.scm"))))
+
+(define tests (filter (lambda (arg) (not (string-prefix? arg "--"))) *args*))
+
+(run-tests (if (null? tests)
+	      (load-tests "tests" "tpm2dtests")
+	      (map (lambda (name)
+		      (test::scm setup
+				 (path-join "tests" "tpm2dtests" name)
+				 (in-srcdir "tests" "tpm2dtests" name)
+				 "--use-keyring")) tests)))