Skip some tests if gpg is not available (Issue#8).

test/crypto_test.rb

@@ -3,6 +3,10 @@
 require 'tempfile'
 
 describe GPGME::Crypto do
+  before do
+    skip unless GPGME::Engine.check_version GPGME::PROTOCOL_OpenPGP
+  end
+
   describe "default options functionality" do
     it "allows operation from instances normally" do
       crypto = GPGME::Crypto.new

test/ctx_test.rb

@@ -2,6 +2,10 @@
 require 'test_helper'
 
 describe GPGME::Ctx do
+  before do
+    skip unless GPGME::Engine.check_version GPGME::PROTOCOL_OpenPGP
+  end
+
   it "can instantiate" do
     assert_instance_of GPGME::Ctx, GPGME::Ctx.new
   end

test/key_test.rb

@@ -2,6 +2,9 @@
 require 'test_helper'
 
 describe GPGME::Key do
+  before do
+    skip unless GPGME::Engine.check_version GPGME::PROTOCOL_OpenPGP
+  end
 
   it "has certain attributes" do
     key = GPGME::Key.find(:secret).first

test/signature_test.rb

@@ -2,6 +2,10 @@
 require 'test_helper'
 
 describe GPGME::Signature do
+  before do
+    skip unless GPGME::Engine.check_version GPGME::PROTOCOL_OpenPGP
+  end
+
   it "#valid? is true when the signature is valid" do
     crypto = GPGME::Crypto.new
     signatures = 0

test/sub_key_test.rb

@@ -2,6 +2,9 @@
 require 'test_helper'
 
 describe GPGME::SubKey do
+  before do
+    skip unless GPGME::Engine.check_version GPGME::PROTOCOL_OpenPGP
+  end
 
   # We trust Key for common methods that come from KeyCommon
 

test/test_helper.rb

@@ -74,10 +74,12 @@ def without_key(key, &block)
   end
 end
 
-# We use a different home directory for the keys to not disturb current
-# installation
-
-require 'tmpdir'
-GPGME::Engine.home_dir = Dir.tmpdir
-remove_all_keys
-import_keys
+if GPGME::Engine.check_version GPGME::PROTOCOL_OpenPGP
+  # We use a different home directory for the keys to not disturb current
+  # installation
+
+  require 'tmpdir'
+  GPGME::Engine.home_dir = Dir.tmpdir
+  remove_all_keys
+  import_keys
+end