Added unit tests

Specifically: references to default_files and default_auth_methods
shouldn't modify the class variables, so we're asserting whether the
before and after states are equal.

1 files changed, 19 insertions, 0 deletions

diff --git a/test/test_config.rb b/test/test_config.rb
index 6c34f7a..21af929 100644
--- a/test/test_config.rb
+++ b/test/test_config.rb
@@ -286,6 +286,25 @@ class TestConfig < NetSSHTest
     assert_equal %w(~/.ssh/id.pem ~/.ssh/id2.pem ~/.ssh/id3.pem), net_ssh[:keys]
   end
 
+
+  def test_default_files_not_mutable
+    original_default_files = Net::SSH::Config.default_files.clone
+
+    default_files = Net::SSH::Config.default_files
+    default_files.push('garbage')
+
+    assert_equal(original_default_files, Net::SSH::Config.default_files)
+  end
+
+  def test_default_auth_methods_not_mutable
+    original_default_auth_methods = Net::SSH::Config.default_auth_methods.clone
+
+    default_auth_methods = Net::SSH::Config.default_auth_methods
+    default_auth_methods.push('garbage')
+
+    assert_equal(original_default_auth_methods, Net::SSH::Config.default_auth_methods)
+  end
+
   private
 
     def with_home_env(value,&block)