Add spec for stricter exec_cmd checks

Author: jacobvosmaer

spec/gitlab_shell_spec.rb

@@ -236,6 +236,15 @@
  Kernel.should_receive(:exec).with(kind_of(Hash), 1, 2, unsetenv_others: true).once
  shell.send :exec_cmd, 1, 2
  end
+
+ it "refuses to execute a lone non-array argument" do
+ expect { shell.send :exec_cmd, 1 }.to raise_error(GitlabShell::DisallowedCommandError)
+ end
+
+ it "allows one argument if it is an array" do
+ Kernel.should_receive(:exec).with(kind_of(Hash), [1, 2], unsetenv_others: true).once
+ shell.send :exec_cmd, [1, 2]
+ end
  end
 
  describe :api do