Added cmd_otr tests

tests/test_cmd_otr.c

@@ -0,0 +1,45 @@
+#include <stdarg.h>
+#include <stddef.h>
+#include <setjmp.h>
+#include <cmocka.h>
+#include <stdlib.h>
+#include <string.h>
+#include <glib.h>
+
+#include "config.h"
+
+#include "ui/mock_ui.h"
+
+#include "command/command.h"
+#include "command/commands.h"
+
+#ifdef HAVE_LIBOTR
+void cmd_otr_shows_usage_when_no_args(void **state)
+{
+    mock_cons_show();
+    CommandHelp *help = malloc(sizeof(CommandHelp));
+    help->usage = "Some usage";
+    gchar *args[] = { NULL };
+
+    expect_cons_show("Usage: Some usage");
+
+    gboolean result = cmd_otr(args, *help);
+    assert_true(result);
+
+    free(help);
+}
+#else
+void cmd_otr_shows_message_when_otr_unsupported(void **state)
+{
+    mock_cons_show();
+    CommandHelp *help = malloc(sizeof(CommandHelp));
+    gchar *args[] = { "gen", NULL };
+
+    expect_cons_show("This version of Profanity has not been built with OTR support enabled");
+
+    gboolean result = cmd_otr(args, *help);
+    assert_true(result);
+
+    free(help);
+}
+#endif