Add test for positional args.

Author: Matt Pearson

arg-parsing-test.bats

@@ -75,4 +75,10 @@ write_conf_file() {
 	parse_args --message "a message"
 	assert that "$commit_message" = "a message"
 }
+@test '        correctly handles positional args.' {
+	parse_args pos-dir pos-branch pos-repo
+	assert that "$deploy_directory" = "pos-dir"
+	assert that "$deploy_branch" = "pos-branch"
+	assert that "$repo" = "pos-repo"
+}