;;; rust-cargo-tests.el --- ERT tests for rust-cargo.el -*- lexical-binding: t; -*-

(require 'rust-cargo)

(require 'ert)

(defun rust-test--wait-process-exit ()

"Wait for comint process for current buffer to exit."

(let ((proc (get-buffer-process (current-buffer))))

(while (not (eq (process-status proc) 'exit))

(sit-for 0.2))))

(defun rust-test--send-process-string (string)

"Send STRING to comint process for current buffer."

(let ((proc (get-buffer-process (current-buffer))))

(comint-send-string proc string)))

(defmacro rust-test--with-main-file-buffer (expr)

`(let* ((test-dir (expand-file-name "test-project/" default-directory))

(main-file (expand-file-name "src/main.rs" test-dir)))

(save-current-buffer

(find-file main-file)

,expr)))

(defun rust-test--find-string (string)

"Find STRING in current buffer."

(goto-char (point-min))

(not (null (search-forward string nil t))))

(ert-deftest rust-test-compile ()

(skip-unless (executable-find rust-cargo-bin))

(setq rust-cargo-default-arguments "")

(rust-test--with-main-file-buffer

(with-current-buffer (rust-compile)

(rust-test--wait-process-exit)

(should (rust-test--find-string "Compilation finished")))))

(ert-deftest rust-test-run ()

(skip-unless (executable-find rust-cargo-bin))

(setq rust-cargo-default-arguments "")

(rust-test--with-main-file-buffer

(with-current-buffer (rust-run)

(rust-test--wait-process-exit)

(should (rust-test--find-string "***run not interactive")))))

(ert-deftest rust-test-run-interactive ()

(skip-unless (executable-find rust-cargo-bin))

(setq rust-cargo-default-arguments "interactive")

(rust-test--with-main-file-buffer

;; '(4) is default value when called interactively with universal argument

(with-current-buffer (rust-run '(4))

(rust-test--send-process-string "1234\n")

(rust-test--wait-process-exit)

(should (rust-test--find-string "***run interactive: 1234")))))