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;;; 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")))))
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