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+;;; em-unix-tests.el --- em-unix test suite  -*- lexical-binding:t -*-
+
+;; Copyright (C) 2023 Free Software Foundation, Inc.
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; Tests for Eshell's implementation of various UNIX commands.
+
+;;; Code:
+
+(require 'ert)
+(require 'em-unix)
+
+(require 'eshell-tests-helpers
+         (expand-file-name "eshell-tests-helpers"
+                           (file-name-directory (or load-file-name
+                                                    default-directory))))
+
+;;; Tests:
+
+(ert-deftest em-unix-test/compile/interactive ()
+  "Check that `eshell/compile' opens a compilation buffer interactively."
+  (skip-unless (executable-find "echo"))
+  (with-temp-eshell
+   (eshell-match-command-output "compile echo hello"
+                                "#<buffer \\*compilation\\*>")
+   (with-current-buffer "*compilation*"
+     (forward-line 3)
+     (should (looking-at "echo hello")))))
+
+(ert-deftest em-unix-test/compile/noninteractive ()
+  "Check that `eshell/compile' writes to stdout noninteractively."
+  (skip-unless (executable-find "echo"))
+  (eshell-command-result-equal "compile echo hello"
+                               "hello\n"))
+
+(ert-deftest em-unix-test/compile/pipeline ()
+  "Check that `eshell/compile' writes to stdout from a pipeline."
+  (skip-unless (and (executable-find "echo")
+                    (executable-find "cat")))
+  (with-temp-eshell
+   (eshell-match-command-output "compile echo hello | *cat"
+                                "\\`hello\n")))
+
+(ert-deftest em-unix-test/compile/subcommand ()
+  "Check that `eshell/compile' writes to stdout from a subcommand."
+  (skip-unless (and (executable-find "echo")
+                    (executable-find "cat")))
+  (with-temp-eshell
+   (eshell-match-command-output "echo ${compile echo hello}"
+                                "\\`hello\n")))
+
+;; em-unix-tests.el ends here