Add third_party/pexpect

third_party/pexpect/tests/test_replwrap.py

Index: third_party/pexpect/tests/test_replwrap.py
diff --git a/third_party/pexpect/tests/test_replwrap.py b/third_party/pexpect/tests/test_replwrap.py
new file mode 100644
index 0000000000000000000000000000000000000000..26ff53c6c70165911e1fd67030ab20c4513bbe0a
--- /dev/null
+++ b/third_party/pexpect/tests/test_replwrap.py
@@ -0,0 +1,105 @@
+import platform
+import unittest
+import re
+import os
+
+import pexpect
+from pexpect import replwrap
+
+skip_pypy = "This test fails on PyPy because of REPL differences"
+
+
+class REPLWrapTestCase(unittest.TestCase):
+    def setUp(self):
+        super(REPLWrapTestCase, self).setUp()
+        self.save_ps1 = os.getenv('PS1', r'\$')
+        self.save_ps2 = os.getenv('PS2', '>')
+        os.putenv('PS1', r'\$')
+        os.putenv('PS2', '>')
+
+    def tearDown(self):
+        super(REPLWrapTestCase, self).tearDown()
+        os.putenv('PS1', self.save_ps1)
+        os.putenv('PS2', self.save_ps2)
+
+    def test_bash(self):
+        bash = replwrap.bash()
+        res = bash.run_command("time")
+        assert 'real' in res, res
+
+    def test_pager_as_cat(self):
+        " PAGER is set to cat, to prevent timeout in ``man sleep``. "
+        bash = replwrap.bash()
+        res = bash.run_command('man sleep', timeout=5)
+        assert 'SLEEP' in res, res
+
+    def test_long_running_multiline(self):
+        " ensure the default timeout is used for multi-line commands. "
+        bash = replwrap.bash()
+        res = bash.run_command("echo begin\r\nsleep 2\r\necho done")
+        self.assertEqual(res.strip().splitlines(), ['begin', 'done'])
+
+    def test_long_running_continuation(self):
+        " also ensure timeout when used within continuation prompts. "
+        bash = replwrap.bash()
+        # The two extra '\\' in the following expression force a continuation
+        # prompt:
+        # $ echo begin\
+        #     + ;
+        # $ sleep 2
+        # $ echo done
+        res = bash.run_command("echo begin\\\n;sleep 2\r\necho done")
+        self.assertEqual(res.strip().splitlines(), ['begin', 'done'])
+
+    def test_multiline(self):
+        bash = replwrap.bash()
+        res = bash.run_command("echo '1 2\n3 4'")
+        self.assertEqual(res.strip().splitlines(), ['1 2', '3 4'])
+
+        # Should raise ValueError if input is incomplete
+        try:
+            bash.run_command("echo '5 6")
+        except ValueError:
+            pass
+        else:
+            assert False, "Didn't raise ValueError for incomplete input"
+
+        # Check that the REPL was reset (SIGINT) after the incomplete input
+        res = bash.run_command("echo '1 2\n3 4'")
+        self.assertEqual(res.strip().splitlines(), ['1 2', '3 4'])
+
+    def test_existing_spawn(self):
+        child = pexpect.spawn("bash", timeout=5, echo=False, encoding='utf-8')
+        repl = replwrap.REPLWrapper(child, re.compile('[$#]'),
+                                    "PS1='{0}' PS2='{1}' "
+                                    "PROMPT_COMMAND=''")
+
+        res = repl.run_command("echo $HOME")
+        assert res.startswith('/'), res
+
+    def test_python(self):
+        if platform.python_implementation() == 'PyPy':
+            raise unittest.SkipTest(skip_pypy)
+
+        p = replwrap.python()
+        res = p.run_command('4+7')
+        assert res.strip() == '11'
+
+        res = p.run_command('for a in range(3): print(a)\n')
+        assert res.strip().splitlines() == ['0', '1', '2']
+
+    def test_no_change_prompt(self):
+        if platform.python_implementation() == 'PyPy':
+            raise unittest.SkipTest(skip_pypy)
+
+        child = pexpect.spawn('python', echo=False, timeout=5, encoding='utf-8')
+        # prompt_change=None should mean no prompt change
+        py = replwrap.REPLWrapper(child, u">>> ", prompt_change=None,
+                                  continuation_prompt=u"... ")
+        assert py.prompt == ">>> "
+
+        res = py.run_command("for a in range(3): print(a)\n")
+        assert res.strip().splitlines() == ['0', '1', '2']
+
+if __name__ == '__main__':
+    unittest.main()