Add third_party/pexpect

third_party/pexpect/tests/test_performance.py

Index: third_party/pexpect/tests/test_performance.py
diff --git a/third_party/pexpect/tests/test_performance.py b/third_party/pexpect/tests/test_performance.py
new file mode 100644
index 0000000000000000000000000000000000000000..7be0cf65927e3ff872bfac258f917039db36caa8
--- /dev/null
+++ b/third_party/pexpect/tests/test_performance.py
@@ -0,0 +1,107 @@
+#!/usr/bin/env python
+'''
+PEXPECT LICENSE
+
+    This license is approved by the OSI and FSF as GPL-compatible.
+        http://opensource.org/licenses/isc-license.txt
+
+    Copyright (c) 2012, Noah Spurrier <noah@noah.org>
+    PERMISSION TO USE, COPY, MODIFY, AND/OR DISTRIBUTE THIS SOFTWARE FOR ANY
+    PURPOSE WITH OR WITHOUT FEE IS HEREBY GRANTED, PROVIDED THAT THE ABOVE
+    COPYRIGHT NOTICE AND THIS PERMISSION NOTICE APPEAR IN ALL COPIES.
+    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+    MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+'''
+from __future__ import print_function
+
+import unittest, time, sys
+import platform
+import pexpect
+from . import PexpectTestCase
+
+# This isn't exactly a unit test, but it fits in nicely with the rest of the tests.
+
+class PerformanceTestCase (PexpectTestCase.PexpectTestCase):
+
+    '''Testing the performance of expect, with emphasis on wading through long
+    inputs. '''
+
+    if sys.version_info[0] >= 3:
+        @staticmethod
+        def _iter_n(n):
+            s = 'for n in range(1, %d+1): print(n)' % n
+            return s.encode('ascii')
+
+    else:
+        @staticmethod
+        def _iter_n(n):
+            return 'for n in range(1, %d+1): print(n)' % n
+
+    def plain_range(self, n):
+        e = pexpect.spawn('python', timeout=100)
+        self.assertEqual(e.expect(b'>>>'), 0)
+        e.sendline(self._iter_n(n))
+        self.assertEqual(e.expect(br'\.{3}'), 0)
+        e.sendline(b'')
+        self.assertEqual(e.expect([b'inquisition', '%d' % n]), 1)
+
+    def window_range(self, n):
+        e = pexpect.spawn('python', timeout=100)
+        self.assertEqual(e.expect(b'>>>'), 0)
+        e.sendline(self._iter_n(n))
+        self.assertEqual(e.expect(r'\.{3}'), 0)
+        e.sendline(b'')
+        self.assertEqual(e.expect([b'inquisition', '%d' % n], searchwindowsize=20), 1)
+
+    def exact_range(self, n):
+        e = pexpect.spawn('python', timeout=100)
+        self.assertEqual(e.expect_exact([b'>>>']), 0)
+        e.sendline(self._iter_n(n))
+        self.assertEqual(e.expect_exact([b'...']), 0)
+        e.sendline(b'')
+        self.assertEqual(e.expect_exact([b'inquisition', '%d' % n],timeout=520), 1)
+
+    def ewin_range(self, n):
+        e = pexpect.spawn('python', timeout=100)
+        self.assertEqual(e.expect_exact([b'>>>']), 0)
+        e.sendline(self._iter_n(n))
+        self.assertEqual(e.expect_exact([b'...']), 0)
+        e.sendline(b'')
+        self.assertEqual(e.expect_exact([b'inquisition', '%d' % n], searchwindowsize=20), 1)
+
+    def faster_range(self, n):
+        e = pexpect.spawn('python', timeout=100)
+        self.assertEqual(e.expect(b'>>>'), 0)
+        e.sendline(('list(range(1, %d+1))' % n).encode('ascii'))
+        self.assertEqual(e.expect([b'inquisition', '%d' % n]), 1)
+
+    def test_100000(self):
+        if platform.python_implementation() == 'PyPy':
+            raise unittest.SkipTest("This test fails on PyPy because of REPL differences")
+        print()
+        start_time = time.time()
+        self.plain_range (100000)
+        print("100000 calls to plain_range:", (time.time() - start_time))
+        start_time = time.time()
+        self.window_range(100000)
+        print("100000 calls to window_range:", (time.time() - start_time))
+        start_time = time.time()
+        self.exact_range (100000)
+        print("100000 calls to exact_range:", (time.time() - start_time))
+        start_time = time.time()
+        self.ewin_range  (100000)
+        print("100000 calls to ewin_range:", (time.time() - start_time))
+        start_time = time.time()
+        self.faster_range(100000)
+        print("100000 calls to faster_range:", (time.time() - start_time))
+
+if __name__ == "__main__":
+    unittest.main()
+
+suite = unittest.makeSuite(PerformanceTestCase,'test')