add test case for readline multi-line history

IPython/frontend/terminal/tests/test_interactivshell.py

@@ -0,0 +1,123
+# -*- coding: utf-8 -*-
+"""Tests for the key interactiveshell module.
+
+Authors
+-------
+* Julian Taylor
+"""
+#-----------------------------------------------------------------------------
+#  Copyright (C) 2011  The IPython Development Team
+#
+#  Distributed under the terms of the BSD License.  The full license is in
+#  the file COPYING, distributed as part of this software.
+#-----------------------------------------------------------------------------
+
+#-----------------------------------------------------------------------------
+# Imports
+#-----------------------------------------------------------------------------
+# stdlib
+import unittest
+
+from IPython.testing.decorators import skipif
+
+class InteractiveShellTestCase(unittest.TestCase):
+    def rl_hist_entries(self, rl, n):
+        """Get last n readline history entries as a list"""
+        return [rl.get_history_item(rl.get_current_history_length() - x)
+                for x in range(n - 1, -1, -1)]
+
+    def test_runs_without_rl(self):
+        """Test that function does not throw without readline"""
+        ip = get_ipython()
+        ip.has_readline = False
+        ip.readline = None
+        ip._replace_rlhist_multiline(u'source')
+
+    @skipif(not get_ipython().has_readline, 'no readline')
+    def test_replace_multiline_hist_disabled(self):
+        """Test that multiline replace does nothing if disabled"""
+        ip = get_ipython()
+        ip.multiline_history = False
+
+        ghist = [u'line1', u'line2']
+        for h in ghist:
+           ip.readline.add_history(h)
+        ip.hlen_before_cell = ip.readline.get_current_history_length()
+        ip._replace_rlhist_multiline(u'sourc€\nsource2')
+
+        self.assertEquals(ip.readline.get_current_history_length(),
+                          ip.hlen_before_cell)
+        hist = self.rl_hist_entries(ip.readline, 2)
+        self.assertEquals(hist, ghist)
+
+    @skipif(not get_ipython().has_readline, 'no readline')
+    def test_replace_multiline_hist_adds(self):
+        """Test that multiline replace function adds history"""
+        ip = get_ipython()
+
+        ip.hlen_before_cell = ip.readline.get_current_history_length()
+        ip._replace_rlhist_multiline(u'sourc€')
+
+        self.assertEquals(ip.hlen_before_cell,
+                          ip.readline.get_current_history_length())
+
+    @skipif(not get_ipython().has_readline, 'no readline')
+    def test_replace_multiline_hist_keeps_history(self):
+        """Test that multiline replace does not delete history"""
+        ip = get_ipython()
+        ip.multiline_history = True
+
+        ghist = [u'line1', u'line2']
+        for h in ghist:
+           ip.readline.add_history(h)
+
+        #start cell
+        ip.hlen_before_cell = ip.readline.get_current_history_length()
+        ip._replace_rlhist_multiline(u'sourc€\nsource2')
+
+        self.assertEquals(ip.readline.get_current_history_length(),
+                          ip.hlen_before_cell)
+        hist = self.rl_hist_entries(ip.readline, 3)
+        self.assertEquals(hist, ghist + ['sourc€\nsource2'])
+
+    @skipif(not get_ipython().has_readline, 'no readline')
+    def test_replace_multiline_hist_replaces(self):
+        """Test that multiline entries are replaced"""
+        ip = get_ipython()
+        ip.multiline_history = True
+
+        ip.readline.add_history(u'line0')
+        #start cell
+        ip.hlen_before_cell = ip.readline.get_current_history_length()
+        ip.readline.add_history('l€ne1')
+        ip.readline.add_history('line2')
+        #replace cell with single line
+        ip._replace_rlhist_multiline(u'l€ne1\nline2')
+
+        self.assertEquals(ip.readline.get_current_history_length(),
+                          ip.hlen_before_cell)
+        hist = self.rl_hist_entries(ip.readline, 2)
+        self.assertEquals(hist, [u'line0', 'l€ne1\nline2'])
+
+    @skipif(not get_ipython().has_readline, 'no readline')
+    def test_replace_multiline_hist_replaces_twice(self):
+        """Test that multiline entries are replaced twice"""
+        ip = get_ipython()
+        ip.multiline_history = True
+
+        ip.readline.add_history(u'line0')
+        #start cell
+        ip.hlen_before_cell = ip.readline.get_current_history_length()
+        ip.readline.add_history('l€ne1')
+        ip.readline.add_history('line2')
+        #replace cell with single line
+        ip._replace_rlhist_multiline(u'l€ne1\nline2')
+        ip.readline.add_history('l€ne3')
+        ip.readline.add_history('line4')
+        #replace cell with single line
+        ip._replace_rlhist_multiline(u'l€ne3\nline4')
+
+        self.assertEquals(ip.readline.get_current_history_length(),
+                          ip.hlen_before_cell)
+        hist = self.rl_hist_entries(ip.readline, 3)
+        self.assertEquals(hist, ['line0', 'l€ne1\nline2', 'l€ne3\nline4'])