Issue #18425: Unittests for idlelib.IdleHistory. First patch by R. Jayakrishnan.
diff --git a/Lib/idlelib/IdleHistory.py b/Lib/idlelib/IdleHistory.py
index 25fe6e4..dc1ac8b 100644
--- a/Lib/idlelib/IdleHistory.py
+++ b/Lib/idlelib/IdleHistory.py
@@ -49,7 +49,13 @@
self.text.insert(where, output)
def fetch(self, reverse):
- "Fetch statememt and enter into text at cursor."
+ '''Fetch statememt and replace current line in text widget.
+
+ Set prefix and pointer as needed for successive fetches.
+ Reset them to None, None when returning to the start line.
+ Sound bell when return to start line or cannot leave a line
+ because cyclic is False.
+ '''
nhist = len(self.history)
pointer = self.pointer
prefix = self.prefix
@@ -64,7 +70,7 @@
else:
if self.cyclic:
pointer = -1 # will be incremented
- else:
+ else: # abort history_next
self.text.bell()
return
nprefix = len(prefix)
@@ -75,7 +81,7 @@
pointer = pointer + 1
if pointer < 0 or pointer >= nhist:
self.text.bell()
- if not self.cyclic and pointer < 0:
+ if not self.cyclic and pointer < 0: # abort history_prev
return
else:
if self._get_source("iomark", "end-1c") != prefix:
@@ -106,3 +112,9 @@
self.history.append(source)
self.pointer = None
self.prefix = None
+
+if __name__ == "__main__":
+ from test import support
+ support.use_resources = ['gui']
+ from unittest import main
+ main('idlelib.idle_test.test_idlehistory', verbosity=2, exit=False)