[PATCH 07 of 13] revlog: add a doctest to _trimchunk

[Boris Feld]

# HG changeset patch
# User Boris Feld <boris.feld at octobus.net>
# Date 1531209884 -7200
#      Tue Jul 10 10:04:44 2018 +0200
# Node ID a532d65e9c8b5a27679a4400179a2c9c87c18fda
# Parent  10b76b9c8c2bba4d653ce72565236a005ceab6a6
# EXP-Topic write-for-sparse-read
# Available At https://bitbucket.org/octobus/mercurial-devel/
#              hg pull https://bitbucket.org/octobus/mercurial-devel/ -r a532d65e9c8b
revlog: add a doctest to _trimchunk

diff --git a/mercurial/revlog.py b/mercurial/revlog.py
--- a/mercurial/revlog.py
+++ b/mercurial/revlog.py
@@ -218,6 +218,41 @@ class _testrevlog(object):
 
 def _trimchunk(revlog, revs, startidx, endidx=None):
     """returns revs[startidx:endidx] without empty trailing revs
+
+    Doctest Setup
+    >>> revlog = _testrevlog([
+    ...  5,  #0
+    ...  10, #1
+    ...  12, #2
+    ...  12, #3 (empty)
+    ...  17, #4
+    ...  21, #5
+    ...  21, #6 (empty)
+    ... ])
+
+    Contiguous cases:
+    >>> _trimchunk(revlog, [0, 1, 2, 3, 4, 5, 6], 0)
+    [0, 1, 2, 3, 4, 5]
+    >>> _trimchunk(revlog, [0, 1, 2, 3, 4, 5, 6], 0, 5)
+    [0, 1, 2, 3, 4]
+    >>> _trimchunk(revlog, [0, 1, 2, 3, 4, 5, 6], 0, 4)
+    [0, 1, 2]
+    >>> _trimchunk(revlog, [0, 1, 2, 3, 4, 5, 6], 2, 4)
+    [2]
+    >>> _trimchunk(revlog, [0, 1, 2, 3, 4, 5, 6], 3)
+    [3, 4, 5]
+    >>> _trimchunk(revlog, [0, 1, 2, 3, 4, 5, 6], 3, 5)
+    [3, 4]
+
+    Discontiguous cases:
+    >>> _trimchunk(revlog, [1, 3, 5, 6], 0)
+    [1, 3, 5]
+    >>> _trimchunk(revlog, [1, 3, 5, 6], 0, 2)
+    [1]
+    >>> _trimchunk(revlog, [1, 3, 5, 6], 1, 3)
+    [3, 5]
+    >>> _trimchunk(revlog, [1, 3, 5, 6], 1)
+    [3, 5]
     """
     length = revlog.length
 
diff --git a/tests/test-doctest.py b/tests/test-doctest.py
--- a/tests/test-doctest.py
+++ b/tests/test-doctest.py
@@ -60,6 +60,7 @@ testmod('mercurial.patch')
 testmod('mercurial.pathutil')
 testmod('mercurial.parser')
 testmod('mercurial.pycompat')
+testmod('mercurial.revlog')
 testmod('mercurial.revsetlang')
 testmod('mercurial.smartset')
 testmod('mercurial.store')