--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-patch-offset	Wed Dec 09 16:56:00 2009 -0800
@@ -0,0 +1,67 @@
+#!/bin/sh
+
+cat > writepatterns.py <<EOF
+import sys
+
+path = sys.argv[1]
+patterns = sys.argv[2:]
+
+fp = file(path, 'wb')
+for pattern in patterns:
+    count = int(pattern[0:-1])
+    char = pattern[-1] + '\n'
+    fp.write(char*count)
+fp.close()
+EOF
+
+echo % prepare repo
+hg init a
+cd a
+
+# These initial lines of Xs were not in the original file used to generate
+# the patch.  So all the patch hunks need to be applied to a constant offset
+# within this file.  If the offset isn't tracked then the hunks can be
+# applied to the wrong lines of this file.
+python ../writepatterns.py a 34X 10A 1B 10A 1C 10A 1B 10A 1D 10A 1B 10A 1E 10A 1B 10A
+hg commit -Am adda
+
+# This is a cleaner patch generated via diff
+# In this case it reproduces the problem when
+# the output of hg export does not
+echo % import patch
+hg import -v -m 'b' -d '2 0' - <<EOF
+--- a/a	2009-12-08 19:26:17.000000000 -0800
++++ b/a	2009-12-08 19:26:17.000000000 -0800
+@@ -9,7 +9,7 @@
+ A
+ A
+ B
+-A
++a
+ A
+ A
+ A
+@@ -53,7 +53,7 @@
+ A
+ A
+ B
+-A
++a
+ A
+ A
+ A
+@@ -75,7 +75,7 @@
+ A
+ A
+ B
+-A
++a
+ A
+ A
+ A
+EOF
+
+echo % compare imported changes against reference file
+python ../writepatterns.py aref 34X 10A 1B 1a 9A 1C 10A 1B 10A 1D 10A 1B 1a 9A 1E 10A 1B 1a 9A
+diff -u aref a
+