config: test priority involving include

Differential Revision: https://phab.mercurial-scm.org/D9916

tests/test-config.t

@@ -397,6 +397,9 b' setup necessary file'
   $ cat > file-A.rc << EOF
   > [config-test]
   > basic = value-A
+  > pre-include= value-A
+  > %include ./included.rc
+  > post-include= value-A
   > EOF
 
   $ cat > file-B.rc << EOF
@@ -404,6 +407,13 b' setup necessary file'
   > basic = value-B
   > EOF
 
+
+  $ cat > included.rc << EOF
+  > [config-test]
+  > pre-include= value-included
+  > post-include= value-included
+  > EOF
+
 Simple order checking
 ---------------------
 
@@ -411,3 +421,13 b' If file B is read after file A, value fr'
 
   $ HGRCPATH="file-A.rc:file-B.rc" hg config config-test.basic
   value-B
+
+Ordering from include
+---------------------
+
+value from an include overwrite value defined before the include, but not the one defined after the include
+
+  $ HGRCPATH="file-A.rc" hg config config-test.pre-include
+  value-included
+  $ HGRCPATH="file-A.rc" hg config config-test.post-include
+  value-A