sidedatacopies: introduce a sidedata testcase for test-copies.t

For now it is equivalent to the filelog case, but introducing this early helps
make the comings changesets clearer.

Differential Revision: https://phab.mercurial-scm.org/D6947

tests/test-copies.t

@@ -1,4 +1,4 b''
-#testcases filelog compatibility changeset
+#testcases filelog compatibility changeset sidedata
 
   $ cat >> $HGRCPATH << EOF
   > [extensions]
@@ -22,6 +22,13 b''
   > EOF
 #endif
 
+#if sidedata
+  $ cat >> $HGRCPATH << EOF
+  > [format]
+  > exp-use-copies-side-data-changeset = yes
+  > EOF
+#endif
+
   $ REPONUM=0
   $ newrepo() {
   >     cd $TESTTMP
@@ -302,6 +309,7 b" It's a little weird that it shows up on "
   x -> z
   $ hg debugpathcopies 0 2
   x -> z (filelog !)
+  x -> z (sidedata !)
 
 Copy file that exists on both sides of the merge, different content
   $ newrepo
@@ -395,7 +403,7 b' Copy x to y on one side of merge, create'
   $ hg debugpathcopies 2 3
   y -> z
   $ hg debugpathcopies 1 3
-  y -> z (no-filelog !)
+  y -> z (no-filelog no-sidedata !)
 
 Create x and y, then rename x to z on one side of merge, and rename y to z and
 modify z on the other side. When storing copies in the changeset, we don't
@@ -440,17 +448,18 b' Try merging the other direction too'
   o  0 add x and y
      x y
   $ hg debugpathcopies 1 4
-  y -> z (no-filelog !)
+  y -> z (no-filelog no-sidedata !)
   $ hg debugpathcopies 2 4
-  x -> z (no-filelog !)
+  x -> z (no-filelog no-sidedata !)
   $ hg debugpathcopies 0 4
   x -> z (filelog !)
+  x -> z (sidedata !)
   y -> z (compatibility !)
   y -> z (changeset !)
   $ hg debugpathcopies 1 5
-  y -> z (no-filelog !)
+  y -> z (no-filelog no-sidedata !)
   $ hg debugpathcopies 2 5
-  x -> z (no-filelog !)
+  x -> z (no-filelog no-sidedata !)
   $ hg debugpathcopies 0 5
   x -> z