copytrace: add test-git-rename.t

Summary:
add test for git rename, confirm it does not detect renames. After we
complete the feature, this test should fail and need to update.

Reviewed By: quark-zju

Differential Revision: D42787246

fbshipit-source-id: b65c454b3abf1cf7b25e5a501e3b4c652940a834

eden/scm/tests/test-git-rename.t

@@ -0,0 +1,30 @@
+#require git no-windows
+#debugruntest-compatible
+
+  $ . $TESTDIR/git.sh
+  $ setconfig diff.git=True
+
+Prepare repo
+
+  $ hg init --git repo1
+  $ cd repo1
+  $ echo 1 >> a
+  $ hg ci -q -Am 'add a'
+
+Test mv
+
+  $ hg mv a b
+  $ hg ci -Am 'mv a -> b'
+  $ hg diff -r.~1 -r .
+  diff --git a/a b/a
+  deleted file mode 100644
+  --- a/a
+  +++ /dev/null
+  @@ -1,1 +0,0 @@
+  -1
+  diff --git a/b b/b
+  new file mode 100644
+  --- /dev/null
+  +++ b/b
+  @@ -0,0 +1,1 @@
+  +1