t7400: sync only works on initialized submodules

So initialize the submodule before syncing.  It's possible that `sync`
(and other submodule commands) should grow an --init option in the
style of `update`, but I've avoided that for now.

Signed-off-by: W. Trevor King <wking@tremily.us>

diff --git a/t/t7400-submodule-basic.sh b/t/t7400-submodule-basic.sh
index 1a9ac078386907d9c1cc0da22ed58789793734ca..97be72faca482803e6ee8d5ccf42b0106a4d0073 100755 (executable)
--- a/t/t7400-submodule-basic.sh
+++ b/t/t7400-submodule-basic.sh
@@ -478,6 +478,7 @@ test_expect_success 'use superproject as upstream when path is relative and no u
                cd addtest &&
                git submodule add ../repo relative &&
                test "$(git config -f .gitmodules submodule.relative.url)" = ../repo &&
+               git submodule init relative &&
                git submodule sync relative &&
                test "$(git config submodule.relative.url)" = "$submodurl/repo"
        )