* Fix the tests.

tests/substituter.sh

@@ -1,10 +1,19 @@
-#! /bin/sh -ex
-echo $*
-
-case $* in
-    *)
-        mkdir $1
-        echo $3 $4 > $1/hello
-        ;;
-esac        
+#! /bin/sh -e
+echo substituter args: $* >&2
 
+if test $1 = "--query-paths"; then
+    cat $TEST_ROOT/sub-paths
+elif test $1 = "--query-info"; then
+    shift
+    for i in in $@; do
+        echo $i
+        echo "" # deriver
+        echo 0 # nr of refs
+    done
+elif test $1 = "--substitute"; then
+    mkdir $2
+    echo "Hallo Wereld" > $2/hello
+else
+    echo "unknown substituter operation"
+    exit 1
+fi