test: Create test for passing -- parameter

Author: ocean

testdata/simple.ahoy.yml

@@ -2,3 +2,9 @@ ahoyapi: v2
 commands:
   echo:
     cmd: echo "$@"
+
+  list:
+    cmd: ls -a "$@"
+
+  whalesay:
+    cmd: docker run --rm docker/whalesay cowsay -f dragon "$@"

tests/simple.bats

@@ -13,3 +13,8 @@
   result="$(./ahoy -f testdata/simple.ahoy.yml echo something)"
   [ "$result" == "something" ]
 }
+
+@test "run a simple ahoy command (ls -a) with an extra parameter (-l)" {
+  run ./ahoy -f testdata/simple.ahoy.yml list -- -l
+  [ "${#lines[@]}" -gt 13 ]
+}