Add simple test environment for core features

Signed-off-by: Solomon Hykes <solomon@dagger.io>

tests/helpers.bash

@@ -27,6 +27,11 @@ dagger_new_with_plan() {
 
 }
 
+# dagger helper to execute the right binary
+dagger() {
+    "${DAGGER}" "$@"
+}
+
 skip_unless_secrets_available() {
     local inputFile="$1"
     sops exec-file "$inputFile" echo  > /dev/null 2>&1 || skip "$inputFile cannot be decrypted"
@@ -38,4 +43,4 @@ skip_unless_local_kube() {
     else
         skip "local kubernetes cluster not available"
     fi
-}
+}