Fix Spark tests for tree models

Author: juliasilge

tests/testthat/test_boost_tree_spark.R

@@ -30,7 +30,7 @@ test_that('spark execution', {
         boost_tree(trees = 5, mode = "regression") %>%
           set_engine("spark", seed = 12),
         control = ctrl,
-        class ~ .,
+        compounds ~ .,
         data = hpc_bt_tr
       ),
     regexp = NA

tests/testthat/test_rand_forest_spark.R

@@ -31,7 +31,7 @@ test_that('spark execution', {
         rand_forest(trees = 5, mode = "regression") %>%
           set_engine("spark", seed = 12),
         control = ctrl,
-        Sepal_Length ~ .,
+        compounds ~ .,
         data = hpc_rf_tr
       ),
     regexp = NA
@@ -44,7 +44,7 @@ test_that('spark execution', {
         rand_forest(trees = 5, mode = "regression") %>%
           set_engine("spark", seed = 12),
         control = ctrl,
-        Sepal_Length ~ .,
+        compounds ~ .,
         data = hpc_rf_tr
       ),
     regexp = NA