travis test to see if glmnet is installed

Author: topepo

tests/testthat/test_linear_reg_glmnet.R

@@ -1,7 +1,7 @@
 library(testthat)
 library(parsnip)
 library(rlang)
-
+library(glmnet)
 # ------------------------------------------------------------------------------
 
 context("linear regression execution with glmnet")
@@ -198,9 +198,9 @@ test_that('submodel prediction', {
   mp_res <- multi_predict(reg_fit, new_data = mtcars[1:4, -1], penalty = .1)
   mp_res <- do.call("rbind", mp_res$.pred)
   expect_equal(mp_res[[".pred"]], unname(pred_glmn[,1]))
-  
+
   expect_error(
-    multi_predict(reg_fit, newdata = mtcars[1:4, -1], penalty = .1), 
+    multi_predict(reg_fit, newdata = mtcars[1:4, -1], penalty = .1),
     "Did you mean"
   )
 })