tidymodels (#139)

Test that tidymodels is properly installed, and that one of its package works as expected.

http://b/174050294

Author: Philmod

tests/test_tidymodels.R

@@ -0,0 +1,11 @@
+context("tidymodels")
+
+test_that("tidymodels exists", {
+	library(tidymodels)
+})
+
+test_that("broom", {
+	library(broom)
+	fit <- lm(mpg ~ wt, mtcars)
+        expect_equal(ncol(tidy(fit)), 5)
+})