add a test for previous commit

Author: cpsievert

tests/testthat/test-ggplot-resize.R

@@ -0,0 +1,9 @@
+context("ggplotly-resize")
+
+test_that("ggplotly shouldn't populate layout.[width/height] by default", {
+  lay <- ggplotly(qplot(1:10))$x$layout
+  expect_null(lay$height)
+  expect_null(lay$width)
+})
+
+# TODO: test the functionality client side!