1context("Stats") 2 3test_that("plot succeeds even if some computation fails", { 4 df <- data_frame(x = 1:2, y = 1) 5 p1 <- ggplot(df, aes(x, y)) + geom_point() 6 7 b1 <- ggplot_build(p1) 8 expect_equal(length(b1$data), 1) 9 10 p2 <- p1 + geom_smooth() 11 expect_warning(b2 <- ggplot_build(p2), "Computation failed") 12 expect_equal(length(b2$data), 2) 13}) 14 15test_that("error message is thrown when aesthetics are missing", { 16 p <- ggplot(mtcars) + stat_sum() 17 expect_error(ggplot_build(p), "x and y$") 18}) 19