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context("Stats")
test_that("plot succeeds even if some computation fails", {
df <- data_frame(x = 1:2, y = 1)
p1 <- ggplot(df, aes(x, y)) + geom_point()
b1 <- ggplot_build(p1)
expect_equal(length(b1$data), 1)
p2 <- p1 + geom_smooth()
expect_warning(b2 <- ggplot_build(p2), "Computation failed")
expect_equal(length(b2$data), 2)
})
test_that("error message is thrown when aesthetics are missing", {
p <- ggplot(mtcars) + stat_sum()
expect_error(ggplot_build(p), "x and y$")
})
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