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Need better framework for testing expectations #368

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hadley opened this issue Feb 19, 2016 · 0 comments
Closed

Need better framework for testing expectations #368

hadley opened this issue Feb 19, 2016 · 0 comments

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@hadley
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hadley commented Feb 19, 2016

e.g.

context("expect_output")

f <- function() NULL
g <- function() cat("!")

test_that("expect = NA checks for no output", {
  expect_error(expect_output(f(), NA), NA)
  expect_error(expect_output(g(), NA), "produced output")
})

test_that("expect = NULL checks for some output", {
  expect_error(expect_output(f(), NULL), "didn't produce output")
  expect_error(expect_output(g(), NULL), NA)
})

test_that("expect = string checks for match", {
  expect_error(expect_output(g(), "!"), NA)
  expect_error(expect_output(g(), "x"), "does not match 'x'")
})

And each expectation needs its own test file.

hadley added a commit that referenced this issue Feb 19, 2016
@hadley hadley closed this as completed in 42b9d1e Feb 19, 2016
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