extract_test() creates a minimal reprex for a failed expectation.
It extracts all non-test code before the failed expectation as well as
all code inside the test up to and including the failed expectation.
This is particularly useful when you're debugging test failures in someone else's package.
Usage
extract_test(location, path = stdout(), package = Sys.getenv("TESTTHAT_PKG"))Arguments
- location
A string giving the location in the form
FILE:LINE[:COLUMN].- path
Path to write the reprex to. Defaults to
stdout().- package
If supplied, will be used to construct a test environment for the extracted code.
Value
This function is called for its side effect of rendering a
reprex to path. This function will never error: if extraction
fails, the error message will be written to path.
Examples
# If you see a test failure like this:
# ── Failure (test-extract.R:46:3): errors if can't find test ───────────────
# Expected FALSE to be TRUE.
# Differences:
# `actual`: FALSE
# `expected`: TRUE
# You can run this:
if (FALSE) extract_test("test-extract.R:46:3") # \dontrun{}
# to see just the code needed to reproduce the failure