capture_output: Capture output to console

In testthat: Unit Testing for R

Capture output to console

Description

Evaluates code in a special context in which all output is captured, similar to capture.output().

Usage

capture_output(code, print = FALSE, width = 80)

capture_output_lines(code, print = FALSE, width = 80)

testthat_print(x)

Arguments

code	Code to evaluate.
print	If TRUE and the result of evaluating code is visible, print the result using testthat_print().
width	Number of characters per line of output. This does not inherit from getOption("width") so that tests always use the same output width, minimising spurious differences.

Details

Results are printed using the testthat_print() generic, which defaults to print(), giving you the ability to customise the printing of your object in tests, if needed.

Value

capture_output() returns a single string. capture_output_lines() returns a character vector with one entry for each line

Examples

capture_output({
  cat("Hi!\n")
  cat("Bye\n")
})

capture_output_lines({
  cat("Hi!\n")
  cat("Bye\n")
})

capture_output("Hi")
capture_output("Hi", print = TRUE)

testthat documentation built on May 29, 2024, 9:38 a.m.