h_covr_helpers: Helpers for stripping expressions of 'covr'-inserted trace...
In Roche/crmPack: Object-Oriented Implementation of CRM Designs

h_covr_helpers

R Documentation

Helpers for stripping expressions of `covr`-inserted trace code

Description

Workarounds to allow the package to continue to work while running covr with minimal changes to the package code.

Usage

h_covr_active()

h_covr_detrace(expr)

h_is_covr_trace(expr)

h_covr_detrace_call(expr)

Arguments

expr

(language)
an R expression or call to test or strip of covr trace counters.

Details

When using covr, the source code for package objects are modified to add callbacks for each expression to log its execution. Given an arbitrary expression, such as:

expr

The code will be modified before executing any package code to look like:

if (TRUE) {
  covr:::count("file.R:1:2:3:4:5:6:7:8")
  expr
}

These functions are used for stripping expressions of this code so that the package continues to work as intended while running tests as part of running covr to calculate package coverage.

This method is non-exhaustive, covering only a subset of covr's tracing behaviors necessary for this package.

Value

A logical value or transformed expression with calls to covr:::count removed.

Functions

h_covr_active(): Determine whether covr is currently running
h_covr_detrace(): Remove covr traces from an expression
h_is_covr_trace(): Determine whether the current expression is a covr-modified expression
h_covr_detrace_call(): Extract the original expression from a covr-modified expression