line_where: Identify an individual line in a sequence of commands

In dtkaplan/checkr2: Exploring ideas for successor to checkr

Description

The tests are written in terms of pronouns

• F the function at the highest level (but with assignment removed)

• Z the name being bound to the line's value by assignment. ("" if no assignment.)

• V the value produced by the line.

• EX the expression itself (but with assignment removed)

Grab the lines after a specified line (which is included)

Usage

line_where(ex, ..., message = "")

lines_after(ex, ..., message = "")

Arguments

ex	expressions as made by for_checkr()
...	tests specifying the kind of line we want
message	A character string to be included as the message in the result. This can have moustaches written in terms of F, Z, V, or EX

Value

A checkr test result. By default, if the line is found, the result is an "OK", setting the stage for further testing. If no matching line is found, the result is a fail.

Examples

ex <- for_checkr(quote({x <- 2; y <- x^3; z <- y + x}))
line_where(ex, F == "^")

dtkaplan/checkr2 documentation built on May 17, 2019, 4:01 p.m.