avajs/ava

Support placeholder tokens in t.log()

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#1,654 opened on Jan 25, 2018

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enhancementhelp wantedscope:test-interface

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Description

t.log() is modeled after console.log(), which in Node.js uses util.format(). This function supports placeholder tokens. I couldn't quite find a maintained & ready module that would let us support the same tokens.

This is the behavior I'd expect:

Token Behavior
%s Cast the value to a string
%d Cast the value to a number
%i Parse the value as an integer
%f Parse the value as a float
%j Stringify the value as JSON, but output '[Circular]' if it contains circular references
%o Stringify using Concordance (current behavior since #1653)
%O Stringify using Concordance (current behavior since #1653)
%% Print '%'

Contributor guide

Research direction
Inspect Node.js util.format implementation and implement similar placeholder token support in AVA's t.log() function.
Tech stack
javascriptnodejs
Domain
testingdeveloper experience
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
JavaScriptNode.jsAVA basics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70