avajs/ava

Support placeholder tokens in t.log()

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#1,654 创建于 2018年1月25日

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 (2 评论) (0 反应) (0 负责人)JavaScript (20,600 star) (1,408 fork)batch import
enhancementhelp wantedscope:test-interface

描述

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 '%'

贡献者指南

技术栈
javascriptnodejs
领域
testing
议题类型
feature
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
1-3 hours
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
fresh
清晰度议题是否清楚说明期望改动、验收标准和下一步。
clear
前置要求
basic JavaScriptunderstanding of console.log formatting
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
70
研究方向
Investigate the current implementation of `t.log()` in AVA (likely in `lib/test.js` or similar). Look at how `util.format` works in Node.js and consider implementing a simple formatter that supports `%s`, `%d`, `%i`, `%f`, `%j`, `%o`, `%O`, and `%%` tokens. Check for existing modules like `printf` or `sprintf js` but note that `util.format` is built in and may suffice. Also review the Concordance integration (from PR #1653) to ensure `%o` and `%O` behave as expected. No linked PRs or comments suggest dependencies. The issue is clear and unclaimed, making it suitable for a first time contributor.