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[Features][test-lib] Add message arg to the check function

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#1,010 1 comment 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty
2/5
Estimated time
1-3 hours
Newbie friendliness
50/100
Issue type
Feature
Clarity
Mostly clear
Activity status
Stale
Tech stack
shell, typescript
Domain
testing-qa

Research direction

Start with src/spec-node/featuresCLI/utils.ts#L75-L91 and inspect how the check function is called by existing feature tests. Define how the optional message is distinguished from the command arguments, preserve the current calling form, and verify that failed checks display the supplied message.

Written by the indexing model from the issue text.

Description

I would like to propose a change to the check function of the dev-container-features-test-lib script.

The function should take a message to display when the test fails, like other testing frameworks have.

The current function code is:
https://github.com/devcontainers/cli/blob/c246645f97fba402c3b1b95983e573e92bcec464/src/spec-node/featuresCLI/utils.ts#L75-L91

I propose to add a message on $2 or the last argument.
Any thoughts on this?

I would suggest something like this:

check() { 
     LABEL=$1 
     MESSAGE = $2 or ${!#}
 
     #
     # the rest of the function
     #
 } 

The new function should work like the examples below, and be backwards compatible

old: 
check "java version LTS installed as default" \
          grep "LTS" <(java --version)

new:
check "java version LTS installed as default" \
         grep "LTS" <(java --version) \
        "REASON: The installed version is: $(java --version)"

or 

check "java version LTS installed as default"  \
        "REASON: The installed version is: $(java --version)" \
        grep "LTS" <(java --version)
Dominant language
TypeScript
Stars
3k
Forks
461
Avg merge
18m
Merged PRs (30d)
5

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