[TwigComponent] Blocks set with TestHelper don't get evaluated

[janopae]

When playing with the reproducer I created for #3210, I realised InteractsWithTwigComponents::renderTwigComponent did not at all behave the way I expected:

Twig code inside blocks set using the $blocks parameter won't be evaluated. Variables won't be resolved, and Twig functions won't be executed. Instead, the resulting HTML will contain placeholders like {{ message }}.

This means that at the current state of the helper, basic interactions of components with their blocks can't be tested: You can't test if variables are being passed correctly or if their content is right.

This is a feature request to allow some form of testing the variables Twig components pass to their blocks.

#3211 would be a way to implement this, as it would enable evaluation of the blocks.

[smnandre]

I'm thinking you're reading this in the wrong side.

InteractWithTwigComponent is not made to test what context your component passes to Twig... but in the contrary to test what HTML is rendered depending on the context and what data is passed. ... and was mostly documented for embeds only, as passing blocks to TwigComponent is very similar to the behaviour of embed blocks.

Passing determinist/dependency-free content (instead of runtime resolved blocks) can help tests performances while increasing their value.

basic interactions of components with their blocks can't be tested

Not sure what you mean here, how would you do in Twig?