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Fabien Potencier
2f202b006b
This PR was merged into the 3.x branch.
Discussion
----------
Fix Markup truthiness in boolean expressions
## Summary
Fixes Markup truthiness handling in boolean expressions.
`trim` can return a `Twig\Markup` instance for safe strings. Empty `Markup` objects must behave like empty strings in Twig truth tests, but PHP treats all objects as truthy. This caused expressions like this to incorrectly evaluate as true:
```twig
{% set x %} {% endset %}
{% if x|trim and x|trim %}fail{% else %}ok{% endif %}
```
This case was working properly in https://github.com/twigphp/Twig/releases/tag/v3.14.2 and earlier.
## Related commits
- Bug was introduced in [v3.15.0](https://github.com/twigphp/Twig/releases/tag/v3.15.0) in this commit https://github.com/twigphp/Twig/commit/10c3142d3b036910f63080070c101bfff61e0743
- Partially fixed here: https://github.com/twigphp/Twig/commit/10c3142d3b036910f63080070c101bfff61e0743
## Changes
- Added `TrueTest::wrap()` to centralize wrapping non-primitive expressions with Twig’s Markup-aware true test.
- Reused `TrueTest::wrap()` in:
- `IfNode`
- conditional ternary expressions
- `and`, `or`, and `xor` binary expressions
- Elvis expressions
- unary `not`
- Added regression coverage for boolean operators (`and`, `or`, `xor`, `not`) and ternary/Elvis expressions whose operands evaluate to empty `Markup`.
## Tests
```bash
./vendor/bin/simple-phpunit tests/IntegrationTest.php --filter markup_test
```
Commits
-------
f5afaabf54 Fix Markup truthiness in boolean expressions
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