ContentTranslationUITestBase stragglers

This is strange, but these tests fail locally for me with:

Object of class Drupal\Core\StringTranslation\TranslatableMarkup could not be converted to int

That's what it took to pass. I don't know why.

Well, this is due to the fact that WebAssert::responseContains() should take a string. But AssertLegacyTrait::assertRaw() sends there the object in this case. Next fix also works.

PhpStrorm found 718 usages of AssertLegacyTrait::assertRaw (Ctrl+B by method). Many of them using t() value. I tried to run some of them - and they also fail (but pass with fix from #6).

But why this does not happen on DI?

Also in Drupal\KernelTests\AssertContentTrait we have

protected function assertRaw($raw, $message = '', $group = 'Other') {
  ...
  return $this->assert(strpos($this->getRawContent(), (string) $raw) ...
}

protected function assertNoRaw($raw, $message = '', $group = 'Other') {
  ...
  return $this->assert(strpos($this->getRawContent(), (string) $raw)...
}

So, maybe (string) $raw will give more compatibility between KernelTests\AssertContentTrait and FunctionalTests\AssertLegacyTrait?

#7: Done.

The problem in the latest version of the Mink. After https://github.com/minkphp/Mink/pull/743.

public function responseContains($text) {
...
-  $regex = '/'.preg_quote($text, '/').'/ui';
-  $this->assert((bool) preg_match($regex, $actual), $message);
+  $this->assert(strpos($actual, $text) !== FALSE, $message);
}

Current versioin:
$this->assert(stripos($actual, $text) !== false, $message);

Edit:

• Before $text casting to string.
• After $text casting to int (like needle parameter of the strpos/stripos)

Yep, sorry for noise about it here. Back to #3 RTBC.

#12.2 #2948700: Casting $text value to string in responseContains/responseNotContains methods.

So, please do not add credit to me here. The patch does not contain my work. My credit is waiting for me in #2948700 :)