Wait for a callback to return a truthy value.

Parameters

int|float $timeout: Number of seconds to wait for.

callable $callback: The callback to call.

Return value

mixed The result of the callback.

1 call to DriverSpecificConnectionUnitTestBase::waitFor()

DriverSpecificConnectionUnitTestBase::assertNoConnection in core/tests/Drupal/KernelTests/Core/Database/DriverSpecificConnectionUnitTestBase.php

Asserts that a connection ID does not exist.

File

core/tests/Drupal/KernelTests/Core/Database/DriverSpecificConnectionUnitTestBase.php, line 116

Class

DriverSpecificConnectionUnitTestBase

Tests management of database connections.

Namespace

Drupal\KernelTests\Core\Database

Code

protected function waitFor(int|float $timeout, callable $callback) : mixed {
    $start = microtime(TRUE);
    $end = $start + $timeout;
    do {
        $result = call_user_func($callback, $this);
        if ($result) {
            break;
        }
        usleep(10000);
    } while (microtime(TRUE) < $end);
    return $result;
}

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