isCatchingExceptions example

public function assertTraceNotContains($trace)
    {
        $traces = $this->cache->getTraces();
        $traces = current($traces);

        $this->assertDoesNotMatchRegularExpression('/'.$trace.'/', implode(', ', $traces));
    }

    public function assertExceptionsAreCaught()
    {
        $this->assertTrue($this->kernel->isCatchingExceptions());
    }

    public function assertExceptionsAreNotCaught()
    {
        $this->assertFalse($this->kernel->isCatchingExceptions());
    }

    public function request($method, $uri = '/', $server = [], $cookies = [], $esi = false, $headers = [])
    {
        if (null === $this->kernel) {
            throw new \LogicException('You must call setNextResponse() before calling request().');
        }