GuzzleHttp\Tests\Psr7\FunctionsTest::testDetermineMimetype PHP Метод

    public function testDetermineMimetype()
    {
        $this->assertNull(Psr7\mimetype_from_extension('not-a-real-extension'));
        $this->assertEquals('application/json', Psr7\mimetype_from_extension('json'));
        $this->assertEquals('image/jpeg', Psr7\mimetype_from_filename('/tmp/images/IMG034821.JPEG'));
    }