APIRestTest::testInitSessionCredentials PHP Метод

    public function testInitSessionCredentials()
    {
        $res = $this->doHttpRequest('GET', 'initSession/', ['auth' => [TU_USER, TU_PASS]]);
        $this->assertNotEquals(null, $res, $this->last_error);
        $this->assertEquals(200, $res->getStatusCode());
        $this->assertContains("application/json; charset=UTF-8", $res->getHeader('content-type'));
        $body = $res->getBody();
        $data = json_decode($body, true);
        $this->assertNotEquals(false, $data);
        $this->assertArrayHasKey('session_token', $data);
        return $data['session_token'];
    }