Proyectos de Subversion Moodle

<?php

// This file is part of Moodle - http://moodle.org/

//

// Moodle is free software: you can redistribute it and/or modify

// it under the terms of the GNU General Public License as published by

// the Free Software Foundation, either version 3 of the License, or

// (at your option) any later version.

//

// Moodle is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

//

// You should have received a copy of the GNU General Public License

// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

namespace aiprovider_ollama;

use core_ai\aiactions\base;

use core_ai\provider;

use GuzzleHttp\Psr7\Response;

defined('MOODLE_INTERNAL') || die();

require_once(__DIR__ . '/testcase_helper_trait.php');

/**

 * Test Generate text provider class for Ollama provider methods.

 *

 * @package    aiprovider_ollama

 * @copyright  2024 Matt Porritt <matt.porritt@moodle.com>

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 * @covers     \aiprovider_ollama\provider

 * @covers     \aiprovider_ollama\process_generate_text

 * @covers     \aiprovider_ollama\abstract_processor

 */

final class process_generate_text_test extends \advanced_testcase {

    use testcase_helper_trait;

    /** @var string A successful response in JSON format. */

    protected string $responsebodyjson;

    /** @var \core_ai\manager AI Manager. */

    private $manager;

    /** @var provider The provider that will process the action. */

    protected provider $provider;

    /** @var base The action to process. */

    protected base $action;

    /**

     * Set up the test.

     */

    protected function setUp(): void {

        parent::setUp();

        $this->resetAfterTest();

        // Load a response body from a file.

        $this->responsebodyjson = file_get_contents(self::get_fixture_path('aiprovider_ollama', 'text_request_success.json'));

        $this->manager = \core\di::get(\core_ai\manager::class);

        $this->provider = $this->create_provider(

            actionclass: \core_ai\aiactions\generate_text::class,

            actionconfig: [

                'systeminstruction' => get_string('action_generate_text_instruction', 'core_ai'),

            ],

        );

        $this->create_action();

    }

    /**

     * Create the action object.

     * @param int $userid The user id to use in the action.

     */

    private function create_action(int $userid = 1): void {

        $this->action = new \core_ai\aiactions\generate_text(

            contextid: 1,

            userid: $userid,

            prompttext: 'This is a test prompt',

        );

    }

    /**

     * Test create_request_object

     */

    public function test_create_request_object(): void {

        $processor = new process_generate_text($this->provider, $this->action);

        // We're working with a private method here, so we need to use reflection.

        $method = new \ReflectionMethod($processor, 'create_request_object');

        $request = $method->invoke($processor, 1);

        $body = (object) json_decode($request->getBody()->getContents());

        $this->assertEquals('This is a test prompt', $body->prompt);

        $this->assertEquals('llama3.2', $body->model);

    }

    /**

     * Test create_request_object with extra model settings.

     */

    public function test_create_request_object_with_model_settings(): void {

        $this->provider = $this->create_provider(

            actionclass: \core_ai\aiactions\generate_text::class,

            actionconfig: [

                'systeminstruction' => get_string('action_generate_text_instruction', 'core_ai'),

                'temperature' => '0.5',

                'mirostat' => '1',

                'seed' => '50',

            ],

        );

        $processor = new process_generate_text($this->provider, $this->action);

        // We're working with a private method here, so we need to use reflection.

        $method = new \ReflectionMethod($processor, 'create_request_object');

        $request = $method->invoke($processor, 1);

        $body = (object) json_decode($request->getBody()->getContents());

        $this->assertEquals('llama3.2', $body->model);

        $this->assertEquals('0.5', $body->options->temperature);

        $this->assertEquals('1', $body->options->mirostat);

        $this->assertEquals('50', $body->options->seed);

        $this->provider = $this->create_provider(

            actionclass: \core_ai\aiactions\generate_text::class,

            actionconfig: [

                'model' => 'my-custom-ollama',

                'systeminstruction' => get_string('action_generate_text_instruction', 'core_ai'),

                'modelextraparams' => '{"temperature": 0.5,"mirostat": 1,"seed": "50"}',

            ],

        );

        $processor = new process_generate_text($this->provider, $this->action);

        // We're working with a private method here, so we need to use reflection.

        $method = new \ReflectionMethod($processor, 'create_request_object');

        $request = $method->invoke($processor, 1);

        $body = (object) json_decode($request->getBody()->getContents());

        $this->assertEquals('my-custom-ollama', $body->model);

        $this->assertEquals('0.5', $body->options->temperature);

        $this->assertEquals('1', $body->options->mirostat);

        $this->assertEquals('50', $body->options->seed);

    }

    /**

     * Test the API error response handler method.

     */

    public function test_handle_api_error(): void {

        $responses = [

            500 => new Response(500, ['Content-Type' => 'application/json']),

            503 => new Response(503, ['Content-Type' => 'application/json']),

            401 => new Response(

                401,

                ['Content-Type' => 'application/json'],

                json_encode(['error' => ['message' => 'Invalid Authentication']]),

            ),

            404 => new Response(

                404,

                ['Content-Type' => 'application/json'],

                json_encode(['error' => ['message' => 'You must be a member of an organization to use the API']]),

            ),

            429 => new Response(

                429,

                ['Content-Type' => 'application/json'],

                json_encode(['error' => ['message' => 'Rate limit reached for requests']]),

            ),

        ];

        $processor = new process_generate_text($this->provider, $this->action);

        $method = new \ReflectionMethod($processor, 'handle_api_error');

        foreach ($responses as $status => $response) {

            $result = $method->invoke($processor, $response);

            $this->assertEquals($status, $result['errorcode']);

            if ($status == 500) {

                $this->assertEquals('Internal Server Error', $result['errormessage']);

            } else if ($status == 503) {

                $this->assertEquals('Service Unavailable', $result['errormessage']);

            } else {

                $this->assertStringContainsString($response->getBody()->getContents(), $result['errormessage']);

            }

        }

    }

    /**

     * Test the API success response handler method.

     */

    public function test_handle_api_success(): void {

        $response = new Response(

            200,

            ['Content-Type' => 'application/json'],

            $this->responsebodyjson,

        );

        // We're testing a private method, so we need to setup reflector magic.

        $processor = new process_generate_text($this->provider, $this->action);

        $method = new \ReflectionMethod($processor, 'handle_api_success');

        $result = $method->invoke($processor, $response);

        $this->assertTrue($result['success']);

        $this->assertStringContainsString('World War II was a global conflict', $result['generatedcontent']);

        $this->assertEquals('stop', $result['finishreason']);

        $this->assertEquals('75', $result['prompttokens']);

        $this->assertEquals('123', $result['completiontokens']);

    }

    /**

     * Test query_ai_api for a successful call.

     */

    public function test_query_ai_api_success(): void {

        // Mock the http client to return a successful response.

        ['mock' => $mock] = $this->get_mocked_http_client();

        // The response from Ollama.

        $mock->append(new Response(

            200,

            ['Content-Type' => 'application/json'],

            $this->responsebodyjson,

        ));

        $processor = new process_generate_text($this->provider, $this->action);

        $method = new \ReflectionMethod($processor, 'query_ai_api');

        $result = $method->invoke($processor);

        $this->assertTrue($result['success']);

        $this->assertStringContainsString('World War II was a global conflict', $result['generatedcontent']);

        $this->assertEquals('stop', $result['finishreason']);

        $this->assertEquals('75', $result['prompttokens']);

        $this->assertEquals('123', $result['completiontokens']);

    }

    /**

     * Test prepare_response success.

     */

    public function test_prepare_response_success(): void {

        $processor = new process_generate_text($this->provider, $this->action);

        // We're working with a private method here, so we need to use reflection.

        $method = new \ReflectionMethod($processor, 'prepare_response');

        $response = [

            'success' => true,

            'id' => 'chatcmpl-9lkwPWOIiQEvI3nfcGofJcmS5lPYo',

            'fingerprint' => 'fp_c4e5b6fa31',

            'generatedcontent' => 'Sure, here is some sample text',

            'finishreason' => 'stop',

            'prompttokens' => '11',

            'completiontokens' => '568',

        ];

        $result = $method->invoke($processor, $response);

        $this->assertInstanceOf(\core_ai\aiactions\responses\response_base::class, $result);

        $this->assertTrue($result->get_success());

        $this->assertEquals('generate_text', $result->get_actionname());

        $this->assertEquals($response['success'], $result->get_success());

        $this->assertEquals($response['generatedcontent'], $result->get_response_data()['generatedcontent']);

    }

    /**

     * Test prepare_response error.

     */

    public function test_prepare_response_error(): void {

        $processor = new process_generate_text($this->provider, $this->action);

        // We're working with a private method here, so we need to use reflection.

        $method = new \ReflectionMethod($processor, 'prepare_response');

        $response = [

            'success' => false,

            'errorcode' => 500,

            'errormessage' => 'Internal server error.',

        ];

        $result = $method->invoke($processor, $response);

        $this->assertInstanceOf(\core_ai\aiactions\responses\response_base::class, $result);

        $this->assertFalse($result->get_success());

        $this->assertEquals('generate_text', $result->get_actionname());

        $this->assertEquals($response['errorcode'], $result->get_errorcode());

        $this->assertEquals($response['errormessage'], $result->get_errormessage());

    }

    /**

     * Test process method.

     */

    public function test_process(): void {

        $this->resetAfterTest();

        // Log in user.

        $this->setUser($this->getDataGenerator()->create_user());

        // Mock the http client to return a successful response.

        ['mock' => $mock] = $this->get_mocked_http_client();

        // The response from Ollama.

        $mock->append(new Response(

            200,

            ['Content-Type' => 'application/json'],

            $this->responsebodyjson,

        ));

        $processor = new process_generate_text($this->provider, $this->action);

        $result = $processor->process();

        $this->assertInstanceOf(\core_ai\aiactions\responses\response_base::class, $result);

        $this->assertTrue($result->get_success());

        $this->assertEquals('generate_text', $result->get_actionname());

    }

    /**

     * Test process method with error.

     */

    public function test_process_error(): void {

        $this->resetAfterTest();

        // Log in user.

        $this->setUser($this->getDataGenerator()->create_user());

        // Mock the http client to return a successful response.

        ['mock' => $mock] = $this->get_mocked_http_client();

        // The response from Ollama.

        $mock->append(new Response(

            401,

            ['Content-Type' => 'application/json'],

            json_encode(['error' => ['message' => 'Invalid Authentication']]),

        ));

        $processor = new process_generate_text($this->provider, $this->action);

        $result = $processor->process();

        $this->assertInstanceOf(\core_ai\aiactions\responses\response_base::class, $result);

        $this->assertFalse($result->get_success());

        $this->assertEquals('generate_text', $result->get_actionname());

        $this->assertEquals(401, $result->get_errorcode());

        $this->assertEquals('Invalid Authentication', $result->get_errormessage());

    }

    /**

     * Test process method with user rate limiter.

     */

    public function test_process_with_user_rate_limiter(): void {

        $this->resetAfterTest();

        // Create users.

        $user1 = $this->getDataGenerator()->create_user();

        $user2 = $this->getDataGenerator()->create_user();

        // Log in user1.

        $this->setUser($user1);

        // Mock clock.

        $clock = $this->mock_clock_with_frozen();

        // Set the user rate limiter.

        $config = [

            'enableuserratelimit' => true,

            'userratelimit' => 1,

            'endpoint' => "http://localhost:11434/",

        ];

        $provider = $this->manager->create_provider_instance(

            classname: '\aiprovider_ollama\provider',

            name: 'dummy',

            config: $config,

            actionconfig: [

                \core_ai\aiactions\generate_text::class => [

                    'settings' => [

                        'model' => 'llama3.2',

                        'systeminstruction' => get_string('action_generate_text_instruction', 'core_ai'),

                    ],

                ],

            ],

        );

        // Mock the http client to return a successful response.

        ['mock' => $mock] = $this->get_mocked_http_client();

        // Case 1: User rate limit has not been reached.

        $this->create_action($user1->id);

        // The response from Ollama.

        $mock->append(new Response(

            200,

            ['Content-Type' => 'application/json'],

            $this->responsebodyjson,

        ));

        $processor = new process_generate_text($provider, $this->action);

        $result = $processor->process();

        $this->assertTrue($result->get_success());

        // Case 2: User rate limit has been reached.

        $clock->bump(HOURSECS - 10);

        // The response from Ollama.

        $mock->append(new Response(

            200,

            ['Content-Type' => 'application/json'],

            $this->responsebodyjson,

        ));

        $this->create_action($user1->id);

        $processor = new process_generate_text($provider, $this->action);

        $result = $processor->process();

        $this->assertEquals(429, $result->get_errorcode());

        $this->assertEquals('User rate limit exceeded', $result->get_errormessage());

        $this->assertFalse($result->get_success());

        // Case 3: User rate limit has not been reached for a different user.

        // Log in user2.

        $this->setUser($user2);

        $this->create_action($user2->id);

        // The response from Ollama.

        $mock->append(new Response(

            200,

            ['Content-Type' => 'application/json'],

            $this->responsebodyjson,

        ));

        $processor = new process_generate_text($provider, $this->action);

        $result = $processor->process();

        $this->assertTrue($result->get_success());

        // Case 4: Time window has passed, user rate limit should be reset.

        $clock->bump(11);

        // Log in user1.

        $this->setUser($user1);

        // The response from Ollama.

        $mock->append(new Response(

            200,

            ['Content-Type' => 'application/json'],

            $this->responsebodyjson,

        ));

        $this->create_action($user1->id);

        $processor = new process_generate_text($provider, $this->action);

        $result = $processor->process();

        $this->assertTrue($result->get_success());

    }

    /**

     * Test process method with global rate limiter.

     */

    public function test_process_with_global_rate_limiter(): void {

        $this->resetAfterTest();

        // Create users.

        $user1 = $this->getDataGenerator()->create_user();

        $user2 = $this->getDataGenerator()->create_user();

        // Log in user1.

        $this->setUser($user1);

        // Mock clock.

        $clock = $this->mock_clock_with_frozen();

        // Set the global rate limiter.

        $config = [

            'enableglobalratelimit' => true,

            'globalratelimit' => 1,

            'endpoint' => "http://localhost:11434/",

        ];

        $provider = $this->manager->create_provider_instance(

            classname: '\aiprovider_ollama\provider',

            name: 'dummy',

            config: $config,

            actionconfig: [

                \core_ai\aiactions\generate_text::class => [

                    'settings' => [

                        'model' => 'llama3.2',

                        'systeminstruction' => get_string('action_generate_text_instruction', 'core_ai'),

                    ],

                ],

            ],

        );

        // Mock the http client to return a successful response.

        ['mock' => $mock] = $this->get_mocked_http_client();

        // Case 1: Global rate limit has not been reached.

        $this->create_action($user1->id);

        // The response from Ollama.

        $mock->append(new Response(

            200,

            ['Content-Type' => 'application/json'],

            $this->responsebodyjson,

        ));

        $processor = new process_generate_text($provider, $this->action);

        $result = $processor->process();

        $this->assertTrue($result->get_success());

        // Case 2: Global rate limit has been reached.

        $clock->bump(HOURSECS - 10);

        // The response from Ollama.

        $mock->append(new Response(

            200,

            ['Content-Type' => 'application/json'],

            $this->responsebodyjson,

        ));

        $this->create_action($user1->id);

        $processor = new process_generate_text($provider, $this->action);

        $result = $processor->process();

        $this->assertEquals(429, $result->get_errorcode());

        $this->assertEquals('Global rate limit exceeded', $result->get_errormessage());

        $this->assertFalse($result->get_success());

        // Case 3: Global rate limit has been reached for a different user too.

        // Log in user2.

        $this->setUser($user2);

        $this->create_action($user2->id);

        // The response from Ollama.

        $mock->append(new Response(

            200,

            ['Content-Type' => 'application/json'],

            $this->responsebodyjson,

        ));

        $processor = new process_generate_text($provider, $this->action);

        $result = $processor->process();

        $this->assertFalse($result->get_success());

        // Case 4: Time window has passed, global rate limit should be reset.

        $clock->bump(11);

        // Log in user1.

        $this->setUser($user1);

        // The response from Ollama.

        $mock->append(new Response(

            200,

            ['Content-Type' => 'application/json'],

            $this->responsebodyjson,

        ));

        $this->create_action($user1->id);

        $processor = new process_generate_text($provider, $this->action);

        $result = $processor->process();

        $this->assertTrue($result->get_success());

    }

}