tests

tests/Feature/LayaClientTest.php

@@ -0,0 +1,99 @@
+<?php
+
+use GuzzleHttp\Client;
+use GuzzleHttp\Handler\MockHandler;
+use GuzzleHttp\HandlerStack;
+use GuzzleHttp\Middleware;
+use GuzzleHttp\Psr7\HttpFactory;
+use GuzzleHttp\Psr7\Response;
+use Laya\Exception\UnexpectedResponseException;
+use Laya\Laya;
+use Laya\LayaClient;
+use Laya\Question\QuestionSet;
+use Laya\Question\YesNoQuestion;
+
+/** @return array{LayaClient, ArrayObject} client and the recorded request history */
+function fakeClient(array $responses): array
+{
+    $history = new ArrayObject();
+    $stack = HandlerStack::create(new MockHandler($responses));
+    $stack->push(Middleware::history($history));
+    $factory = new HttpFactory();
+
+    return [new LayaClient(new Client(['handler' => $stack]), $factory, $factory, 'http://laya.test'), $history];
+}
+
+function json(array $body, int $status = 200): Response
+{
+    return new Response($status, ['Content-Type' => 'application/json'], json_encode($body));
+}
+
+function questions(): QuestionSet
+{
+    return QuestionSet::make()->add(new YesNoQuestion('angry', 'Upset?'));
+}
+
+it('posts the state and questions to /predict', function () {
+    [$client, $history] = fakeClient([json(['answers' => ['angry' => ['type' => 'noul', 'noul' => 0.8]]])]);
+
+    $result = $client->decide('hello', questions());
+
+    $request = $history[0]['request'];
+    expect($request->getMethod())->toBe('POST')
+        ->and((string) $request->getUri())->toBe('http://laya.test/predict')
+        ->and($request->getHeaderLine('Content-Type'))->toBe('application/json')
+        ->and($request->getHeaderLine('Accept'))->toBe('application/json')
+        ->and(json_decode((string) $request->getBody(), true))->toBe([
+            'state' => ['body' => 'hello'],
+            'questions' => ['angry' => ['type' => 'noul', 'instructions' => 'Upset?']],
+        ])
+        ->and($result->get('angry')->probability())->toBe(0.8);
+});
+
+it('sends an array state unchanged and includes the model when given', function () {
+    [$client, $history] = fakeClient([json(['answers' => []])]);
+
+    $client->decide(['subject' => 's', 'body' => 'b'], questions(), 'my-model');
+
+    $sent = json_decode((string) $history[0]['request']->getBody(), true);
+    expect($sent['state'])->toBe(['subject' => 's', 'body' => 'b'])
+        ->and($sent['model'])->toBe('my-model');
+});
+
+it('omits model when none is given', function () {
+    [$client, $history] = fakeClient([json(['answers' => []])]);
+
+    $client->decide('x', questions());
+
+    expect(json_decode((string) $history[0]['request']->getBody(), true))->not->toHaveKey('model');
+});
+
+it('gets /models', function () {
+    [$client, $history] = fakeClient([json(['models' => ['a', 'b']])]);
+
+    expect($client->models())->toBe(['models' => ['a', 'b']])
+        ->and($history[0]['request']->getMethod())->toBe('GET')
+        ->and((string) $history[0]['request']->getUri())->toBe('http://laya.test/models');
+});
+
+it('throws UnexpectedResponseException with the server detail on HTTP errors', function () {
+    [$client] = fakeClient([json(['detail' => 'bad model'], 422)]);
+
+    try {
+        $client->decide('x', questions());
+        $this->fail('expected exception');
+    } catch (UnexpectedResponseException $e) {
+        expect($e->statusCode())->toBe(422)
+            ->and($e->getMessage())->toBe('Laya returned HTTP 422: bad model');
+    }
+});
+
+it('throws JsonException when the body is not JSON', function () {
+    [$client] = fakeClient([new Response(200, [], 'not json')]);
+
+    $client->models();
+})->throws(JsonException::class);
+
+it('builds a client through discovery', function () {
+    expect(Laya::client('http://laya.test'))->toBeInstanceOf(LayaClient::class);
+});