Add MockClient to simplify downstream testing

.travis.yml

@@ -28,4 +28,4 @@ install:
   - composer install --no-interaction
 
 script:
-  - php vendor/bin/phpunit --testsuite=functional
+  - php vendor/bin/phpunit

phpunit.xml.dist

@@ -10,6 +10,9 @@
         <testsuite name="functional">
             <directory suffix="Test.php">tests/Functional</directory>
         </testsuite>
+        <testsuite name="unit">
+            <directory suffix="Test.php">tests/Unit</directory>
+        </testsuite>
     </testsuites>
     <php>
         <server name="KERNEL_DIR" value="tests/Functional/App"/>

src/Client/MockClient.php

@@ -0,0 +1,182 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Okvpn\Bundle\DatadogBundle\Client;
+
+final class MockClient implements DogStatsInterface
+{
+    private $data = [];
+
+    public function increment(string $metrics, int $delta = 1, float $sampleRate = 1.0, array $tags = [])
+    {
+        $this->data['increments'][] = [
+            'metric' => $metrics,
+            'delta' => $delta,
+            'sampleRate' => $sampleRate,
+            'tags' => $tags,
+        ];
+
+        return $this;
+    }
+
+    public function getIncrements(string $metric = null): array
+    {
+        return $this->get('increments', $metric);
+    }
+
+    public function decrement(string $metric, int $delta = 1, float $sampleRate = 1.0, array $tags = [])
+    {
+        $this->data['decrements'][] = [
+            'metric' => $metric,
+            'delta' => $delta,
+            'sampleRate' => $sampleRate,
+            'tags' => $tags,
+        ];
+
+        return $this;
+    }
+
+    public function getDecrements(string $metric = null): array
+    {
+        return $this->get('decrements', $metric);
+    }
+
+    public function timing(string $metric, float $time, array $tags = [])
+    {
+        $this->data['timings'][] = [
+            'metric' => $metric,
+            'time' => $time,
+            'tags' => $tags,
+        ];
+
+        return $this;
+    }
+
+    public function getTimings(string $metric = null): array
+    {
+        return $this->get('timings', $metric);
+    }
+
+    public function time(string $metric, callable $func, array $tags = [])
+    {
+        $timerStart = microtime(true);
+        $func();
+        $timerEnd = microtime(true);
+        $time = round(($timerEnd - $timerStart) * 1000, 4);
+
+        return $this->timing($metric, $time, $tags);
+    }
+
+    public function gauge(string $metric, int $value, array $tags = [])
+    {
+        $this->data['gauges'][] = [
+            'metric' => $metric,
+            'value' => $value,
+            'tags' => $tags,
+        ];
+
+        return $this;
+    }
+
+    public function getGauges(string $metric = null): array
+    {
+        return $this->get('gauges', $metric);
+    }
+
+    public function histogram(string $metric, float $value, float $sampleRate = 1.0, array $tags = [])
+    {
+        $this->data['histograms'][] = [
+            'metric' => $metric,
+            'value' => $value,
+            'sampleRate' => $sampleRate,
+            'tags' => $tags,
+        ];
+
+        return $this;
+    }
+
+    public function getHistograms(string $metric = null): array
+    {
+        return $this->get('histograms', $metric);
+    }
+
+    public function set(string $metric, int $value, array $tags = [])
+    {
+        $this->data['sets'][] = [
+            'metric' => $metric,
+            'value' => $value,
+            'tags' => $tags,
+        ];
+
+        return $this;
+    }
+
+    public function getSets(string $metric = null): array
+    {
+        return $this->get('sets', $metric);
+    }
+
+    public function event(string $title, string $text, array $metadata = [], array $tags = [])
+    {
+        $this->data['events'][] = [
+            'title' => $title,
+            'text' => $text,
+            'metadata' => $metadata,
+            'tags' => $tags,
+        ];
+
+        return $this;
+    }
+
+    public function getEvents(string $title = null): array
+    {
+        return $this->get('events', $title);
+    }
+
+    public function serviceCheck(string $name, int $status, array $metadata = [], array $tags = [])
+    {
+        $this->data['serviceChecks'][] = [
+            'name' => $name,
+            'status' => $status,
+            'metadata' => $metadata,
+            'tags' => $tags,
+        ];
+
+        return $this;
+    }
+
+    public function getServiceChecks(string $name = null): array
+    {
+        return $this->get('serviceChecks', $name);
+    }
+
+    public function getOptions(): array
+    {
+        return [];
+    }
+
+    public function getOption(string $name, $default = null)
+    {
+        return $default;
+    }
+
+    private function get(string $type, string $metric = null): array
+    {
+        if ($metric === null) {
+            return $this->data[$type];
+        }
+
+        if ($type === 'events') {
+            $key = 'title';
+        } elseif ($type === 'serviceChecks') {
+            $key = 'name';
+        } else {
+            $key = 'metric';
+        }
+
+        return array_filter($this->data[$type], static function (array $data) use ($key, $metric) {
+            return $data[$key] === $metric;
+        });
+    }
+}