test: add storage stubs

Author: zlodes

tests/Stubs/CounterStorageStub.php

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+<?php
+
+declare(strict_types=1);
+
+namespace Zlodes\PrometheusClient\Tests\Stubs;
+
+use Zlodes\PrometheusClient\Storage\Commands\IncrementCounter;
+use Zlodes\PrometheusClient\Storage\Contracts\CounterStorage;
+
+final class CounterStorageStub implements CounterStorage
+{
+    public function incrementCounter(IncrementCounter $command): void
+    {
+    }
+
+    public function fetchCounters(): iterable
+    {
+        return [];
+    }
+
+    public function clearCounters(): void
+    {
+    }
+}

tests/Stubs/GaugeStorageStub.php

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+<?php
+
+declare(strict_types=1);
+
+namespace Zlodes\PrometheusClient\Tests\Stubs;
+
+use Zlodes\PrometheusClient\Storage\Commands\UpdateGauge;
+use Zlodes\PrometheusClient\Storage\Contracts\GaugeStorage;
+
+final class GaugeStorageStub implements GaugeStorage
+{
+    public function updateGauge(UpdateGauge $command): void
+    {
+    }
+
+    public function fetchGauges(): iterable
+    {
+        return [];
+    }
+
+    public function clearGauges(): void
+    {
+    }
+}

tests/Stubs/HistogramStorageStub.php

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+<?php
+
+declare(strict_types=1);
+
+namespace Zlodes\PrometheusClient\Tests\Stubs;
+
+use Zlodes\PrometheusClient\Storage\Commands\UpdateHistogram;
+use Zlodes\PrometheusClient\Storage\Contracts\HistogramStorage;
+
+final class HistogramStorageStub implements HistogramStorage
+{
+    public function updateHistogram(UpdateHistogram $command): void
+    {
+    }
+
+    public function fetchHistograms(): iterable
+    {
+        return [];
+    }
+
+    public function clearHistograms(): void
+    {
+    }
+}

tests/Stubs/SummaryStorageStub.php

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+<?php
+
+declare(strict_types=1);
+
+namespace Zlodes\PrometheusClient\Tests\Stubs;
+
+use Zlodes\PrometheusClient\Storage\Commands\UpdateSummary;
+use Zlodes\PrometheusClient\Storage\Contracts\SummaryStorage;
+
+final class SummaryStorageStub implements SummaryStorage
+{
+    public function updateSummary(UpdateSummary $command): void
+    {
+    }
+
+    public function fetchSummaries(): iterable
+    {
+        return [];
+    }
+
+    public function clearSummaries(): void
+    {
+    }
+}