Add OpdaviesTwigExtensionTest

.gitignore

@@ -7,3 +7,7 @@
 
 /node_modules/
 /source/build/
+
+# PHPUnit.
+/.phpunit.cache/
+/.phpunit.result.cache

composer.json

@@ -12,5 +12,12 @@
     "autoload": {
         "psr-4": {
             "App\\": "src" }
-   }
+   },
+   "autoload-dev": {
+        "psr-4": {
+            "App\\Tests\\": "tests" }
+   },
+    "require-dev": {
+        "phpunit/phpunit": "^11.1"
+    }
 }

phpunit.xml.dist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" bootstrap="./vendor/autoload.php" colors="true" stopOnFailure="true" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/11.1/phpunit.xsd" cacheDirectory=".phpunit.cache">
+  <testsuites>
+    <testsuite name="unit tests">
+      <directory suffix="Test.php">tests</directory>
+    </testsuite>
+  </testsuites>
+</phpunit>

tests/Opdavies/TwigExtension/OpdaviesTwigExtensionTest.php

@@ -0,0 +1,78 @@
+<?php
+
+namespace App\Tests\Opdavies\TwigExtension;
+
+use App\Opdavies\TwigExtension\OpdaviesTwigExtension;
+use Dflydev\DotAccessConfiguration\Configuration;
+use PHPUnit\Framework\TestCase;
+use Sculpin\Contrib\ProxySourceCollection\ProxySourceItem;
+
+class OpdaviesTwigExtensionTest extends TestCase
+{
+    private OpdaviesTwigExtension $extension;
+
+    public function setUp(): void
+    {
+        $this->extension = new OpdaviesTwigExtension();
+    }
+
+    public function testNoPastEvents(): void
+    {
+        $talk = $this->createTalk(
+            events: [
+                    ['date' => (new \DateTime('+1 days'))->getTimestamp()],
+            ],
+        );
+
+       self::assertSame(0, $this->extension->getPastTalkCount([$talk]));
+    }
+
+    public function testSinglePastEvent(): void
+    {
+        $talkA = $this->createTalk(
+            events: [
+                    ['date' => (new \DateTime('+1 days'))->getTimestamp()],
+            ],
+        );
+
+        $talkB = $this->createTalk(
+            events: [
+                ['date' => (new \DateTime('-3 days'))->getTimestamp()],
+            ],
+        );
+
+        self::assertSame(1, $this->extension->getPastTalkCount([$talkA, $talkB]));
+    }
+
+    public function testMultiplePastEvents(): void
+    {
+        $talkA = $this->createTalk(
+            events: [
+                    ['date' => (new \DateTime('-1 days'))->getTimestamp()],
+                    ['date' => (new \DateTime('+1 days'))->getTimestamp()],
+            ],
+        );
+
+        $talkB = $this->createTalk(
+            events: [
+                ['date' => (new \DateTime('-3 days'))->getTimestamp()],
+            ],
+        );
+
+        self::assertSame(2, $this->extension->getPastTalkCount([$talkA, $talkB]));
+    }
+
+    /**
+     * Create a mock talk with a list of events.
+     */
+    private function createTalk(array $events): ProxySourceItem
+    {
+        $configuration = $this->createMock(Configuration::class);
+        $configuration->method('get')->with($this->identicalTo('events'))->willReturn($events);
+
+        $talk = $this->createMock(ProxySourceItem::class);
+        $talk->method('data')->willReturn($configuration);
+
+        return $talk;
+    }
+}