Rename custom module directories

- Rename `opdavies_blog` to `blog`.
- Rename `opdavies_blog_test` to `blog_test`.
- Rename `opdavies_talks` to `talks`.
- Rename `opdavies_talks_test` to `talks_test`.

The files within the directories haven't changed, so there is no
breaking change caused by renaming the directories.

 Please enter the commit message for your changes. Lines starting

web/modules/custom/talks/tests/src/Kernel/CountPreviousTalksTest.php

@@ -0,0 +1,66 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace Drupal\Tests\opdavies_talks\Kernel;
+
+use Carbon\Carbon;
+use Drupal\node\NodeInterface;
+use Drupal\opdavies_talks\Service\TalkCounter;
+use PHPUnit\Framework\Assert;
+
+class CountPreviousTalksTest extends TalksTestBase {
+
+  private TalkCounter $talkCounter;
+
+  /** @test */
+  public function previous_talks_are_counted(): void {
+    $this->createTalk([
+      'field_events' => [
+        $this->createEvent(),
+        $this->createEvent(),
+      ],
+    ]);
+
+    $this->createTalk([
+      'field_events' => [
+        $this->createEvent(),
+      ],
+    ]);
+
+    Assert::assertSame(3, $this->talkCounter->getCount());
+  }
+
+  /** @test */
+  public function future_talks_are_not_counted(): void {
+    $this->createTalk([
+      'field_events' => [
+        $this->createEvent([
+          'field_date' => Carbon::now()->subDay(),
+        ]),
+        $this->createEvent([
+          'field_date' => Carbon::now()->addDay(),
+        ]),
+      ],
+    ]);
+
+    Assert::assertSame(1, $this->talkCounter->getCount());
+  }
+
+  /** @test */
+  public function unpublished_talks_are_not_counted(): void {
+    $this->createTalk([
+      'field_events' => [$this->createEvent()],
+      'status' => NodeInterface::NOT_PUBLISHED,
+    ]);
+
+    Assert::assertSame(0, $this->talkCounter->getCount());
+  }
+
+  protected function setUp() {
+    parent::setUp();
+
+    $this->talkCounter = $this->container->get(TalkCounter::class);
+  }
+
+}