Finish implementing SqliteGateway

tests/Gateways/SqliteGatewayTest.php

@@ -10,9 +10,15 @@ use PHPUnit\Framework\TestCase;
 
 class SqliteGatewayTest extends TestCase
 {
+    private SqliteGateway $gateway;
+
+    protected function setUp(): void
+    {
+        $this->gateway = new SqliteGateway(":memory:");
+    }
+
     public function testCanInsertAWebmention()
     {
-        $gateway = new SqliteGateway(":memory:");
 
         $webmention = new Webmention(
             null,
@@ -22,13 +28,13 @@ class SqliteGatewayTest extends TestCase
             "Some Author Name"
         );
 
-        $webmention->id = $gateway->save($webmention);
+        $webmention->id = $this->gateway->save($webmention);
         $this->assertNotNull($webmention->id);
     }
 
     public function testCanRetrieveAWebmention()
     {
-        $gateway = new SqliteGateway(":memory:");
+        $this->gateway = new SqliteGateway(":memory:");
 
         $webmention = new Webmention(
             null,
@@ -38,10 +44,59 @@ class SqliteGatewayTest extends TestCase
             "Some Author Name"
         );
 
-        $webmention->id = $gateway->save($webmention);
+        $webmention->id = $this->gateway->save($webmention);
 
-        $retrieved = $gateway->get($webmention->id);
+        $retrieved = $this->gateway->get($webmention->id);
 
-        $this->assertEquals($webmention, $retrieved, ((string) $webmention). " " . ((string) $retrieved));
+        $this->assertEquals($webmention, $retrieved);
+    }
+
+    public function testCanDeleteAWebmention()
+    {
+        $this->gateway = new SqliteGateway(":memory:");
+
+        $webmention = new Webmention(
+            null,
+            "https://lewisdale.dev/post/a-post",
+            "https://a-source.url",
+            "No content",
+            "Some Author Name"
+        );
+
+        $webmention->id = $this->gateway->save($webmention);
+        $this->gateway->delete($webmention);
+
+        $retrieved = $this->gateway->get($webmention->id);
+
+        $this->assertNull($retrieved);
+    }
+
+    public function testCanGetByPost()
+    {
+        $this->gateway = new SqliteGateway(":memory:");
+
+        foreach(range(0, 4) as $_) {
+            $this->gateway->save(new Webmention(
+                null,
+                "https://lewisdale.dev/post/a-new-post",
+                "https://a-source.url",
+                "No content",
+                "Some Author Name"
+            ));
+        }
+
+        foreach(range(0, 4) as $_) {
+            $this->gateway->save(new Webmention(
+                null,
+                "https://lewisdale.dev/post/a-different-post",
+                "https://a-source.url",
+                "No content",
+                "Some Author Name"
+            ));
+        }
+
+        $mentions = $this->gateway->getByPost("https://lewisdale.dev/post/a-new-post");
+
+        $this->assertCount(5, $mentions);
     }
 }