Initial SQLite development (#1)

Reviewed-on: #1

tests/unit/ConfigurationTest.php

@@ -0,0 +1,39 @@
+<?php declare(strict_types=1);
+
+namespace Test\Unit;
+
+use BitBadger\PDODocument\{Configuration, DocumentException};
+use PHPUnit\Framework\Attributes\TestDox;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Unit tests for the Configuration class
+ */
+class ConfigurationTest extends TestCase
+{
+    #[TestDox('ID field default succeeds')]
+    public function testIdFieldDefaultSucceeds(): void
+    {
+        $this->assertEquals('id', Configuration::$idField, 'Default ID field should be "id"');
+    }
+
+    #[TestDox('ID field change succeeds')]
+    public function testIdFieldChangeSucceeds()
+    {
+        try {
+            Configuration::$idField = 'EyeDee';
+            $this->assertEquals('EyeDee', Configuration::$idField, 'ID field should have been updated');
+        } finally {
+            Configuration::$idField = 'id';
+            $this->assertEquals('id', Configuration::$idField, 'Default ID value should have been restored');
+        }
+    }
+
+    #[TestDox("Db conn fails when no DSN specified")]
+    public function testDbConnFailsWhenNoDSNSpecified(): void
+    {
+        $this->expectException(DocumentException::class);
+        Configuration::$pdoDSN = '';
+        Configuration::dbConn();
+    }
+}