Initial SQLite development (#1)

Reviewed-on: #1

tests/unit/OpTest.php

@@ -0,0 +1,67 @@
+<?php declare(strict_types=1);
+
+namespace Test\Unit;
+
+use BitBadger\PDODocument\Op;
+use PHPUnit\Framework\Attributes\TestDox;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Unit tests for the Op enumeration
+ */
+class OpTest extends TestCase
+{
+    #[TestDox('To string succeeds for EQ')]
+    public function testToStringSucceedsForEQ(): void
+    {
+        $this->assertEquals('=', Op::EQ->toString(), 'EQ operator incorrect');
+    }
+
+    #[TestDox('To string succeeds for GT')]
+    public function testToStringSucceedsForGT(): void
+    {
+        $this->assertEquals('>', Op::GT->toString(), 'GT operator incorrect');
+    }
+
+    #[TestDox('To string succeeds for GE')]
+    public function testToStringSucceedsForGE(): void
+    {
+        $this->assertEquals('>=', Op::GE->toString(), 'GE operator incorrect');
+    }
+
+    #[TestDox('To string succeeds for LT')]
+    public function testToStringSucceedsForLT(): void
+    {
+        $this->assertEquals('<', Op::LT->toString(), 'LT operator incorrect');
+    }
+
+    #[TestDox('To string succeeds for LE')]
+    public function testToStringSucceedsForLE(): void
+    {
+        $this->assertEquals('<=', Op::LE->toString(), 'LE operator incorrect');
+    }
+
+    #[TestDox('To string succeeds for NE')]
+    public function testToStringSucceedsForNE(): void
+    {
+        $this->assertEquals('<>', Op::NE->toString(), 'NE operator incorrect');
+    }
+
+    #[TestDox('To string succeeds for BT')]
+    public function testToStringSucceedsForBT(): void
+    {
+        $this->assertEquals('BETWEEN', Op::BT->toString(), 'BT operator incorrect');
+    }
+
+    #[TestDox('To string succeeds for EX')]
+    public function testToStringSucceedsForEX(): void
+    {
+        $this->assertEquals('IS NOT NULL', Op::EX->toString(), 'EX operator incorrect');
+    }
+
+    #[TestDox('To string succeeds for NEX')]
+    public function testToStringSucceedsForNEX(): void
+    {
+        $this->assertEquals('IS NULL', Op::NEX->toString(), 'NEX operator incorrect');
+    }
+}