added alias tests

Author: transistive

tests/AliasTest.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace WikibaseSolutions\CypherDSL\Tests;
+
+use PHPUnit\Framework\TestCase;
+use WikibaseSolutions\CypherDSL\Alias;
+use WikibaseSolutions\CypherDSL\Tests\Unit\TestHelper;
+use WikibaseSolutions\CypherDSL\Variable;
+
+class AliasTest extends TestCase
+{
+    use TestHelper;
+
+    private Alias $alias;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->alias = new Alias(
+            $this->getQueryConvertableMock(Variable::class, "a"),
+            $this->getQueryConvertableMock(Variable::class, "b")
+        );
+    }
+
+    public function testToQuery(): void
+    {
+        $this->assertSame("a AS b", $this->alias->toQuery());
+    }
+
+    public function testGetOriginal(): void
+    {
+        $this->assertEquals($this->getQueryConvertableMock(Variable::class, "a"), $this->alias->getOriginal());
+    }
+
+    public function testGetVariable(): void
+    {
+        $this->assertEquals($this->getQueryConvertableMock(Variable::class, "b"), $this->alias->getVariable());
+    }
+}