Add phpunit for get_localtax_by_third

test/phpunit/FunctionsLibTest.php

@@ -1168,7 +1168,7 @@ class FunctionsLibTest extends PHPUnit\Framework\TestCase
 	}
 
 	/**
-	 * testGetDefaultTva
+	 * testGetDefaultLocalTax
 	 *
 	 * @return	void
 	 */
@@ -1255,6 +1255,27 @@ class FunctionsLibTest extends PHPUnit\Framework\TestCase
 	}
 
 
+	/**
+	 * testGetLocalTaxByThird
+	 *
+	 * @return	void
+	 */
+	public function testGetLocalTaxByThird()
+	{
+		global $mysoc;
+
+		$mysoc->country_code = 'ES';
+
+		$result = get_localtax_by_third(1);
+		print __METHOD__." result=".$result."\n";
+		$this->assertEquals('5.2', $result);
+
+		$result = get_localtax_by_third(2);
+		print __METHOD__." result=".$result."\n";
+		$this->assertEquals('-19:-15:-9', $result);
+	}
+
+
 	/**
 	 * testDolExplodeIntoArray
 	 *