<?php

namespace SMW\Tests\Query;

use SMW\Query\QueryComparator;

/**
 * @covers \SMW\Query\QueryComparator
 * @group semantic-mediawiki
 *
 * @license GPL-2.0-or-later
 * @since 2.3
 *
 * @author mwjames
 */
class QueryComparatorTest extends \PHPUnit\Framework\TestCase {

	public function testCanConstruct() {
		$comparatorList = '';

		$this->assertInstanceOf(
			'\SMW\Query\QueryComparator',
			new QueryComparator( $comparatorList, false )
		);

		$this->assertInstanceOf(
			'\SMW\Query\QueryComparator',
			QueryComparator::getInstance()
		);
	}

	/**
	 * @dataProvider stringComparatorProvider
	 */
	public function testGetComparatorFromString( $stringComparator, $expected ) {
		$comparatorList = '';

		$instance = new QueryComparator( $comparatorList, false );

		$this->assertEquals(
			$expected,
			$instance->getComparatorFromString( $stringComparator )
		);
	}

	/**
	 * @dataProvider stringComparatorProvider
	 */
	public function testGetStringForComparator( $stringComparator, $comparator ) {
		$comparatorList = '';

		$instance = new QueryComparator( $comparatorList, false );

		$this->assertEquals(
			$stringComparator,
			$instance->getStringForComparator( $comparator )
		);
	}

	/**
	 * @dataProvider extractStringComparatorProvider
	 */
	public function testExtractComparatorFromString( $string, $expectedString, $expectedComparator ) {
		$comparatorList = '';

		$instance = new QueryComparator( $comparatorList, true );

		$this->assertEquals(
			$expectedComparator,
			$instance->extractComparatorFromString( $string )
		);

		$this->assertEquals(
			$expectedString,
			$string
		);
	}

	/**
	 * @dataProvider containsComparatorProvider
	 */
	public function testContainsComparator( $string, $comparator, $expected ) {
		$comparatorList = '';

		$instance = new QueryComparator( $comparatorList, true );

		$this->assertEquals(
			$expected,
			$instance->containsComparator( $string, $comparator )
		);
	}

	public function stringComparatorProvider() {
		$provider[] = [
			'!~',
			SMW_CMP_NLKE
		];

		return $provider;
	}

	public function extractStringComparatorProvider() {
		$provider[] = [
			'!~Foo',
			'Foo',
			SMW_CMP_NLKE
		];

		$provider[] = [
			'<Foo',
			'Foo',
			SMW_CMP_LESS
		];

		$provider[] = [
			'like:Foo',
			'Foo',
			SMW_CMP_PRIM_LIKE
		];

		$provider[] = [
			'nlike:Foo',
			'Foo',
			SMW_CMP_PRIM_NLKE
		];

		return $provider;
	}

	public function containsComparatorProvider() {
		$provider[] = [
			'~someThing',
			SMW_CMP_EQ,
			false
		];

		$provider[] = [
			'someThing',
			SMW_CMP_EQ,
			true
		];

		$provider[] = [
			'!~someThing',
			SMW_CMP_NLKE,
			true
		];

		$provider[] = [
			'!~someThing',
			SMW_CMP_LIKE,
			false
		];

		$provider[] = [
			'>>someThing',
			SMW_CMP_LESS,
			false
		];

		$provider[] = [
			'<<someThing',
			SMW_CMP_LESS,
			true
		];

		$provider[] = [
			'like:someThing',
			SMW_CMP_PRIM_LIKE,
			true
		];

		$provider[] = [
			'nlike:someThing',
			SMW_CMP_PRIM_NLKE,
			true
		];

		return $provider;
	}

}