<?php

use MediaWiki\Config\ConfigException;
use MediaWiki\Config\HashConfig;

/**
 * @covers \MediaWiki\Config\HashConfig
 */
class HashConfigTest extends \MediaWikiUnitTestCase {

	public function testNewInstance() {
		$conf = HashConfig::newInstance();
		$this->assertInstanceOf( HashConfig::class, $conf );
	}

	public function testConstructor() {
		$conf = new HashConfig();
		$this->assertInstanceOf( HashConfig::class, $conf );

		// Test passing arguments to the constructor
		$conf2 = new HashConfig( [
			'one' => '1',
		] );
		$this->assertSame( '1', $conf2->get( 'one' ) );
	}

	public function testGet() {
		$conf = new HashConfig( [
			'one' => '1',
		] );
		$this->assertSame( '1', $conf->get( 'one' ) );
		$this->expectException( ConfigException::class );
		$this->expectExceptionMessage( 'HashConfig::get: undefined option' );
		$conf->get( 'two' );
	}

	public function testHas() {
		$conf = new HashConfig( [
			'one' => '1',
		] );
		$this->assertTrue( $conf->has( 'one' ) );
		$this->assertFalse( $conf->has( 'two' ) );
	}

	public function testClear() {
		$conf = new HashConfig( [
			'one' => '1',
		] );
		$this->assertTrue( $conf->has( 'one' ) );

		$conf->clear();
		$this->assertFalse( $conf->has( 'one' ) );
	}

	public function testSet() {
		$conf = new HashConfig( [
			'one' => '1',
		] );
		$conf->set( 'two', '2' );
		$this->assertSame( '2', $conf->get( 'two' ) );
		// Check that set overwrites
		$conf->set( 'one', '3' );
		$this->assertSame( '3', $conf->get( 'one' ) );
	}

	public function testGetNames() {
		$conf = new HashConfig( [
			'one' => '1',
		] );
		$conf->set( 'two', '2' );

		$this->assertSame( [ 'one', 'two' ], $conf->getNames() );
	}

	public function testTraversable() {
		$conf = new HashConfig( [
			'one' => '1',
		] );
		$conf->set( 'two', '2' );

		$actual = [];
		foreach ( $conf as $name => $value ) {
			$actual[$name] = $value;
		}

		$this->assertSame( [ 'one' => '1', 'two' => '2' ], $actual );
	}
}
