<?php

namespace Joomla\Registry\Tests\Format;

use Joomla\Registry\Format\Json;
use PHPUnit\Framework\TestCase;

/**
 * Test class for \Joomla\Registry\Format\Json.
 */
class JsonTest extends TestCase
{
    /**
     * @testdox  A data object is converted to a string
     *
     * @covers   \Joomla\Registry\Format\Json
     */
    public function testADataObjectIsConvertedToAString()
    {
        $class = new Json();

        $object               = new \stdClass();
        $object->foo          = 'bar';
        $object->quoted       = '"stringwithquotes"';
        $object->booleantrue  = true;
        $object->booleanfalse = false;
        $object->numericint   = 42;
        $object->numericfloat = 3.1415;

        // A string that looks like a unicode sequence should remain what it is: a string
        $object->unicodesequence = '\u0000';

        // The PHP registry format does not support nested objects
        $object->section      = new \stdClass();
        $object->section->key = 'value';
        $object->array        = ['nestedarray' => ['test1' => 'value1']];

        $string = '{"foo":"bar","quoted":"\"stringwithquotes\"",' .
            '"booleantrue":true,"booleanfalse":false,' .
            '"numericint":42,"numericfloat":3.1415,' .
            '"unicodesequence":"\\\\u0000",' .
            '"section":{"key":"value"},' .
            '"array":{"nestedarray":{"test1":"value1"}}' .
            '}';

        $decoded = json_decode($class->objectToString($object));

        // Ensures that the generated string respects the json syntax
        $errorMsg = 'JSON error decoding string.  Code: ' . json_last_error() . '; Message: ' . json_last_error_msg();

        $this->assertNotNull($decoded, $errorMsg);

        // Test basic object to string.
        $this->assertSame($string, $class->objectToString($object));
    }

    /**
     * @testdox  A string is converted to a data object
     *
     * @covers   \Joomla\Registry\Format\Json
     * @uses     \Joomla\Registry\Factory
     * @uses     \Joomla\Registry\Format\Ini
     */
    public function testAStringIsConvertedToADataObject()
    {
        $class = new Json();

        $string1 = '{"title":"Joomla Framework","author":"Me","params":{"show_title":1,"show_abstract":0,"show_author":1,"categories":[1,2]}}';
        $string2 = "[section]\nfoo=bar";

        $object1                        = new \stdClass();
        $object1->title                 = 'Joomla Framework';
        $object1->author                = 'Me';
        $object1->params                = new \stdClass();
        $object1->params->show_title    = 1;
        $object1->params->show_abstract = 0;
        $object1->params->show_author   = 1;
        $object1->params->categories    = [1, 2];

        $object2               = new \stdClass();
        $object2->section      = new \stdClass();
        $object2->section->foo = 'bar';

        $object3      = new \stdClass();
        $object3->foo = 'bar';

        // Test basic JSON string to object.
        $this->assertEquals(
            $class->stringToObject($string1, ['processSections' => false]),
            $object1,
            'The complex JSON string should convert into the appropriate object.'
        );

        // Test JSON format string without sections.
        $this->assertEquals(
            $class->stringToObject($string2, ['processSections' => false]),
            $object3,
            'The JSON string should convert into an object without sections.'
        );

        // Test JSON format string with sections.
        $this->assertEquals(
            $class->stringToObject($string2, ['processSections' => true]),
            $object2,
            'The JSON string should covert into an object with sections.'
        );
    }

    /**
     * @testdox  A malformed JSON string causes an Exception to be thrown
     *
     * @covers   \Joomla\Registry\Format\Json
     */
    public function testAMalformedJsonStringCausesAnExceptionToBeThrown()
    {
        $this->expectException(\RuntimeException::class);

        (new Json())->stringToObject('{key:\'value\'');
    }

    /**
     * @testdox  Validate data equality in converted objects
     *
     * @covers   \Joomla\Registry\Format\Json
     */
    public function testDataEqualityInConvertedObjects()
    {
        $class = new Json();

        $input  = '{"title":"Joomla Framework","author":"Me","params":{"show_title":1,"show_abstract":0,"show_author":1,"categories":[1,2]}}';
        $object = $class->stringToObject($input);
        $output = $class->objectToString($object);

        $this->assertEquals($input, $output, 'Input and output data must be equal.');
    }

    /**
     * @testdox  Validate an Exception is not thrown when a string is decoded to null and no error is reported
     *
     * @covers   \Joomla\Registry\Format\Json
     */
    public function testExceptionNotThrownWhenDecodedToNullWithoutError()
    {
        $this->assertInstanceOf('stdClass', (new Json())->stringToObject('{}'));
    }
}
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