Testing a new assertion

ec485197b66e-AssertsJsonTest.php

<?php

namespace Tests;

use PHPUnit\Framework\TestCase;
use PHPUnit\Framework\AssertionFailedError;

class AssertsJsonTest extends TestCase
{
    use Assertions\AssertsJson;

    public function testAssertJson()
    {
        $json = json_encode([
            'status' => true,
            'message' => 'Everything is fine'.
        ]);

        $this->assertJsonData($json);
    }

    public function testAssertJsonFailsOnInvalidJson()
    {
        $json = 'this_is_invalid_json';

        $this->expectException(AssertionFailedError::class);

        $this->assertJsonData($json);
    }

    /**
     * @expectedExceptionMessage JSON doesn't contains the status key.
     */
    public function testAssertJsonFailsOnAbsentKeys()
    {
        $json = json_encode([
            'these' => 'are',
            'not' => 'valid keys'
        ]);

        $this->expectException(AssertionFailedError::class);

        $this->assertJsonData($json);
    }

    /**
     * @expectedExceptionMessage The status must be a boolean.
     */
    public function testAssertJsonFailsOnStatusNotBool()
    {
        $json = json_encode([
            'status' => 'ok',
            'message' => 'Everything is fine'.
        ]);

        $this->expectException(AssertionFailedError::class);

        $this->assertJsonData($json);
    }

    /**
     * @expectedExceptionMessage The message should be a string of text.
     */
    public function testAssertJsonFailsOnMessageNotString()
    {
        $json = json_encode([
            'status' => true,
            'message' => ['Everything', 'is', 'fine']
        ]);

        $this->expectException(AssertionFailedError::class);

        $this->assertJsonData($json);
    }

    /**
     * @expectedExceptionMessage The message should not be empty.
     */
    public function testAssertJsonFailsOnMessageEmpty()
    {
        $json = json_encode([
            'status' => true,
            'message' => null
        ]);

        $this->expectException(AssertionFailedError::class);

        $this->assertJsonData($json);
    }
}