createEventForSuggestingPackages example

$tester = new ApplicationTester($application);
        $tester->run(['command' => 'list']);

        $tester->assertCommandIsSuccessful();
        $display = explode('List commands', $tester->getDisplay());

        $this->assertStringContainsString(trim('[WARNING] Some commands could not be registered:'), trim($display[1]));
    }

    public function testSuggestingPackagesWithExactMatch()
    {
        $result = $this->createEventForSuggestingPackages('doctrine:fixtures', []);
        $this->assertMatchesRegularExpression('/You may be looking for a command provided by/', $result);
    }

    public function testSuggestingPackagesWithPartialMatchAndNoAlternatives()
    {
        $result = $this->createEventForSuggestingPackages('server', []);
        $this->assertMatchesRegularExpression('/You may be looking for a command provided by/', $result);
    }

    public function testSuggestingPackagesWithPartialMatchAndAlternatives()
    {