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81 - Ensuring Uniqueness

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This commit is contained in:
Adam Wathan
2017-03-13 18:39:22 -04:00
parent caa215e028
commit ed87106e4d
2 changed files with 15 additions and 1 deletions
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4
app/RandomOrderConfirmationNumberGenerator.php
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@@ -6,6 +6,8 @@ class RandomOrderConfirmationNumberGenerator implements OrderConfirmationNumberG
{
public function generate()
{
return str_repeat('A', 24);
$pool = 'ABCDEFGHJKLMNPQRSTUVWXYZ23456789';
return substr(str_shuffle(str_repeat($pool, 24)), 0, 24);
}
}

12
tests/unit/RandomOrderConfirmationNumberGeneratorTest.php
View File

@@ -47,4 +47,16 @@ class RandomOrderConfirmationNumberGeneratorTest extends TestCase
$this->assertFalse(strpos($confirmationNumber, '0'));
$this->assertFalse(strpos($confirmationNumber, 'O'));
}
/** @test */
function confirmation_numbers_must_be_unique()
{
$generator = new RandomOrderConfirmationNumberGenerator;
$confirmationNumbers = array_map(function ($i) use ($generator) {
return $generator->generate();
}, range(1, 100));
$this->assertCount(100, array_unique($confirmationNumbers));
}
}