Error asserting a float in JSON with PHPUnit - php

Question

Context : I created an app with Symfony and API Platform and I'm writing tests for the API
I have a property name "cost" which is a float in my entity:
#[ApiResource()]
class MyEntity {
...
#[ORM\Column(nullable: true)]
private ?float $cost = null;
..
}
This property is stored as "double precision" in my Postgres DB (which is managed by Doctrine).
This entity as an API endpoint generated by API Platform.
I wrote test to check if the values are correct:
public function testGetSingleMyEntity(): void
{
...
$client->request('GET', '/api/my_entity/'.$myentity->getId());
$this->assertJsonContains([
"cost" => $myentity->getCost()
]);
...
}
But when I run the test, I have this error:
3) App\Tests\Api\MyEntityTest::testGetSingleMyEntity
Failed asserting that an array has the subset Array &0 (
'cost' => 25.0
--- Expected
+++ Actual
## ##
- 'cost' => 25.0,
+ 'cost' => 25,
I tried casting the value of cost with (float) or floatval but I doesn't change anything as it's already a float.
I don't understand if it's a type formatting error from API Platform or because I made an error?
I would really appreciate if someone could tell me what's the issue here.
Thanks

Answer 1

To fix the issue I had to change the type of the property cost to "decimal". It's now stored as a numeric(10,2) into the DB and handled as a string in PHP :
#[ApiResource()]
class MyEntity {
...
#[ORM\Column(type: "decimal", precision: 10, scale: 2, nullable: true)]
private ?string $cost = null;
public function getCost(): ?string
{
return $this->cost;
}
public function setCost(?string $cost): self
{
$this->cost = $cost;
return $this;
}
...
}