UsageTrackingFormTypeExtension example

private UsageTrackingFormTypeExtension $extension1;
    private UsageTrackingFormTypeExtension $extension2;
    private ResolvedFormType $parentResolvedType;
    private ResolvedFormType $resolvedType;
    private FormFactory $formFactory;

    protected function setUp(): void
    {
        $this->calls = [];
        $this->parentType = new UsageTrackingParentFormType($this->calls);
        $this->type = new UsageTrackingFormType($this->calls);
        $this->extension1 = new UsageTrackingFormTypeExtension($this->calls, ['c' => 'c_default']);
        $this->extension2 = new UsageTrackingFormTypeExtension($this->calls, ['d' => 'd_default']);
        $this->parentResolvedType = new ResolvedFormType($this->parentType);
        $this->resolvedType = new ResolvedFormType($this->type, [$this->extension1, $this->extension2], $this->parentResolvedType);
        $this->formFactory = new FormFactory(new FormRegistry([], new ResolvedFormTypeFactory()));
    }

    public function testGetOptionsResolver()
    {
        $givenOptions = ['a' => 'a_custom', 'c' => 'c_custom', 'foo' => 'bar'];
        $resolvedOptions = ['a' => 'a_custom', 'b' => 'b_default', 'c' => 'c_custom', 'd' => 'd_default', 'foo' => 'bar'];