class ModelWithDatetimeField(BaseModel):
        dt_field: datetime

        @field_serializer("dt_field")
        def serialize_datetime(self, dt_field: datetime):
            return dt_field.replace(microsecond=0, tzinfo=timezone.utc).isoformat()

    app = FastAPI()
    model = ModelWithDatetimeField(dt_field=datetime(2019, 1, 1, 8))

    @app.get("/model", response_model=ModelWithDatetimeField)

        class Config:
            pass

    model = ModelWithCustomEncoder(dt_field=datetime(2019, 1, 1, 8))
    assert jsonable_encoder(model) == {"dt_field": "2019-01-01T08:00:00+00:00"}
    subclass_model = ModelWithCustomEncoderSubclass(dt_field=datetime(2019, 1, 1, 8))
    assert jsonable_encoder(subclass_model) == {"dt_field": "2019-01-01T08:00:00+00:00"}


def test_encode_model_with_config():

import javassist.CtClass
import javassist.CtField

/**
 * Matches Kotlin <code>internal</code> members.
 */
class KotlinInternalFilter implements ClassFilter, FieldFilter, BehaviorFilter {

    @Override
    boolean matches(CtClass ctClass) {
        return KotlinMetadataQueries.INSTANCE.isKotlinInternal(ctClass)
    }

    @Override
    boolean matches(CtField ctField) {

              $context_receiver_0: GET_FIELD 'FIELD FIELD_FOR_CLASS_CONTEXT_RECEIVER name:contextReceiverField0 type:<root>.Ctx1 visibility:private [final] declared in <root>.Test' type=<root>.Ctx1 origin=null
                receiver: GET_VAR 'p0: <root>.Test declared in <root>.CodeFragment.run' type=<root>.Test origin=null

              $context_receiver_0: GET_FIELD 'FIELD FIELD_FOR_CLASS_CONTEXT_RECEIVER name:contextReceiverField0 type:<root>.Ctx1 visibility:private [final] declared in <root>.Test' type=<root>.Ctx1 origin=null
                receiver: GET_VAR 'p0: <root>.Test declared in <root>.CodeFragment.run' type=<root>.Test origin=null

                }
            }
        }

        if (member instanceof JApiField) {

            JApiField field = (JApiField) member
            CtField oldField = field.oldFieldOptional.get()
            CtField newField = field.newFieldOptional.get()

            def oldNullability = hasNullableAnnotation(oldField)
            def newNullability = hasNullableAnnotation(newField)

import gradlebuild.binarycompatibility.intValue
import gradlebuild.binarycompatibility.stringArrayValue
import gradlebuild.binarycompatibility.stringValue
import javassist.CtClass
import javassist.CtConstructor
import javassist.CtField
import javassist.CtMember
import javassist.CtMethod
import javassist.Modifier
import javassist.bytecode.annotation.Annotation
import javassist.bytecode.annotation.AnnotationImpl
import kotlinx.metadata.Flag

          BLOCK type=kotlin.Int origin=null
            CALL 'public final fun useWithCtx1 ($context_receiver_0: <root>.Ctx1): kotlin.Int declared in <root>.ContextKt' type=kotlin.Int origin=null
              $context_receiver_0: GET_FIELD 'FIELD FIELD_FOR_CLASS_CONTEXT_RECEIVER name:contextReceiverField0 type:<root>.Ctx1 visibility:private [final] declared in <root>.Test' type=<root>.Ctx1 origin=null

          BLOCK type=kotlin.Int origin=null
            CALL 'public final fun useWithCtx2 ($context_receiver_0: <root>.Ctx2): kotlin.Int declared in <root>.ContextKt' type=kotlin.Int origin=null
              $context_receiver_0: GET_FIELD 'FIELD FIELD_FOR_CLASS_CONTEXT_RECEIVER name:contextReceiverField1 type:<root>.Ctx2 visibility:private [final] declared in <root>.Test' type=<root>.Ctx2 origin=null

	cm, ok := obj.(*v1.ConfigMap)
	if !ok {
		scope.Warnf("expected configmap, but received %v, discarding", obj)
		return
	}
	rptStr := cm.Data[dataField]
	scope.Debugf("using report: %s", rptStr)
	dr, err := ReportFromYaml([]byte(cm.Data[dataField]))
	if err != nil {
		scope.Warnf("received malformed distributionReport %s, discarding: %v", cm.Name, err)
		return
	}
	drh.dc.handleReport(dr)
}