import pytest

from image_prediction.compositor.compositor import TransformerCompositor
from image_prediction.formatter.formatters.camel_case import Snake2CamelCaseKeyFormatter
from image_prediction.formatter.formatters.enum import EnumFormatter
from image_prediction.formatter.formatters.identity import IdentityFormatter
from image_prediction.info import Info
from test.utils.comparison import transform_equal


def test_identity(metadata):
    compositor = TransformerCompositor(IdentityFormatter())
    assert transform_equal(compositor(metadata), metadata)


def test_composition(metadata, metadata_formatted):
    compositor = TransformerCompositor(IdentityFormatter(), EnumFormatter())
    assert transform_equal(compositor(metadata), metadata_formatted)


@pytest.fixture()
def compositor_test_enum_metadata():
    return [{Info.WIDTH: 100, Info.PAGE_WIDTH: 200}]


@pytest.fixture()
def compositor_test_camel_case_metadata():
    return [{"width": 100, "pageWidth": 200}]


def test_enum_to_camel_case(compositor_test_enum_metadata, compositor_test_camel_case_metadata):
    compositor = TransformerCompositor(EnumFormatter(), Snake2CamelCaseKeyFormatter())
    assert transform_equal(compositor(compositor_test_enum_metadata), compositor_test_camel_case_metadata)