# Copyright (c) ONNX Project Contributors
#
# SPDX-License-Identifier: Apache-2.0
from __future__ import annotations

import numpy as np

import onnx
from onnx.backend.test.case.base import Base
from onnx.backend.test.case.node import expect


class Shrink(Base):
    @staticmethod
    def export_hard_shrink() -> None:
        node = onnx.helper.make_node(
            "Shrink",
            inputs=["x"],
            outputs=["y"],
            lambd=1.5,
        )
        X = np.arange(-2.0, 2.1, dtype=np.float32)
        Y = np.array([-2, 0, 0, 0, 2], dtype=np.float32)
        expect(node, inputs=[X], outputs=[Y], name="test_shrink_hard")

    @staticmethod
    def export_soft_shrink() -> None:
        node = onnx.helper.make_node(
            "Shrink",
            inputs=["x"],
            outputs=["y"],
            lambd=1.5,
            bias=1.5,
        )
        X = np.arange(-2.0, 2.1, dtype=np.float32)
        Y = np.array([-0.5, 0, 0, 0, 0.5], dtype=np.float32)
        expect(node, inputs=[X], outputs=[Y], name="test_shrink_soft")