# Copyright (c) Microsoft Corporation.
# Licensed under the MIT License.

import unittest

import onnx.helper

import onnxscript.testing
from onnxscript import script
from onnxscript.onnx_opset import opset15 as op
from onnxscript.onnx_types import FLOAT


class TestConverter(unittest.TestCase):
    def test_plus_op(self):
        """Test that + is translated to Add op."""

        @script(default_opset=op)
        def plus1(x, y):
            return x + y

        @script()
        def plus2(x, y):
            return op.Add(x, y)

        onnxscript.testing.assert_isomorphic_function(plus1, plus2)

    def test_const_promotion(self):
        """Test promotion of constant literals to TensorProto."""

        @script()
        def explicit_plus1(A: FLOAT["N"]) -> FLOAT["N"]:  # noqa: F821
            one = op.Constant(value=onnx.helper.make_tensor("one", 1, [], [1.0]))
            one_cast = op.CastLike(one, A)
            return op.Add(A, one_cast)

        @script()
        def implicit_plus1(A: FLOAT["N"]) -> FLOAT["N"]:  # noqa: F821
            return op.Add(A, 1.0)

        onnxscript.testing.assert_isomorphic_function(explicit_plus1, implicit_plus1)


if __name__ == "__main__":
    unittest.main()