# Copyright (c) 2021 Graphcore Ltd. All rights reserved.
import popxl
import popxl.ops as ops

import popart._internal.ir as _ir

from utils import contains_op_of_type


class TestMul:
    def test_fn(self):
        ir = popxl.Ir()
        g = ir.main_graph

        with g:
            a = popxl.variable(1)
            b = popxl.variable(2)
            _ = ops.mul(a, b)
        assert len(g.tensors) == 3
        assert len(g.variables) == 2
        assert contains_op_of_type("Mul", _ir.op.MulOp, g)

    def test_dunder(self):
        ir = popxl.Ir()
        g = ir.main_graph

        with g:
            a = popxl.variable(1)
            b = popxl.variable(2)
            _ = a * b
        assert len(g.tensors) == 3
        assert len(g.variables) == 2
        assert contains_op_of_type("Mul", _ir.op.MulOp, g)

    def test_ensure_tensor(self):
        ir = popxl.Ir()
        g = ir.main_graph

        with g:
            a = popxl.variable(1)
            _ = a * 2
        assert len(g.tensors) == 3
        assert len(g.variables) == 1
        assert len(g.constants) == 1
        assert contains_op_of_type("Mul", _ir.op.MulOp, g)

    def test_ensure_tensor_lhs(self):
        ir = popxl.Ir()
        g = ir.main_graph

        with g:
            a = popxl.variable(1)
            _ = 2 * a
        assert len(g.tensors) == 3
        assert len(g.variables) == 1
        assert len(g.constants) == 1
        assert contains_op_of_type("Mul", _ir.op.MulOp, g)