mirror of
https://gitlab.com/pulsechaincom/erigon-pulse.git
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190bc9dfd8
Implement https://github.com/ethereum/EIPs/pull/7062 and https://github.com/ethereum/EIPs/pull/7095. Pick up https://github.com/ledgerwatch/erigon-lib/pull/1006.
60 lines
1.8 KiB
Go
60 lines
1.8 KiB
Go
// Copyright 2022 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package misc
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import (
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"testing"
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"github.com/holiman/uint256"
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)
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func TestFakeExponential(t *testing.T) {
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var tests = []struct {
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factor, num, denom uint64
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want uint64
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}{
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// When num==0 the return value should always equal the value of factor
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{1, 0, 1, 1},
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{38493, 0, 1000, 38493},
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{0, 1234, 2345, 0}, // should be 0
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{1, 2, 1, 6}, // approximate 7.389
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{1, 4, 2, 6},
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{1, 3, 1, 16}, // approximate 20.09
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{1, 6, 2, 18},
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{1, 4, 1, 49}, // approximate 54.60
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{1, 8, 2, 50},
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{10, 8, 2, 542}, // approximate 540.598
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{11, 8, 2, 596}, // approximate 600.58
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{1, 5, 1, 136}, // approximate 148.4
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{1, 5, 2, 11}, // approximate 12.18
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{2, 5, 2, 23}, // approximate 24.36
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}
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for _, tt := range tests {
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factor := uint256.NewInt(tt.factor)
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denom := uint256.NewInt(tt.denom)
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result, err := FakeExponential(factor, denom, tt.num)
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if err != nil {
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t.Error(err)
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}
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//t.Logf("%v*e^(%v/%v): %v", factor, num, denom, result)
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if tt.want != result.ToBig().Uint64() {
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t.Errorf("got %v want %v", result, tt.want)
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}
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}
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}
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