github.com/MetalBlockchain/subnet-evm@v0.4.9/core/block_validator_test.go (about)

     1  // (c) 2019-2021, Ava Labs, Inc.
     2  //
     3  // This file is a derived work, based on the go-ethereum library whose original
     4  // notices appear below.
     5  //
     6  // It is distributed under a license compatible with the licensing terms of the
     7  // original code from which it is derived.
     8  //
     9  // Much love to the original authors for their work.
    10  // **********
    11  // Copyright 2015 The go-ethereum Authors
    12  // This file is part of the go-ethereum library.
    13  //
    14  // The go-ethereum library is free software: you can redistribute it and/or modify
    15  // it under the terms of the GNU Lesser General Public License as published by
    16  // the Free Software Foundation, either version 3 of the License, or
    17  // (at your option) any later version.
    18  //
    19  // The go-ethereum library is distributed in the hope that it will be useful,
    20  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    21  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    22  // GNU Lesser General Public License for more details.
    23  //
    24  // You should have received a copy of the GNU Lesser General Public License
    25  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    26  
    27  package core
    28  
    29  import (
    30  	"testing"
    31  )
    32  
    33  func TestCalcGasLimit(t *testing.T) {
    34  	for i, tc := range []struct {
    35  		pGasLimit uint64
    36  		max       uint64
    37  		min       uint64
    38  	}{
    39  		{20000000, 20019530, 19980470},
    40  		{40000000, 40039061, 39960939},
    41  	} {
    42  		// Increase
    43  		if have, want := CalcGasLimit(0, tc.pGasLimit, 2*tc.pGasLimit, 2*tc.pGasLimit), tc.max; have != want {
    44  			t.Errorf("test %d: have %d want <%d", i, have, want)
    45  		}
    46  		// Decrease
    47  		if have, want := CalcGasLimit(0, tc.pGasLimit, 0, 0), tc.min; have != want {
    48  			t.Errorf("test %d: have %d want >%d", i, have, want)
    49  		}
    50  		// Small decrease
    51  		if have, want := CalcGasLimit(0, tc.pGasLimit, tc.pGasLimit-1, tc.pGasLimit-1), tc.pGasLimit-1; have != want {
    52  			t.Errorf("test %d: have %d want %d", i, have, want)
    53  		}
    54  		// Small increase
    55  		if have, want := CalcGasLimit(0, tc.pGasLimit, tc.pGasLimit+1, tc.pGasLimit+1), tc.pGasLimit+1; have != want {
    56  			t.Errorf("test %d: have %d want %d", i, have, want)
    57  		}
    58  		// No change
    59  		if have, want := CalcGasLimit(0, tc.pGasLimit, tc.pGasLimit, tc.pGasLimit), tc.pGasLimit; have != want {
    60  			t.Errorf("test %d: have %d want %d", i, have, want)
    61  		}
    62  	}
    63  }