61 lines
2.0 KiB
Go
61 lines
2.0 KiB
Go
// Copyright 2023 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 internal
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import (
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"testing"
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"github.com/ethereum/go-ethereum/core/vm"
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)
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func TestMemCopying(t *testing.T) {
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for i, tc := range []struct {
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memsize int64
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offset int64
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size int64
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wantErr string
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wantSize int
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}{
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{0, 0, 100, "", 100}, // Should pad up to 100
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{0, 100, 0, "", 0}, // No need to pad (0 size)
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{100, 50, 100, "", 100}, // Should pad 100-150
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{100, 50, 5, "", 5}, // Wanted range fully within memory
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{100, -50, 0, "offset or size must not be negative", 0}, // Error
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{0, 1, 1024*1024 + 1, "reached limit for padding memory slice: 1048578", 0}, // Error
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{10, 0, 1024*1024 + 100, "reached limit for padding memory slice: 1048666", 0}, // Error
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} {
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mem := vm.NewMemory()
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mem.Resize(uint64(tc.memsize))
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cpy, err := GetMemoryCopyPadded(mem.Data(), tc.offset, tc.size)
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if want := tc.wantErr; want != "" {
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if err == nil {
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t.Fatalf("test %d: want '%v' have no error", i, want)
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}
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if have := err.Error(); want != have {
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t.Fatalf("test %d: want '%v' have '%v'", i, want, have)
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}
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continue
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}
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if err != nil {
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t.Fatalf("test %d: unexpected error: %v", i, err)
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}
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if want, have := tc.wantSize, len(cpy); have != want {
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t.Fatalf("test %d: want %v have %v", i, want, have)
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}
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}
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}
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