github.com/truechain/go-ethereum@v1.8.11/miner/unconfirmed_test.go (about)

     1  // Copyright 2016 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package miner
    18  
    19  import (
    20  	"testing"
    21  
    22  	"github.com/ethereum/go-ethereum/common"
    23  	"github.com/ethereum/go-ethereum/core/types"
    24  )
    25  
    26  // noopHeaderRetriever is an implementation of headerRetriever that always
    27  // returns nil for any requested headers.
    28  type noopHeaderRetriever struct{}
    29  
    30  func (r *noopHeaderRetriever) GetHeaderByNumber(number uint64) *types.Header {
    31  	return nil
    32  }
    33  
    34  // Tests that inserting blocks into the unconfirmed set accumulates them until
    35  // the desired depth is reached, after which they begin to be dropped.
    36  func TestUnconfirmedInsertBounds(t *testing.T) {
    37  	limit := uint(10)
    38  
    39  	pool := newUnconfirmedBlocks(new(noopHeaderRetriever), limit)
    40  	for depth := uint64(0); depth < 2*uint64(limit); depth++ {
    41  		// Insert multiple blocks for the same level just to stress it
    42  		for i := 0; i < int(depth); i++ {
    43  			pool.Insert(depth, common.Hash([32]byte{byte(depth), byte(i)}))
    44  		}
    45  		// Validate that no blocks below the depth allowance are left in
    46  		pool.blocks.Do(func(block interface{}) {
    47  			if block := block.(*unconfirmedBlock); block.index+uint64(limit) <= depth {
    48  				t.Errorf("depth %d: block %x not dropped", depth, block.hash)
    49  			}
    50  		})
    51  	}
    52  }
    53  
    54  // Tests that shifting blocks out of the unconfirmed set works both for normal
    55  // cases as well as for corner cases such as empty sets, empty shifts or full
    56  // shifts.
    57  func TestUnconfirmedShifts(t *testing.T) {
    58  	// Create a pool with a few blocks on various depths
    59  	limit, start := uint(10), uint64(25)
    60  
    61  	pool := newUnconfirmedBlocks(new(noopHeaderRetriever), limit)
    62  	for depth := start; depth < start+uint64(limit); depth++ {
    63  		pool.Insert(depth, common.Hash([32]byte{byte(depth)}))
    64  	}
    65  	// Try to shift below the limit and ensure no blocks are dropped
    66  	pool.Shift(start + uint64(limit) - 1)
    67  	if n := pool.blocks.Len(); n != int(limit) {
    68  		t.Errorf("unconfirmed count mismatch: have %d, want %d", n, limit)
    69  	}
    70  	// Try to shift half the blocks out and verify remainder
    71  	pool.Shift(start + uint64(limit) - 1 + uint64(limit/2))
    72  	if n := pool.blocks.Len(); n != int(limit)/2 {
    73  		t.Errorf("unconfirmed count mismatch: have %d, want %d", n, limit/2)
    74  	}
    75  	// Try to shift all the remaining blocks out and verify emptyness
    76  	pool.Shift(start + 2*uint64(limit))
    77  	if n := pool.blocks.Len(); n != 0 {
    78  		t.Errorf("unconfirmed count mismatch: have %d, want %d", n, 0)
    79  	}
    80  	// Try to shift out from the empty set and make sure it doesn't break
    81  	pool.Shift(start + 3*uint64(limit))
    82  	if n := pool.blocks.Len(); n != 0 {
    83  		t.Errorf("unconfirmed count mismatch: have %d, want %d", n, 0)
    84  	}
    85  }