110 lines
2.8 KiB
Python
110 lines
2.8 KiB
Python
# standard imports
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import os
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import logging
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# external imports
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from hexathon import add_0x
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# local imports
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from chainsyncer.driver.history import HistorySyncer
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from chainsyncer.error import NoBlockForYou
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logg = logging.getLogger().getChild(__name__)
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class MockConn:
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"""Noop connection mocker.
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:param o: Object to execute rpc call for
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:type o: dict
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"""
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def do(self, o):
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pass
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class MockTx:
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"""Minimal mocked tx object.
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:param index: Transaction index in block
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:type index: int
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:param tx_hash: Transaction hash
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:type tx_hash: str
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"""
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def __init__(self, index, tx_hash):
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self.hash = tx_hash
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self.index = index
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def apply_receipt(self, rcpt):
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"""Save receipt source in mock tx object.
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:param rcpt: Transaction receipt
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:type rcpt: dict
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"""
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self.rcpt = rcpt
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class MockBlock:
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def __init__(self, number, txs):
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"""Minimal mocked block object.
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:param number: Block number
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:type number: int
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:param txs: Transaction list to include in block
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:type txs: list
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"""
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self.number = number
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self.txs = txs
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def tx(self, i):
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"""Get block transaction at given index.
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:param i: Transaction index
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:type i: int
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"""
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return MockTx(i, self.txs[i])
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class TestSyncer(HistorySyncer):
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"""Unittest extension of history syncer driver.
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:param backend: Syncer backend
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:type backend: chainsyncer.backend.base.Backend implementation
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:param chain_interface: Chain interface
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:type chain_interface: chainlib.interface.ChainInterface implementation
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:param tx_counts: List of integer values defining how many mock transactions to generate per block. Mock blocks will be generated for each element in list.
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:type tx_counts: list
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"""
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def __init__(self, backend, chain_interface, tx_counts=[]):
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self.tx_counts = tx_counts
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super(TestSyncer, self).__init__(backend, chain_interface)
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def get(self, conn):
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"""Implements the block getter of chainsyncer.driver.base.Syncer.
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:param conn: RPC connection
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:type conn: chainlib.connection.RPCConnection
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:raises NoBlockForYou: End of mocked block array reached
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:rtype: chainsyncer.unittest.base.MockBlock
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:returns: Mock block.
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"""
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(pair, fltr) = self.backend.get()
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(target_block, fltr) = self.backend.target()
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block_height = pair[0]
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if block_height == target_block:
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self.running = False
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raise NoBlockForYou()
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block_txs = []
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if block_height < len(self.tx_counts):
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for i in range(self.tx_counts[block_height]):
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block_txs.append(add_0x(os.urandom(32).hex()))
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return MockBlock(block_height, block_txs)
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