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import { promisify } from '@0xproject/utils';
import { stripHexPrefix } from 'ethereumjs-util';
import * as fs from 'fs';
import { Collector } from 'istanbul';
import * as _ from 'lodash';
import { getLogger, levels, Logger } from 'loglevel';
import * as mkdirp from 'mkdirp';
import { AbstractArtifactAdapter } from './artifact_adapters/abstract_artifact_adapter';
import { collectCoverageEntries } from './collect_coverage_entries';
import { constants } from './constants';
import { parseSourceMap } from './source_maps';
import {
BranchCoverage,
BranchDescription,
ContractData,
Coverage,
FunctionCoverage,
FunctionDescription,
SingleFileSourceRange,
SourceRange,
StatementCoverage,
StatementDescription,
Subtrace,
TraceInfo,
TraceInfoExistingContract,
TraceInfoNewContract,
} from './types';
import { utils } from './utils';
const mkdirpAsync = promisify<undefined>(mkdirp);
/**
* CoverageManager is used by CoverageSubprovider to compute code coverage based on collected trace data.
*/
export class CoverageManager {
private _artifactAdapter: AbstractArtifactAdapter;
private _logger: Logger;
private _traceInfos: TraceInfo[] = [];
/**
* Computed partial coverage for a single file & subtrace
* @param contractData Contract metadata (source, srcMap, bytecode)
* @param subtrace A subset of a transcation/call trace that was executed within that contract
* @param pcToSourceRange A mapping from program counters to source ranges
* @param fileIndex Index of a file to compute coverage for
* @return Partial istanbul coverage for that file & subtrace
*/
private static _getSingleFileCoverageForSubtrace(
contractData: ContractData,
subtrace: Subtrace,
pcToSourceRange: { [programCounter: number]: SourceRange },
fileIndex: number,
): Coverage {
const absoluteFileName = contractData.sources[fileIndex];
const coverageEntriesDescription = collectCoverageEntries(contractData.sourceCodes[fileIndex]);
let sourceRanges = _.map(subtrace, structLog => pcToSourceRange[structLog.pc]);
sourceRanges = _.compact(sourceRanges); // Some PC's don't map to a source range and we just ignore them.
// By default lodash does a shallow object comparasion. We JSON.stringify them and compare as strings.
sourceRanges = _.uniqBy(sourceRanges, s => JSON.stringify(s)); // We don't care if one PC was covered multiple times within a single transaction
sourceRanges = _.filter(sourceRanges, sourceRange => sourceRange.fileName === absoluteFileName);
const branchCoverage: BranchCoverage = {};
const branchIds = _.keys(coverageEntriesDescription.branchMap);
for (const branchId of branchIds) {
const branchDescription = coverageEntriesDescription.branchMap[branchId];
const isBranchCoveredByBranchIndex = _.map(branchDescription.locations, location => {
const isBranchCovered = _.some(sourceRanges, range => utils.isRangeInside(range.location, location));
const timesBranchCovered = Number(isBranchCovered);
return timesBranchCovered;
});
branchCoverage[branchId] = isBranchCoveredByBranchIndex;
}
const statementCoverage: StatementCoverage = {};
const statementIds = _.keys(coverageEntriesDescription.statementMap);
for (const statementId of statementIds) {
const statementDescription = coverageEntriesDescription.statementMap[statementId];
const isStatementCovered = _.some(sourceRanges, range =>
utils.isRangeInside(range.location, statementDescription),
);
const timesStatementCovered = Number(isStatementCovered);
statementCoverage[statementId] = timesStatementCovered;
}
const functionCoverage: FunctionCoverage = {};
const functionIds = _.keys(coverageEntriesDescription.fnMap);
for (const fnId of functionIds) {
const functionDescription = coverageEntriesDescription.fnMap[fnId];
const isFunctionCovered = _.some(sourceRanges, range =>
utils.isRangeInside(range.location, functionDescription.loc),
);
const timesFunctionCovered = Number(isFunctionCovered);
functionCoverage[fnId] = timesFunctionCovered;
}
// HACK: Solidity doesn't emit any opcodes that map back to modifiers with no args, that's why we map back to the
// function range and check if there is any covered statement within that range.
for (const modifierStatementId of coverageEntriesDescription.modifiersStatementIds) {
if (statementCoverage[modifierStatementId]) {
// Already detected as covered
continue;
}
const modifierDescription = coverageEntriesDescription.statementMap[modifierStatementId];
const enclosingFunction = _.find(coverageEntriesDescription.fnMap, functionDescription =>
utils.isRangeInside(modifierDescription, functionDescription.loc),
) as FunctionDescription;
const isModifierCovered = _.some(
coverageEntriesDescription.statementMap,
(statementDescription: StatementDescription, statementId: number) => {
const isInsideTheModifierEnclosingFunction = utils.isRangeInside(
statementDescription,
enclosingFunction.loc,
);
const isCovered = statementCoverage[statementId];
return isInsideTheModifierEnclosingFunction && isCovered;
},
);
const timesModifierCovered = Number(isModifierCovered);
statementCoverage[modifierStatementId] = timesModifierCovered;
}
const partialCoverage = {
[absoluteFileName]: {
...coverageEntriesDescription,
path: absoluteFileName,
f: functionCoverage,
s: statementCoverage,
b: branchCoverage,
},
};
return partialCoverage;
}
constructor(artifactAdapter: AbstractArtifactAdapter, isVerbose: boolean) {
this._artifactAdapter = artifactAdapter;
this._logger = getLogger('sol-cov');
this._logger.setLevel(isVerbose ? levels.TRACE : levels.ERROR);
}
public appendTraceInfo(traceInfo: TraceInfo): void {
this._traceInfos.push(traceInfo);
}
public async writeCoverageAsync(): Promise<void> {
const finalCoverage = await this._computeCoverageAsync();
const stringifiedCoverage = JSON.stringify(finalCoverage, null, '\t');
await mkdirpAsync('coverage');
fs.writeFileSync('coverage/coverage.json', stringifiedCoverage);
}
private async _computeCoverageAsync(): Promise<Coverage> {
const contractsData = await this._artifactAdapter.collectContractsDataAsync();
const collector = new Collector();
for (const traceInfo of this._traceInfos) {
const isContractCreation = traceInfo.address === constants.NEW_CONTRACT;
const bytecode = isContractCreation
? (traceInfo as TraceInfoNewContract).bytecode
: (traceInfo as TraceInfoExistingContract).runtimeBytecode;
const contractData = utils.getContractDataIfExists(contractsData, bytecode);
if (_.isUndefined(contractData)) {
const errMsg = isContractCreation
? `Unknown contract creation transaction`
: `Transaction to an unknown address: ${traceInfo.address}`;
this._logger.warn(errMsg);
continue;
}
const bytecodeHex = stripHexPrefix(bytecode);
const sourceMap = isContractCreation ? contractData.sourceMap : contractData.sourceMapRuntime;
const pcToSourceRange = parseSourceMap(
contractData.sourceCodes,
sourceMap,
bytecodeHex,
contractData.sources,
);
for (let fileIndex = 0; fileIndex < contractData.sources.length; fileIndex++) {
const singleFileCoverageForTrace = CoverageManager._getSingleFileCoverageForSubtrace(
contractData,
traceInfo.subtrace,
pcToSourceRange,
fileIndex,
);
collector.add(singleFileCoverageForTrace);
}
}
return collector.getFinalCoverage();
}
}
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