source-coverage.js
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const { classes } = require('istanbul-lib-coverage');
function cloneLocation(loc) {
return {
start: {
line: loc && loc.start.line,
column: loc && loc.start.column
},
end: {
line: loc && loc.end.line,
column: loc && loc.end.column
}
};
}
/**
* SourceCoverage provides mutation methods to manipulate the structure of
* a file coverage object. Used by the instrumenter to create a full coverage
* object for a file incrementally.
*
* @private
* @param pathOrObj {String|Object} - see the argument for {@link FileCoverage}
* @extends FileCoverage
* @constructor
*/
class SourceCoverage extends classes.FileCoverage {
constructor(pathOrObj) {
super(pathOrObj);
this.meta = {
last: {
s: 0,
f: 0,
b: 0
}
};
}
newStatement(loc) {
const s = this.meta.last.s;
this.data.statementMap[s] = cloneLocation(loc);
this.data.s[s] = 0;
this.meta.last.s += 1;
return s;
}
newFunction(name, decl, loc) {
const f = this.meta.last.f;
name = name || '(anonymous_' + f + ')';
this.data.fnMap[f] = {
name,
decl: cloneLocation(decl),
loc: cloneLocation(loc),
// DEPRECATED: some legacy reports require this info.
line: loc && loc.start.line
};
this.data.f[f] = 0;
this.meta.last.f += 1;
return f;
}
newBranch(type, loc, isReportLogic = false) {
const b = this.meta.last.b;
this.data.b[b] = [];
this.data.branchMap[b] = {
loc: cloneLocation(loc),
type,
locations: [],
// DEPRECATED: some legacy reports require this info.
line: loc && loc.start.line
};
this.meta.last.b += 1;
this.maybeNewBranchTrue(type, b, isReportLogic);
return b;
}
maybeNewBranchTrue(type, name, isReportLogic) {
if (!isReportLogic) {
return;
}
if (type !== 'binary-expr') {
return;
}
this.data.bT = this.data.bT || {};
this.data.bT[name] = [];
}
addBranchPath(name, location) {
const bMeta = this.data.branchMap[name];
const counts = this.data.b[name];
/* istanbul ignore if: paranoid check */
if (!bMeta) {
throw new Error('Invalid branch ' + name);
}
bMeta.locations.push(cloneLocation(location));
counts.push(0);
this.maybeAddBranchTrue(name);
return counts.length - 1;
}
maybeAddBranchTrue(name) {
if (!this.data.bT) {
return;
}
const countsTrue = this.data.bT[name];
if (!countsTrue) {
return;
}
countsTrue.push(0);
}
/**
* Assigns an input source map to the coverage that can be used
* to remap the coverage output to the original source
* @param sourceMap {object} the source map
*/
inputSourceMap(sourceMap) {
this.data.inputSourceMap = sourceMap;
}
freeze() {
// prune empty branches
const map = this.data.branchMap;
const branches = this.data.b;
const branchesT = this.data.bT || {};
Object.keys(map).forEach(b => {
if (map[b].locations.length === 0) {
delete map[b];
delete branches[b];
delete branchesT[b];
}
});
}
}
module.exports = { SourceCoverage };