source-coverage.js

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.SourceCoverage = void 0;

var _istanbulLibCoverage = 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 _istanbulLibCoverage.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) {
    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;
    return b;
  }

  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);
    return counts.length - 1;
  }
  /**
   * 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;
    Object.keys(map).forEach(b => {
      if (map[b].locations.length === 0) {
        delete map[b];
        delete branches[b];
      }
    });
  }

}

exports.SourceCoverage = SourceCoverage;