stryker/src/mutators/BooleanSubstitutionMutator.js

The extendable JavaScript mutation testing framework

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var esprima_1 = require("esprima");
var BooleanSubstitutionMutator = /** @class */ (function () {
    function BooleanSubstitutionMutator() {
        this.name = 'BooleanSubstitution';
    }
    BooleanSubstitutionMutator.prototype.applyMutations = function (node, copy) {
        var nodes = [];
        // !a -> a
        if (node.type === esprima_1.Syntax.UnaryExpression && node.operator === '!') {
            var mutatedNode = copy(node.argument);
            mutatedNode.nodeID = node.nodeID;
            nodes.push(mutatedNode);
        }
        // true -> false or false -> true
        if (node.type === esprima_1.Syntax.Literal && typeof node.value === 'boolean') {
            var mutatedNode = copy(node);
            mutatedNode.value = !mutatedNode.value;
            nodes.push(mutatedNode);
        }
        return nodes;
    };
    return BooleanSubstitutionMutator;
}());
exports.default = BooleanSubstitutionMutator;
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