fast-check
Version:
Property based testing framework for JavaScript (like QuickCheck)
42 lines (41 loc) • 1.97 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.buildGeneratorValue = buildGeneratorValue;
const Value_1 = require("../../../check/arbitrary/definition/Value");
const symbols_1 = require("../../../check/symbols");
const globals_1 = require("../../../utils/globals");
const stringify_1 = require("../../../utils/stringify");
const safeObjectAssign = Object.assign;
function buildGeneratorValue(mrng, biasFactor, computePreBuiltValues, arbitraryCache) {
const preBuiltValues = computePreBuiltValues();
let localMrng = mrng.clone();
const context = { mrng: mrng.clone(), biasFactor, history: [] };
const valueFunction = (arb) => {
const preBuiltValue = preBuiltValues[context.history.length];
if (preBuiltValue !== undefined && preBuiltValue.arb === arb) {
const value = preBuiltValue.value;
(0, globals_1.safePush)(context.history, { arb, value, context: preBuiltValue.context, mrng: preBuiltValue.mrng });
localMrng = preBuiltValue.mrng.clone();
return value;
}
const g = arb.generate(localMrng, biasFactor);
(0, globals_1.safePush)(context.history, { arb, value: g.value_, context: g.context, mrng: localMrng.clone() });
return g.value;
};
const memoedValueFunction = (arb, ...args) => {
return valueFunction(arbitraryCache(arb, args));
};
const valueMethods = {
values() {
return (0, globals_1.safeMap)(context.history, (c) => c.value);
},
[symbols_1.cloneMethod]() {
return buildGeneratorValue(mrng, biasFactor, computePreBuiltValues, arbitraryCache).value;
},
[stringify_1.toStringMethod]() {
return (0, stringify_1.stringify)((0, globals_1.safeMap)(context.history, (c) => c.value));
},
};
const value = safeObjectAssign(memoedValueFunction, valueMethods);
return new Value_1.Value(value, context);
}