fast-check
Version:
Property based testing framework for JavaScript (like QuickCheck)
57 lines (56 loc) • 2.04 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.buildStableArbitraryGeneratorCache = buildStableArbitraryGeneratorCache;
exports.naiveIsEqual = naiveIsEqual;
const globals_1 = require("../../../utils/globals");
const safeArrayIsArray = Array.isArray;
const safeObjectKeys = Object.keys;
const safeObjectIs = Object.is;
function buildStableArbitraryGeneratorCache(isEqual) {
const previousCallsPerBuilder = new globals_1.Map();
return function stableArbitraryGeneratorCache(builder, args) {
const entriesForBuilder = (0, globals_1.safeMapGet)(previousCallsPerBuilder, builder);
if (entriesForBuilder === undefined) {
const newValue = builder(...args);
(0, globals_1.safeMapSet)(previousCallsPerBuilder, builder, [{ args, value: newValue }]);
return newValue;
}
const safeEntriesForBuilder = entriesForBuilder;
for (const entry of safeEntriesForBuilder) {
if (isEqual(args, entry.args)) {
return entry.value;
}
}
const newValue = builder(...args);
(0, globals_1.safePush)(safeEntriesForBuilder, { args, value: newValue });
return newValue;
};
}
function naiveIsEqual(v1, v2) {
if (v1 !== null && typeof v1 === 'object' && v2 !== null && typeof v2 === 'object') {
if (safeArrayIsArray(v1)) {
if (!safeArrayIsArray(v2))
return false;
if (v1.length !== v2.length)
return false;
}
else if (safeArrayIsArray(v2)) {
return false;
}
if (safeObjectKeys(v1).length !== safeObjectKeys(v2).length) {
return false;
}
for (const index in v1) {
if (!(index in v2)) {
return false;
}
if (!naiveIsEqual(v1[index], v2[index])) {
return false;
}
}
return true;
}
else {
return safeObjectIs(v1, v2);
}
}