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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 | 6x 6x 6x 6x 6x 90x 21581x 21581x 854592x 21581x 21581x 7354x 7354x 7272x 7270x 5822x 6121x 6121x 6027x 6027x 3176x 2799x 2595x 1208x 1208x 1208x 1208x 362x 310x 156x 84x 5904x 5904x 3270x 3270x 1600x 1600x 426x 426x 417x 1174x 1174x | import {DelOp, InsObjOp, InsStrOp, InsBinOp, InsArrOp, UpdArrOp} from '../../../json-crdt-patch/operations';
import {RandomJson} from '@jsonjoy.com/util/lib/json-random';
import type {JsonNode, ObjNode, ArrNode, BinNode, StrNode} from '../../nodes';
import type {Model} from '../../model/Model';
import {Fuzzer} from '@jsonjoy.com/util/lib/Fuzzer';
import type {FuzzerOptions} from './types';
type StringOp = typeof InsStrOp | typeof DelOp;
type BinaryOp = typeof InsBinOp | typeof DelOp;
type ArrayOp = typeof InsArrOp | typeof DelOp | typeof UpdArrOp;
type ObjectOp = typeof InsObjOp | typeof DelOp;
const commonKeys = ['a', 'op', 'test', 'name', '', '__proto__'];
/**
* This class picks random nodes from a model and picks a random
* operation to apply to that node.
*/
export class Picker {
constructor(public opts: FuzzerOptions) {}
public pickNode(model: Model): JsonNode | null {
const nodes: JsonNode[] = [];
const index = model.index;
// biome-ignore lint: index is not iterable
index.forEach(({v: node}) => nodes.push(node));
Iif (!nodes.length) return null;
return Fuzzer.pick(nodes);
}
public pickStringOperation(node: StrNode): StringOp {
const length = node.length();
if (!length) return InsStrOp;
if (length >= this.opts.maxStringLength) return DelOp;
if (Math.random() < this.opts.stringDeleteProbability) return DelOp;
return InsStrOp;
}
public pickBinaryOperation(node: BinNode): BinaryOp {
const length = node.length();
if (!length) return InsBinOp;
Iif (length >= this.opts.maxStringLength) return DelOp;
if (Math.random() < this.opts.binaryDeleteProbability) return DelOp;
return InsBinOp;
}
public pickObjectOperation(node: ObjNode): [key: string, opcode: ObjectOp] {
if (!node.keys.size) return [this.generateObjectKey(), InsObjOp];
if (Math.random() > 0.45) return [this.generateObjectKey(), InsObjOp];
const keys = [...node.keys.keys()];
Iif (!keys.length) return [this.generateObjectKey(), InsObjOp];
const key = Fuzzer.pick(keys);
return [key, DelOp];
}
public pickArrayOperation(node: ArrNode): ArrayOp {
if (!node.length()) return InsArrOp;
if (Math.random() > 0.45) return InsArrOp;
if (Math.random() > 0.45) return UpdArrOp;
else return DelOp;
}
public generateSubstring(): string {
const length = Math.floor(Math.random() * this.opts.maxSubstringLength) + 1;
return RandomJson.genString(length);
}
public generateBinaryData(): Uint8Array {
const length = Math.floor(Math.random() * this.opts.maxBinaryChunkLength) + 1;
return RandomJson.genBinary(length);
}
public generateObjectKey(): string {
const useCommonKey = Math.random() < 0.25;
if (useCommonKey) {
const str = Fuzzer.pick(commonKeys);
if (this.opts.noProtoString && str === '__proto__') return this.generateObjectKey();
return str;
} else {
const length = Math.floor(Math.random() * 20) + 1;
return RandomJson.genString(length);
}
}
}
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