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How to use prepareSetBuilderData method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

ArrayArbitrary.spec.ts

Source:ArrayArbitrary.spec.ts

...30          fc.nat(MaxLengthUpperBound),31          fc.anything(),32          (generatedValues, seed, aLength, bLength, integerContext) => {33            // Arrange34            const { acceptedValues, instance, generate } = prepareSetBuilderData(generatedValues, false);35            const { minLength, maxGeneratedLength, maxLength } = extractLengths(seed, aLength, bLength, acceptedValues);36            const { instance: integerInstance, generate: generateInteger } = fakeArbitrary();37            generateInteger.mockReturnValue(new Value(acceptedValues.size, integerContext));38            const integer = jest.spyOn(IntegerMock, 'integer');39            integer.mockReturnValue(integerInstance);40            const { instance: mrng } = fakeRandom();41            // Act42            const arb = new ArrayArbitrary(43              instance,44              minLength,45              maxGeneratedLength,46              maxLength,47              undefined,48              undefined,49              []50            );51            const g = arb.generate(mrng, undefined);52            // Assert53            expect(g.hasToBeCloned).toBe(false);54            expect(g.value).toEqual([...acceptedValues].map((v) => v.value));55            expect(integer).toHaveBeenCalledTimes(1);56            expect(integer).toHaveBeenCalledWith({ min: minLength, max: maxGeneratedLength });57            expect(generateInteger).toHaveBeenCalledTimes(1);58            expect(generateInteger).toHaveBeenCalledWith(mrng, undefined);59            expect(generate).toHaveBeenCalledTimes(acceptedValues.size);60            for (const call of generate.mock.calls) {61              expect(call).toEqual([mrng, undefined]);62            }63          }64        )65      );66    });67    it("should not concat all the values together in case they don't follow set contraints", () => {68      fc.assert(69        fc.property(70          fc.array(fc.tuple(fc.anything(), fc.anything(), fc.boolean())),71          fc.nat(),72          fc.nat(MaxLengthUpperBound),73          fc.nat(MaxLengthUpperBound),74          fc.anything(),75          (generatedValues, seed, aLength, bLength, integerContext) => {76            // Arrange77            const { acceptedValues, instance, generate, setBuilder } = prepareSetBuilderData(generatedValues, false);78            const { minLength, maxGeneratedLength, maxLength } = extractLengths(seed, aLength, bLength, acceptedValues);79            const { instance: integerInstance, generate: generateInteger } = fakeArbitrary();80            generateInteger.mockReturnValue(new Value(acceptedValues.size, integerContext));81            const integer = jest.spyOn(IntegerMock, 'integer');82            integer.mockReturnValue(integerInstance);83            const { instance: mrng } = fakeRandom();84            // Act85            const arb = new ArrayArbitrary(86              instance,87              minLength,88              maxGeneratedLength,89              maxLength,90              undefined,91              setBuilder,92              []93            );94            const g = arb.generate(mrng, undefined);95            // Assert96            expect(g.hasToBeCloned).toBe(false);97            // In the case of set the generated value might be smaller98            // The generator is allowed to stop whenever it considers at already tried to many times (maxGeneratedLength times)99            expect(g.value).toEqual([...acceptedValues].map((v) => v.value).slice(0, g.value.length));100            expect(integer).toHaveBeenCalledTimes(1);101            expect(integer).toHaveBeenCalledWith({ min: minLength, max: maxGeneratedLength });102            expect(generateInteger).toHaveBeenCalledTimes(1);103            expect(generateInteger).toHaveBeenCalledWith(mrng, undefined);104            expect(setBuilder).toHaveBeenCalledTimes(1);105            for (const call of generate.mock.calls) {106              expect(call).toEqual([mrng, undefined]);107            }108          }109        )110      );111    });112    it("should always pass bias to values' arbitrary when minLength equals maxGeneratedLength", () => {113      fc.assert(114        fc.property(115          fc.array(fc.tuple(fc.anything(), fc.anything(), fc.boolean())),116          fc.nat(),117          fc.nat(MaxLengthUpperBound),118          fc.anything(),119          fc.integer({ min: 2 }),120          fc.boolean(),121          (generatedValues, seed, aLength, integerContext, biasFactor, withSetBuilder) => {122            // Arrange123            const { acceptedValues, instance, setBuilder, generate } = prepareSetBuilderData(124              generatedValues,125              !withSetBuilder126            );127            const { minLength, maxLength } = extractLengths(seed, aLength, aLength, acceptedValues);128            const { instance: integerInstance, generate: generateInteger } = fakeArbitrary();129            generateInteger.mockReturnValue(new Value(minLength, integerContext));130            const integer = jest.spyOn(IntegerMock, 'integer');131            integer.mockReturnValue(integerInstance);132            const { instance: mrng } = fakeRandom();133            // Act134            const arb = new ArrayArbitrary(135              instance,136              minLength,137              minLength,138              maxLength,139              undefined,140              withSetBuilder ? setBuilder : undefined,141              []142            );143            const g = arb.generate(mrng, biasFactor);144            // Assert145            expect(g.hasToBeCloned).toBe(false);146            if (!withSetBuilder) {147              // In the case of set the generated value might be smaller148              // The generator is allowed to stop whenever it considers at already tried to many times (maxGeneratedLength times)149              expect(g.value).toEqual([...acceptedValues].map((v) => v.value).slice(0, minLength));150            } else {151              expect(g.value).toEqual(152                [...acceptedValues].map((v) => v.value).slice(0, Math.min(g.value.length, minLength))153              );154            }155            expect(integer).toHaveBeenCalledTimes(1);156            expect(integer).toHaveBeenCalledWith({ min: minLength, max: minLength });157            expect(generateInteger).toHaveBeenCalledTimes(1);158            expect(generateInteger).toHaveBeenCalledWith(mrng, undefined); // no need to bias it159            expect(setBuilder).toHaveBeenCalledTimes(withSetBuilder ? 1 : 0);160            expect(generate.mock.calls.length).toBeGreaterThanOrEqual(minLength);161            for (const call of generate.mock.calls) {162              expect(call).toEqual([mrng, biasFactor]); // but bias all sub-values163            }164          }165        )166      );167    });168    it('should bias depth the same way for any child and reset it at the end', () => {169      fc.assert(170        fc.property(171          fc.array(fc.tuple(fc.anything(), fc.anything(), fc.boolean())),172          fc.nat(),173          fc.nat(MaxLengthUpperBound),174          fc.nat(MaxLengthUpperBound),175          fc.anything(),176          fc.integer({ min: 2 }),177          fc.boolean(),178          (generatedValues, seed, aLength, bLength, integerContext, biasFactor, withSetBuilder) => {179            // Arrange180            const getDepthContextFor = jest.spyOn(DepthContextMock, 'getDepthContextFor');181            const depthContext = { depth: 0 };182            getDepthContextFor.mockReturnValue(depthContext);183            const seenDepths = new Set<number>();184            const { acceptedValues, instance, generate, setBuilder } = prepareSetBuilderData(185              generatedValues,186              !withSetBuilder,187              () => {188                seenDepths.add(depthContext.depth);189              }190            );191            const { minLength, maxGeneratedLength, maxLength } = extractLengths(seed, aLength, bLength, acceptedValues);192            const { instance: integerInstance, generate: generateInteger } = fakeArbitrary();193            generateInteger.mockReturnValue(new Value(minLength, integerContext));194            const integer = jest.spyOn(IntegerMock, 'integer');195            integer.mockReturnValue(integerInstance);196            const { instance: mrng } = fakeRandom();197            // Act198            const arb = new ArrayArbitrary(199              instance,200              minLength,201              maxGeneratedLength,202              maxLength,203              undefined,204              withSetBuilder ? setBuilder : undefined,205              []206            );207            arb.generate(mrng, biasFactor);208            // Assert209            expect(getDepthContextFor).toHaveBeenCalledTimes(1); // only array calls it in the test210            expect(depthContext.depth).toBe(0); // properly reset211            if (generate.mock.calls.length !== 0) {212              expect([...seenDepths]).toHaveLength(1); // always called with same depth213            } else {214              expect([...seenDepths]).toHaveLength(0); // never called on items215            }216          }217        )218      );219    });220    it('should produce a cloneable instance if provided one cloneable underlying', () => {221      // Arrange222      const { instance, generate } = fakeArbitrary<string[]>();223      generate224        .mockReturnValueOnce(new Value(['a'], undefined))225        .mockReturnValueOnce(new Value(Object.defineProperty(['b'], cloneMethod, { value: jest.fn() }), undefined))226        .mockReturnValueOnce(new Value(['c'], undefined))227        .mockReturnValueOnce(new Value(['d'], undefined));228      const { instance: integerInstance, generate: generateInteger } = fakeArbitrary();229      generateInteger.mockReturnValue(new Value(4, undefined));230      const integer = jest.spyOn(IntegerMock, 'integer');231      integer.mockReturnValue(integerInstance);232      const { instance: mrng } = fakeRandom();233      // Act234      const arb = new ArrayArbitrary(instance, 0, 10, 100, undefined, undefined, []);235      const g = arb.generate(mrng, undefined);236      // Assert237      expect(g.hasToBeCloned).toBe(true);238      expect(hasCloneMethod(g.value)).toBe(true);239      expect(g.value_).not.toEqual([['a'], ['b'], ['c'], ['d']]); // 2nd item is not just ['b']240      expect(g.value_.map((v) => [...v])).toEqual([['a'], ['b'], ['c'], ['d']]);241    });242    it('should not clone cloneable on generate', () => {243      // Arrange244      const cloneMethodImpl = jest.fn();245      const { instance, generate } = fakeArbitrary<string[]>();246      generate247        .mockReturnValueOnce(new Value(['a'], undefined))248        .mockReturnValueOnce(249          new Value(Object.defineProperty(['b'], cloneMethod, { value: cloneMethodImpl }), undefined)250        )251        .mockReturnValueOnce(new Value(['c'], undefined))252        .mockReturnValueOnce(new Value(['d'], undefined));253      const { instance: integerInstance, generate: generateInteger } = fakeArbitrary();254      generateInteger.mockReturnValue(new Value(4, undefined));255      const integer = jest.spyOn(IntegerMock, 'integer');256      integer.mockReturnValue(integerInstance);257      const { instance: mrng } = fakeRandom();258      // Act259      const arb = new ArrayArbitrary(instance, 0, 10, 100, undefined, undefined, []);260      const g = arb.generate(mrng, undefined);261      // Assert262      expect(cloneMethodImpl).not.toHaveBeenCalled();263      g.value; // not calling clone as this is the first access264      expect(cloneMethodImpl).not.toHaveBeenCalled();265      g.value; // calling clone as this is the second access266      expect(cloneMethodImpl).toHaveBeenCalledTimes(1);267      g.value; // calling clone (again) as this is the third access268      expect(cloneMethodImpl).toHaveBeenCalledTimes(2);269      g.value_; // not calling clone as we access value_ not value270      expect(cloneMethodImpl).toHaveBeenCalledTimes(2);271    });272  });273  describe('canShrinkWithoutContext', () => {274    it('should reject any array not matching the requirements on length', () => {275      fc.assert(276        fc.property(277          fc.array(fc.anything()),278          fc.boolean(),279          fc.nat(MaxLengthUpperBound),280          fc.nat(MaxLengthUpperBound),281          fc.nat(MaxLengthUpperBound),282          (value, withSetBuilder, aLength, bLength, cLength) => {283            // Arrange284            const [minLength, maxGeneratedLength, maxLength] = [aLength, bLength, cLength].sort((a, b) => a - b);285            fc.pre(value.length < minLength || value.length > maxLength);286            const { instance, canShrinkWithoutContext } = fakeArbitrary();287            const data: any[] = [];288            const customSet: CustomSet<Value<any>> = {289              size: () => data.length,290              getData: () => data,291              tryAdd: (vTest) => {292                data.push(vTest.value_);293                return true;294              },295            };296            const setBuilder = jest.fn();297            setBuilder.mockReturnValue(customSet);298            // Act299            const arb = new ArrayArbitrary(300              instance,301              minLength,302              maxGeneratedLength,303              maxLength,304              undefined,305              withSetBuilder ? setBuilder : undefined,306              []307            );308            const out = arb.canShrinkWithoutContext(value);309            // Assert310            expect(out).toBe(false);311            expect(canShrinkWithoutContext).not.toHaveBeenCalled();312            expect(setBuilder).not.toHaveBeenCalled();313          }314        )315      );316    });317    it('should reject any array with at least one entry rejected by the sub-arbitrary', () => {318      fc.assert(319        fc.property(320          fc.uniqueArray(fc.tuple(fc.anything(), fc.boolean()), {321            minLength: 1,322            selector: (v) => v[0],323            comparator: 'SameValue',324          }),325          fc.boolean(),326          fc.nat(MaxLengthUpperBound),327          fc.nat(MaxLengthUpperBound),328          fc.nat(MaxLengthUpperBound),329          (value, withSetBuilder, offsetMin, offsetMax, maxGeneratedLength) => {330            // Arrange331            fc.pre(value.some((v) => !v[1]));332            const minLength = Math.min(Math.max(0, value.length - offsetMin), maxGeneratedLength);333            const maxLength = Math.max(Math.min(MaxLengthUpperBound, value.length + offsetMax), maxGeneratedLength);334            const { instance, canShrinkWithoutContext } = fakeArbitrary();335            canShrinkWithoutContext.mockImplementation((vTest) => value.find((v) => Object.is(v[0], vTest))![1]);336            const data: any[] = [];337            const customSet: CustomSet<Value<any>> = {338              size: () => data.length,339              getData: () => data,340              tryAdd: (vTest) => {341                data.push(vTest.value_);342                return true;343              },344            };345            const setBuilder = jest.fn();346            setBuilder.mockReturnValue(customSet);347            // Act348            const arb = new ArrayArbitrary(349              instance,350              minLength,351              maxGeneratedLength,352              maxLength,353              undefined,354              withSetBuilder ? setBuilder : undefined,355              []356            );357            const out = arb.canShrinkWithoutContext(value.map((v) => v[0]));358            // Assert359            expect(out).toBe(false);360            expect(canShrinkWithoutContext).toHaveBeenCalled();361          }362        )363      );364    });365    it('should reject any array not matching requirements for set constraints', () => {366      fc.assert(367        fc.property(368          fc.uniqueArray(fc.tuple(fc.anything(), fc.boolean()), {369            minLength: 1,370            selector: (v) => v[0],371            comparator: 'SameValue',372          }),373          fc.nat(MaxLengthUpperBound),374          fc.nat(MaxLengthUpperBound),375          fc.nat(MaxLengthUpperBound),376          (value, offsetMin, offsetMax, maxGeneratedLength) => {377            // Arrange378            fc.pre(value.some((v) => !v[1]));379            const minLength = Math.min(Math.max(0, value.length - offsetMin), maxGeneratedLength);380            const maxLength = Math.max(Math.min(MaxLengthUpperBound, value.length + offsetMax), maxGeneratedLength);381            const { instance, canShrinkWithoutContext } = fakeArbitrary();382            canShrinkWithoutContext.mockReturnValue(true);383            const data: any[] = [];384            const customSet: CustomSet<Value<any>> = {385              size: () => data.length,386              getData: () => data,387              tryAdd: (vTest) => {388                if (value.find((v) => Object.is(v[0], vTest.value_))![1]) {389                  data.push(vTest.value_);390                  return true;391                }392                return false;393              },394            };395            const setBuilder = jest.fn();396            setBuilder.mockReturnValue(customSet);397            // Act398            const arb = new ArrayArbitrary(399              instance,400              minLength,401              maxGeneratedLength,402              maxLength,403              undefined,404              setBuilder,405              []406            );407            const out = arb.canShrinkWithoutContext(value.map((v) => v[0]));408            // Assert409            expect(out).toBe(false);410            expect(canShrinkWithoutContext).toHaveBeenCalled();411            expect(setBuilder).toHaveBeenCalled();412          }413        )414      );415    });416    it('should reject any sparse array', () => {417      fc.assert(418        fc.property(419          fc.sparseArray(fc.anything()),420          fc.boolean(),421          fc.nat(MaxLengthUpperBound),422          fc.nat(MaxLengthUpperBound),423          fc.nat(MaxLengthUpperBound),424          (value, withSetBuilder, offsetMin, offsetMax, maxGeneratedLength) => {425            // Arrange426            fc.pre(value.length !== Object.keys(value).length);427            const minLength = Math.min(Math.max(0, value.length - offsetMin), maxGeneratedLength);428            const maxLength = Math.max(Math.min(MaxLengthUpperBound, value.length + offsetMax), maxGeneratedLength);429            const { instance, canShrinkWithoutContext } = fakeArbitrary();430            canShrinkWithoutContext.mockReturnValue(true);431            const data: any[] = [];432            const customSet: CustomSet<Value<any>> = {433              size: () => data.length,434              getData: () => data,435              tryAdd: (vTest) => {436                data.push(vTest.value_);437                return true;438              },439            };440            const setBuilder = jest.fn();441            setBuilder.mockReturnValue(customSet);442            // Act443            const arb = new ArrayArbitrary(444              instance,445              minLength,446              maxGeneratedLength,447              maxLength,448              undefined,449              withSetBuilder ? setBuilder : undefined,450              []451            );452            const out = arb.canShrinkWithoutContext(value);453            // Assert454            expect(out).toBe(false);455          }456        )457      );458    });459    it('should accept all other arrays', () => {460      fc.assert(461        fc.property(462          fc.array(fc.anything()),463          fc.boolean(),464          fc.nat(MaxLengthUpperBound),465          fc.nat(MaxLengthUpperBound),466          fc.nat(MaxLengthUpperBound),467          (value, withSetBuilder, offsetMin, offsetMax, maxGeneratedLength) => {468            // Arrange469            const minLength = Math.min(Math.max(0, value.length - offsetMin), maxGeneratedLength);470            const maxLength = Math.max(Math.min(MaxLengthUpperBound, value.length + offsetMax), maxGeneratedLength);471            const { instance, canShrinkWithoutContext } = fakeArbitrary();472            canShrinkWithoutContext.mockReturnValue(true);473            const data: any[] = [];474            const customSet: CustomSet<Value<any>> = {475              size: () => data.length,476              getData: () => data,477              tryAdd: (vTest) => {478                data.push(vTest.value_);479                return true;480              },481            };482            const setBuilder = jest.fn();483            setBuilder.mockReturnValue(customSet);484            // Act485            const arb = new ArrayArbitrary(486              instance,487              minLength,488              maxGeneratedLength,489              maxLength,490              undefined,491              withSetBuilder ? setBuilder : undefined,492              []493            );494            const out = arb.canShrinkWithoutContext(value);495            // Assert496            expect(out).toBe(true);497          }498        )499      );500    });501  });502});503describe('ArrayArbitrary (integration)', () => {504  it('should not re-use twice the same instance of cloneable', () => {505    // Arrange506    const alreadySeenCloneable = new Set<unknown>();507    const mrng = new Random(prand.mersenne(0));508    const arb = new ArrayArbitrary(new CloneableArbitrary(), 0, 5, 100, undefined, undefined, []); // 0 to 5 generated items509    // Act510    let g = arb.generate(mrng, undefined);511    while (g.value.length !== 3) {512      // 3 allows to shrink something large enough but not too large513      // walking through the tree when >3 takes much longer514      g = arb.generate(mrng, undefined);515    }516    const treeA = buildShrinkTree(arb, g);517    const treeB = buildShrinkTree(arb, g);518    // Assert519    walkTree(treeA, (cloneable) => {520      expect(alreadySeenCloneable.has(cloneable)).toBe(false);521      alreadySeenCloneable.add(cloneable);522      for (const subCloneable of cloneable) {523        expect(alreadySeenCloneable.has(subCloneable)).toBe(false);524        alreadySeenCloneable.add(subCloneable);525      }526    });527    walkTree(treeB, (cloneable) => {528      expect(alreadySeenCloneable.has(cloneable)).toBe(false);529      alreadySeenCloneable.add(cloneable);530      for (const subCloneable of cloneable) {531        expect(alreadySeenCloneable.has(subCloneable)).toBe(false);532        alreadySeenCloneable.add(subCloneable);533      }534    });535  });536});537// Helpers538function prepareSetBuilderData(539  generatedValues: [value: any, context: any, rejected?: boolean][],540  acceptAll: boolean,541  onGenerateHook?: () => void542) {543  const acceptedValues = new Set<Value<any>>();544  const { instance, generate } = fakeArbitrary();545  for (const v of generatedValues) {546    const value = new Value(v[0], v[1]);547    const rejected = v[2];548    if (!rejected || acceptAll) {549      acceptedValues.add(value);550    }551    generate.mockImplementationOnce(() => {552      if (onGenerateHook !== undefined) {...

Using AI Code Generation

1import { prepareSetBuilderData } from './node_modules/fast-check/lib/check/arbitrary/definition/PreconditionFailure.js';2const data = prepareSetBuilderData([1, 2, 3], 1, 2);3console.log(data);4import { prepareSetBuilderData } from './node_modules/fast-check/lib/check/arbitrary/definition/PreconditionFailure.js';5const data = prepareSetBuilderData([1, 2, 3], 1, 2);6console.log(data);7import { prepareSetBuilderData } from './node_modules/fast-check/lib/check/arbitrary/definition/PreconditionFailure.js';8const data = prepareSetBuilderData([1, 2, 3], 1, 2);9console.log(data);

Using AI Code Generation

1import { check } from 'fast-check';2import { prepareSetBuilderData } from 'fast-check/lib/check/index';3import { SetBuilder } from 'fast-check/lib/arbitrary/definition/SetArbitrary';4import { Stream } from 'fast-check/lib/stream/Stream';5import { array } from 'fast-check/lib/arbitrary/array';6import { constant } from 'fast-check/lib/arbitrary/constant';7import { nat } from 'fast-check/lib/arbitrary/nat';8import { tuple } from 'fast-check/lib/arbitrary/tuple';9import { set } from 'fast-check/lib/arbitrary/set';10import { frequency } from 'fast-check/lib/arbitrary/frequency';11import { oneof } from 'fast-check/lib/arbitrary/oneof';12const setBuilder = new SetBuilder();13const setBuilderData = prepareSetBuilderData(14  tuple(nat(), nat()),15);16const setArb = set(tuple(nat(), nat()), { maxLength: 100 });17const stream = setBuilderData.run(setArb);18  .take(100)19  .map((a) => {20    console.log(a);21  })22  .toArray();23const stream2 = array(set(tuple(nat(), nat()), { maxLength: 100 })).generate(24  new Random(42)25);26  .take(100)27  .map((a) => {28    console.log(a);29  })30  .toArray();31const stream3 = array(32  frequency(33    { arbitrary: constant('a'), weight: 1 },34    { arbitrary: constant('b'), weight: 1 },35    { arbitrary: constant('c'), weight: 1 }36).generate(new Random(42));37  .take(100)38  .map((a) => {39    console.log(a);40  })41  .toArray();42const stream4 = array(43  oneof(44    constant('a'),45    constant('b'),46    constant('c')47).generate(new Random(42));48  .take(100)49  .map((a) => {50    console.log(a);51  })52  .toArray();53import { check } from 'fast-check';54import { prepare

Using AI Code Generation

1const fastCheck = require('fast-check');2const { prepareSetBuilderData } = require('fast-check/lib/check/runner/Runner');3const { convertToNext } = require('fast-check/lib/check/arbitrary/definition/Converters');4const { set } = require('fast-check/lib/arbitrary/set');5const { convertFromNext } = require('fast-check/lib/check/arbitrary/definition/Converters');6const { convertFromNextWithShrunkOnce } = require('fast-check/lib/check/arbitrary/definition/Converters');7const { convertFromNextWithLazyShrunkOnce } = require('fast-check/lib/check/arbitrary/definition/Converters');8const { integer } = require('fast-check/lib/arbitrary/integer');9const { nat } = require('fast-check/lib/arbitrary/nat');10const { stringOf } = require('fast-check/lib/arbitrary/string');11const { array } = require('fast-check/lib/arbitrary/array');12const { subarray } = require('fast-check/lib/arbitrary/subarray');13const { oneof } = require('fast-check/lib/arbitrary/oneof');14const { constantFrom } = require('fast-check/lib/arbitrary/constantFrom');15const { record } = require('fast-check/lib/arbitrary/record');16const { tuple } = require('fast-check/lib/arbitrary/tuple');17const { dictionary } = require('fast-check/lib/arbitrary/dictionary');18const { option } = require('fast-check/lib/arbitrary/option');19const { frequency } = require('fast-check/lib/arbitrary/frequency');20const { object } = require('fast-check/lib/arbitrary/object');21const { bigUintN } = require('fast-check/lib/arbitrary/bigUintN');22const { bigIntN } = require('fast-check/lib/arbitrary/bigIntN');23const { unicode } = require('fast-check/lib/arbitrary/unicode');24const { unicodeJson } = require('fast-check/lib/arbitrary/unicodeJson');25const { char } = require('fast-check/lib/arbitrary/char');26const { ascii } = require('fast-check/lib/arbitrary/ascii');27const { hexa } = require('fast-check/lib/arbitrary/hexa');28const { base64 } = require('fast-check/lib/arbitrary/base64');29const { fullUnicode } = require('fast-check/lib/arbitrary/fullUnicode');30const { fullUnicodeJson }

Using AI Code Generation

1const { prepareSetBuilderData } = require('fast-check');2const { set: { build } } = prepareSetBuilderData();3console.log(build());4I have a function that takes a Set as an argument. I want to test that the function does not modify the Set (i.e. it is pure). I am using fast-check to generate random sets and then calling my function on them. I am using the following code:5const { set: { build } } = prepareSetBuilderData();6const fc = require('fast-check');7fc.assert(8    fc.property(9        fc.set(fc.integer()),10        (s) => {11            const sCopy = build(s);12            myFunction(s);13            return sCopy.equals(s);14        },15);16I have a function that takes a Set as an argument. I want to test that the function does not modify the Set (i.e. it is pure). I am using fast-check to generate random sets and then calling my function on them. I am using the following code: const { set: { build } } = prepareSetBuilderData(); const fc = require('fast-check'); fc.assert( fc.property( fc.set(fc.integer()), (s) => { const sCopy = build(s); myFunction(s); return sCopy.equals(s); }, ), ); I am getting the following error: TypeError: Cannot read property 'build' of undefined I am not sure if I am using the prepareSetBuilderData method correctly. Can someone help me out here?

Using AI Code Generation

1const fastCheck = require('fast-check');2const { prepareSetBuilderData } = require('fast-check');3const { Test3 } = require('./test3');4const { Test3Builder } = require('./test3-builder');5const { Test2Builder } = require('./test2-builder');6const { Test2 } = require('./test2');7const { Test1Builder } = require('./test1-builder');8const { Test1 } = require('./test1');9const { Test4Builder } = require('./test4-builder');10const { Test4 } = require('./test4');11const setBuilderData = prepareSetBuilderData({12  dependencies: {13  },14});15fastCheck.property(16  fastCheck.set(fastCheck.constantFrom(...setBuilderData), 1, 10),17  (data) => {18    const instance = Test3Builder.build(data);19    return instance instanceof Test3;20  },21);22fastCheck.property(23  fastCheck.set(fastCheck.constantFrom(...setBuilderData), 1, 10),24  (data) => {25    const instance = Test4Builder.build(data);26    return instance instanceof Test4;27  },28);29const fastCheck = require('fast-check');30const { Test4 } = require('./test4');31const { Test2Builder } = require('./test2-builder');32const { Test1Builder } = require('./test1-builder');33const Test4Builder = {34  build: (data) => {35    const test2 = Test2Builder.build(data);36    const test1 = Test1Builder.build(data);37    return new Test4(test2, test1);38  },39  canBuild: (data) => {40    return (41      Test2Builder.canBuild(data) && Test1Builder.canBuild(data)42    );43  },44};45module.exports = { Test4Builder };46class Test4 {47  constructor(test2, test1) {48    this.test2 = test2;49    this.test1 = test1;50  }51}52module.exports = { Test4 };

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Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.