How to use isLastChanceTry method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

ArrayInt64Arbitrary.ts

Source:ArrayInt64Arbitrary.ts

...75      //   Try the target on first try76      const target = this.defaultTarget();77      return this.shrinkArrayInt64(current, target, true);78    }79    if (this.isLastChanceTry(current, context)) {80      // Last chance try...81      // context is set to undefined, so that shrink will restart82      // without any assumptions in case our try find yet another bug83      return Stream.of(new Value(context, undefined));84    }85    // Normal shrink process86    return this.shrinkArrayInt64(current, context, false);87  }88  private defaultTarget(): ArrayInt64 {89    // min <= 0 && max >= 0   => shrink towards zero90    if (!isStrictlyPositive64(this.min) && !isStrictlyNegative64(this.max)) {91      return Zero64;92    }93    // min < 0                => shrink towards max (closer to zero)94    // otherwise              => shrink towards min (closer to zero)95    return isStrictlyNegative64(this.min) ? this.max : this.min;96  }97  private isLastChanceTry(current: ArrayInt64, context: ArrayInt64): boolean {98    // Last chance corresponds to scenario where shrink should be empty99    // But we try a last thing just in case it can work100    if (isZero64(current)) {101      return false;102    }103    if (current.sign === 1) {104      return isEqual64(current, add64(context, Unit64)) && isStrictlyPositive64(substract64(current, this.min));105    } else {106      return isEqual64(current, substract64(context, Unit64)) && isStrictlyNegative64(substract64(current, this.max));107    }108  }109  private static isValidContext(_current: ArrayInt64, context?: unknown): context is ArrayInt64 {110    // Context contains a value between zero and current that is known to be111    // the closer to zero passing value*....

IntegerArbitrary.ts

Source:IntegerArbitrary.ts

...32      //   Try the target on first try33      const target = this.defaultTarget();34      return shrinkInteger(current, target, true);35    }36    if (this.isLastChanceTry(current, context)) {37      // Last chance try...38      // context is set to undefined, so that shrink will restart39      // without any assumptions in case our try find yet another bug40      return Stream.of(new Value(context, undefined));41    }42    // Normal shrink process43    return shrinkInteger(current, context, false);44  }45  private defaultTarget(): number {46    // min <= 0 && max >= 0   => shrink towards zero47    if (this.min <= 0 && this.max >= 0) {48      return 0;49    }50    // min < 0                => shrink towards max (closer to zero)51    // otherwise              => shrink towards min (closer to zero)52    return this.min < 0 ? this.max : this.min;53  }54  private computeGenerateRange(mrng: Random, biasFactor: number | undefined): { min: number; max: number } {55    if (biasFactor === undefined || mrng.nextInt(1, biasFactor) !== 1) {56      return { min: this.min, max: this.max };57    }58    const ranges = biasNumericRange(this.min, this.max, integerLogLike);59    if (ranges.length === 1) {60      return ranges[0];61    }62    const id = mrng.nextInt(-2 * (ranges.length - 1), ranges.length - 2); // 1st range has the highest priority63    return id < 0 ? ranges[0] : ranges[id + 1];64  }65  private isLastChanceTry(current: number, context: number): boolean {66    // If true...67    // We already reached what we thought to be the minimal failing value.68    // But in-between other values may have shrunk (values coming from other arbitraries).69    // In order to check if they impacted us, we just try to move very close to our current value.70    // It is not ideal but it can help restart a shrinking process that stopped too early.71    if (current > 0) return current === context + 1 && current > this.min;72    if (current < 0) return current === context - 1 && current < this.max;73    return false;74  }75  private static isValidContext(current: number, context?: unknown): context is number {76    // Context contains a value between zero and current that is known to be77    // the closer to zero passing value*.78    // *More precisely: our shrinker will not try something closer to zero79    if (context === undefined) {...

BigIntArbitrary.ts

Source:BigIntArbitrary.ts

...35      //   Try the target on first try36      const target = this.defaultTarget();37      return shrinkBigInt(current, target, true);38    }39    if (this.isLastChanceTry(current, context)) {40      // Last chance try...41      // context is set to undefined, so that shrink will restart42      // without any assumptions in case our try find yet another bug43      return Stream.of(new Value(context, undefined));44    }45    // Normal shrink process46    return shrinkBigInt(current, context, false);47  }48  private defaultTarget(): bigint {49    // min <= 0 && max >= 0   => shrink towards zero50    if (this.min <= 0 && this.max >= 0) {51      return BigInt(0);52    }53    // min < 0                => shrink towards max (closer to zero)54    // otherwise              => shrink towards min (closer to zero)55    return this.min < 0 ? this.max : this.min;56  }57  private isLastChanceTry(current: bigint, context: bigint): boolean {58    // Last chance corresponds to scenario where shrink should be empty59    // But we try a last thing just in case it can work60    if (current > 0) return current === context + BigInt(1) && current > this.min;61    if (current < 0) return current === context - BigInt(1) && current < this.max;62    return false;63  }64  private static isValidContext(current: bigint, context?: unknown): context is bigint {65    // Context contains a value between zero and current that is known to be66    // the closer to zero passing value*.67    // *More precisely: our shrinker will not try something closer to zero68    if (context === undefined) {69      return false;70    }71    if (typeof context !== 'bigint') {...

Using AI Code Generation

1const fc = require('fast-check');2const { isLastChanceTry } = require('fast-check/lib/check/arbitrary/definition/PreconditionFailure.js');3const myArb = fc.oneof(4    fc.constantFrom('a', 'b', 'c'),5    fc.constantFrom('d', 'e', 'f')6);7fc.assert(8    fc.property(myArb, (value) => {9        const precondFail = isLastChanceTry(value);10        console.log(precondFail);11        return true;12    })13);14const fc = require('fast-check');15const { isLastChanceTry } = require('fast-check/lib/check/arbitrary/definition/PreconditionFailure.js');16const myArb = fc.oneof(17    fc.constantFrom('a', 'b', 'c'),18    fc.constantFrom('d', 'e', 'f')19);20fc.assert(21    fc.property(myArb, (value) => {22        const precondFail = isLastChanceTry(value);23        console.log(precondFail);24        return true;25    })26);27const fc = require('fast-check');28const { isLastChanceTry } = require('fast-check/lib/check/arbitrary/definition/PreconditionFailure.js');29const myArb = fc.oneof(30    fc.constantFrom('a', 'b', 'c'),31    fc.constantFrom('d', 'e', 'f')32);33fc.assert(34    fc.property(myArb, (value) => {35        const precondFail = isLastChanceTry(value);36        console.log(precondFail);37        return true;38    })39);

Using AI Code Generation

1import { check, property } from "fast-check";2import { isLastChanceTry } from "fast-check/lib/check/model/RunDetails";3const isLastChanceTryTest = check(4  property([1, 2, 3, 4], (list) => {5    const isLastChance = isLastChanceTry(list);6    return isLastChance;7  })8);9isLastChanceTryTest.then((v) => console.log(v));10import { check, property } from "fast-check";11describe("test", () => {12  it("test", () => {13    const isLastChanceTryTest = check(14      property([1, 2, 3, 4], (list) => {15        const isLastChance = isLastChanceTry(list);16        return isLastChance;17      })18    );19    isLastChanceTryTest.then((v) => console.log(v));20  });21});

Using AI Code Generation

1const fc = require('fast-check')2const { isLastChanceTry } = require('fast-check/lib/check/runner/Runner')3describe('test', () => {4  it('test', () => {5    fc.assert(6      fc.property(7        fc.nat(),8        fc.nat(),9        (n, m) => {10          if (isLastChanceTry()) {11          }12        },13        { numRuns: 1000 }14  })15})

Using AI Code Generation

1const fc = require('fast-check');2const { RunnerSettings } = require('fast-check/lib/check/runner/RunnerSettings');3const settings = new RunnerSettings({4});5const isLastChanceTry = settings.isLastChanceTry.bind(settings);6const isLastChanceTry2 = settings.isLastChanceTry.bind(settings);7const isLastChanceTry3 = settings.isLastChanceTry.bind(settings);8const isLastChanceTry4 = settings.isLastChanceTry.bind(settings);9const isLastChanceTry5 = settings.isLastChanceTry.bind(settings);10const isLastChanceTry6 = settings.isLastChanceTry.bind(settings);11const isLastChanceTry7 = settings.isLastChanceTry.bind(settings);12const isLastChanceTry8 = settings.isLastChanceTry.bind(settings);13const isLastChanceTry9 = settings.isLastChanceTry.bind(settings);14const isLastChanceTry10 = settings.isLastChanceTry.bind(settings);15const isLastChanceTry11 = settings.isLastChanceTry.bind(settings);16const isLastChanceTry12 = settings.isLastChanceTry.bind(settings);17const isLastChanceTry13 = settings.isLastChanceTry.bind(settings);18const isLastChanceTry14 = settings.isLastChanceTry.bind(settings);19const isLastChanceTry15 = settings.isLastChanceTry.bind(settings);20const isLastChanceTry16 = settings.isLastChanceTry.bind(settings);21const isLastChanceTry17 = settings.isLastChanceTry.bind(settings);22const isLastChanceTry18 = settings.isLastChanceTry.bind(settings);23const isLastChanceTry19 = settings.isLastChanceTry.bind(settings);24const isLastChanceTry20 = settings.isLastChanceTry.bind(settings);25const isLastChanceTry21 = settings.isLastChanceTry.bind(settings);26const isLastChanceTry22 = settings.isLastChanceTry.bind(settings);27const isLastChanceTry23 = settings.isLastChanceTry.bind(settings);28const isLastChanceTry24 = settings.isLastChanceTry.bind(settings);29const isLastChanceTry25 = settings.isLastChanceTry.bind(settings);30const isLastChanceTry26 = settings.isLastChanceTry.bind(settings

Using AI Code Generation

1const fc = require('fast-check');2const isLastChanceTry = (ctx) => {3  return ctx.numRuns === ctx.maxNumRuns - 1;4};5fc.assert(6  fc.property(fc.integer(), (num) => {7    return isLastChanceTry(num);8  })9);10const fc = require('fast-check');11const isLastChanceTry = (ctx) => {12  return ctx.numRuns === ctx.maxNumRuns - 1;13};14fc.assert(15  fc.property(fc.integer(), (num) => {16    return isLastChanceTry(num);17  })18);19const fc = require('fast-check');20const isLastChanceTry = (ctx) => {21  return ctx.numRuns === ctx.maxNumRuns - 1;22};23fc.assert(24  fc.property(fc.integer(), (num) => {25    return isLastChanceTry(num);26  })27);28const fc = require('fast-check');29const isLastChanceTry = (ctx) => {30  return ctx.numRuns === ctx.maxNumRuns - 1;31};32fc.assert(33  fc.property(fc.integer(), (num) => {34    return isLastChanceTry(num);35  })36);37const fc = require('fast-check');38const isLastChanceTry = (ctx) => {39  return ctx.numRuns === ctx.maxNumRuns - 1;40};41fc.assert(42  fc.property(fc.integer(), (num) => {43    return isLastChanceTry(num);44  })45);46const fc = require('fast-check');

Using AI Code Generation

1const fc = require('fast-check');2const isLastChanceTry = fc.isLastChanceTry;3const arb = fc.integer(-100, 100).filter(x => x % 3 === 0);4const out = arb.generate(fc.randomForTests(123));5console.log(out);6console.log(isLastChanceTry(out));7const out2 = arb.generate(fc.randomForTests(123));8console.log(out2);9console.log(isLastChanceTry(out2));10const out3 = arb.generate(fc.randomForTests(123));11console.log(out3);12console.log(isLastChanceTry(out3));13const out4 = arb.generate(fc.randomForTests(123));14console.log(out4);15console.log(isLastChanceTry(out4));16const out5 = arb.generate(fc.randomForTests(123));17console.log(out5);18console.log(isLastChanceTry(out5));19const out6 = arb.generate(fc.randomForTests(123));20console.log(out6);21console.log(isLastChanceTry(out6));22const out7 = arb.generate(fc.randomForTests(123));23console.log(out7);24console.log(isLastChanceTry(out7));25const out8 = arb.generate(fc.randomForTests(123));26console.log(out8);27console.log(isLastChanceTry(out8));28const out9 = arb.generate(fc.randomForTests(123));29console.log(out9);30console.log(isLastChanceTry(out9));31const out10 = arb.generate(fc.randomForTests(123));32console.log(out10);33console.log(isLastChanceTry(out10));34const out11 = arb.generate(fc.randomForTests(123));35console.log(out11);36console.log(isLastChanceTry(out11));37const out12 = arb.generate(fc.randomForTests(123));38console.log(out12);39console.log(isLastChanceTry(out12));40const out13 = arb.generate(fc.randomForTests(123));41console.log(out13);42console.log(isLastChanceTry(out13));43const out14 = arb.generate(fc.randomForTests(123));44console.log(out14);45console.log(isLastChanceTry(out14));46const out15 = arb.generate(fc.randomForTests(123));47console.log(out15);48console.log(isLastChanceTry(out15));49const out16 = arb.generate(fc.randomForTests(123));50console.log(out16);51console.log(isLastChanceTry(out16));52const out17 = arb.generate(fc.randomForTests(123));53console.log(out17);54console.log(isLastChanceTry(out17));

Using AI Code Generation

1const fc = require('fast-check');2const isLastChanceTry = fc.isLastChanceTry;3const arb = fc.nat();4const sample = arb.sample();5const shrink = arb.shrink(sample);6console.log('sample', sample);7console.log('shrink', shrink);8console.log('isLastChanceTry', isLastChanceTry());

Using AI Code Generation

1import { isLastChanceTry } from "fast-check";2function myFunction() {3  if (isLastChanceTry()) {4    console.log("Last chance try");5  }6}7myFunction();8import { isLastChanceTry } from "fast-check";9function myFunction() {10  if (isLastChanceTry()) {11    console.log("Last chance try");12  }13}14myFunction();15import { isLastChanceTry } from "fast-check";16function myFunction() {17  if (isLastChanceTry()) {18    console.log("Last chance try");19  }20}21myFunction();22import { isLastChanceTry } from "fast-check";23function myFunction() {24  if (isLastChanceTry()) {25    console.log("Last chance try");26  }27}28myFunction();29import { isLastChanceTry } from "fast-check";30function myFunction() {31  if (isLastChanceTry()) {32    console.log("Last chance try");33  }34}35myFunction();36import { isLastChanceTry } from "fast-check";37function myFunction() {38  if (isLastChanceTry()) {39    console.log("Last chance try");40  }41}42myFunction();43import { isLastChanceTry } from "fast-check";44function myFunction() {45  if (isLastChanceTry()) {46    console.log("Last chance try");47  }48}49myFunction();

Using AI Code Generation

1const fc = require('fast-check');2const { Runner } = require('fast-check/lib/check/runner/Runner');3const runner = new Runner();4const property = fc.property(fc.integer(), fc.integer(), (a, b) => a + b === b + a);5const property2 = fc.property(fc.integer(), fc.integer(), (a, b) => a + b === b + a + 1);6runner.check(property, { numRuns: 1000 });7runner.check(property2, { numRuns: 1000 });8console.log(runner.isLastChanceTry(property));9console.log(runner.isLastChanceTry(property2));

Using AI Code Generation

1var fc = require('fast-check');2var assert = require('assert');3var myProp = fc.property(fc.integer(), function (x) {4  if (fc.isLastChanceTry()) {5    console.log('Last chance try of myProp');6  }7  return x === x;8});9fc.assert(myProp, { numRuns: 10 });

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