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How to use computeNegDepthBenefit method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

FrequencyArbitrary.ts

Source:FrequencyArbitrary.ts

...62    if (this.mustGenerateFirst()) {63      // index=0 can be selected even if it has a weight equal to zero64      return this.safeGenerateForIndex(mrng, 0, biasFactor);65    }66    const selected = mrng.nextInt(this.computeNegDepthBenefit(), this.totalWeight - 1);67    for (let idx = 0; idx !== this.cumulatedWeights.length; ++idx) {68      if (selected < this.cumulatedWeights[idx]) {69        return this.safeGenerateForIndex(mrng, idx, biasFactor);70      }71    }72    throw new Error(`Unable to generate from fc.frequency`);73  }74  canShrinkWithoutContext(value: unknown): value is T {75    return this.canShrinkWithoutContextIndex(value) !== -1;76  }77  shrink(value: T, context?: unknown): Stream<Value<T>> {78    if (context !== undefined) {79      const safeContext = context as _FrequencyArbitraryContext<T>;80      const selectedIndex = safeContext.selectedIndex;81      const originalBias = safeContext.originalBias;82      const originalArbitrary = this.warbs[selectedIndex].arbitrary;83      const originalShrinks = originalArbitrary84        .shrink(value, safeContext.originalContext)85        .map((v) => this.mapIntoValue(selectedIndex, v, null, originalBias));86      if (safeContext.clonedMrngForFallbackFirst !== null) {87        if (safeContext.cachedGeneratedForFirst === undefined) {88          safeContext.cachedGeneratedForFirst = this.safeGenerateForIndex(89            safeContext.clonedMrngForFallbackFirst,90            0,91            originalBias92          );93        }94        const valueFromFirst = safeContext.cachedGeneratedForFirst;95        return Stream.of(valueFromFirst).join(originalShrinks);96      }97      return originalShrinks;98    }99    const potentialSelectedIndex = this.canShrinkWithoutContextIndex(value);100    if (potentialSelectedIndex === -1) {101      return Stream.nil(); // No arbitrary found to accept this value102    }103    return this.defaultShrinkForFirst(potentialSelectedIndex).join(104      this.warbs[potentialSelectedIndex].arbitrary105        .shrink(value, undefined) // re-checked by canShrinkWithoutContextIndex106        .map((v) => this.mapIntoValue(potentialSelectedIndex, v, null, undefined))107    );108  }109  /** Generate shrink values for first arbitrary when no context and no value was provided */110  private defaultShrinkForFirst(selectedIndex: number): Stream<Value<T>> {111    ++this.context.depth; // increase depth112    try {113      if (!this.mustFallbackToFirstInShrink(selectedIndex) || this.warbs[0].fallbackValue === undefined) {114        // Not applicable: no fallback to first arbitrary on shrink OR no hint to shrink without an initial value and context115        return Stream.nil();116      }117    } finally {118      --this.context.depth; // decrease depth (reset depth)119    }120    // The arbitrary at [0] accepts to shrink fallbackValue.default without any context (context=undefined)121    const rawShrinkValue = new Value(this.warbs[0].fallbackValue.default, undefined);122    return Stream.of(this.mapIntoValue(0, rawShrinkValue, null, undefined));123  }124  /** Extract the index of the generator that would have been able to gennrate the value */125  private canShrinkWithoutContextIndex(value: unknown): number {126    if (this.mustGenerateFirst()) {127      return this.warbs[0].arbitrary.canShrinkWithoutContext(value) ? 0 : -1;128    }129    try {130      ++this.context.depth; // increase depth131      for (let idx = 0; idx !== this.warbs.length; ++idx) {132        const warb = this.warbs[idx];133        if (warb.weight !== 0 && warb.arbitrary.canShrinkWithoutContext(value)) {134          return idx;135        }136      }137      return -1;138    } finally {139      --this.context.depth; // decrease depth (reset depth)140    }141  }142  /** Map the output of one of the children with the context of frequency */143  private mapIntoValue(144    idx: number,145    value: Value<T>,146    clonedMrngForFallbackFirst: Random | null,147    biasFactor: number | undefined148  ): Value<T> {149    const context: _FrequencyArbitraryContext<T> = {150      selectedIndex: idx,151      originalBias: biasFactor,152      originalContext: value.context,153      clonedMrngForFallbackFirst,154    };155    return new Value(value.value, context);156  }157  /** Generate using Arbitrary at index idx and safely handle depth context */158  private safeGenerateForIndex(mrng: Random, idx: number, biasFactor: number | undefined): Value<T> {159    ++this.context.depth; // increase depth160    try {161      const value = this.warbs[idx].arbitrary.generate(mrng, biasFactor);162      const clonedMrngForFallbackFirst = this.mustFallbackToFirstInShrink(idx) ? mrng.clone() : null;163      return this.mapIntoValue(idx, value, clonedMrngForFallbackFirst, biasFactor);164    } finally {165      --this.context.depth; // decrease depth (reset depth)166    }167  }168  /** Check if generating a value based on the first arbitrary is compulsory */169  private mustGenerateFirst(): boolean {170    return this.constraints.maxDepth <= this.context.depth;171  }172  /** Check if fallback on first arbitrary during shrinking is required */173  private mustFallbackToFirstInShrink(idx: number): boolean {174    return idx !== 0 && this.constraints.withCrossShrink && this.warbs[0].weight !== 0;175  }176  /** Compute the benefit for the current depth */177  private computeNegDepthBenefit(): number {178    const depthBias = this.constraints.depthBias;179    if (depthBias <= 0 || this.warbs[0].weight === 0) {180      return 0;181    }182    // We use a pow-based biased benefit as the deeper we go the more chance we have183    // to encounter thousands of instances of the current arbitrary.184    const depthBenefit = safeMathFloor(safeMathPow(1 + depthBias, this.context.depth)) - 1;185    // -0 has to be converted into 0 thus we call ||0186    return -safeMathMin(this.totalWeight * depthBenefit, safeMaxSafeInteger) || 0;187  }188}189/** @internal */190export type _Constraints = {191  withCrossShrink?: boolean;...

Using AI Code Generation

1const { computeNegDepthBenefit } = require("fast-check");2const result = computeNegDepthBenefit(1, 1, 1);3console.log(result);4const { computeNegDepthBenefit } = require("fast-check");5const result = computeNegDepthBenefit(1, 1, 1);6console.log(result);7const path = require("path");8const moduleAlias = require("module-alias");9moduleAlias.addAlias(10  path.join(__dirname, "../node_modules/fast-check-monorepo/node_modules/fast-check")11);

Using AI Code Generation

1const fc = require('fast-check');2const { computeNegDepthBenefit, computeDepthBenefit } = require('fast-check/src/check/runner/Runner');3const { computeDepth } = require('fast-check/src/check/runner/ExecutionPath');4const { ExecutionPath } = require('fast-check/src/check/runner/ExecutionPath');5const { computeDepth } = require('fast-check/src/check/runner/ExecutionPath');6const { ExecutionPath } = require('fast-check/src/check/runner/ExecutionPath');7const { computeDepth } = require('fast-check/src/check/runner/ExecutionPath');8const { ExecutionPath } = require('fast-check/src/check/runner/ExecutionPath');9const { computeDepth } = require('fast-check/src/check/runner/ExecutionPath');10const { ExecutionPath } = require('fast-check/src/check/runner/ExecutionPath');11const { computeDepth } = require('fast-check/src/check/runner/ExecutionPath');12const { ExecutionPath } = require('fast-check/src/check/runner/ExecutionPath');13console.log('Hello, world!');14const fc = require('fast-check');15const { computeNegDepthBenefit, computeDepthBenefit } = require('fast-check/src/check/runner/Runner');16const { computeDepth } = require('fast-check/src/check/runner/ExecutionPath');17const { ExecutionPath } = require('fast-check/src/check/runner/ExecutionPath');18const { computeDepth } = require('fast-check/src/check/runner/ExecutionPath');19const { ExecutionPath } = require('fast-check/src/check/runner/ExecutionPath');20const { computeDepth } = require('fast-check/src/check/runner/ExecutionPath');21const { ExecutionPath } = require('fast-check/src/check/runner/ExecutionPath');22const { computeDepth } = require('fast-check/src/check/runner/ExecutionPath');23const { ExecutionPath } = require('fast-check/src/check/runner/ExecutionPath');24const { computeDepth } =

Using AI Code Generation

1const fastCheck = require('fast-check');2const computeNegDepthBenefit = fastCheck.computeNegDepthBenefit;3console.log(computeNegDepthBenefit(10, 100));4import { computeNegDepthBenefit } from 'fast-check';5console.log(computeNegDepthBenefit(10, 100));6import * as fastCheck from 'fast-check';7SyntaxError: Cannot use import statement outside a module8    at Module._compile (internal/modules/cjs/loader.js:1138:14)9    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1158:10)10    at Module.load (internal/modules/cjs/loader.js:986:32)11    at Function.Module._load (internal/modules/cjs/loader.js:879:14)12    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12)13const fastCheck = require('fast-check');14    at Module._compile (internal/modules/cjs/loader.js:1138:14)15    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1158:10)16    at Module.load (internal/modules/cjs/loader.js:986:32)17    at Function.Module._load (internal/modules/cjs/loader.js:879:14)18    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12)19const fastCheck = require('fast-check');20    at Module._compile (internal/modules/cjs/loader.js:1138:14)

Using AI Code Generation

1import { computeNegDepthBenefit } from 'fast-check-monorepo';2console.log(computeNegDepthBenefit(5, 10));3import { computeNegDepthBenefit } from 'fast-check-monorepo';4console.log(computeNegDepthBenefit(10, 5));5import { computeNegDepthBenefit } from 'fast-check-monorepo';6console.log(computeNegDepthBenefit(10, 10));7import { computeNegDepthBenefit } from 'fast-check-monorepo';8console.log(computeNegDepthBenefit(0, 10));9import { computeNegDepthBenefit } from 'fast-check-monorepo';10console.log(computeNegDepthBenefit(10, 0));11import { computeNegDepthBenefit } from 'fast-check-monorepo';12console.log(computeNegDepthBenefit(-10, 10));13import { computeNegDepthBenefit } from 'fast-check-monorepo';14console.log(computeNegDepthBenefit(10, -10));15import { computeNegDepthBenefit } from 'fast-check-monorepo';16console.log(computeNegDepthBenefit(-10, -10));17import { computeNegDepthBenefit } from 'fast-check-monorepo';

Using AI Code Generation

1import { computeNegDepthBenefit } from 'fast-check-monorepo';2import { Arbitrary } from 'fast-check-monorepo';3import { integer } from 'fast-check-monorepo';4const arbitrary = integer(0, 100).map((v) => -v);5const negDepthBenefit = computeNegDepthBenefit(arbitrary);6console.log(negDepthBenefit);7import { computeNegDepthBenefit } from 'fast-check-monorepo';8import { Arbitrary } from 'fast-check-monorepo';9import { integer } from 'fast-check-monorepo';10const arbitrary = integer(0, 100).map((v) => -v);11const negDepthBenefit = computeNegDepthBenefit(arbitrary);12console.log(negDepthBenefit);13import { computeNegDepthBenefit } from 'fast-check-monorepo';14import { Arbitrary } from 'fast-check-monorepo';15import { integer } from 'fast-check-monorepo';16const arbitrary = integer(0, 100).map((v) => -v);17const negDepthBenefit = computeNegDepthBenefit(arbitrary);18console.log(negDepthBenefit);19import { computeNegDepthBenefit } from 'fast-check-monorepo';20import { Arbitrary } from 'fast-check-monorepo';21import { integer } from 'fast-check-monorepo';

Using AI Code Generation

1const computeNegDepthBenefit = require('fast-check-monorepo').computeNegDepthBenefit2const node = {depth: 2, benefit: 3, negDepthBenefit: 0}3const result = computeNegDepthBenefit(node)4console.log(result)5const computeNegDepthBenefit = require('fast-check-monorepo').computeNegDepthBenefit6const node = {depth: 2, benefit: 3, negDepthBenefit: 0}7const result = computeNegDepthBenefit(node)8console.log(result)9const computeNegDepthBenefit = require('fast-check-monorepo').computeNegDepthBenefit10const node = {depth: 2, benefit: 3, negDepthBenefit: 0}11const result = computeNegDepthBenefit(node)12console.log(result)13const computeNegDepthBenefit = require('fast-check-monorepo').computeNegDepthBenefit14const node = {depth: 2, benefit: 3, negDepthBenefit: 0}15const result = computeNegDepthBenefit(node)16console.log(result)

Using AI Code Generation

1const { check } = require('fast-check');2const { computeNegDepthBenefit } = require('fast-check-monorepo');3const numberOfValues = 1000;4const numberOfIterations = 1000;5const benefit = computeNegDepthBenefit(numberOfValues, numberOfIterations);6console.log("Benefit of using negative depth:", benefit);

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