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How to use patternsToStringUnmapperFor method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

PatternsToString.spec.ts

Source:PatternsToString.spec.ts

...30      const sourceChunksSet = new Set(sourceChunks);31      const { instance, canShrinkWithoutContext } = fakeArbitrary<string>();32      canShrinkWithoutContext.mockImplementation((value) => sourceChunksSet.has(value as string));33      // Act34      const unmapper = patternsToStringUnmapperFor(instance, constraints);35      const chunks = unmapper(source);36      // Assert37      expect(chunks).toEqual(expectedChunks);38    }39  );40  it.each`41    sourceChunks       | source     | constraints42    ${['a', 'b', 'c']} | ${'abcd'}  | ${{}}43    ${['ab', 'aaa']}   | ${'abaaa'} | ${{ minLength: 3 }}44    ${['a']}           | ${'aaaaa'} | ${{ maxLength: 4 }}45  `('should throw when string cannot be split into chunks ($constraints)', ({ sourceChunks, source, constraints }) => {46    // Arrange47    const sourceChunksSet = new Set(sourceChunks);48    const { instance, canShrinkWithoutContext } = fakeArbitrary<string>();49    canShrinkWithoutContext.mockImplementation((value) => sourceChunksSet.has(value as string));50    // Act / Assert51    const unmapper = patternsToStringUnmapperFor(instance, constraints);52    expect(() => unmapper(source)).toThrowError();53  });54  it('should be able to split strings built out of chunks into chunks', () =>55    fc.assert(56      fc.property(57        // Defining chunks, we allow "" to be part of the chunks as we do not request any minimal length for the 'split into chunks'58        fc.array(fc.fullUnicodeString(), { minLength: 1 }),59        // Array of random natural numbers to help building the source string60        fc.array(fc.nat()),61        (sourceChunks, sourceMods) => {62          // Arrange63          const sourceChunksSet = new Set(sourceChunks);64          const { instance, canShrinkWithoutContext } = fakeArbitrary<string>();65          canShrinkWithoutContext.mockImplementation((value) => sourceChunksSet.has(value as string));66          const source = sourceMods.map((mod) => sourceChunks[mod % sourceChunks.length]).join('');67          // Act68          const unmapper = patternsToStringUnmapperFor(instance, {});69          const chunks = unmapper(source);70          // Assert71          expect(chunks.join('')).toBe(source);72          // Remark: Found chunks may differ from the one we used to build the source73          // For instance:74          // >  sourceChunks = ["ToTo", "To"]75          // >  sourceMods   = [0]76          // >  chunks might be ["To", "To"] or ["ToTo"] and both are valid ones77        }78      )79    ));80  it('should be able to split strings built out of chunks into chunks while respecting constraints in size', () =>81    fc.assert(82      fc.property(83        fc.array(fc.fullUnicodeString({ minLength: 1 }), { minLength: 1 }),84        fc.array(fc.nat()),85        fc.nat(),86        fc.nat(),87        (sourceChunks, sourceMods, constraintsMinOffset, constraintsMaxOffset) => {88          // Arrange89          const sourceChunksSet = new Set(sourceChunks);90          const { instance, canShrinkWithoutContext } = fakeArbitrary<string>();91          canShrinkWithoutContext.mockImplementation((value) => sourceChunksSet.has(value as string));92          const source = sourceMods.map((mod) => sourceChunks[mod % sourceChunks.length]).join('');93          const constraints = {94            minLength: Math.max(0, sourceMods.length - constraintsMinOffset),95            maxLength: sourceMods.length + constraintsMaxOffset,96          };97          // Act98          const unmapper = patternsToStringUnmapperFor(instance, constraints);99          const chunks = unmapper(source);100          // Assert101          expect(chunks.join('')).toBe(source);102          expect(chunks.length).toBeGreaterThanOrEqual(constraints.minLength);103          expect(chunks.length).toBeLessThanOrEqual(constraints.maxLength);104        }105      )106    ));...

PatternsToString.ts

Source:PatternsToString.ts

...6export function patternsToStringMapper(tab: string[]): string {7  return safeJoin(tab, '');8}9/** @internal */10export function patternsToStringUnmapperFor(11  patternsArb: Arbitrary<string>,12  constraints: StringSharedConstraints13): (value: unknown) => string[] {14  return function patternsToStringUnmapper(value: unknown): string[] {15    // First match wins! Possibly not the best match.16    // Empty strings are not considered as valid chunks.17    // Example:18    // >  Size limit (not known here) is [min: 0, max: 2], we want to revert "abc" and both ["a","b","c"] and ["ab", "c"] are possible.19    // >  Unmap to ["a", "b", "c"] while not in [min: 0, max: 2].20    if (typeof value !== 'string') {21      throw new Error('Unsupported value');22    }23    const minLength = constraints.minLength !== undefined ? constraints.minLength : 0;24    const maxLength = constraints.maxLength !== undefined ? constraints.maxLength : MaxLengthUpperBound;...

stringOf.ts

Source:stringOf.ts

...14 * @remarks Since 1.1.315 * @public16 */17export function stringOf(charArb: Arbitrary<string>, constraints: StringSharedConstraints = {}): Arbitrary<string> {18  const unmapper = patternsToStringUnmapperFor(charArb, constraints);19  const experimentalCustomSlices = createSlicesForString(charArb, unmapper);20  // TODO - Move back to object spreading as soon as we bump support from es2017 to es2018+21  const enrichedConstraints: ArrayConstraintsInternal<string> = safeObjectAssign(safeObjectAssign({}, constraints), {22    experimentalCustomSlices,23  });24  return array(charArb, enrichedConstraints).map(patternsToStringMapper, unmapper);...

Using AI Code Generation

1const fc = require('fast-check');2const { patternsToStringUnmapperFor } = require('fast-check-monorepo');3  { pattern: '1', values: [1] },4  { pattern: '2', values: [2] },5  { pattern: '3', values: [3] },6  { pattern: '4', values: [4] },7  { pattern: '5', values: [5] },8  { pattern: '6', values: [6] },9  { pattern: '7', values: [7] },10  { pattern: '8', values: [8] },11  { pattern: '9', values: [9] },12  { pattern: '10', values: [10] },13  { pattern: '11', values: [11] },14  { pattern: '12', values: [12] },15  { pattern: '13', values: [13] },16  { pattern: '14', values: [14] },17  { pattern: '15', values: [15] },18  { pattern: '16', values: [16] },19  { pattern: '17', values: [17] },20  { pattern: '18', values: [18] },21  { pattern: '19', values: [19] },22  { pattern: '20', values: [20] },23  { pattern: '21', values: [21] },24  { pattern: '22', values: [22] },25  { pattern: '23', values: [23] },26  { pattern: '24', values: [24] },27  { pattern: '25', values: [25] },28  { pattern: '26', values: [26] },29  { pattern: '27', values: [27] },30  { pattern: '28', values: [28] },31  { pattern: '29', values: [29] },32  { pattern: '30', values: [30] },33  { pattern: '31', values: [31] },34  { pattern: '32', values: [32] },35  { pattern: '33', values: [33] },36  { pattern: '34', values: [34]

Using AI Code Generation

1const fc = require('fast-check');2const { patternsToStringUnmapperFor } = require('fast-check-monorepo');3  '(',4  ';',5  '{',6  '}',

Using AI Code Generation

1const fc = require("fast-check");2const { patternsToStringUnmapperFor } = require("fast-check-monorepo");3  { type: "literal", value: "a" },4  { type: "any" },5  { type: "literal", value: "b" },6  { type: "any" },7  { type: "literal", value: "c" },8  { type: "any" },9  { type: "literal", value: "d" },10  { type: "any" },11  { type: "literal", value: "e" },12  { type: "any" },13  { type: "literal", value: "f" },14  { type: "any" },15  { type: "literal", value: "g" },16  { type: "any" },17  { type: "literal", value: "h" },18  { type: "any" },19  { type: "literal", value: "i" },20  { type: "any" },21  { type: "literal", value: "j" },22  { type: "any" },23  { type: "literal", value: "k" },24  { type: "any" },25  { type: "literal", value: "l" },26  { type: "any" },27  { type: "literal", value: "m" },28  { type: "any" },29  { type: "literal", value: "n" },30  { type: "any" },31  { type: "literal", value: "o" },32  { type: "any" },33  { type: "literal", value: "p" },34  { type: "any" },35  { type: "literal", value: "q" },36  { type: "any" },37  { type: "literal", value: "r" },38  { type: "any" },39  { type: "literal", value: "s" },40  { type: "any" },41  { type: "literal", value: "t" },42  { type: "any" },43  { type: "literal", value: "u" },44  { type: "any" },45  { type: "literal", value: "v" },46  { type: "any" },47  { type: "literal",

Using AI Code Generation

1const fc = require('fast-check');2const { patternsToStringUnmapperFor } = require('fast-check/lib/arbitrary/_internals/mappers/PatternsToStringUnmapper');3  { type: 'literal', value: 'a' },4  { type: 'literal', value: 'b' },5  { type: 'literal', value: 'c' },6  { type: 'literal', value: 'd' },7  { type: 'literal', value: 'e' },8  { type: 'literal', value: 'f' },9  { type: 'literal', value: 'g' },10  { type: 'literal', value: 'h' },11  { type: 'literal', value: 'i' },12  { type: 'literal', value: 'j' },13  { type: 'literal', value: 'k' },14  { type: 'literal', value: 'l' },15  { type: 'literal', value: 'm' },16  { type: 'literal', value: 'n' },17  { type: 'literal', value: 'o' },18  { type: 'literal', value: 'p' },19  { type: 'literal', value: 'q' },20  { type: 'literal', value: 'r' },21  { type: 'literal', value: 's' },22  { type: 'literal', value: 't' },23  { type: 'literal', value: 'u' },24  { type: 'literal', value: 'v' },25  { type: 'literal', value: 'w' },26  { type: 'literal', value: 'x' },27  { type: 'literal', value: 'y' },28  { type: 'literal', value: 'z' },29  { type: 'literal', value: 'A' },30  { type: 'literal', value: 'B' },31  { type: 'literal', value: 'C' },32  { type: 'literal', value: 'D' },33  { type: 'literal', value: 'E' },34  { type: 'literal', value: 'F' },35  { type: 'literal', value: 'G' },36  { type: 'literal', value: 'H' },37  { type: 'literal', value: 'I' },38  { type:

Using AI Code Generation

1const fc = require("fast-check");2const { patternsToStringUnmapperFor } = require("fast-check-monorepo");3  {4    unmapper: (s) => s.replace("a", "b"),5  },6  {7    unmapper: (s) => s.replace("b", "c"),8  },9  {10    unmapper: (s) => s.replace("c", "d"),11  },12  {13    unmapper: (s) => s.replace("d", "e"),14  },15  {16    unmapper: (s) => s.replace("e", "f"),17  },18  {19    unmapper: (s) => s.replace("f", "g"),20  },21  {22    unmapper: (s) => s.replace("g", "h"),23  },24  {25    unmapper: (s) => s.replace("h", "i"),26  },27  {28    unmapper: (s) => s.replace("i", "j"),29  },30  {31    unmapper: (s) => s.replace("j", "k"),32  },33  {34    unmapper: (s) => s.replace("k", "l"),35  },36  {37    unmapper: (s) => s.replace("l", "m"),38  },39  {40    unmapper: (s) => s.replace("m", "n"),41  },42  {43    unmapper: (s) => s.replace("n", "o"),44  },45  {46    unmapper: (s) => s.replace("o", "p"),47  },48  {49    unmapper: (s) => s.replace("p", "q"),50  },51  {52    unmapper: (s) => s.replace("q", "r"),53  },54  {55    unmapper: (s) => s.replace("r", "s"),56  },

Using AI Code Generation

1import { patternsToStringUnmapperFor } from "@dubzzz/fast-check";2import { pattern } from "@dubzzz/fast-check";3const patterns = {4  a: pattern.anyValue(),5  b: pattern.anyValue(),6  c: pattern.anyValue(),7  d: pattern.anyValue(),8  e: pattern.anyValue(),9  f: pattern.anyValue(),10  g: pattern.anyValue(),11  h: pattern.anyValue(),12  i: pattern.anyValue(),13  j: pattern.anyValue(),14  k: pattern.anyValue(),15  l: pattern.anyValue(),16  m: pattern.anyValue(),17  n: pattern.anyValue(),18  o: pattern.anyValue(),19  p: pattern.anyValue(),20  q: pattern.anyValue(),21  r: pattern.anyValue(),22  s: pattern.anyValue(),23  t: pattern.anyValue(),24  u: pattern.anyValue(),25  v: pattern.anyValue(),26  w: pattern.anyValue(),27  x: pattern.anyValue(),28  y: pattern.anyValue(),29  z: pattern.anyValue(),30};31const unmapper = patternsToStringUnmapperFor(patterns);32const obj = {33};34console.log(unmapper(obj));

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