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How to use isSubstring method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

functions-spec.js

...173    assert('squareSum', squareSum([1, 2, 3]), 14);174    console.log('\n');175    // 6) Assume you have a method 'isSubstring' which checks if one word is a substring of another given word. 176    // Given two strings s1 y s2, write a function that check if s2 is a rotation of s1 using only one call to the isSubstring method.177    function isSubstring(str1, str2) {178        if (str2.length <= str1.length) {179            for (let i = 0; i < str1.length; i++) {180                if (str1.length - i < str2.length) {181                    return false;182                }183                if (str1[i] === str2[0]) {184                    for (let j = 0; j < str2.length; j++) {185                        if (str1[i + j] !== str2[j]) {186                            break;187                        }188                        if (j === str2.length - 1) {189                            return true;190                        }191                    }192                }193            }194        }195        return false;196    }197    assert('isSubstring', isSubstring('roma', 'ma'), true);198    assert('isSubstring', isSubstring('erbottlewaterbottlewat', 'waterbottle'), true);199    assert('isSubstring', isSubstring('aslkjdfhlasdhisaackjhlkjhas', 'isaac'), true);200    assert('isSubstring', isSubstring('nadaquever', 'hola'), false);201    assert('isSubstring', isSubstring('nadaholuever', 'hola'), false);202    assert('isSubstring', isSubstring('abcdefg', 'd'), true);203    assert('isSubstring', isSubstring('a', 'abcde'), false);204    assert('isSubstring', isSubstring('a', 'a'), true);205    console.log('\n');206    function isRotation(str1, str2) {207        if (str1.length !== str2.length) {208            return false;209        }210        // Duplicates the size of the string;211        str2 += str2;212        return isSubstring(str2, str1);213    }214    assert('isRotation', isRotation('waterbottle', 'erbottlewat'), true);215    assert('isRotation', isRotation('pikachu', 'achupik'), true);216    assert('isRotation', isRotation('pikachu', 'achuppik'), false);217    assert('isRotation', isRotation('pokemon', 'mompoke'), false);218    console.log('\n');219    // 7) Write a function that receives a matrix M x N, and that returns a new matrix following the next rules:220    // - If any element of the [M][N] matrix is a 0 (zero), then that entire column and row is set to 0 (zero).221    function convertMatrix(matrix) {222        let result = [];223        // copy the matrix224        let indexes = [];225        for (let y = 0; y < matrix.length; y++) {226            result[y] = [];...

stringRotation.js

Source: stringRotation.js

...7// C: only use one call to isSubstring method8// E: empty strings, spaces, equal strings9const stringRotation = (s1, s2) => {10	const double = s1.concat(s1);11	return isSubstring(double, s2);12};13// I: two strings14// O: a boolean15// C: none16// E: empty strings -> index of '' in 'aNon-emptyString' === 017// determine if s2 is a substring of s118const isSubstring = (s1, s2) => s1.indexOf(s2) !== -1;19const assertEquals = (actual, expected, testname) => {20	if (actual === expected) {21		console.log(`passed ${testname}`);22	} else {23		console.log(`FAILED ${testname}: expected "${expected}", but got "${actual}"`);24	}25};26// tests27console.log('TESTS FOR: isSubstring()');28assertEquals(isSubstring('waterbottle', 'bottle'), true, 'should return true if s2 is substring of s1');29assertEquals(isSubstring('waterbottle', 'terbots'), false, 'should return false if s2 is not substring of s1');30assertEquals(isSubstring('', ''), true, 'should return true when passed two empty strings');31assertEquals(isSubstring('waterbottle', ''), true, 'should return true when s2 is empty string and s1 is not');32console.log('');33console.log('TESTS FOR: stringRotation()');34assertEquals(stringRotation('waterbottle', 'erbottlewat'), true, 'should return true when one string is a rotation of the other');35assertEquals(stringRotation('waterbottle', 'erbotstlewat'), false, 'should return false when one string is not a rotation of the other');36assertEquals(stringRotation('', ''), true, 'should return true when given two empty strings');37assertEquals(stringRotation('', 'watterbottle'), false, 'should return false when given an empty string and a non-empty string');38assertEquals(stringRotation('waterbottle', 'waterbottle'), true, 'should return true when both strings are equal');...

ctci-1.09.test.js

Source: ctci-1.09.test.js

1const { stringRotation } = require('./ctci-1.09.js');2const isSubstring = jest.fn().mockImplementation((str1, str2) => {3  return str1.includes(str2);4});5describe('Check if two strings are rotations of each other, calling isSubstring only once', () => {6  test('Return true if strings are rotations', () => {7    isSubstring.mockClear();8    expect(stringRotation('waterbottle', 'erbottlewat', isSubstring)).toBe(true);9    expect(isSubstring).toHaveBeenCalledTimes(1);10  });11  test('Return false if strings are not rotations', () => {12    isSubstring.mockClear();13    expect(stringRotation('foo', 'bar', isSubstring)).toBe(false);14    expect(isSubstring).toHaveBeenCalledTimes(1);15  });...

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