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Merge pull request #69 from someyoungideas/isIntegers

initial commit implementing isIntegers

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Original file line number	Diff line number	Diff line change
`@@ -68,7 +68,7 @@ List of possible functions and their implementation status, compiled by [@D1esel`
`68`	`68`	`General Types:`
`69`	`69`
`70`	`70`	`- [ ] Natural numbers`
`71`		`-- [] Integers`
	`71`	`+- [x] Integers`
`72`	`72`	`- [ ] Rational numbers`
`73`	`73`	`- [ ] Irrational numbers`
`74`	`74`	`- [ ] Real numbers`

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`@@ -16,6 +16,7 @@ module.exports = Object.assign(`
`16`	`16`	`require('./lib/floatPrecise.js'),`
`17`	`17`	`require('./lib/isAscending.js'),`
`18`	`18`	`require('./lib/isDescending.js'),`
	`19`	`+ require('./lib/isIntegers.js'),`
`19`	`20`	`require('./lib/isPrime.js'),`
`20`	`21`	`require('./lib/isComposit.js'),`
`21`	`22`	`require('./lib/maximum.js'),`

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`@@ -0,0 +1,13 @@`
	`1`	`+/**`
	`2`	`+ * This function evaluates whether all parameters are integers`
	`3`	`+ * @memberof variadic`
	`4`	`+ * @author someyoungideas`
	`5`	`+ * @param {...*} params - One or more parameters.`
	`6`	`+ */`
	`7`	`+exports.isIntegers = (...params) => {`
	`8`	`+ if (params.length === 0) throw Error('Please provide at least one number to evaluate isInteger.');`
	`9`	`+ if (params.some(param => Number.isNaN(Number.parseFloat(param)))) throw Error('Please provide all numbers to evaluate isInteger.');`
	`10`	`+ if (params.some(param => !Number.isInteger(Number.parseFloat(param)))) return false;`
	`11`	`+`
	`12`	`+ return true;`
	`13`	`+};`

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`@@ -0,0 +1,32 @@`
	`1`	`+const { isIntegers } = require('../lib/isIntegers');`
	`2`	`+`
	`3`	`+describe('isIntegers', () => {`
	`4`	`+ it('should throw an error if no parameters are provided', () => {`
	`5`	`+ expect(() => isIntegers()).toThrow();`
	`6`	`+ });`
	`7`	`+`
	`8`	`+ it('should throw an error if any parameters provided are not numbers', () => {`
	`9`	`+ expect(() => isIntegers('')).toThrow();`
	`10`	`+ expect(() => isIntegers('test', 2)).toThrow();`
	`11`	`+ });`
	`12`	`+`
	`13`	`+ it('should return false if any parameters are not an integer', () => {`
	`14`	`+ expect(isIntegers(2.5)).toBe(false);`
	`15`	`+ expect(isIntegers(2, 2.5)).toBe(false);`
	`16`	`+ });`
	`17`	`+`
	`18`	`+ it('should return true if all parameters are integers', () => {`
	`19`	`+ expect(isIntegers(0)).toBe(true);`
	`20`	`+ expect(isIntegers(2)).toBe(true);`
	`21`	`+ expect(isIntegers(-1)).toBe(true);`
	`22`	`+ expect(isIntegers(-1, 0, 2)).toBe(true);`
	`23`	`+ });`
	`24`	`+`
	`25`	`+ it('should return true if all parameters can parse to integer', () => {`
	`26`	`+ expect(isIntegers('0')).toBe(true);`
	`27`	`+ expect(isIntegers('2')).toBe(true);`
	`28`	`+ expect(isIntegers('-1')).toBe(true);`
	`29`	`+ expect(isIntegers('-1', '0', '2')).toBe(true);`
	`30`	`+ expect(isIntegers('-1', 0, '2')).toBe(true);`
	`31`	`+ });`
	`32`	`+});`

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