fix: infinity value throws (#476)

* serializer.js - asNumber

* Infinity.test.js

Co-authored-by: Yaki Dori <[email protected]>

Author: yaki3355

serializer.js

@@ -48,7 +48,7 @@ module.exports = class Serializer {
 
   asNumber (i) {
     const num = Number(i)
-    if (Number.isNaN(num)) {
+    if (Number.isNaN(num) || !Number.isFinite(num)) {
       throw new Error(`The value "${i}" cannot be converted to a number.`)
     } else {
       return '' + num

test/Infinity.test.js

@@ -0,0 +1,39 @@
+'use strict'
+
+const test = require('tap').test
+const build = require('..')
+
+test('Finite numbers', t => {
+  const values = [-5, 0, -0, 1.33, Math.E, Number.EPSILON, Number.MAX_SAFE_INTEGER, Number.MAX_VALUE,
+    Number.MIN_SAFE_INTEGER, Number.MIN_VALUE]
+
+  t.plan(values.length)
+
+  const schema = {
+    type: 'number'
+  }
+
+  const stringify = build(schema)
+
+  values.forEach(v => t.equal(stringify(v), JSON.stringify(v)))
+})
+
+test('Infinite numbers', t => {
+  const values = [Infinity, -Infinity]
+
+  t.plan(values.length)
+
+  const schema = {
+    type: 'number'
+  }
+
+  const stringify = build(schema)
+
+  values.forEach(v => {
+    try {
+      stringify(v)
+    } catch (err) {
+      t.equal(err.message, `The value "${v}" cannot be converted to a number.`)
+    }
+  })
+})