fix: date from integer, #125

src/builtin/filters/date.ts

@@ -1,13 +1,15 @@
 import strftime from '../../util/strftime'
-import { isString } from '../../util/underscore'
+import { isString, isNumber } from '../../util/underscore'
 
 export default {
   'date': (v: string | Date, arg: string) => {
     let date = v
     if (v === 'now') {
       date = new Date()
+    } else if (isNumber(v)) {
+      date = new Date(v * 1000)
     } else if (isString(v)) {
-      date = new Date(v)
+      date = /^\d+$/.test(v) ? new Date(+v * 1000) : new Date(v)
     }
     return isValidDate(date) ? strftime(date, arg) : v
   }

src/builtin/tags/decrement.ts

@@ -3,6 +3,7 @@ import { identifier } from '../../parser/lexical'
 import TagToken from '../../parser/tag-token'
 import Context from '../../context/context'
 import ITagImplOptions from '../../template/tag/itag-impl-options'
+import { isNumber } from '../../util/underscore'
 
 export default {
   parse: function (token: TagToken) {
@@ -12,7 +13,7 @@ export default {
   },
   render: function (context: Context) {
     const scope = context.environments
-    if (typeof scope[this.variable] !== 'number') {
+    if (!isNumber(scope[this.variable])) {
       scope[this.variable] = 0
     }
     return --scope[this.variable]

src/builtin/tags/increment.ts

@@ -1,5 +1,6 @@
 import assert from '../../util/assert'
 import { identifier } from '../../parser/lexical'
+import { isNumber } from '../../util/underscore'
 import ITagImplOptions from '../../template/tag/itag-impl-options'
 
 export default {
@@ -10,7 +11,7 @@ export default {
   },
   render: function (context) {
     const scope = context.environments
-    if (typeof scope[this.variable] !== 'number') {
+    if (!isNumber(scope[this.variable])) {
       scope[this.variable] = 0
     }
     const val = scope[this.variable]

src/util/underscore.ts

@@ -37,6 +37,10 @@ export function toValue (value: any): any {
   return value instanceof Drop ? value.valueOf() : value
 }
 
+export function isNumber (value: any): value is number {
+  return typeof value === 'number'
+}
+
 export function toLiquid (value: any): any {
   if (isFunction(value.toLiquid)) return toLiquid(value.toLiquid())
   return value