exp-mock

Parse expressions and generate mock data.

This library mainly contains three functions.

DEMO

const {mockExp, parseExp, getFakerObject} = require('exp-mock');

_.forEach([
    '{{$mockjs.telephone|padStart(0,text)}}', 
    `{{'123aBcD'|upper|length}}`, 
    `{{123|concat(dsadsad)|upper|length}}`, 
    `{{$fakerjs.word.adjective(min=3,max=7)|concat(text)}}`, 
    `{{name|md5|sha1}}`
], (item) => {
    console.log(item,'==>',mockExp(item, { name: "John" },'ja'))
});

Localization support

The third parameter specifies the localization language pack. The currently supported languages include:

• zh-ch: Simplified Chinese
• zh-tw: Traditional Chinese
• en: English
• ja: Japanese
• de: German
• fr: French
• id: Indonesian

parseExp

This function converts a string like {{$mockjs.telephone(1,100)|padStart(0,text)}} into an object, making it easier to render and edit in the UI. Here are some examples:

{{$mockjs.telephone(1,100)|padStart(0,text)}} ==> {
    "dist": {
        "type": "mockjs",
        "expression": "@telephone(1,100)",
        "value": "15831593361"
    },
    "functions": [
        {
            "function": "padStart",
            "paras": {
                "length": 0,
                "text": "text"
            },
            "tmpValue": "15831593361"
        }
    ]
}
{{'123aBcD'|upper|length}} ==> {
    "dist": {
        "type": "fixed",
        "expression": "123aBcD",
        "value": 7
    },
    "functions": [
        {
            "function": "upper",
            "paras": {},
            "tmpValue": "123ABCD"
        },
        {
            "function": "length",
            "paras": {},
            "tmpValue": 7
        }
    ]
}
{{123|concat(dsadsad)|upper|length}} ==> {
    "dist": {
        "type": "fixed",
        "expression": "123",
        "value": 10
    },
    "functions": [
        {
            "function": "concat",
            "paras": {
                "text": "dsadsad"
            },
            "tmpValue": "123dsadsad"
        },
        {
            "function": "upper",
            "paras": {},
            "tmpValue": "123DSADSAD"
        },
        {
            "function": "length",
            "paras": {},
            "tmpValue": 10
        }
    ]
}
{{$fakerjs.word.adjective(min=3,max=7)|concat(text)}} ==> {
    "dist": {
        "type": "fakerjs",
        "expression": {
            "module": "Word",
            "function": "adjective",
            "paras": {
                "length": {
                    "min": 3,
                    "max": 7
                }
            }
        },
        "value": "subtletext"
    },
    "functions": [
        {
            "function": "concat",
            "paras": {
                "text": "text"
            },
            "tmpValue": "subtletext"
        }
    ]
}
{{name|md5|sha1|substr(3,2)}} ==> {
    "dist": {
        "type": "variable",
        "expression": "name",
        "value": "01"
    },
    "functions": [
        {
            "function": "md5",
            "paras": {},
            "tmpValue": "5e027396789a18c37aeda616e3d7991b"
        },
        {
            "function": "sha1",
            "paras": {},
            "tmpValue": "b560159b4838f42343708c62df126fe79ed35552"
        },
        {
            "function": "substr",
            "paras": {
                "start": 3,
                "length": 2
            },
            "tmpValue": "01"
        }
    ]
}

mockExp

This function generates preview values from strings like {{$mockjs.telephone(1,100)|padStart(0,text)}}. Here are some examples:

{{$mockjs.telephone(1,100)|padStart(0,text)}} ==> 17230215009
{{'123aBcD'|upper|length}} ==> 7
{{123|concat(dsadsad)|upper|length}} ==> 10
{{$fakerjs.word.adjective(min=3,max=7)|concat(text)}} ==> genuinetext
{{name|md5|sha1}} ==> b560159b4838f42343708c62df126fe79ed35552

getFakerObject

This function returns an object made up of modules and methods from Faker.js. Here’s an example:

[
  {
    "module": "Airline",
    "function": "aircraftType",
    "description": {
      "zh-CN": "返回一种随机的飞机类型。",
      "zh-TW": "返回一種隨機的飛機類型。",
      "en": "Returns a random aircraft type.",
      "ja": "ランダムな航空機の種類を返します。",
      "id": "Mengembalikan jenis pesawat secara acak."
    },
    "params": {}
  },
  {
    "module": "Airline",
    "function": "airline",
    "description": {
      "zh-CN": "生成一家随机的航空公司。",
      "zh-TW": "生成一家隨機的航空公司。",
      "en": "Generates a random airline.",
      "ja": "ランダムな航空会社を生成します。",
      "id": "Menghasilkan maskapai acak."
    },
    "params": {}
  }
]