不一样的虚假(Bogus)和骗子(Faker)

首先声明，Bogus是一个Nuget包的名称，Faker是它内部的一个类，这个库的作用就是模拟生成实体类的数据，特别适合测试时的场景，不用苦思冥想，辛辛苦苦来造不同的实体类了。当然，造出来的都是虚假的(Bogus)，骗人的(Faker)。它家在这里：https://github.com/bchavez/Bogus

假如我有个会员类

    enum Sex{男,女}class Memmber{public Guid ID { get; set; }public long NO { get; set; }public string Name { get; set; }public Sex Sex { get; set; }public int Age { get; set; }public string Email { get; set; }public string Phone { get; set; }public decimal Balance { get; set; }public DateTime CreateOn { get; set; }}

这个类在测试时，要手动实例化，穿梭于各个层和方法中间，现在把构建这个类的对象(实例)，交给Bogus。

首先引入Bogus包

Install-Package Bogus

接下来就可以告诉Faker怎么来“骗人”了

var options = new JsonSerializerOptions();
options.Encoder = System.Text.Encodings.Web.JavaScriptEncoder.Create(UnicodeRanges.All);
while (true)
{var personFaker = new Faker<Memmber>().RuleFor(x => x.ID, x => x.Random.Guid()).RuleFor(x=>x.NO,x=>x.Random.Long(100000000000,999999999999)).RuleFor(x => x.Name, x => x.Person.LastName + x.Person.FirstName).RuleFor(x => x.Sex, x => x.Random.Enum<Sex>()).RuleFor(x => x.Email, x => x.Person.Email).RuleFor(x => x.Phone, x => x.Person.Phone).RuleFor(x => x.Age, x => x.Random.Int(0, 120)).RuleFor(x=>x.Balance,x=>x.Finance.Amount(0,1000))                    .RuleFor(x => x.CreateOn, x => x.Date.Past(1));Console.WriteLine(JsonSerializer.Serialize(personFaker.Generate(), options));Console.ReadLine();
}

看一下效果：

{"ID":"5f3d97f6-52da-7fb6-e73f-153fd3a41bfb","NO":539140308276,"Name":"KoeppErick","Sex":0,"Age":48,"Email":"Erick.Koepp@hotmail.com","Phone":"(899) 392-6546","Balance":45.34,"CreateOn":"2021-02-14T13:32:19.892062+09:00"
}

看来，Faker是通过RuleFor来给每个属性来模拟那种格式的数据的，比如RuleFor(x => x.Email, x => x.Person.Email)，告诉Faker，这是一个Email格式，记得骗人的时候，给人家一个email格式的数据，内容随便你，那问题来了，是不是有一大组格式呢？当然，这也是这个库的作用，都有哪些？

Bogus API Support

  • Address

    • ZipCode - Get a zipcode.

    • City - Get a city name.

    • StreetAddress - Get a street address.

    • CityPrefix - Get a city prefix.

    • CitySuffix - Get a city suffix.

    • StreetName - Get a street name.

    • BuildingNumber - Get a building number.

    • StreetSuffix - Get a street suffix.

    • SecondaryAddress - Get a secondary address like 'Apt. 2' or 'Suite 321'.

    • County - Get a county.

    • Country - Get a country.

    • FullAddress - Get a full address like Street, City, Country.

    • CountryCode - Get a random ISO 3166-1 country code.

    • State - Get a random state state.

    • StateAbbr - Get a state abbreviation.

    • Latitude - Get a Latitude.

    • Longitude - Get a Longitude.

    • Direction - Generates a cardinal or ordinal direction. IE: Northwest, South, SW, E.

    • CardinalDirection - Generates a cardinal direction. IE: North, South, E, W.

    • OrdinalDirection - Generates an ordinal direction. IE: Northwest, Southeast, SW, NE.

  • Commerce

    • Department - Get a random commerce department.

    • Price - Get a random product price.

    • Categories - Get random product categories.

    • ProductName - Get a random product name.

    • Color - Get a random color.

    • Product - Get a random product.

    • ProductAdjective - Random product adjective.

    • ProductMaterial - Random product material.

    • Ean8 - Get a random EAN-8 barcode number.

    • Ean13 - Get a random EAN-13 barcode number.

  • Company

    • CompanySuffix - Get a company suffix. "Inc" and "LLC" etc.

    • CompanyName - Get a company name.

    • CatchPhrase - Get a company catch phrase.

    • Bs - Get a company BS phrase.

  • Database

    • Column - Generates a column name.

    • Type - Generates a column type.

    • Collation - Generates a collation.

    • Engine - Generates a storage engine.

  • Date

    • Past - Get a DateTime in the past between refDate and yearsToGoBack.

    • PastOffset - Get a DateTimeOffset in the past between refDate and yearsToGoBack.

    • Soon - Get a DateTime that will happen soon.

    • SoonOffset - Get a DateTimeOffset that will happen soon.

    • Future - Get a DateTime in the future between refDate and yearsToGoForward.

    • FutureOffset - Get a DateTimeOffset in the future between refDate and yearsToGoForward.

    • Between - Get a random DateTime between start and end.

    • BetweenOffset - Get a random DateTimeOffset between start and end.

    • Recent - Get a random DateTime within the last few days.

    • RecentOffset - Get a random DateTimeOffset within the last few days.

    • Timespan - Get a random TimeSpan.

    • Month - Get a random month

    • Weekday - Get a random weekday

  • Finance

    • Account - Get an account number. Default length is 8 digits.

    • AccountName - Get an account name. Like "savings", "checking", "Home Loan" etc..

    • Amount - Get a random amount. Default 0 - 1000.

    • TransactionType - Get a transaction type: "deposit", "withdrawal", "payment", or "invoice".

    • Currency - Get a random currency.

    • CreditCardNumber - Generate a random credit card number with valid Luhn checksum.

    • CreditCardCvv - Generate a credit card CVV

    • BitcoinAddress - Generates a random Bitcoin address.

    • EthereumAddress - Generate a random Ethereum address.

    • RoutingNumber - Generates an ABA routing number with valid check digit.

    • Bic - Generates Bank Identifier Code (BIC) code.

    • Iban - Generates an International Bank Account Number (IBAN).

  • Hacker

    • Abbreviation - Returns an abbreviation.

    • Adjective - Returns a adjective.

    • Noun - Returns a noun.

    • Verb - Returns a verb.

    • IngVerb - Returns a verb ending with -ing.

    • Phrase - Returns a phrase.

  • Images

    • Abstract - Gets an abstract looking image.

    • Animals - Gets an image of an animal.

    • Business - Gets a business looking image.

    • Cats - Gets a picture of a cat.

    • City - Gets a city looking image.

    • Food - Gets an image of food.

    • Nightlife - Gets an image with city looking nightlife.

    • Fashion - Gets an image in the fashion category.

    • People - Gets an image of humans.

    • Nature - Gets an image of nature.

    • Sports - Gets an image related to sports.

    • Technics - Get a technology related image.

    • Transport - Get a transportation related image.

    • DataUri - Get a SVG data URI image with a specific width and height.

    • PicsumUrl - Get an image from the https://picsum.photos service.

    • PlaceholderUrl - Get an image from https://placeholder.com service.

    • LoremFlickrUrl - Get an image from https://loremflickr.com service.

    • LoremPixelUrl - Creates an image URL with http://lorempixel.com. Note: This service is slow. Consider using PicsumUrl() as a faster alternative.

  • Internet

    • Avatar - Generates a legit Internet URL avatar from twitter accounts.

    • Email - Generates an email address.

    • ExampleEmail - Generates an example email with @example.com.

    • UserName - Generates user names.

    • UserNameUnicode - Generates a user name preserving Unicode characters.

    • DomainName - Generates a random domain name.

    • DomainWord - Generates a domain word used for domain names.

    • DomainSuffix - Generates a domain name suffix like .com, .net, .org

    • Ip - Gets a random IPv4 address string.

    • Port - Generates a random port number.

    • IpAddress - Gets a random IPv4 IPAddress type.

    • IpEndPoint - Gets a random IPv4 IPEndPoint.

    • Ipv6 - Generates a random IPv6 address string.

    • Ipv6Address - Generate a random IPv6 IPAddress type.

    • Ipv6EndPoint - Gets a random IPv6 IPEndPoint.

    • UserAgent - Generates a random user agent.

    • Mac - Gets a random mac address.

    • Password - Generates a random password.

    • Color - Gets a random aesthetically pleasing color near the base RGB. See here.

    • Protocol - Returns a random protocol. HTTP or HTTPS.

    • Url - Generates a random URL.

    • UrlWithPath - Get an absolute URL with random path.

    • UrlRootedPath - Get a rooted URL path like: /foo/bar. Optionally with file extension.

  • Lorem

    • Word - Get a random lorem word.

    • Words - Get an array of random lorem words.

    • Letter - Get a character letter.

    • Sentence - Get a random sentence of specific number of words.

    • Sentences - Get some sentences.

    • Paragraph - Get a paragraph.

    • Paragraphs - Get a specified number of paragraphs.

    • Text - Get random text on a random lorem methods.

    • Lines - Get lines of lorem.

    • Slug - Slugify lorem words.

  • Name

    • FirstName - Get a first name. Getting a gender specific name is only supported on locales that support it.

    • LastName - Get a last name. Getting a gender specific name is only supported on locales that support it.

    • FullName - Get a full name, concatenation of calling FirstName and LastName.

    • Prefix - Gets a random prefix for a name.

    • Suffix - Gets a random suffix for a name.

    • FindName - Gets a full name.

    • JobTitle - Gets a random job title.

    • JobDescriptor - Get a job description.

    • JobArea - Get a job area expertise.

    • JobType - Get a type of job.

  • Phone

    • PhoneNumber - Get a phone number.

    • PhoneNumberFormat - Gets a phone number based on the locale's phone_number.formats[] array index.

  • Rant

    • Review - Generates a random user review.

    • Reviews - Generate an array of random reviews.

  • System

    • FileName - Get a random file name.

    • DirectoryPath - Get a random directory path (Unix).

    • FilePath - Get a random file path (Unix).

    • CommonFileName - Generates a random file name with a common file extension.

    • MimeType - Get a random mime type

    • CommonFileType - Returns a commonly used file type.

    • CommonFileExt - Returns a commonly used file extension.

    • FileType - Returns any file type available as mime-type.

    • FileExt - Gets a random extension for the given mime type.

    • Semver - Get a random semver version string.

    • Version - Get a random Version.

    • Exception - Get a random Exception with a fake stack trace.

    • AndroidId - Get a random GCM registration ID.

    • ApplePushToken - Get a random Apple Push Token

    • BlackBerryPin - Get a random BlackBerry Device PIN

  • Vehicle

    • Vin - Generate a vehicle identification number (VIN).

    • Manufacturer - Get a vehicle manufacture name. IE: Toyota, Ford, Porsche.

    • Model - Get a vehicle model. IE: Camry, Civic, Accord.

    • Type - Get a vehicle type. IE: Minivan, SUV, Sedan.

    • Fuel - Get a vehicle fuel type. IE: Electric, Gasoline, Diesel.

  • Random/Randomizer

    • Number - Get an int from 0 to max.

    • Digits - Get a random sequence of digits.

    • Even - Returns a random even number.

    • Odd - Returns a random odd number.

    • Double - Get a random double, between 0.0 and 1.0.

    • Decimal - Get a random decimal, between 0.0 and 1.0.

    • Float - Get a random float, between 0.0 and 1.0.

    • Byte - Generate a random byte between 0 and 255.

    • Bytes - Get a random sequence of bytes.

    • SByte - Generate a random sbyte between -128 and 127.

    • Int - Generate a random int between MinValue and MaxValue.

    • UInt - Generate a random uint between MinValue and MaxValue.

    • ULong - Generate a random ulong between -128 and 127.

    • Long - Generate a random long between MinValue and MaxValue.

    • Short - Generate a random short between MinValue and MaxValue.

    • UShort - Generate a random ushort between MinValue and MaxValue.

    • Char - Generate a random char between MinValue and MaxValue.

    • Chars - Generate a random chars between MinValue and MaxValue.

    • String - Get a string of characters of a specific length.

    • String2 - Get a string of characters with a specific length drawing characters from chars.

    • Hash - Return a random hex hash. Default 40 characters, aka SHA-1.

    • Bool - Get a random boolean.

    • ArrayElement<T> - Get a random array element.

    • ArrayElement - Get a random array element.

    • ArrayElements<T> - Get a random subset of an array.

    • ListItem<T> - Get a random list item.

    • ListItems<T> - Get a random subset of a List.

    • CollectionItem<T> - Get a random collection item.

    • ReplaceNumbers - Replaces symbols with numbers.

    • ReplaceSymbols - Replaces each character instance in a string.

    • Replace - Replaces symbols with numbers and letters. # = number, ? = letter, * = number or letter.

    • ClampString - Clamps the length of a string between min and max characters.

    • Enum<T> - Picks a random Enum of T. Works only with Enums.

    • Shuffle<T> - Shuffles an IEnumerable source.

    • Word - Returns a single word or phrase in English.

    • Words - Gets some random words and phrases in English.

    • WordsArray - Get a range of words in an array (English).

    • Guid - Get a random GUID.

    • Uuid - Get a random GUID. Alias for Randomizer.Guid().

    • RandomLocale - Returns a random locale.

    • AlphaNumeric - Returns a random set of alpha numeric characters 0-9, a-z.

    • Hexadecimal - Generates a random hexadecimal string.

    • WeightedRandom<T> - Returns a selection of T[] based on a weighted distribution of probability.

是不是挺丰富的，一般场景应该够用了，如果有特殊数据模拟，也只能自已动手了。

对，我是一个祖国的程序员，Member类生成的实例是外国的，这不行，换一下：

            var options = new JsonSerializerOptions();options.Encoder = System.Text.Encodings.Web.JavaScriptEncoder.Create(UnicodeRanges.All);while (true){var personFaker = new Faker<Memmber>("zh_CN").RuleFor(x => x.ID, x => x.Random.Guid()).RuleFor(x=>x.NO,x=>x.Random.Long(100000000000,999999999999)).RuleFor(x => x.Name, x => x.Person.LastName + x.Person.FirstName).RuleFor(x => x.Sex, x => x.Random.Enum<Sex>()).RuleFor(x => x.Email, x => x.Person.Email).RuleFor(x => x.Phone, x => x.Person.Phone).RuleFor(x => x.Age, x => x.Random.Int(0, 120)).RuleFor(x=>x.Balance,x=>x.Finance.Amount(0,1000))                    .RuleFor(x => x.CreateOn, x => x.Date.Past(1));Console.WriteLine(JsonSerializer.Serialize(personFaker.Generate(), options));Console.ReadLine();}

只需要在new Faker<T>时告这个骗子是要骗祖国的程序，就可以了，看结果吧：

{"ID":"219d56ca-ea21-3a02-84b5-d9950ae8f384","NO":362783628351,"Name":"徐思远","Sex":0,"Age":100,"Email":"40@gmail.com","Phone":"024-65735687","Balance":623.22,"CreateOn":"2021-01-19T19:38:30.1504231+09:00"
}

其中的名字还真像个真人名，电话号也换成祖国的了。

那还支持其他国家吗？当然

Locale Code

Language


Locale Code

Language

af_ZA

Afrikaans


fr_CH

French  (Switzerland)

ar

Arabic


ge

Georgian

az

Azerbaijani


hr

Hrvatski

cz

Czech


id_ID

Indonesia

de

German


it

Italian

de_AT

German  (Austria)


ja

Japanese

de_CH

German  (Switzerland)


ko

Korean

el

Greek


lv

Latvian

en

English


nb_NO

Norwegian

en_AU

English  (Australia)


ne

Nepalese

en_AU_ocker

English  (Australia Ocker)


nl

Dutch

en_BORK

English (Bork)


nl_BE

Dutch  (Belgium)

en_CA

English  (Canada)


pl

Polish

en_GB

English (Great  Britain)


pt_BR

Portuguese  (Brazil)

en_IE

English  (Ireland)


pt_PT

Portuguese  (Portugal)

en_IND

English  (India)


ro

Romanian

en_NG

Nigeria  (English)


ru

Russian

en_US

English  (United States)


sk

Slovakian

en_ZA

English (South  Africa)


sv

Swedish

es

Spanish


tr

Turkish

es_MX

Spanish  (Mexico)


uk

Ukrainian

fa

Farsi


vi

Vietnamese

fi

Finnish


zh_CN

Chinese

fr

French


zh_TW

Chinese  (Taiwan)

fr_CA

French  (Canada)


zu_ZA

Zulu (South  Africa)

其实还有Bogus有很多其他功能，大家可以自行探索。

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