intermock

Mocking library to create mock objects and JSON for TypeScript interfaces via Faker.

This is not an officially supported Google product.

Installation

git clone [email protected]:google/intermock.git
npm install
npm run build

CLI

Intermock exposes a CLI, which is the recommended way to use the tool. The following subsections show an example file, command, and output to demonstrate using the CLI.

Example file

interface Admin extends User {
   adminRecord: AdminRecord;
}

interface Student extends User {
   schoolRecord: SchoolRecord;
}

interface User {
   firstName: string;
   lastName: string;
   username: string;
   emailAddress: string;
}

interface AdminRecord {
   studentsPassedEachYear: number[];
}

interface SchoolRecord {
   startDate: string;
   endDate: string;
   isActive: boolean;
   grades: number[];
}

Example command

node build/src/cli/index.js --files ./example-file.ts --interfaces "Admin"

Example output

{
  "Admin": {
    "firstName": "Willa",
    "lastName": "Walker",
    "username": "Shyann_Mante",
    "emailAddress": "[email protected]",
    "adminRecord": {
      "studentsPassedEachYear": [
        80342,
        23404,
        12854,
        74937,
        38185,
        73316
      ]
    }
  },

API Usage

Intermock’s API exports only one function, as seen below:

Function

// Returns an object or string based on `output` property specified in `Options`
mock(options: Options): object|string

Options

export interface Options {
 // Array of file tuples. (filename, data)
 files?: Array<[string, string]>;

 // TypeScript is currently the only supported language
 language?: SupportedLanguage;

 // Specific interfaces to write to output
 interfaces?: string[];

 // Used for testing mode,
 isFixedMode?: boolean;

 // One of object|json|string. Strings have their object's functions
 // stringified.
 output?: OutputType;

 // Should optional properties always be enabled
 isOptionalAlwaysEnabled?: boolean;
}

Type Support

The following TypeScript static type features are supported:

• Interfaces
• Interfaces with properties of primitive types
• Interfaces with property references to other complex types
• Interfaces with extensions
• Type aliases
• Arrays
• Namespaces
• Functions (stringified output!)
• Optional properties
• Specific fake data types (via JSDoc comment)

Building

npm run build

Development

If you want to run the build script and tests after you save a file while developing, run the following command: npm run test-watch

Docs

Developing Docs

To develop documentation run the following commands:

npm run build
npm run docs-serve

Edit the files in docs/ and Webpack's Dev Server should auto-reload when there are changes

Statically Building Docs

To build the docs statically run the following command:

npm run build
npm run docs-build

Contributing

See CONTRIBUTING.md in this repo

License

See LICENSE in this repo