grest-ts

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@grest-ts/testkit-runtime ​

Thin runtime component of @grest-ts/testkit. Provides the @mockable and @testable decorators that you add to your service classes. This package is included in production builds but has zero effect at runtime — decorators only activate when a test context is present.

You typically don't interact with this package directly beyond applying the decorators.

@mockable ​

Marks a class so its async methods can be mocked or spied on during tests.

typescript
import {mockable} from "@grest-ts/testkit-runtime";

@mockable
export class WeatherService {
    async getWeather(city: string): Promise<WeatherData> {
        // real implementation
    }
}

In production, calls pass through unchanged. During tests, @grest-ts/testkit can intercept calls via mockOf() and spyOn().

@testable ​

Marks a class so tests can invoke its methods directly via callOn(), without going through the full API layer.

typescript
import {mockable, testable} from "@grest-ts/testkit-runtime";

@testable
@mockable
export class WeatherService {
    async getWeather(city: string): Promise<WeatherData> { /* ... */ }
}

Instances are automatically registered in the service locator on construction, making them accessible to the test runner.