Interface IObjectFormatter

A custom formatter should implement this interface and be registered with EqualMatchingInjectorConfig.

Returns

undefined if the formatter is not intended to format the object of such type, otherwise returns a string.

// A custom matcher that matches Moment and Date objects
import { EqualMatchingInjectorConfig, IObjectMatcher, Mock, OBJECT_MATCHERS } from "moq.ts";
import { isMoment, utc } from "moment";

class MomentDateMatcher implements IObjectMatcher {
    matched<T extends object>(left: T, right: T): boolean | undefined {
        if (left instanceof Date && isMoment(right)) {
            return left.valueOf() === right.valueOf();
        }
        return undefined;
    }
}

const moment = utc(1);
const injectorConfig = new EqualMatchingInjectorConfig([{
    provide: OBJECT_MATCHERS,
    useClass: MomentDateMatcher,
    multi: true,
    deps: []
}]);

const mock = new Mock<(args: any) => number>({injectorConfig})
.setup(instance => instance(moment))
.returns(2);

const object = mock.object();

const actual = object(new Date(1));

expect(actual).toBe(2);
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