Typescript requirement to pass all variables-CodePudding

i Work with ts-jest and i trie to mock one service function but i only need pass one variable values of many others. like the exemple below:

getDataInformationMocked.mockReturnValueOnce({
      scopes: ['local','cloud']
    });

this code works, but ts show a error saing it is more variables that are not being passed.

error message: The type '{ scopes: string[]; }' does not have the following properties of type 'dataNames': iss, exp, nbf, aud and 20 more.

so, is there any way to pass all variables from an interface, without having to create an object with all values?

CodePudding user response：

This builds off the playground provided by Charles Fries and both solutions resolve the error.

You can use either Partial which Constructs a type with all properties of Type set to optional. This utility will return a type that represents all subsets of a given type.:

interface DataNames {
    scopes: string[];
    iss: string;
    exp: string;
    nbf: string;
    aud: string;
}

const getDataInformationMocked = {
    mockReturnValueOnce: (_dataNames: Partial<DataNames>): void => {}
};

getDataInformationMocked.mockReturnValueOnce({
    scopes: ['local','cloud']
});

Or Pick which Constructs a type by picking the set of properties Keys (string literal or union of string literals) from Type.:

interface DataNames {
    scopes: string[];
    iss: string;
    exp: string;
    nbf: string;
    aud: string;
}

const getDataInformationMocked = {
    mockReturnValueOnce: (_dataNames: Pick<DataNames, 'scopes'>): void => {}
};

getDataInformationMocked.mockReturnValueOnce({
    scopes: ['local','cloud']
});

CodePudding user response：

Use a type assertion:

getDataInformationMocked.mockReturnValueOnce({
  scopes: ['local','cloud']
} as dataNames);