Typescript cannot find interface from a different directory

Question

I do have 2 main folders in my project:

src/*.ts
test/*.test.ts

In the src folder there is a interface named IImportRow.ts

interface IImportRow {
    transactionId?: string;
    transactionApiId?: string;
    ...
}

this interface can be found for every other ts file in the src folder.

However in the test folder the TS cannot find the interface

var row: IImportRow = {
    transactionId: '10',
    ...
};

[ts] Cannot find name 'IImportRow'.

Is this an expected behaviour? What should I do in order to fix it?

here are my tsconfig.json configuration

"compilerOptions": {
    "target": "es2018",
    "module": "commonjs",
    "sourceMap": true,
    "outDir": "dist",
    "strict": false,
    "noImplicitAny": false,
    "strictPropertyInitialization": false,
    "esModuleInterop": true,
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true
},

Jesse Carter · Accepted Answer · 2018-09-05 14:10:24Z

2

There's an additional portion of the TsConfig file which lets you specifies which directories should be included/excluded for inspection by the TS compiler. You just need to add your tests folder to the include array. Here's an example from one of my projects that you can tweak as needed.

{
    "compilerOptions": {
        "module": "commonjs",
        "declaration": false,
        "noImplicitAny": false,
        "removeComments": true,
        "noLib": false,
        "allowSyntheticDefaultImports": true,
        "emitDecoratorMetadata": true,
        "experimentalDecorators": true,
        "target": "es6",
        "sourceMap": true,
        "allowJs": true,
        "outDir": "./build",
        "baseUrl": "./src",
        "skipLibCheck": true
    },
    "include": ["src/**/*"],
    "exclude": ["node_modules", "build", "**/*.spec.ts"]
}

answered Sep 5, 2018 at 14:10

Jesse Carter

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2 Comments

Daniel Santos Over a year ago

you men to add the "src" folder instead of "test" right?

Jesse Carter Over a year ago

I believe you would need to add both in your situation

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