To import namespace from other files as an external module while maintaining it

Environment
- Node.js:8.9.4
- typescript:2.9.2
What do you want to do
- I want to test classes in the namespace with jest or mocha
- tsconfig.json target is ES5
- I don't want to change the source side

Current State Example

//src/main.ts
namespace base {
    export class Foo {
        constructor() { console.log("Called Foo Constructor!");}
        public answerToTheUltimateQuestion(): number {return42;}
        public callHello() {return new Bar().say()}
    }
}

// src/Hello.ts
namespace base {
    export class Bar {
        constructor() { console.log("Called Bar Constructor!";};
        say():string {return "hello!";}
        getFoo() {return new base.Foo();}
    }
}

// \__tests__/main.test.ts
const foo = new base.Foo(); // ReferenceError: base is not defined

test("someMethod",()=>{
    expect(foo.answerToTheUltimateQuestion()) .toBe(42);
});

Environment

Node.js:8.9.4
typescript:2.9.2

What you want to do

I want to test classes in the namespace with jest or mocha
tsconfig.json target is ES5
I don't want to change the source side

Current State Example

//src/main.ts
namespace base {
    export class Foo {
        constructor() { console.log("Called Foo Constructor!");}
        public answerToTheUltimateQuestion(): number {return42;}
        public callHello() {return new Bar().say()}
    }
}

// src/Hello.ts
namespace base {
    export class Bar {
        constructor() { console.log("Called Bar Constructor!";};
        say():string {return "hello!";}
        getFoo() {return new base.Foo();}
    }
}

// \__tests__/main.test.ts
const foo = new base.Foo(); // ReferenceError: base is not defined

test("someMethod",()=>{
    expect(foo.answerToTheUltimateQuestion()) .toBe(42);
});

I know it's best to rewrite it in a modular format, but it has a large number of files and
It's hard to change, so I'll do my best to test it. I want to re-write it after securing a situation where I can understand even if it is broken.
Is it possible to change the d.ts file, change the target of tconfig.json, or resolve it by any other means?

node.js typescript

2022-09-30 17:26

1 Answers

There was a similar question in our stackoverflow.However, our questions have not been solved.

How would I test typecode that uses names in Node.js?

However, there was an introduction to using the TypeScript --outFile option.

//<reference/> with the dependent file path in the test code as follows:
outFile option with main.test.js and so on.
A single test code and dependency code can be combined to correct the test code and
You may be able to do this with just the ingenuity of the build tool.

//\_tests__/main.test.ts
/// <reference path="main.ts"/>
/// <reference path="Hello.ts"/>
const foo = new base.Foo(); // ReferenceError: base is not defined

test("someMethod",()=>{
    expect(foo.answerToTheUltimateQuestion()) .toBe(42);
});

2022-09-30 17:26

If you have any answers or tips

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