typescript-remove-exports

Why

Useful if you have a typescript file that you want to test that is not a module.

How

Add export keyword to the functions that you want to test.
e.g fileWithExport.ts
``typescript
export function testThis(){}
`

Transform the typescript with the exports to remove them.
1) npm install --save-dev typescript-remove-exports

2 option 1) Use with gulp-typescript.
`typescript
import * as ts from 'gulp-typescript'
import { getCustomTransformers } from 'typescript-remove-exports'

export function gulpCompileWithTransform(){
const yourTsConfigPath = 'path to your tsconfig...';
const yourDest='your destination...';

const project=ts.createProject(yourTsConfigPath,{
getCustomTransformers:getCustomTransformers
});

return project.src().pipe(project()).pipe(dest(yourDest));

}
`
or
2 option 2) Use typescript api
`typescript
import * as ts from "typescript"
import { removeExportTransformerFactory, remove__esModuleFactory } from 'typescript-remove-exports'

const yourCompilerOptions:ts.CompilerOptions={
module:ts.ModuleKind.None,
target:ts.ScriptTarget.ES3,
strict:true,
removeComments:true
}
function getSourceText(){
//get the typescript as a string
}
function transpileRemoving__esModule(){

const output= ts.transpileModule(getSourceText(),{
compilerOptions:yourCompilerOptions,
transformers:{
before:[
removeExportTransformerFactory,
],
after:[remove__esModuleFactory]
}
}).outputText;

//do something with it
return output;
}
``

Requires typescript ^2.2.0