Merge pull request #410 from lijunle/ts-once

Avoid transpile the TypeScript code twice.

closes #406, closes #407

Author: kulshekhar

.editorconfig

@@ -1,7 +1,7 @@
 [*.ts]
 indent_style = space
-indent_size = 4
+indent_size = 2
 
 [*.tsx]
 indent_style = space
-indent_size = 4
+indent_size = 2

AUTHORS

@@ -27,6 +27,7 @@ Ihor Chulinda <ichulinda@gmail.com>
 J Cheyo Jimenez <cheyo@masters3d.com>
 Jim Cummins <jimthedev@gmail.com>
 Joscha Feth <joscha@feth.com>
+Junle Li <lijunle@gmail.com>
 Justin Bay <jwbay@users.noreply.github.com>
 Kulshekhar Kabra <kulshekhar@users.noreply.github.com>
 Kyle Roach <kroach.work@gmail.com>

src/default-retrieve-file-handler.ts

@@ -1,10 +1,9 @@
 import * as sourceMapSupport from 'source-map-support';
-import { defaultRetrieveFileHandler } from './default-retrieve-file-handler';
 
-export function install() {
+export function install(filePath: string, fileContent: string) {
   const options: sourceMapSupport.Options = {};
 
-  options.retrieveFile = defaultRetrieveFileHandler;
+  options.retrieveFile = path => (path === filePath ? fileContent : undefined);
 
   /* tslint:disable */
   // disabling tslint because the types for the source-map-support version

src/install.ts

@@ -58,17 +58,11 @@ export function process(
     transformOptions,
   );
 
-  const modified = injectSourcemapHook(outputText);
-
-  if (tsJestConfig.enableInternalCache === true) {
-    // This config is undocumented.
-    // This has been made configurable for now to ensure that
-    // if this breaks something for existing users, there's a quick fix
-    // in place.
-    // If this doesn't cause a problem, this if block will be removed
-    // in a future version
-    cacheFile(jestConfig, filePath, modified);
-  }
+  const modified = injectSourcemapHook(
+    filePath,
+    tsTranspiled.outputText,
+    outputText,
+  );
 
   return modified;
 }

src/preprocessor.ts

@@ -189,10 +189,16 @@ export function cacheFile(
   }
 }
 
-export function injectSourcemapHook(src: string): string {
+export function injectSourcemapHook(
+  filePath: string,
+  typeScriptCode: string,
+  src: string,
+): string {
   const start = src.length > 12 ? src.substr(1, 10) : '';
 
-  const sourceMapHook = `require('ts-jest').install()`;
+  const filePathParam = JSON.stringify(filePath);
+  const codeParam = JSON.stringify(typeScriptCode);
+  const sourceMapHook = `require('ts-jest').install(${filePathParam}, ${codeParam})`;
 
   return start === 'use strict'
     ? `'use strict';${sourceMapHook};${src}`