From f96a35d7d6987ad6bcf11e61e7d5206c24463432 Mon Sep 17 00:00:00 2001
From: cexbrayat <cedric@ninja-squad.com>
Date: Fri, 25 May 2018 11:21:12 +0200
Subject: [PATCH] Fix: handle no `file` attribute on `rawSourceMap`

Fixes #168
---
 src/CoverageTransformer.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/CoverageTransformer.js b/src/CoverageTransformer.js
index 927279f..2aa2c5e 100644
--- a/src/CoverageTransformer.js
+++ b/src/CoverageTransformer.js
@@ -140,7 +140,7 @@ export default class CoverageTransformer {
 			origSourceFilename = rawSourceMap.sources[0];
 
 			if (origSourceFilename && path.extname(origSourceFilename) !== '' && rawSourceMap.sources.length === 1) {
-				origFileName = rawSourceMap.file;
+				origFileName = rawSourceMap.file || rawSourceMap.sources[0];
 				fileName = filePath.replace(path.extname(origFileName), path.extname(origSourceFilename));
 				rawSourceMap.file = fileName;
 				rawSourceMap.sources = [fileName];