fix: pass filename and inputMap to Babel (#138)

.eslintrc

@@ -4,6 +4,6 @@
     "vue"
   ],
   "extends": [
-    "plugin:vue-libs/recommended",
+    "plugin:vue-libs/recommended"
   ]
 }

lib/compilers/babel-compiler.js

@@ -18,10 +18,13 @@ module.exports = function compileBabel (scriptContent, inputSourceMap, inlineCon
 
   const babelOptions = Object.assign(sourceMapOptions, babelConfig)
 
+  // babel throws error if filename is undefined, "unknown" is default
+  if (!babelOptions.filename) babelOptions.filename = 'unknown'
   const res = babel.transform(scriptContent, babelOptions)
 
   return {
     code: res.code,
     sourceMap: res.map
   }
 }
+

lib/compilers/coffee-compiler.js

@@ -6,17 +6,23 @@ module.exports = function (raw, vueJestConfig, filePath) {
   ensureRequire('coffee', ['coffeescript'])
   var coffee = require('coffeescript')
   var compiled
+  var babelConfig = loadBabelConfig(vueJestConfig, filePath)
+
+  // babel throws error if filename is undefined, "unknown" is default
+  if (!babelConfig.filename) babelConfig.filename = 'unknown'
+
   try {
     compiled = coffee.compile(raw, {
       bare: true,
       sourceMap: true,
-      transpile: loadBabelConfig(vueJestConfig, filePath)
+      transpile: babelConfig
     })
+
+    return {
+      code: compiled.js,
+      map: compiled.v3SourceMap
+    }
   } catch (err) {
     throwError(err)
   }
-  return {
-    code: compiled.js,
-    map: compiled.v3SourceMap
-  }
 }

lib/compilers/typescript-compiler.js

@@ -11,7 +11,7 @@ module.exports = function compileTypescript (scriptContent, vueJestConfig, fileP
   const res = typescript.transpileModule(scriptContent, tsConfig)
   const inputSourceMap = (res.sourceMapText !== undefined)
     ? JSON.parse(res.sourceMapText)
-    : ''
+    : false // inputSourceMap must be a boolean, object, or undefined as per babel requirements
 
   // handle ES modules in TS source code in case user uses non commonjs module
   // output and there is no .babelrc.
@@ -26,3 +26,4 @@ module.exports = function compileTypescript (scriptContent, vueJestConfig, fileP
 
   return compileBabel(res.outputText, inputSourceMap, inlineBabelConfig, vueJestConfig)
 }
+

test/.eslintrc

@@ -1,5 +1,5 @@
 {
-  "extends": '../.eslintrc',
+  "extends": "../.eslintrc",
   "env": {
     "jest": true
   }