Merge pull request #1255 from Comandeer/fix-babili

Babili's sourcemaps causes error in collapseSourcemaps.js

src/utils/collapseSourcemaps.js

@@ -31,6 +31,9 @@ class Link {
 
 			line.forEach( segment => {
 				const source = this.sources[ segment[1] ];
+
+				if ( !source ) return;
+
 				const traced = source.traceSegment( segment[2], segment[3], this.names[ segment[4] ] );
 
 				if ( traced ) {

test/sourcemaps/transform-bundle-babili/_config.js

@@ -0,0 +1,35 @@
+var babiliResults = require( './babili-results' );
+var assert = require( 'assert' );
+var getLocation = require( '../../utils/getLocation' );
+var SourceMapConsumer = require( 'source-map' ).SourceMapConsumer;
+
+module.exports = {
+	description: 'generates valid sourcemap when source could not be determined',
+	options: {
+		plugins: [
+			{
+				transformBundle: function ( code, options ) {
+					var format = options.format;
+
+					return babiliResults[ format ];
+				}
+			}
+		]
+	},
+	test: function ( code, map ) {
+		var smc = new SourceMapConsumer( map );
+
+		var generatedLoc = getLocation( code, code.indexOf( '42' ) );
+		var originalLoc = smc.originalPositionFor( generatedLoc );
+
+		assert.ok( /main/.test( originalLoc.source ) );
+		assert.equal( originalLoc.line, 1 );
+		assert.equal( originalLoc.column, 13 );
+
+		generatedLoc = getLocation( code, code.indexOf( 'log' ) );
+		originalLoc = smc.originalPositionFor( generatedLoc );
+
+		assert.equal( originalLoc.line, 1 );
+		assert.equal( originalLoc.column, 8 );
+	}
+};

test/sourcemaps/transform-bundle-babili/main.js

@@ -0,0 +1 @@
+console.log( 42 );