@@ -489,6 +489,45 @@ describe('bundle', () => {
489489 } )
490490 } )
491491
492+ it ( 'should use a source\'s own separator' , ( ) => {
493+ const b = new Bundle ( { separator : '\n' } )
494+
495+ b . addSource ( { filename : 'a.js' , content : new MagicString ( 'AAA' ) } )
496+ b . addSource ( {
497+ filename : 'b.js' ,
498+ content : new MagicString ( 'BBB' ) ,
499+ separator : '\n\n\n' ,
500+ } )
501+
502+ assert . equal ( b . toString ( ) , 'AAA\n\n\nBBB' )
503+
504+ const map = b . generateMap ( { file : 'out.js' , includeContent : true } )
505+ const smc = new SourceMapConsumer ( map as unknown as RawSourceMap )
506+ const loc = smc . originalPositionFor ( { line : 4 , column : 0 } )
507+
508+ assert . equal ( loc . source , 'b.js' )
509+ assert . equal ( loc . line , 1 )
510+ assert . equal ( loc . column , 0 )
511+ } )
512+
513+ it ( 'should stay aligned after append' , ( ) => {
514+ const b = new Bundle ( )
515+
516+ b . addSource ( { filename : 'a.js' , content : new MagicString ( 'AAA' ) } )
517+ b . append ( 'XXX' )
518+ b . addSource ( { filename : 'b.js' , content : new MagicString ( 'BBB' ) } )
519+
520+ assert . equal ( b . toString ( ) , 'AAAXXX\nBBB' )
521+
522+ const map = b . generateMap ( { file : 'out.js' , includeContent : true } )
523+ const smc = new SourceMapConsumer ( map as unknown as RawSourceMap )
524+ const loc = smc . originalPositionFor ( { line : 2 , column : 0 } )
525+
526+ assert . equal ( loc . source , 'b.js' )
527+ assert . equal ( loc . line , 1 )
528+ assert . equal ( loc . column , 0 )
529+ } )
530+
492531 // TODO tidy this up. is a recreation of a bug in Svelte
493532 it ( 'generates a correct sourcemap for a Svelte component' , ( ) => {
494533 const b = new Bundle ( {
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