Add test for #3467

test/cli/samples/config-multiple-getfilename/_config.js

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+module.exports = {
+	skip: true,
+	description: 'returns correct file names for multiple outputs (#3467)',
+	command: 'rollup -c'
+};

test/cli/samples/config-multiple-getfilename/_expected/cjs-main.js

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+'use strict';
+
+var main = 42;
+
+module.exports = main;

test/cli/samples/config-multiple-getfilename/_expected/cjs.txt

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+cjs-main.js

test/cli/samples/config-multiple-getfilename/_expected/es-main.js

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+var main = 42;
+
+export default main;

test/cli/samples/config-multiple-getfilename/_expected/es.txt

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+es-main.js

test/cli/samples/config-multiple-getfilename/main.js

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+export default 42;

test/cli/samples/config-multiple-getfilename/rollup.config.js

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+let fileReference;
+
+export default {
+	input: 'main.js',
+	plugins: {
+		name: 'test',
+		buildStart() {
+			fileReference = this.emitFile({ type: 'chunk', id: 'main.js' });
+		},
+		generateBundle(options) {
+			this.emitFile({
+				type: 'asset',
+				fileName: `${options.format}.txt`,
+				source: this.getFileName(fileReference),
+			});
+		},
+	},
+	output: [
+		{
+			format: 'es',
+			dir: '_actual',
+			entryFileNames: 'es-[name].js',
+		},
+		{
+			format: 'cjs',
+			dir: '_actual',
+			entryFileNames: 'cjs-[name].js',
+		},
+	],
+};