Sanitize stderr before checking output

test/cli/samples/custom-frame-with-pos/_config.js

@@ -1,10 +1,15 @@
-const assert = require('assert');
+const { assertStderrIncludes } = require('../../../utils.js');
 
 module.exports = {
 	description: 'custom (plugin generated) code frame taking priority over pos generated one',
 	command: 'rollup -c',
 	error: () => true,
-	stderr: stderr => {
-		assert.ok(/custom code frame/.test(stderr));
-	}
+	stderr: stderr =>
+		assertStderrIncludes(
+			stderr,
+			'[!] (plugin at position 1) Error: My error.\n' +
+				'main.js (1:5)\n' +
+				'custom code frame\n' +
+				'Error: My error.'
+		)
 };

test/cli/samples/custom-frame/_config.js

@@ -1,10 +1,16 @@
-const assert = require('assert');
+const { assertStderrIncludes } = require('../../../utils.js');
 
 module.exports = {
-	description: 'errors with custom (plugin generated) code frame',
+	description: 'errors with plugin generated code frames also contain stack',
 	command: 'rollup -c',
 	error: () => true,
 	stderr: stderr => {
-		assert.ok(/custom code frame/.test(stderr));
+		assertStderrIncludes(
+			stderr,
+			'[!] (plugin at position 1) Error: My error.\n' +
+				'main.js\ncustom code frame\nError: My error.\n' +
+				'    at Object.transform'
+		);
+		assertStderrIncludes(stderr, 'rollup.config.js:11:17');
 	}
 };

test/cli/samples/empty-chunk-multiple/_config.js

@@ -1,10 +1,8 @@
-const assert = require('assert');
+const { assertStderrIncludes } = require('../../../utils.js');
 
 module.exports = {
 	description: 'shows warning when multiple chunks empty',
 	command: 'rollup -c',
 	error: () => true,
-	stderr: stderr => {
-		assert.ok(stderr.includes('(!) Generated empty chunks\na, b'));
-	}
+	stderr: stderr => assertStderrIncludes(stderr, '(!) Generated empty chunks\na, b')
 };

test/cli/samples/empty-chunk/_config.js

@@ -1,10 +1,8 @@
-const assert = require('assert');
+const { assertStderrIncludes } = require('../../../utils.js');
 
 module.exports = {
 	description: 'shows warning when chunk empty',
 	command: 'rollup -c',
 	error: () => true,
-	stderr: stderr => {
-		assert.ok(stderr.includes('(!) Generated an empty chunk\nmain'));
-	}
+	stderr: stderr => assertStderrIncludes(stderr, '(!) Generated an empty chunk\nmain')
 };

test/utils.js

@@ -12,6 +12,7 @@ exports.loader = loader;
 exports.normaliseOutput = normaliseOutput;
 exports.runTestSuiteWithSamples = runTestSuiteWithSamples;
 exports.assertDirectoriesAreEqual = assertDirectoriesAreEqual;
+exports.assertStderrIncludes = assertStderrIncludes;
 
 function normaliseError(error) {
 	delete error.stack;
@@ -224,3 +225,12 @@ function assertFilesAreEqual(actualFiles, expectedFiles, dirs = []) {
 		);
 	});
 }
+
+function assertStderrIncludes(stderr, expected) {
+	// eslint-disable-next-line no-control-regex
+	const output = stderr.replace(/\x1b\[[^m]*m/g, '');
+	assert.ok(
+		output.includes(expected),
+		`Could not find ${JSON.stringify(expected)} in ${JSON.stringify(output)}`
+	);
+}