fix: 🐛 refactor copyFile tests to be compatible w/ strictNullChecks

streamich · Jul 12, 2019 · e318af2 · e318af2
1 parent d06201e
commit e318af2
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/__tests__/volume/copyFile.test.ts b/src/__tests__/volume/copyFile.test.ts
@@ -36,7 +36,7 @@ describe('copyFile(src, dest[, flags], callback)', () => {
 
     vol.copyFile('/foo', '/bar', constants.COPYFILE_EXCL, (err, result) => {
       expect(err).toBeInstanceOf(Error);
-      expect(err.message).toContain('EEXIST');
+      expect(err).toHaveProperty('message', expect.stringContaining('EEXIST'));
       expect(result).toBe(undefined);
 
       expect(vol.readFileSync('/foo', 'utf8')).toBe('hello world');