Files.write and Files.readAllBytes changes byte[] input

Question

I am writing a unit test and I am seeing the following which I don't understand. Any help is appreciated.

tempFile = File.createTempFile("temp", "file");
Files.write(tempFile.toPath(), expectedBytes);
byte[] b = Files.readAllBytes(tempFile.toPath());
Assert.equals(b, expectedBytes); // failed

a byte array is only equal to itself. Not to any other byte array, even if the other array has the same bytes. The same goes for all arrays, by the way. — JB Nizet, Jun 29 '18 at 16:34
Try Assert.assertArrayEquals() instead (assuming JUnit here). — t6nn, Jun 29 '18 at 16:37

score 2 · Answer 1 · answered Jun 29 '18 at 16:36

2

Arrays do not support deep comparison with equals. Check if that Assert class has an arrayEquals method.

answered Jun 29 '18 at 16:36

Leo Aso

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that works, thank you very much! – Isa Jun 29 '18 at 16:38

Files.write and Files.readAllBytes changes byte[] input

1 Answers1