AssertEquals(String, String) ComparisonFailure when contents are identical

Question

I\'m facing the following scenario:

I have an app that spits everything out to the STDOUT (simple company test) and I\'m trying to JUnit this.

My problem is,

Answer 1

The visible characters are identical, but the non-printable characters are not.

You are comparing expected output containing CRLF (\r\n) to actual output with just LF (\n). You can see that in IntelliJ above the right-hand side of both text areas.

Simple solution is to replace the \n's in your string with \r\n. Or remove \r from the other.

---

It is also worth noting that the parameter ordering is actually (Object expected, Object actual), so the outContent should go second since that is the "actual" output.

Answer 2

You can use AssertJ "isEqualToNormalizingNewline" as in:

import static org.assertj.core.api.Assertions.assertThat;

...

@Test
public void ingoreLineEndingCharacterTest() {
    assertThat("First Line\nSecond Line\n").isEqualToNormalizingNewlines("First Line\r\nSecond Line\r\n");
}