How to use

SpanMutator

in

com.nike.wingtips

@Override
public void doChangeSpanName(@NotNull Span span, @NotNull String newName) {
  SpanMutator.changeSpanName(span, newName);
}

@Override
protected void doChangeSpanName(@NotNull Span span, @NotNull String newName) {
  SpanMutator.changeSpanName(span, newName);
}

@Override
protected void doChangeSpanName(@NotNull Span span, @NotNull String newName) {
  SpanMutator.changeSpanName(span, newName);
}

@Override
public void doChangeSpanName(@NotNull Span span, @NotNull String newName) {
  SpanMutator.changeSpanName(span, newName);
}

@Override
public void doChangeSpanName(@NotNull Span span, @NotNull String newName) {
  SpanMutator.changeSpanName(span, newName);
}

SpanMutator.changeSpanName(span, finalSpanName);

  @Test
  public void changeSpanName_does_nothing_if_passed_null_newName() {
    // given
    Span spanMock = mock(Span.class);

    // when
    SpanMutator.changeSpanName(spanMock, null);

    // then
    verifyZeroInteractions(spanMock);
  }
}

@Test
public void changeSpanName_does_nothing_if_passed_null_span() {
  // expect - no exception thrown when passed null span.
  SpanMutator.changeSpanName(null, "foo");
}

@Test
public void changeSpanName_works_as_expected() {
  // given
  Span span = Span.newBuilder("origSpanName", Span.SpanPurpose.SERVER).build();
  String newSpanName = UUID.randomUUID().toString();
  assertThat(span.getSpanName()).isNotEqualTo(newSpanName);
  // when
  SpanMutator.changeSpanName(span, newSpanName);
  // then
  assertThat(span.getSpanName()).isEqualTo(newSpanName);
}