Adding tests for JsonObject with repeated properties names

[awvalenti]

Since allowing properties with repeated names is a deliberate feature, I've added a couple of tests to document that.

[bernardosulzbach]

It seems good.

[bernardosulzbach]

@awvalenti Shouldn't we also have a case for same name, same value? On the current implementation it is quite obvious that it will work just as the first case you added. But I think there is some documentation value for it. We don't only allow for repeated names, we allow even for repeated pairs.

I don't think it is entirely necessary, so feel free to judge if this case gets in or not.

[awvalenti]

Done! Please take another look at it.

[bernardosulzbach]

Seems good.

But I was actually talking about

  @Test
  public void keyRepetition_allowsMultipleEntries() {
    object.add("a", "a");
    object.add("a", "a");

    assertEquals(2, object.size());
  }

when I wrote "Shouldn't we also have a case for same name, same value?".

[awvalenti]

Oh, ok. I'm not sure if that's necessary, but it's up to you.

[bernardosulzbach]

No. It's OK as it is.

[ralfstx]

Looks good, thank you!