function testConversion(assert, sXmlSnippet, oExpected, bSubset) {
		testConversionForInclude(assert, '<edmx:DataServices m:DataServiceVersion="2.0">'
			+ sXmlSnippet + "</edmx:DataServices>", oExpected, bSubset);
	}
Tests the conversion of the given XML snippet.
@param {object} assert
  QUnit's assert
@param {string} sXmlSnippet
  the XML snippet; it will be inserted below an <Edmx> element
@param {object} oExpected
  the expected JSON object
@param {boolean} [bSubset]
  whether the given JSON is just a subset of the real expectation, i.e. every top-level
  property that is given must exist with the exact value (deepEqual), but there may be others