Improve XML assertions

[peter279k]

Introduction

We have to consider about improving XML assertions.

The official PHPUnit provides the following related XML assertions:

• assertXmlFileEqualsXmlFile
• assertXmlStringEqualsXmlFile
• assertXmlStringEqualsXmlString

I think we can implement following XML assertions:

• assertIsXmlString and assertIsXmlFile
• assertXmlStringContainsTag
• assertXmlStringContainsTagWithAttribute
• assertXmlStringContainsDeclaration
• assertXmlStringDeclaration

The missed XML assertions have been implemented because we can assert XML string/file easily/conveniently.

@adhocore, do you have any thought about this?

Any related XML assertions I think are feel free to add and mention on this issue.

• Bug/Issue
• Feature request
• General stuff

[adhocore]

perfect, if they are not already in phpunit library we can implement it 😎