Refactor Button component test file to new format

[SriHV]

What is the context of this PR?

139

Refactored the button macro.spec file as per the new format.

How to review this PR

Ask yourself....

• Do we need any additional tests?
• Are the tests descriptions clear?
• Does the order of the test document make sense?
• Is it internally consistent?
• Is it consistent with the guidelines for test refactoring?

run this test command to view the test results:
yarn test --testNamePattern="FOR: button"

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[rmccar]

These are mainly just minor things but it would be good to be consistent with the way we are writing these tests. We need to make sure we use the correct names for params and the tests describe what they are testing

[rmccar]

There are now a couple of new tests being added in #3418 that will need to be incorporated into this

[rmccar]

Ive realised we are missing tests for the following params, I think we need to add them:

• name
• value
• iconType
• listeners

One more minor comment