Add Test-Suite & tests for test-framework components #43
Description
test-framework itself (core) has some tests, but doesn't declare the tests as a Test-Suite in the test-framework.cabal file.
This issue is concerned with widening test coverage of the codebase.
Tests would make it much easier for contributors-to-be to contribute, as it enables TDD and we can prevent regressions from happening when changes are made.
The test-suite can be made to depend on previous versions (e.g. v0.7) of test-framework itself for convenience of running tests.