Add Illuminate\Support\Fluent test cases

Signed-off-by: crynobone <crynobone@gmail.com>
Avoid Warning: The use statement with non-compound name 'ReflectionObject' has no effect

Signed-off-by: crynobone <crynobone@gmail.com>
Merge pull request #870 from crynobone/feature/test-fluent

Add Illuminate\Support\Fluent test cases