Improvement to Hybrid\Chart\Fluent test case.
Fixed Hybrid\Chart\Fluent test case, and small refactor.

Signed-off-by: crynobone <crynobone@gmail.com>
Add Hybrid\Expression unit test.

Signed-off-by: crynobone <crynobone@gmail.com>
Multiple improvement to unit test.

Signed-off-by: crynobone <crynobone@gmail.com>
__toString here return an array, which is invalid.

Signed-off-by: crynobone <crynobone@gmail.com>
Update Hybrid\Memory unit test.

Signed-off-by: crynobone <crynobone@gmail.com>