Add equal, unequal and approximate equal to unit test framework.

Signed-off-by: CyberZHG <CyberZHG@gmail.com>
The forecolor control in Linux at unit test framework.

Signed-off-by: CyberZHG <CyberZHG@gmail.com>
Add time display for unit test framework.

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