The dynamic test suite is a framework to test dynamic properties of FIDL bindings, such as how they respond to incorrect ordinals, an unexpected channel closure, and other protocol level semantic aspects.
You can read about how the architecture of the framework in the fidl.dynsuite library.
The various test cases which leverage the framework are in harness/main.cc.
To run client tests for the Go bindings
fx set core.x64 --with //bundles/fidl:tests
Then
fx test --test-filter='ClientTest.*' fidl-dyn-suite-go-test fx test --test-filter='ClientTest.*' fidl-dyn-suite-hlcpp-test