Fix validation of MS-05 NcFloat32 values. (#400)

* Fix checking of NcFloat32 values. Added regression test

---------

Co-authored-by: Simon Lo <simon.lo@sony.com>

Author: jonathan-r-thorpe

Development/nmos/control_protocol_utils.cpp

@@ -185,7 +185,7 @@ namespace nmos
                         };
                         auto is_float32 = [](double value)
                         {
-                            return value >= (std::numeric_limits<float_t>::min)()
+                            return value >= (std::numeric_limits<float_t>::lowest)()
                                 && value <= (std::numeric_limits<float_t>::max)();
                         };
 

Development/nmos/test/control_protocol_test.cpp

@@ -883,10 +883,12 @@ BST_TEST_CASE(testConstraints)
     BST_REQUIRE_NO_THROW(nmos::details::constraints_validation(std::numeric_limits<uint64_t>::max(), value::null(), value::null(), no_constraints_uint64_constraints_validation_params));
     // float32 datatype constraints validation
     const nmos::details::datatype_constraints_validation_parameters no_constraints_float32_constraints_validation_params{ no_constraints_float32_datatype, nmos::make_get_control_protocol_datatype_descriptor_handler(control_protocol_state) };
-    BST_REQUIRE_THROW(nmos::details::constraints_validation(std::numeric_limits<double>::min(), value::null(), value::null(), no_constraints_float32_constraints_validation_params), nmos::control_protocol_exception);
+    BST_REQUIRE_THROW(nmos::details::constraints_validation(std::numeric_limits<double>::lowest(), value::null(), value::null(), no_constraints_float32_constraints_validation_params), nmos::control_protocol_exception);
     BST_REQUIRE_THROW(nmos::details::constraints_validation(std::numeric_limits<double>::max(), value::null(), value::null(), no_constraints_float32_constraints_validation_params), nmos::control_protocol_exception);
-    BST_REQUIRE_NO_THROW(nmos::details::constraints_validation(std::numeric_limits<float_t>::min(), value::null(), value::null(), no_constraints_float32_constraints_validation_params));
+    BST_REQUIRE_NO_THROW(nmos::details::constraints_validation(std::numeric_limits<float_t>::lowest(), value::null(), value::null(), no_constraints_float32_constraints_validation_params));
     BST_REQUIRE_NO_THROW(nmos::details::constraints_validation(std::numeric_limits<float_t>::max(), value::null(), value::null(), no_constraints_float32_constraints_validation_params));
+    BST_REQUIRE_NO_THROW(nmos::details::constraints_validation(0.0, value::null(), value::null(), no_constraints_float32_constraints_validation_params));
+    BST_REQUIRE_NO_THROW(nmos::details::constraints_validation(-1000.0, value::null(), value::null(), no_constraints_float32_constraints_validation_params));
     // float64 datatype constraints validation
     const nmos::details::datatype_constraints_validation_parameters no_constraints_float64_constraints_validation_params{ no_constraints_float64_datatype, nmos::make_get_control_protocol_datatype_descriptor_handler(control_protocol_state) };
     BST_REQUIRE_THROW(nmos::details::constraints_validation(1000, value::null(), value::null(), no_constraints_float64_constraints_validation_params), nmos::control_protocol_exception);