[Test] Make testing of deprecated methods possible

Fatal deprecation warnings are useful for identifying inadvertent use of
deprecated features. However, we still want to retain tests of deprecated
features until those features are removed.

interfaces/cython/cantera/_cantera.pxd

@@ -71,6 +71,7 @@ cdef extern from "cantera/base/global.h" namespace "Cantera":
     cdef XML_Node* CxxGetXmlFile "Cantera::get_XML_File" (string) except +translate_exception
     cdef XML_Node* CxxGetXmlFromString "Cantera::get_XML_from_string" (string) except +translate_exception
     cdef void Cxx_make_deprecation_warnings_fatal "Cantera::make_deprecation_warnings_fatal" ()
+    cdef void Cxx_suppress_deprecation_warnings "Cantera::suppress_deprecation_warnings" ()
     cdef void Cxx_suppress_thermo_warnings "Cantera::suppress_thermo_warnings" (cbool)
     cdef string CxxGitCommit "Cantera::gitCommit" ()
 

interfaces/cython/cantera/utils.pyx

@@ -40,6 +40,9 @@ def appdelete():
 def make_deprecation_warnings_fatal():
     Cxx_make_deprecation_warnings_fatal()
 
+def suppress_deprecation_warnings():
+    Cxx_suppress_deprecation_warnings()
+
 def suppress_thermo_warnings(pybool suppress=True):
     Cxx_suppress_thermo_warnings(suppress)
 

src/base/application.h

@@ -338,6 +338,7 @@ public:
     //! prevent certain tests from failing.
     void suppress_deprecation_warnings() {
         m_suppress_deprecation_warnings = true;
+        m_fatal_deprecation_warnings = false;
     }
 
     //! Turns deprecation warnings into exceptions. Activated within the test

test/thermo/thermoFromYaml.cpp

@@ -335,8 +335,10 @@ TEST(ThermoFromYaml, PureFluid_nitrogen)
 
 TEST(ThermoFromYaml, ConstDensityThermo)
 {
+    suppress_deprecation_warnings();
     auto thermo = newThermo("thermo-models.yaml", "const-density");
     EXPECT_DOUBLE_EQ(thermo->density(), 700.0);
+    make_deprecation_warnings_fatal();
 }
 
 TEST(ThermoFromYaml, IdealSolidSolnPhase)