[Test] Skip conversion tests if no Python package is being built

Converting between different mechanism formats require at least
the "minimal" Python package to be built.

test/SConscript

@@ -96,6 +96,8 @@ def addTestProgram(subdir, progName, env_vars={}):
     testenv['ENV'].update(env_vars)
     if env["skip_slow_tests"]:
         testenv.Append(CPPDEFINES=["CT_SKIP_SLOW"])
+    if env["python_package"] == "none":
+        testenv.Append(CPPDEFINES=["CT_NO_PYTHON"])
     program = testenv.Program(pjoin(subdir, progName),
                               multi_glob(testenv, subdir, 'cpp'))
     passedFile = File(pjoin(str(program[0].dir), '%s.passed' % program[0].name))

test/kinetics/rates.cpp

@@ -9,6 +9,7 @@
 namespace Cantera
 {
 
+#ifndef CT_NO_PYTHON
 TEST(FracCoeff, ConvertFracCoeff)
 {
     IdealGasPhase thermo1("../data/frac.cti", "gas");
@@ -33,6 +34,7 @@ TEST(FracCoeff, ConvertFracCoeff)
         }
     }
 }
+#endif
 
 class FracCoeffTest : public testing::Test
 {
@@ -181,11 +183,13 @@ public:
     size_t nRxn, nSpec;
 };
 
+#ifndef CT_NO_PYTHON
 TEST_F(NegativePreexponentialFactor, fromCti)
 {
     setup("../data/noxNeg.cti");
     testNetProductionRates();
 }
+#endif
 
 TEST_F(NegativePreexponentialFactor, fromYaml)
 {

test/thermo/phaseConstructors.cpp

@@ -118,6 +118,7 @@ TEST(IonsFromNeutralConstructor, fromScratch)
     EXPECT_NEAR(mu[1], -2.88157316e+06, 1e-1);
 }
 
+#ifndef CT_NO_PYTHON
 class CtiConversionTest : public testing::Test
 {
 public:
@@ -177,6 +178,7 @@ TEST_F(ChemkinConversionTest, FailedConversion) {
     ASSERT_THROW(ck2cti("h2o2_missingThermo.inp"),
                  CanteraError);
 }
+#endif
 
 class ConstructFromScratch : public testing::Test
 {

test_problems/SConscript

@@ -200,8 +200,9 @@ CompileAndTest('CpJump', 'CpJump', 'CpJump', 'output_blessed.txt')
 
 diamond = CompileAndTest('diamondSurf-yaml', 'diamondSurf', 'diamondSurf',
     'runDiamond_blessed.out', options='diamond.yaml')
-Test('diamondSurf-cti', 'diamondSurf', diamond.program, 'runDiamond_blessed.out',
-     options='diamond.cti')  # @TODO: remove after Cantera 2.6
+if env["python_package"] != "none":
+    Test('diamondSurf-cti', 'diamondSurf', diamond.program, 'runDiamond_blessed.out',
+        options='diamond.cti')  # @TODO: remove after Cantera 2.6
 Test('diamondSurf-xml', 'diamondSurf', diamond.program, 'runDiamond_blessed.out',
      options='diamond.xml')  # @TODO: remove after Cantera 2.6