[Unittest] Add tests for UnitSystem.defaults

Also: remove redundant tests for Units objects.
Cantera · Jul 18, 2021 · f25bca8 · f25bca8
1 parent f652aa4
commit f25bca8
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Showing 2 changed files with 48 additions and 10 deletions.
diff --git a/interfaces/cython/cantera/test/test_utils.py b/interfaces/cython/cantera/test/test_utils.py
@@ -5,6 +5,54 @@
 
 from cantera._cantera import _py_to_any_to_py
 
+
+class TestUnitSystem(utilities.CanteraTest):
+
+    def test_default(self):
+        defaults = ct.UnitSystem().defaults
+        checks = {
+            "activation-energy": "J/kmol",
+            "current": "A",
+            "energy": "J",
+            "length": "m",
+            "mass": "kg",
+            "pressure": "Pa",
+            "quantity": "kmol",
+            "temperature": "K",
+            "time": "s",
+        }
+        for dim, unit in defaults.items():
+            self.assertIn(dim, checks)
+            self.assertEqual(checks[dim], unit)
+
+    def test_cgs(self):
+        system = ct.UnitSystem({
+            "length": "cm", "mass": "g", "time": "s",
+            "quantity": "mol", "pressure": "dyn/cm^2", "energy": "erg",
+            "activation-energy": "cal/mol"})
+        defaults = system.defaults
+        checks = {
+            "activation-energy": "cal/mol",
+            "current": "A",
+            "energy": "erg",
+            "length": "cm",
+            "mass": "g",
+            "pressure": "dyn/cm^2",
+            "quantity": "mole",
+            "temperature": "K",
+            "time": "s",
+        }
+        for dim, unit in defaults.items():
+            self.assertIn(dim, checks)
+            self.assertEqual(checks[dim], unit)
+
+    def test_raises(self):
+        with self.assertRaisesRegex(ct.CanteraError, "non-unity conversion factor"):
+            ct.UnitSystem({"temperature": "2 K"})
+        with self.assertRaisesRegex(ct.CanteraError, "non-unity conversion factor"):
+            ct.UnitSystem({"current": "2 A"})
+
+
 class TestPyToAnyValue(utilities.CanteraTest):
 
     def check_conversion(self, value, check_type=None):

diff --git a/test/general/test_units.cpp b/test/general/test_units.cpp
@@ -14,16 +14,6 @@ TEST(Units, from_string) {
     EXPECT_EQ(Units("0.001 m^3").str(), "0.001 m^3");
 }
 
-TEST(Units, string_output) {
-    EXPECT_EQ(Units(1.).str(), "1.0");
-    EXPECT_EQ(Units(1., 1.).str(), "1.0 kg");
-    EXPECT_EQ(Units(1., 2.).str(), "1.0 kg^2");
-    EXPECT_EQ(Units(1., .5).str(), "1.0 kg^0.5");
-    EXPECT_EQ(Units(1., -1.).str(), "1.0 kg^-1");
-    EXPECT_EQ(Units(1., 1., -3.).str(), "1.0 kg * m^-3");
-    EXPECT_EQ(Units(.001, 0., 3.).str(), "0.001 m^3");
-}
-
 TEST(Units, copy_construct) {
     EXPECT_EQ(Units(Units(1.)).str(), "1.0");
     EXPECT_EQ(Units(Units(1., 1.)).str(), "1.0 kg");