test: add more tests for individual strategies

tests/test_strategies.py

@@ -72,6 +72,11 @@ def variable_boolean_strategy(draw, name=None, label=None, units=None, covariate
     )
 
 
+@given(variable_boolean_strategy())
+def test_variable_boolean_strategy_creation(o):
+    assert o
+
+
 @st.composite
 def variable_integer_strategy(draw, name=None, label=None, units=None, covariate=None):
     name, label, units, covariate = draw(
@@ -113,6 +118,11 @@ def variable_integer_strategy(draw, name=None, label=None, units=None, covariate
     )
 
 
+@given(variable_integer_strategy())
+def test_variable_integer_strategy_creation(o):
+    assert o
+
+
 @st.composite
 def variable_real_strategy(draw, name=None, label=None, units=None, covariate=None):
     name, label, units, covariate = draw(
@@ -148,6 +158,11 @@ def variable_real_strategy(draw, name=None, label=None, units=None, covariate=No
     )
 
 
+@given(variable_real_strategy())
+def test_variable_real_strategy_creation(o):
+    assert o
+
+
 @st.composite
 def variable_probability_strategy(
     draw, name=None, label=None, units=None, covariate=None
@@ -173,6 +188,11 @@ def variable_probability_strategy(
     )
 
 
+@given(variable_probability_strategy())
+def test_variable_probability_strategy_creation(o):
+    assert o
+
+
 @st.composite
 def variable_probability_sample_strategy(
     draw, name=None, label=None, units=None, covariate=None
@@ -198,6 +218,11 @@ def variable_probability_sample_strategy(
     )
 
 
+@given(variable_probability_sample_strategy())
+def test_variable_probability_sample_strategy_creation(o):
+    assert o
+
+
 @st.composite
 def variable_probability_distribution_strategy(
     draw, name=None, label=None, units=None, covariate=None
@@ -223,6 +248,11 @@ def variable_probability_distribution_strategy(
     )
 
 
+@given(variable_probability_distribution_strategy())
+def test_variable_probability_distribution_strategy_creation(o):
+    assert o
+
+
 @st.composite
 def variable_sigmoid_strategy(draw, name=None, label=None, units=None, covariate=None):
     name, label, units, covariate = draw(
@@ -246,6 +276,11 @@ def variable_sigmoid_strategy(draw, name=None, label=None, units=None, covariate
     )
 
 
+@given(variable_sigmoid_strategy())
+def test_variable_sigmoid_strategy_creation(o):
+    assert o
+
+
 @st.composite
 def variable_class_strategy(draw, name=None, label=None, units=None, covariate=None):
     name, label, units, covariate = draw(
@@ -269,6 +304,11 @@ def variable_class_strategy(draw, name=None, label=None, units=None, covariate=N
     )
 
 
+@given(variable_class_strategy())
+def test_variable_class_strategy_creation(o):
+    assert o
+
+
 VARIABLE_STRATEGIES = (
     variable_boolean_strategy,
     variable_integer_strategy,