fixing and splitting test_input_version

Author: djarecka

nipype/interfaces/base/tests/test_core.py

@@ -177,74 +177,76 @@ def __init__(self, **inputs):
     assert 'ec5755e07287e04a4b409e03b77a517c' == hashvalue
 
 
-def test_input_version():
-    class InputSpec(nib.TraitedSpec):
-        foo = nib.traits.Int(desc='a random int', min_ver='0.9')
+class MinVerInputSpec(nib.TraitedSpec):
+    foo = nib.traits.Int(desc='a random int', min_ver='0.9')
+
+class MaxVerInputSpec(nib.TraitedSpec):
+    foo = nib.traits.Int(desc='a random int', max_ver='0.7')
 
+
+def test_input_version_1():
     class DerivedInterface1(nib.BaseInterface):
-        input_spec = InputSpec
+        input_spec = MinVerInputSpec
 
     obj = DerivedInterface1()
     obj._check_version_requirements(obj.inputs)
 
     config.set('execution', 'stop_on_unknown_version', True)
 
-    with pytest.raises(Exception):
+    with pytest.raises(ValueError) as excinfo:
         obj._check_version_requirements(obj.inputs)
+    assert "no version information" in str(excinfo.value)
 
     config.set_default_config()
 
-    class InputSpec(nib.TraitedSpec):
-        foo = nib.traits.Int(desc='a random int', min_ver='0.9')
 
+def test_input_version_2():
     class DerivedInterface1(nib.BaseInterface):
-        input_spec = InputSpec
+        input_spec = MinVerInputSpec
         _version = '0.8'
 
     obj = DerivedInterface1()
     obj.inputs.foo = 1
-    with pytest.raises(Exception):
-        obj._check_version_requirements()
+    with pytest.raises(Exception) as excinfo:
+        obj._check_version_requirements(obj.inputs)
+    assert "version 0.8 < required 0.9" in str(excinfo.value)
 
-    class InputSpec(nib.TraitedSpec):
-        foo = nib.traits.Int(desc='a random int', min_ver='0.9')
 
+def test_input_version_3():
     class DerivedInterface1(nib.BaseInterface):
-        input_spec = InputSpec
+        input_spec = MinVerInputSpec
         _version = '0.10'
 
     obj = DerivedInterface1()
     obj._check_version_requirements(obj.inputs)
 
-    class InputSpec(nib.TraitedSpec):
-        foo = nib.traits.Int(desc='a random int', min_ver='0.9')
 
+def test_input_version_4():
     class DerivedInterface1(nib.BaseInterface):
-        input_spec = InputSpec
+        input_spec = MinVerInputSpec
         _version = '0.9'
 
     obj = DerivedInterface1()
     obj.inputs.foo = 1
     obj._check_version_requirements(obj.inputs)
 
-    class InputSpec(nib.TraitedSpec):
-        foo = nib.traits.Int(desc='a random int', max_ver='0.7')
 
+def test_input_version_5():
     class DerivedInterface2(nib.BaseInterface):
-        input_spec = InputSpec
+        input_spec = MaxVerInputSpec
         _version = '0.8'
 
     obj = DerivedInterface2()
     obj.inputs.foo = 1
-    with pytest.raises(Exception):
+    with pytest.raises(Exception) as excinfo:
         obj._check_version_requirements(obj.inputs)
+    assert "version 0.8 > required 0.7" in str(excinfo.value)
 
-    class InputSpec(nib.TraitedSpec):
-        foo = nib.traits.Int(desc='a random int', max_ver='0.9')
 
+def test_input_version_6():
     class DerivedInterface1(nib.BaseInterface):
-        input_spec = InputSpec
-        _version = '0.9'
+        input_spec = MaxVerInputSpec
+        _version = '0.7'
 
     obj = DerivedInterface1()
     obj.inputs.foo = 1