Add tests for inpute/output type on a few parameter types

pyqtgraph/parametertree/tests/test_parametertypes.py

@@ -1,7 +1,19 @@
+# ~*~ coding: utf8 ~*~
+import sys
+import pytest
+from pyqtgraph.Qt import QtGui, QtCore
 import pyqtgraph.parametertree as pt
 import pyqtgraph as pg
+from pyqtgraph.python2_3 import asUnicode
+from pyqtgraph.functions import eq
+import numpy as np
+
 app = pg.mkQApp()
 
+def _getWidget(param):
+    return list(param.items.keys())[0].widget
+
+
 def test_opts():
     paramSpec = [
         dict(name='bool', type='bool', readonly=True),
@@ -12,7 +24,111 @@ def test_opts():
     tree = pt.ParameterTree()
     tree.setParameters(param)
 
-    assert list(param.param('bool').items.keys())[0].widget.isEnabled() is False
-    assert list(param.param('color').items.keys())[0].widget.isEnabled() is False
+    assert _getWidget(param.param('bool')).isEnabled() is False
+    assert _getWidget(param.param('bool')).isEnabled() is False
 
 
+def test_types():
+    paramSpec = [
+        dict(name='float', type='float'),
+        dict(name='int', type='int'),
+        dict(name='str', type='str'),
+        dict(name='list', type='list', values=['x','y','z']),
+        dict(name='dict', type='list', values={'x':1, 'y':3, 'z':7}),
+        dict(name='bool', type='bool'),
+        dict(name='color', type='color'),
+    ]
+    
+    param = pt.Parameter.create(name='params', type='group', children=paramSpec)
+    tree = pt.ParameterTree()
+    tree.setParameters(param)
+
+    all_objs = {
+        'int0': 0, 'int':7, 'float': -0.35, 'bigfloat': 1e129, 'npfloat': np.float(5), 
+        'npint': np.int(5),'npinf': np.inf, 'npnan': np.nan, 'bool': True, 
+        'complex': 5+3j, 'str': 'xxx', 'unicode': asUnicode('µ'), 
+        'list': [1,2,3], 'dict': {'1': 2}, 'color': pg.mkColor('k'), 
+        'brush': pg.mkBrush('k'), 'pen': pg.mkPen('k'), 'none': None
+    }
+    if hasattr(QtCore, 'QString'):
+        all_objs['qstring'] = QtCore.QString('xxxµ')
+
+    # float
+    types = ['int0', 'int', 'float', 'bigfloat', 'npfloat', 'npint', 'npinf', 'npnan', 'bool']
+    check_param_types(param.child('float'), float, float, 0.0, all_objs, types)
+
+    # int
+    types = ['int0', 'int', 'float', 'bigfloat', 'npfloat', 'npint', 'bool']
+    inttyps = int if sys.version[0] >= '3' else (int, long) 
+    check_param_types(param.child('int'), inttyps, int, 0, all_objs, types)
+    
+    # str  (should be able to make a string out of any type)
+    types = all_objs.keys()
+    strtyp = str if sys.version[0] >= '3' else unicode
+    check_param_types(param.child('str'), strtyp, asUnicode, '', all_objs, types)
+    
+    # bool  (should be able to make a boolean out of any type?)
+    types = all_objs.keys()
+    check_param_types(param.child('bool'), bool, bool, False, all_objs, types)
+
+    # color
+    types = ['color', 'int0', 'int', 'float', 'npfloat', 'npint', 'list']
+    init = QtGui.QColor(128, 128, 128, 255)
+    check_param_types(param.child('color'), QtGui.QColor, pg.mkColor, init, all_objs, types)
+
+    
+def check_param_types(param, types, map_func, init, objs, keys):
+    """Check that parameter setValue() accepts or rejects the correct types and
+    that value() returns the correct type.
+    
+    Parameters
+    ----------
+        param : Parameter instance
+        types : type or tuple of types
+            The allowed types for this parameter to return from value().
+        map_func : function
+            Converts an input value to the expected output value.
+        init : object
+            The expected initial value of the parameter
+        objs : dict
+            Contains a variety of objects that will be tested as arguments to
+            param.setValue().
+        keys : list
+            The list of keys indicating the valid objects in *objs*. When
+            param.setValue() is teasted with each value from *objs*, we expect
+            an exception to be raised if the associated key is not in *keys*.
+    """
+    val = param.value()
+    if not isinstance(types, tuple):
+        types = (types,)
+    assert val == init and type(val) in types
+    
+    # test valid input types
+    good_inputs = [objs[k] for k in keys if k in objs]
+    good_outputs = map(map_func, good_inputs)
+    for x,y in zip(good_inputs, good_outputs):
+        param.setValue(x)
+        val = param.value()
+        if not (eq(val, y) and type(val) in types):
+            raise Exception("Setting parameter %s with value %r should have resulted in %r (types: %r), "
+                "but resulted in %r (type: %r) instead." % (param, x, y, types, val, type(val)))
+        
+    # test invalid input types
+    for k,v in objs.items():
+        if k in keys:
+            continue
+        try:
+            param.setValue(v)
+        except (TypeError, ValueError, OverflowError):
+            continue
+        except Exception as exc:
+            raise Exception("Setting %s parameter value to %r raised %r." % (param, v, exc))
+        
+        raise Exception("Setting %s parameter value to %r should have raised an exception." % (param, v))
+        
+        
+        
+    
+    
+    
+