add first testing for EnumWidget

tests/widgets/test_enum.py

@@ -0,0 +1,56 @@
+from enum import Enum
+
+import pytest
+
+from pyqtschema import WidgetBuilder
+from pyqtschema.widgets import EnumSchemaWidget
+
+
+class Units(Enum):
+    none = '1'
+    meter = 'm'
+    seconds = 's'
+
+
+schema_enum = {
+    'title': 'UnitValue',
+    'type': 'object',
+    'properties': {
+        'value': {'title': 'Value', 'type': 'number'},
+        'unit': {'default': '1', '$ref': '#/definitions/Units'}
+    },
+    'required': ['value', 'unit'],
+    'definitions': {'Units': {'title': 'Units', 'description': 'An enumeration.', 'enum': ['1', 'm', 's']}}
+}
+
+
+def test_enum_init(qtbot):
+    builder = WidgetBuilder(schema_enum)
+    sub_schema = schema_enum['definitions']['Units']
+    widget = EnumSchemaWidget(sub_schema, {}, builder)
+
+    assert widget.count() == 3
+
+
+def test_enum_set_values(qtbot):
+    builder = WidgetBuilder(schema_enum)
+    sub_schema = schema_enum['definitions']['Units']
+    widget = EnumSchemaWidget(sub_schema, {}, builder)
+
+    widget.state = '1'
+    assert widget.currentText() == '1'
+
+    widget.state = 's'
+    assert widget.currentText() == 's'
+
+
+def test_enum_set_enum(qtbot):
+    builder = WidgetBuilder(schema_enum)
+    sub_schema = schema_enum['definitions']['Units']
+    widget = EnumSchemaWidget(sub_schema, {}, builder)
+
+    widget.state = Units.none
+    assert widget.currentText() == '1'
+
+    widget.state = Units.seconds
+    assert widget.currentText() == 's'