Add TestCreateTwoOperations

Adds test to generate project with simple task set with some fixes to task I/O.

Note that this MR might have conflicts with !2922 (merged). Recommend merging !2922 (merged) first.

data/projects/src/math_op.py

+# =============================================================================
+#
+#  Copyright (c) Kitware, Inc.
+#  All rights reserved.
+#  See LICENSE.txt for details.
+#
+#  This software is distributed WITHOUT ANY WARRANTY; without even
+#  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+#  PURPOSE.  See the above copyright notice for more information.
+#
+# =============================================================================
+
+""" math_op.py Simple operation for testing task behavior."""
+
+import math
+
+import smtk
+import smtk.attribute
+import smtk.io
+import smtk.operation
+
+sbt_string = """
+<SMTK_AttributeResource Version="7">
+  <Definitions>
+    <AttDef Type="MathOp" BaseType="operation">
+      <ItemDefinitions>
+        <Int Name="IntValue">
+          <BriefDescription>Operation Will compute squared value</BriefDescription>
+        </Int>
+        <Double Name="DoubleValue" Label="Double Value">
+          <BriefDescription>Operation Will compute square root</BriefDescription>
+        </Double>
+      </ItemDefinitions>
+    </AttDef>
+
+    <AttDef Type="MathOpResult" BaseType="result">
+      <ItemDefinitions>
+        <Int Name="IntValueSquared" />
+        <Double Name="DoubleValueRoot" />
+      </ItemDefinitions>
+    </AttDef>
+  </Definitions>
+
+  <Views>
+    <View Type="Instanced" Title="MathOp" TopLevel="true"
+      FilterByAdvanceLevel="false" FilterByCategory="false"
+      UseScrollingContainer="false">
+      <InstancedAttributes>
+        <Att Type="MathOp" Name="MathOp" />
+      </InstancedAttributes>
+    </View>
+  </Views>
+</SMTK_AttributeResource>
+"""
+
+
+class MathOp(smtk.operation.Operation):
+
+    def __init__(self):
+        smtk.operation.Operation.__init__(self)
+
+    def name(self):
+        return "Math Operation"
+
+    def operateInternal(self):
+        # Do some math
+        int_value = self.parameters().findInt('IntValue').value()
+        int_squared = int_value * int_value
+        dbl_value = self.parameters().findDouble('DoubleValue').value()
+        dbl_root = math.sqrt(math.fabs(dbl_value))
+
+        # Add note to logger
+        info = 'MathOp computed int_squared {}, dbl_root {}'.format(int_squared, dbl_root)
+        self.log().addRecord(smtk.io.Logger.Info, info)
+
+        # Return with success
+        result = self.createResult(smtk.operation.Operation.Outcome.SUCCEEDED)
+        result.findInt('IntValueSquared').setValue(int_squared)
+        result.findDouble('DoubleValueRoot').setValue(dbl_root)
+        return result
+
+    def createSpecification(self):
+        spec = self.createBaseSpecification()
+
+        reader = smtk.io.AttributeReader()
+        hasErr = reader.readContents(spec, sbt_string, self.log())
+        if hasErr:
+            message = 'Error loading specification'
+            self.log().addError(message)
+            raise RuntimeError(message)
+        return spec