Test para ningun y un parametro en la entrada OK

amedio/.project

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>StringCalculator</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.python.pydev.PyDevBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.python.pydev.pythonNature</nature>
+	</natures>
+</projectDescription>

amedio/.pydevproject

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<?eclipse-pydev version="1.0"?>
+
+<pydev_project>
+<pydev_property name="org.python.pydev.PYTHON_PROJECT_INTERPRETER">Default</pydev_property>
+<pydev_property name="org.python.pydev.PYTHON_PROJECT_VERSION">python 2.7</pydev_property>
+<pydev_pathproperty name="org.python.pydev.PROJECT_SOURCE_PATH">
+<path>/StringCalculator</path>
+<path>/StringCalculator/src</path>
+</pydev_pathproperty>
+</pydev_project>

amedio/src/main/Calculator.py

@@ -0,0 +1,13 @@
+class Calculator(object):
+
+    def __init__(self):
+        pass
+
+    def add(self, addParams):
+
+        result = 0
+
+        if addParams != "":
+            result = int(addParams)
+
+        return result

amedio/src/test/CalculatorTest.py

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+import unittest
+from src.main import Calculator
+
+
+class CalculatorTest(unittest.TestCase):
+
+    def testAddNoParams(self):
+
+        calc = Calculator.Calculator()
+
+        expected = 0
+        resulted = calc.add("")
+
+        self.assertEquals(expected, resulted, "Adding no params Error")
+
+        pass
+
+    def testAddOneParam(self):
+
+        calc = Calculator.Calculator()
+
+        expected = 1
+        resulted = calc.add("1")
+
+        self.assertEquals(expected, resulted, "Adding one param Error")
+
+        pass
+
+
+if __name__ == "__main__":
+    unittest.main()