public void ExecutesAggregator()
{
var testee = new AggregatorStrategy <TestQuestion, string, int>();
var context = new Context();
var aggregatorMock = new Mock <IAggregator <string, string, int> >();
var expressionProviderMock = new Mock <IExpressionProvider <TestQuestion, string, int, string> >();
var question = new TestQuestion();
var expression = new TestExpression <string>();
expressionProviderMock.Setup(provider => provider.GetExpressions(question)).Returns(new[] { expression });
var definition = new TestableDefinition <string>
{
Aggregator = aggregatorMock.Object,
ExpressionProviders = new[] { expressionProviderMock.Object }
};
const int Parameter = 7;
testee.Execute(question, Parameter, definition, context);
AssertThatAggregatorIsCalledWithExpressionsFromDefinition(aggregatorMock, new[] { expression }, Parameter);
}
public void ExecutesAggregator_WhenStrategyWithMappingIsUsed()
{
const string Answer = "42";
var testee = new AggregatorStrategy <TestQuestion, string, int, int>();
var context = new Context();
var aggregator = A.Fake <IAggregator <int, string, int> >();
var expressionProvider = A.Fake <IExpressionProvider <TestQuestion, string, int, int> >();
var question = new TestQuestion();
var expression = new TestExpression <int>();
A.CallTo(() => expressionProvider.GetExpressions(question)).Returns(new[] { expression });
var definition = new TestableDefinition <int>
{
Aggregator = aggregator,
ExpressionProviders = new[] { expressionProvider }
};
const int Parameter = 7;
A.CallTo(() => aggregator.Aggregate(
A <IEnumerable <IExpression <int, int> > > .That.Matches(_ => _.Contains(expression) && _.Count() == 1),
Parameter,
A <Context> ._)).Returns(Answer);
string result = testee.Execute(question, Parameter, definition, context);
result.Should().Be(Answer);
}
public void Describe()
{
var testee = new AggregatorStrategy <TestQuestion, string, int>();
var description = testee.Describe();
description.Should().Be("aggregator strategy");
}