public void QuoteImporter_GivenMockFile_ShouldInsertIntoMockDatabase()
{
// 1. ReadFileListOfLines mock
string actualLineFromFile = "";
Func <IEnumerable <string> > readFileListOfLines = () =>
{
var listOfLines = new[] { "title, quote here" };
actualLineFromFile = listOfLines[0];
return(listOfLines);
};
// 2. ParseLine mock
string actualLineSentToParseLine = "";
Func <string, Quote> parseLine = s =>
{
actualLineSentToParseLine = s;
var quote = new Quote {
Title = "title2", Body = "quote here2"
};
return(quote);
};
// 3. InsertQuoteIntoDatabase mock
// using a closure
IList <Quote> actualQuotes = new List <Quote>();
Action <Quote> insertQuoteIntoDatabase = quote =>
{
actualQuotes.Add(quote);
};
// compose. Action is a delegate - doesn't return anything
Action run = () => ImporterFunctional.QuoteImporter(
readFileListOfLines, parseLine, insertQuoteIntoDatabase);
run();
// 1. Testing the ReadFileListOfLines mock was called
Assert.Equal("title, quote here", actualLineFromFile);
// 2. Testing the mock parser received the data from the ReadFileListOfLines mock
Assert.Equal("title, quote here", actualLineSentToParseLine);
// 3. Testing the mock database received the data from the ParseLine mock
Assert.Equal("title2", actualQuotes[0].Title);
Assert.Equal("quote here2", actualQuotes[0].Body);
}
