public void Open_ReadFlag_CSVReaderIsInstanciated()
{
var fileName = @"test_data\contacts.csv";
var fake = new FakeCSVReaderWriter();
Assert.DoesNotThrow(() => fake.Open(fileName, CSVReaderWriter.Mode.Read));
Assert.IsNotNull(fake.Reader);
}
public void Open_WriteFlag_CSVWriterIsInstanciated()
{
var fileName = @".\whatever.csv";
var fake = new FakeCSVReaderWriter();
Assert.DoesNotThrow(() => fake.Open(fileName, CSVReaderWriter.Mode.Write));
Assert.IsNotNull(fake.Writer);
}
public void WriterWritesLines()
{
// Given a writer
var textWriter = new StringWriter();
var writer = new FakeCSVReaderWriter(f => null,
f => textWriter);
// When I write a TSV
writer.Open("Arbitrary", CSVReaderWriter.Mode.Write);
writer.Write("First", "Second");
writer.Close();
// Then the string is written
Assert.Equal($"First\tSecond{Environment.NewLine}", textWriter.ToString());
}
public void WritingNothingWritesNothing()
{
var textWriter = new StringWriter();
// Given a writer
var writer = new FakeCSVReaderWriter(f => null,
f => textWriter);
// When I write an empty string
writer.Open("Arbitrary", CSVReaderWriter.Mode.Write);
writer.Write(null);
writer.Close();
// Then nothing is written
Assert.True(string.IsNullOrEmpty(textWriter.ToString()));
}
public void TooManyColumnsReadsFirstTwo()
{
// Given a reader
var streamReader = $"First\tSecond\tThird\tFourth{Environment.NewLine}".ToStream();
var reader = new FakeCSVReaderWriter(f => streamReader, f => null);
// When I read
reader.Open("Arbitrary", CSVReaderWriter.Mode.Read);
List <Tuple <string, string> > results = new List <Tuple <string, string> >();
string first;
string second;
while (reader.Read(out first, out second))
{
results.Add(new Tuple <string, string>(first, second));
}
// Then the results are correct
Assert.Equal(1, results.Count());
Assert.Equal("First", results[0].Item1);
Assert.Equal("Second", results[0].Item2);
}