public void TestParser(string instructions, int expectedCount)
{
var singleInstructionMock = new Mock <ISingleInstructionParser>(MockBehavior.Strict);
var testInstruction = new RelativeInstruction(
direction: new RelativeDirection(90),
travelDistance: 1);
singleInstructionMock.Setup(p => p.ParseSingleInstruction(It.IsNotNull <string>())).
Returns(testInstruction);
var fullParser = new RelativeInstructionParser(
singleInstructionParser: singleInstructionMock.Object);
var result = fullParser.ParseRawInstructions(instructions);
// Make sure result is not null.
Assert.NotNull(result);
// Make sure the number of things we expected came back.
Assert.Equal(expectedCount, result.Count);
// Make sure the parser mock got called as many times as we expect.
singleInstructionMock.Verify(p => p.ParseSingleInstruction(It.IsNotNull <string>()), Times.Exactly(expectedCount));
// Make sure the items returned by the single parser
// get included in the final output.
foreach (var item in result)
{
Assert.Equal(testInstruction, item);
}
}
public void ParserThrowsArgumentNull()
{
var instructionParserMock = new Mock <ISingleInstructionParser>(MockBehavior.Strict);
var fullParser = new RelativeInstructionParser(instructionParserMock.Object);
Assert.Throws <ArgumentNullException>(() =>
fullParser.ParseRawInstructions(null));
}
