public void InstantiationAndProperties()
{
MidEqualsStringOperator ee = new MidEqualsStringOperator();
Assert.IsNull(ee.ValueExpression);
Assert.IsNull(ee.MessageExpression);
Assert.IsTrue(ee.StartIndex == 0);
Assert.IsTrue(ee.Length == 0);
StringConstantExpression sce = new StringConstantExpression("202030302020");
MessageExpression me = new MessageExpression(3);
ee = new MidEqualsStringOperator(me, sce, 0, 3);
Assert.IsTrue(ee.ValueExpression == sce);
Assert.IsTrue(ee.MessageExpression == me);
Assert.IsTrue(ee.StartIndex == 0);
Assert.IsTrue(ee.Length == 3);
ee.ValueExpression = null;
ee.MessageExpression = null;
ee.StartIndex = 1;
ee.Length = 2;
Assert.IsNull(ee.ValueExpression);
Assert.IsNull(ee.MessageExpression);
Assert.IsTrue(ee.StartIndex == 1);
Assert.IsTrue(ee.Length == 2);
try {
ee.ValueExpression = new BinaryConstantExpression("30313233");
Assert.Fail();
}
catch (ArgumentException) {
}
try {
ee = new MidEqualsStringOperator(me, sce, -1, 3);
Assert.Fail();
}
catch (ArgumentException) {
}
try {
ee = new MidEqualsStringOperator(me, sce, 0, -1);
Assert.Fail();
}
catch (ArgumentException) {
}
try {
ee.StartIndex = -1;
Assert.Fail();
}
catch (ArgumentException) {
}
try {
ee.Length = -1;
Assert.Fail();
}
catch (ArgumentException) {
}
}
public void Evaluate()
{
ParserContext pc = new ParserContext(ParserContext.DefaultBufferSize);
FormatterContext fc = new FormatterContext(FormatterContext.DefaultBufferSize);
MidEqualsStringOperator ee = new MidEqualsStringOperator(
new MessageExpression(1), new StringConstantExpression(string.Empty), 0, 0);
Message msg = new Message();
msg.Fields.Add(new StringField(1, null));
// Both values are empty.
pc.CurrentMessage = msg;
Assert.IsTrue(ee.EvaluateParse(ref pc));
fc.CurrentMessage = msg;
Assert.IsTrue(ee.EvaluateFormat(new StringField(3, "000000"), ref fc));
ee = new MidEqualsStringOperator(
new MessageExpression(1), new StringConstantExpression("1520253035404550"), 0, 0);
// Field value is null.
Assert.IsFalse(ee.EvaluateParse(ref pc));
Assert.IsFalse(ee.EvaluateFormat(new StringField(3, "000000"), ref fc));
ee = new MidEqualsStringOperator(
new MessageExpression(3), new StringConstantExpression(null), 0, 1);
msg = MessagesProvider.GetMessage();
// Constant is null.
pc.CurrentMessage = msg;
Assert.IsFalse(ee.EvaluateParse(ref pc));
fc.CurrentMessage = msg;
Assert.IsFalse(ee.EvaluateFormat(new StringField(3, "000000"), ref fc));
ee = new MidEqualsStringOperator(
new MessageExpression(3), new StringConstantExpression("152025303540"), 0, 1);
// Different lengths.
Assert.IsFalse(ee.EvaluateParse(ref pc));
Assert.IsFalse(ee.EvaluateFormat(new StringField(3, "000000"), ref fc));
ee = new MidEqualsStringOperator(
new MessageExpression(3), new StringConstantExpression("1520253035404551"), 0, 1);
// Different data.
Assert.IsFalse(ee.EvaluateParse(ref pc));
Assert.IsFalse(ee.EvaluateFormat(new StringField(3, "000000"), ref fc));
ee = new MidEqualsStringOperator(
new MessageExpression(3), new StringConstantExpression("999"), 2, 3);
// Equals.
Assert.IsTrue(ee.EvaluateParse(ref pc));
Assert.IsTrue(ee.EvaluateFormat(new StringField(3, "000000"), ref fc));
// The start index of the set of bytes is greater than the field value length
ee = new MidEqualsStringOperator(
new MessageExpression(52), new StringConstantExpression("123"), 6, 3);
try {
Assert.IsTrue(ee.EvaluateParse(ref pc));
Assert.Fail();
}
catch (ExpressionEvaluationException) {
}
try {
Assert.IsTrue(ee.EvaluateFormat(new StringField(3, "000000"), ref fc));
Assert.Fail();
}
catch (ExpressionEvaluationException) {
}
// There isn't enough data in the field value to get a subset of bytes
ee = new MidEqualsStringOperator(
new MessageExpression(52), new StringConstantExpression("123"), 4, 5);
try {
Assert.IsTrue(ee.EvaluateParse(ref pc));
Assert.Fail();
}
catch (ExpressionEvaluationException) {
}
try {
Assert.IsTrue(ee.EvaluateFormat(new StringField(3, "000000"), ref fc));
Assert.Fail();
}
catch (ExpressionEvaluationException) {
}
}