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) { } }