public void TokensWithTruthyElementAccess_Parse_ReturnsCorrectExpression()
{
string input = "@.items >= 3 || @.b[123]";
IReadOnlyList <FilterExpressionToken> tokens = FilterExpressionTokenizer.Tokenize(input);
FilterSubExpression expr = FilterParser.Parse(tokens);
Assert.IsType <LogicalFilterSubExpression>(expr);
LogicalFilterSubExpression logical = expr as LogicalFilterSubExpression;
// @.items > 3
Assert.IsType <ComparisonFilterSubExpression>(logical.LeftSide);
ComparisonFilterSubExpression left = logical.LeftSide as ComparisonFilterSubExpression;
Assert.True(left.IsGreaterOrEqual);
Assert.True(left.LeftSide is PropertyFilterSubExpression p1 && p1.PropertyChain.Length == 1 && p1.PropertyChain[0] == "items");
Assert.True(left.RightSide is NumberConstantFilterSubExpression n1 && n1.Value == 3.0);
// @.b[0]
Assert.IsType <TruthyFilterSubExpression>(logical.RightSide);
TruthyFilterSubExpression tr = logical.RightSide as TruthyFilterSubExpression;
Assert.IsType <ArrayAccessFilterSubExpression>(tr.Expression);
ArrayAccessFilterSubExpression ar = tr.Expression as ArrayAccessFilterSubExpression;
Assert.True(ar.ExactElementsAccess != null && ar.ExactElementsAccess.Length == 1 && ar.ExactElementsAccess[0] == 123);
}
public void TokensWithArray_Parse_ReturnsCorrectExpression()
{
string input = "@.items[2] > 3";
IReadOnlyList <FilterExpressionToken> tokens = FilterExpressionTokenizer.Tokenize(input);
FilterSubExpression expr = FilterParser.Parse(tokens);
Assert.IsType <ComparisonFilterSubExpression>(expr);
ComparisonFilterSubExpression comp = expr as ComparisonFilterSubExpression;
Assert.IsType <ArrayAccessFilterSubExpression>(comp.LeftSide);
Assert.True((comp.RightSide as NumberConstantFilterSubExpression)?.Value == 3.0);
ArrayAccessFilterSubExpression aa = comp.LeftSide as ArrayAccessFilterSubExpression;
Assert.True(aa.ExactElementsAccess?.Length == 1 && aa.ExactElementsAccess[0] == 2);
Assert.True(aa.ExecutedOn is PropertyFilterSubExpression p && p.PropertyChain.Length == 1 && p.PropertyChain[0] == "items");
}
public void TokensWithMethodCallOnArray_Parse_ReturnsCorrectExpression()
{
string input = "@.items.next[-1].contains(2.123)";
IReadOnlyList <FilterExpressionToken> tokens = FilterExpressionTokenizer.Tokenize(input);
FilterSubExpression expr = FilterParser.Parse(tokens);
Assert.IsType <MethodCallFilterSubExpression>(expr);
MethodCallFilterSubExpression mc = expr as MethodCallFilterSubExpression;
Assert.Equal(1, mc.Arguments.Count);
Assert.Equal(2.123, (mc.Arguments[0] as NumberConstantFilterSubExpression)?.Value ?? double.MinValue, 8);
Assert.IsType <ArrayAccessFilterSubExpression>(mc.CalledOnExpression);
ArrayAccessFilterSubExpression aa = mc.CalledOnExpression as ArrayAccessFilterSubExpression;
Assert.Equal(-1, aa.ExactElementsAccess.Single());
Assert.IsType <PropertyFilterSubExpression>(aa.ExecutedOn);
PropertyFilterSubExpression prop = aa.ExecutedOn as PropertyFilterSubExpression;
Assert.Equal(2, prop.PropertyChain.Length);
Assert.Equal("items", prop.PropertyChain[0]);
Assert.Equal("next", prop.PropertyChain[1]);
}
