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| 1 | +using Expressif.Bindings; |
| 2 | +using Expressif.Functions; |
| 3 | +using Expressif.Functions.Introspection; |
| 4 | +using Expressif.Functions.Record; |
| 5 | +using Expressif.Testing.Conformance; |
| 6 | +using Expressif.Values; |
| 7 | + |
| 8 | +namespace Expressif.Testing.Functions.Record; |
| 9 | + |
| 10 | +public class NestedFieldTest |
| 11 | +{ |
| 12 | + [Conformance] |
| 13 | + public void NestedField_Valid_Value(object? value, string expression, object? expected) |
| 14 | + => Assert.That(Expression.Create(expression).Evaluate(value), Is.EqualTo(expected)); |
| 15 | + |
| 16 | + [Conformance] |
| 17 | + public void NestedField_Valid_Structured(object? value, string expression, string expected) |
| 18 | + => Assert.That(Expression.Create(expression).Evaluate(value)?.ToString(), Is.EqualTo(expected)); |
| 19 | + |
| 20 | + [Conformance] |
| 21 | + public void NestedField_Valid_Array(object? value, string expression, decimal[] expected) |
| 22 | + => Assert.That(Expression.Create(expression).Evaluate(value), Is.EqualTo(expected)); |
| 23 | + |
| 24 | + [Conformance] |
| 25 | + public void NestedField_Valid_Numeric(object? value, string expression, decimal expected) |
| 26 | + => Assert.That(Expression.Create(expression).Evaluate(value), Is.EqualTo(expected)); |
| 27 | + |
| 28 | + [TestCase("nested-field()")] |
| 29 | + [TestCase("nested-field(...{})")] |
| 30 | + public void EmptyPath_ThrowsArgumentError(string source) |
| 31 | + => Assert.That( |
| 32 | + () => Expression.Create(source).Evaluate(null), |
| 33 | + Throws.TypeOf<ArgumentException>().With.Message.Contains("at least one field name")); |
| 34 | + |
| 35 | + [TestCase("nested-field(42)")] |
| 36 | + [TestCase("nested-field(#null)")] |
| 37 | + [TestCase("nested-field({\"name\"})")] |
| 38 | + [TestCase("nested-field(...{\"missing\", 42})")] |
| 39 | + [TestCase("nested-field(...{name := \"value\"})")] |
| 40 | + public void NonTextSegment_ThrowsEvenForUnresolvedInput(string source) |
| 41 | + => Assert.That( |
| 42 | + () => Expression.Create(source).Evaluate(null), |
| 43 | + Throws.TypeOf<ArgumentException>().With.Message.Contains("must be text")); |
| 44 | + |
| 45 | + [TestCase("nested-field(...#null)")] |
| 46 | + [TestCase("nested-field(...42)")] |
| 47 | + [TestCase("nested-field(...\"name\")")] |
| 48 | + public void UnsupportedSpread_UsesSharedError(string source) |
| 49 | + => Assert.That( |
| 50 | + () => Expression.Create(source).Evaluate(null), |
| 51 | + Throws.TypeOf<SpreadArgumentException>()); |
| 52 | + |
| 53 | + [Test] |
| 54 | + public void NamedArgument_IsRejectedDuringBinding() |
| 55 | + => Assert.That( |
| 56 | + () => Expression.Create("nested-field(path := \"name\")"), |
| 57 | + Throws.InstanceOf<BindingException>()); |
| 58 | + |
| 59 | + [TestCase("name")] |
| 60 | + [TestCase("Name")] |
| 61 | + [TestCase("missing")] |
| 62 | + public void SingleSegment_MatchesFieldOnObjects(string name) |
| 63 | + { |
| 64 | + var input = new { Name = "Ada" }; |
| 65 | + var function = new NestedField(() => [new(_ => name)]); |
| 66 | + Assert.That(function.Evaluate(input), Is.EqualTo(new Field(() => name).Evaluate(input))); |
| 67 | + } |
| 68 | + |
| 69 | + [Test] |
| 70 | + public void PathArguments_UseOriginalInputInOrderAndPreserveSelectedValue() |
| 71 | + { |
| 72 | + var selected = new RecordValue(); |
| 73 | + selected.Set("value", 42); |
| 74 | + var input = new RecordValue(); |
| 75 | + input.Set("child", selected); |
| 76 | + var seen = new List<object?>(); |
| 77 | + var function = new NestedField(() => |
| 78 | + [ |
| 79 | + new(value => { seen.Add(value); return "child"; }), |
| 80 | + new(value => { seen.Add(value); return System.Array.Empty<object?>(); }, true), |
| 81 | + ]); |
| 82 | + |
| 83 | + Assert.That(function.Evaluate(input), Is.SameAs(selected)); |
| 84 | + Assert.That(seen, Is.EqualTo(new object?[] { input, input })); |
| 85 | + } |
| 86 | + |
| 87 | + [Test] |
| 88 | + public void BoundExpression_CanBeReusedConcurrently() |
| 89 | + { |
| 90 | + var expression = Expression.Create("nested-field(.path, \"value\")"); |
| 91 | + Parallel.For(0, 20, i => |
| 92 | + { |
| 93 | + var input = new RecordValue(); |
| 94 | + var child = new RecordValue(); |
| 95 | + child.Set("value", i); |
| 96 | + input.Set("path", $"child{i}"); |
| 97 | + input.Set($"child{i}", child); |
| 98 | + Assert.That(expression.Evaluate(input), Is.EqualTo(i)); |
| 99 | + }); |
| 100 | + } |
| 101 | + |
| 102 | + [Test] |
| 103 | + public void Introspection_DescribesVariadicTextPathAndDynamicOutput() |
| 104 | + { |
| 105 | + var info = new FunctionIntrospector().Describe().Single(info => info.Name == "nested-field"); |
| 106 | + using (Assert.EnterMultipleScope()) |
| 107 | + { |
| 108 | + Assert.That(info.ImplementationType, Is.EqualTo(typeof(NestedField))); |
| 109 | + Assert.That(info.Input, Is.EqualTo("any")); |
| 110 | + Assert.That(info.Output, Is.EqualTo("any")); |
| 111 | + Assert.That(info.Converted, Is.False); |
| 112 | + Assert.That(info.Reason, Is.EqualTo("Output depends on the value selected by the runtime field path.")); |
| 113 | + Assert.That(info.Parameters.Single().Name, Is.EqualTo("path")); |
| 114 | + Assert.That(info.Parameters.Single().Type, Is.EqualTo("text")); |
| 115 | + Assert.That(info.Parameters.Single().Variadic, Is.True); |
| 116 | + Assert.That(info.Parameters.Single().MinimumCardinality, Is.EqualTo(1)); |
| 117 | + } |
| 118 | + } |
| 119 | +} |
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