How to use ApplyMatchesToProperty method of NUnit.Framework.Syntax.AnotherConstraint class

Best Nunit code snippet using NUnit.Framework.Syntax.AnotherConstraint.ApplyMatchesToProperty

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ArbitraryConstraintMatching.cs

Source: ArbitraryConstraintMatching.cs Github

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1// Copyright (c) Charlie Poole, Rob Prouse and Contributors. MIT License - see LICENSE.txt
2
3using System;
4using System.Collections.Generic;
5using NUnit.Framework.Constraints;
6
7namespace NUnit.Framework.Syntax
8{
9    [TestFixture]
10    public class ArbitraryConstraintMatching
11    {
12        readonly Constraint custom = new CustomConstraint();
13        readonly Constraint another = new AnotherConstraint();
14
15        [Test]
16        public void CanMatchCustomConstraint()
17        {
18            IResolveConstraint constraint = new ConstraintExpression().Matches(custom);
19            Assert.That(constraint.Resolve().ToString(), Is.EqualTo("<custom>"));
20        }
21
22        [Test]
23        public void CanMatchCustomConstraintAfterPrefix()
24        {
25            IResolveConstraint constraint = Is.All.Matches(custom);
26            Assert.That(constraint.Resolve().ToString(), Is.EqualTo("<all <custom>>"));
27        }
28
29        [Test]
30        public void CanMatchCustomConstraintsUnderAndOperator()
31        {
32            IResolveConstraint constraint = Is.All.Matches(custom).And.Matches(another);
33            Assert.That(constraint.Resolve().ToString(), Is.EqualTo("<all <and <custom> <another>>>")); 
34        }
35
36        [Test]
37        public void CanMatchPredicate()
38        {
39            IResolveConstraint constraint = new ConstraintExpression().Matches(new Predicate<int>(IsEven));
40            Assert.That(constraint.Resolve().ToString(), Is.EqualTo("<predicate>"));
41            Assert.That(42, constraint);
42        }
43
44        bool IsEven(int num)
45        {
46            return (num & 1) == 0;
47        }
48
49        [Test]
50        public void CanMatchLambda()
51        {
52            IResolveConstraint constraint = new ConstraintExpression().Matches<int>( (x) => (x & 1) == 0);
53            Assert.That(constraint.Resolve().ToString(), Is.EqualTo("<predicate>"));
54            Assert.That(42, constraint);
55        }
56
57        class CustomConstraint : Constraint
58        {
59            public override ConstraintResult ApplyTo<TActual>(TActual actual)
60            {
61                throw new NotImplementedException();
62            }
63        }
64
65        class AnotherConstraint : CustomConstraint
66        {
67        }
68
69        [Test]
70        public void ApplyMatchesToProperty()
71        {
72            var unit = new Unit();
73
74            // All forms should pass
75            Assert.That(unit, Has.Property("Items").With.Property("Count").EqualTo(5));
76            Assert.That(unit, Has.Property("Items").With.Count.EqualTo(5));
77            Assert.That(unit, Has.Property("Items").Property("Count").EqualTo(5));
78            Assert.That(unit, Has.Property("Items").Count.EqualTo(5));
79
80            // This is the one the bug refers to
81            Assert.That(unit, Has.Property("Items").Matches(Has.Count.EqualTo(5)));
82        }
83
84        private class Unit
85        {
86            public List<int> Items { get; }
87            public Unit()
88            {
89                Items = new List<int>(new int[] { 1, 2, 3, 4, 5 });
90            }
91        }
92    }
93}
94
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