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Merge pull request #662 from stakx/invocationshape
Extract invocation matching logic into `InvocationShape`
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| //Copyright (c) 2007. Clarius Consulting, Manas Technology Solutions, InSTEDD | ||
| //https://github.com/moq/moq4 | ||
| //All rights reserved. | ||
| // | ||
| //Redistribution and use in source and binary forms, | ||
| //with or without modification, are permitted provided | ||
| //that the following conditions are met: | ||
| // | ||
| // * Redistributions of source code must retain the | ||
| // above copyright notice, this list of conditions and | ||
| // the following disclaimer. | ||
| // | ||
| // * Redistributions in binary form must reproduce | ||
| // the above copyright notice, this list of conditions | ||
| // and the following disclaimer in the documentation | ||
| // and/or other materials provided with the distribution. | ||
| // | ||
| // * Neither the name of Clarius Consulting, Manas Technology Solutions or InSTEDD nor the | ||
| // names of its contributors may be used to endorse | ||
| // or promote products derived from this software | ||
| // without specific prior written permission. | ||
| // | ||
| //THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND | ||
| //CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, | ||
| //INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | ||
| //MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | ||
| //DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR | ||
| //CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | ||
| //SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | ||
| //BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | ||
| //SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | ||
| //INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | ||
| //WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | ||
| //NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | ||
| //OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | ||
| //SUCH DAMAGE. | ||
| // | ||
| //[This is the BSD license, see | ||
| // http://www.opensource.org/licenses/bsd-license.php] | ||
|
|
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| using System; | ||
| using System.Collections.Generic; | ||
| using System.Diagnostics; | ||
| using System.Linq; | ||
| using System.Linq.Expressions; | ||
| using System.Reflection; | ||
|
|
||
| namespace Moq | ||
| { | ||
| /// <summary> | ||
| /// Describes the "shape" of an invocation against which concrete <see cref="Invocation"/>s can be matched. | ||
| /// </summary> | ||
| internal readonly struct InvocationShape | ||
| { | ||
| private readonly MethodInfo method; | ||
| private readonly IMatcher[] argumentMatchers; | ||
|
|
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| public InvocationShape(MethodInfo method, IReadOnlyList<Expression> arguments) | ||
| { | ||
| this.method = method; | ||
| this.argumentMatchers = GetArgumentMatchers(arguments, method.GetParameters()); | ||
| } | ||
|
|
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| public InvocationShape(MethodInfo method, IMatcher[] argumentMatchers) | ||
| { | ||
| this.method = method; | ||
| this.argumentMatchers = argumentMatchers; | ||
| } | ||
|
|
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| public IReadOnlyList<IMatcher> ArgumentMatchers => this.argumentMatchers; | ||
|
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| public MethodInfo Method => this.method; | ||
|
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| public bool IsMatch(Invocation invocation) | ||
| { | ||
| var arguments = invocation.Arguments; | ||
| if (this.argumentMatchers.Length != arguments.Length) | ||
| { | ||
| return false; | ||
| } | ||
|
|
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| if (invocation.Method != this.method && !this.IsOverride(invocation.Method)) | ||
| { | ||
| return false; | ||
| } | ||
|
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| for (int i = 0, n = this.argumentMatchers.Length; i < n; ++i) | ||
| { | ||
| if (this.argumentMatchers[i].Matches(arguments[i]) == false) | ||
| { | ||
| return false; | ||
| } | ||
| } | ||
|
|
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| return true; | ||
| } | ||
|
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| private bool IsOverride(MethodInfo invocationMethod) | ||
| { | ||
| var method = this.method; | ||
|
|
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| if (!method.DeclaringType.IsAssignableFrom(invocationMethod.DeclaringType)) | ||
| { | ||
| return false; | ||
| } | ||
|
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| if (!method.Name.Equals(invocationMethod.Name, StringComparison.Ordinal)) | ||
| { | ||
| return false; | ||
| } | ||
|
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| if (method.ReturnType != invocationMethod.ReturnType) | ||
| { | ||
| return false; | ||
| } | ||
|
|
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| if (method.IsGenericMethod) | ||
| { | ||
| if (!invocationMethod.GetGenericArguments().SequenceEqual(method.GetGenericArguments(), AssignmentCompatibilityTypeComparer.Instance)) | ||
| { | ||
| return false; | ||
| } | ||
| } | ||
| else | ||
| { | ||
| if (!invocationMethod.HasSameParameterTypesAs(method)) | ||
| { | ||
| return false; | ||
| } | ||
| } | ||
|
|
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| return true; | ||
| } | ||
|
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| private static IMatcher[] GetArgumentMatchers(IReadOnlyList<Expression> arguments, ParameterInfo[] parameters) | ||
| { | ||
| Debug.Assert(arguments != null); | ||
| Debug.Assert(parameters != null); | ||
| Debug.Assert(arguments.Count == parameters.Length); | ||
|
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| var n = parameters.Length; | ||
| var argumentMatchers = new IMatcher[n]; | ||
| for (int i = 0; i < n; ++i) | ||
| { | ||
| argumentMatchers[i] = MatcherFactory.CreateMatcher(arguments[i], parameters[i]); | ||
| } | ||
| return argumentMatchers; | ||
| } | ||
|
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| private sealed class AssignmentCompatibilityTypeComparer : IEqualityComparer<Type> | ||
| { | ||
| public static readonly AssignmentCompatibilityTypeComparer Instance = new AssignmentCompatibilityTypeComparer(); | ||
|
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| public bool Equals(Type x, Type y) | ||
| { | ||
| return y.IsAssignableFrom(x); | ||
| } | ||
|
|
||
| int IEqualityComparer<Type>.GetHashCode(Type obj) => throw new NotSupportedException(); | ||
| } | ||
| } | ||
| } |
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