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MockDefaultValueProviderFixture.cs
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MockDefaultValueProviderFixture.cs
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// Copyright (c) 2007, Clarius Consulting, Manas Technology Solutions, InSTEDD.
// All rights reserved. Licensed under the BSD 3-Clause License; see License.txt.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Xunit;
namespace Moq.Tests
{
public class MockDefaultValueProviderFixture
{
[Fact]
public void ProvidesMockValue()
{
var mock = new Mock<IFoo>();
var value = GetDefaultValueForProperty(nameof(IFoo.Bar), mock);
Assert.NotNull(value);
Assert.True(value is IMocked);
}
[Fact]
public void CachesProvidedValue()
{
var mock = new Mock<IFoo>() { DefaultValue = DefaultValue.Mock };
var value1 = mock.Object.Bar;
var value2 = mock.Object.Bar;
Assert.Same(value1, value2);
}
[Fact]
public void ProvidesEmptyValueIfNotMockeable()
{
var mock = new Mock<IFoo>();
var value = GetDefaultValueForProperty(nameof(IFoo.Value), mock);
Assert.Equal(default(string), value);
value = GetDefaultValueForProperty(nameof(IFoo.Indexes), mock);
Assert.True(value is IEnumerable<int> && ((IEnumerable<int>)value).Count() == 0);
value = GetDefaultValueForProperty(nameof(IFoo.Bars), mock);
Assert.True(value is IBar[] && ((IBar[])value).Length == 0);
}
[Fact]
public void NewMocksHaveSameBehaviorAndDefaultValueAsOwner()
{
var mock = new Mock<IFoo>();
var value = GetDefaultValueForProperty(nameof(IFoo.Bar), mock);
var barMock = Mock.Get((IBar)value);
Assert.Equal(mock.Behavior, barMock.Behavior);
Assert.Equal(mock.DefaultValue, barMock.DefaultValue);
}
[Fact]
public void NewMocksHaveSameCallBaseAsOwner()
{
var mock = new Mock<IFoo> { CallBase = true };
var value = GetDefaultValueForProperty(nameof(IFoo.Bar), mock);
var barMock = Mock.Get((IBar)value);
Assert.Equal(mock.CallBase, barMock.CallBase);
}
[Fact]
public void CreatedMockIsVerifiedWithOwner()
{
var mock = new Mock<IFoo>() { DefaultValue = DefaultValue.Mock };
var bar = mock.Object.Bar;
var barMock = Mock.Get(bar);
barMock.Setup(b => b.Do()).Verifiable();
var ex = Assert.Throws<MockException>(() => mock.Verify());
Assert.True(ex.IsVerificationError);
}
[Fact]
public void DefaultValueIsNotChangedWhenPerformingInternalInvocation()
{
var mockBar = new Mock<IBar> { DefaultValue = DefaultValue.Empty };
var mockFoo = new Mock<IFoo>();
mockFoo.SetupSet(m => m.Bar = mockBar.Object);
Assert.Equal(DefaultValue.Empty, mockBar.DefaultValue);
}
[Fact]
public void Inner_mocks_inherit_switches_of_parent_mock()
{
const Switches expectedSwitches = Switches.CollectDiagnosticFileInfoForSetups;
var parentMock = new Mock<IFoo>() { DefaultValue = DefaultValue.Mock, Switches = expectedSwitches };
var innerMock = Mock.Get(parentMock.Object.Bar);
Assert.Equal(expectedSwitches, actual: innerMock.Switches);
}
[Fact]
public void Provides_completed_Task_containing_default_value_for_Task_of_value_type()
{
var mock = new Mock<IFoo>() { DefaultValue = DefaultValue.Mock };
var task = (Task<int>)GetDefaultValueForProperty(nameof(IFoo.TaskOfValueType), mock);
Assert.NotNull(task);
Assert.True(task.IsCompleted);
Assert.Equal(default(int), task.Result);
}
[Fact]
public void Provides_completed_Task_containing_empty_value_for_Task_of_emptyable_type()
{
var mock = new Mock<IFoo>() { DefaultValue = DefaultValue.Mock };
var task = (Task<int[]>)GetDefaultValueForProperty(nameof(IFoo.TaskOfEmptyableType), mock);
Assert.NotNull(task);
Assert.True(task.IsCompleted);
Assert.NotNull(task.Result);
Assert.Empty(task.Result);
}
[Fact]
public void Provides_completed_Task_containing_null_for_Task_of_unmockable_reference_type()
{
var mock = new Mock<IFoo>() { DefaultValue = DefaultValue.Mock };
var task = (Task<IndexOutOfRangeException>)GetDefaultValueForProperty(nameof(IFoo.TaskOfUnmockableReferenceType), mock);
Assert.NotNull(task);
Assert.True(task.IsCompleted);
Assert.Null(task.Result);
}
[Fact]
public void Provides_completed_Task_containing_mocked_value_for_Task_of_mockable_type()
{
var mock = new Mock<IFoo>() { DefaultValue = DefaultValue.Mock };
var task = (Task<IBar>)GetDefaultValueForProperty(nameof(IFoo.TaskOfMockableType), mock);
Assert.NotNull(task);
Assert.True(task.IsCompleted);
Assert.NotNull(task.Result);
Assert.True(task.Result is IMocked);
}
[Fact]
public void Provides_completed_Task_containing_completed_Task_containing_whatever_for_Task_of_Task_of_whatever()
{
var mock = new Mock<IFoo>() { DefaultValue = DefaultValue.Mock };
var task = (Task<Task<int>>)GetDefaultValueForProperty(nameof(IFoo.TaskOfTaskOfWhatever), mock);
Assert.NotNull(task);
Assert.True(task.IsCompleted);
Assert.NotNull(task.Result);
Assert.True(task.Result.IsCompleted);
}
[Fact]
public void Provides_completed_ValueTask_containing_default_value_for_ValueTask_of_value_type()
{
var mock = new Mock<IFoo>() { DefaultValue = DefaultValue.Mock };
var task = (ValueTask<int>)GetDefaultValueForProperty(nameof(IFoo.ValueTaskOfValueType), mock);
Assert.True(task.IsCompleted);
Assert.Equal(default(int), task.Result);
}
[Fact]
public void Provides_completed_ValueTask_containing_empty_value_for_ValueTask_of_emptyable_type()
{
var mock = new Mock<IFoo>() { DefaultValue = DefaultValue.Mock };
var task = (ValueTask<int[]>)GetDefaultValueForProperty(nameof(IFoo.ValueTaskOfEmptyableType), mock);
Assert.True(task.IsCompleted);
Assert.NotNull(task.Result);
Assert.Empty(task.Result);
}
[Fact]
public void Provides_completed_ValueTask_containing_null_for_Task_of_unmockable_reference_type()
{
var mock = new Mock<IFoo>() { DefaultValue = DefaultValue.Mock };
var task = (ValueTask<IndexOutOfRangeException>)GetDefaultValueForProperty(nameof(IFoo.ValueTaskOfUnmockableReferenceType), mock);
Assert.True(task.IsCompleted);
Assert.Null(task.Result);
}
[Fact]
public void Provides_completed_ValueTask_containing_mocked_value_for_ValueTask_of_mockable_type()
{
var mock = new Mock<IFoo>() { DefaultValue = DefaultValue.Mock };
var task = (ValueTask<IBar>)GetDefaultValueForProperty(nameof(IFoo.ValueTaskOfMockableType), mock);
Assert.True(task.IsCompleted);
Assert.NotNull(task.Result);
Assert.True(task.Result is IMocked);
}
[Fact]
public void Provides_completed_ValueTask_of_completed_Task_of_mocked_value_for_ValueTask_of_Task_of_mockable_type()
{
var mock = new Mock<IFoo>() { DefaultValue = DefaultValue.Mock };
var task = (ValueTask<Task<IBar>>)GetDefaultValueForProperty(nameof(IFoo.ValueTaskOfTaskOfMockableType), mock);
Assert.True(task.IsCompleted);
Assert.NotNull(task.Result);
Assert.True(task.Result.IsCompleted);
Assert.NotNull(task.Result.Result);
Assert.True(task.Result.Result is IMocked);
}
[Fact]
public void Provides_ValueTuple_of_empty_array_and_completed_task_of_mocked_type()
{
var mock = new Mock<IFoo>() { DefaultValue = DefaultValue.Mock };
var value = GetDefaultValueForProperty(nameof(IFoo.ValueTupleOfReferenceTypeArrayAndTaskOfReferenceType), mock);
var (bars, barTask) = ((IBar[], Task<IBar>))value;
Assert.NotNull(bars);
Assert.Empty(bars);
Assert.NotNull(barTask);
Assert.True(barTask.IsCompleted);
Assert.IsAssignableFrom<IBar>(barTask.Result);
Assert.True(barTask.Result is IMocked);
}
[Fact]
public async Task Mock_wrapped_in_completed_Task_gets_included_in_verification_of_outer_mock()
{
var mock = new Mock<IFoo>() { DefaultValue = DefaultValue.Mock };
var bar = await mock.Object.TaskOfMockableType;
var barMock = Mock.Get(bar);
barMock.Setup(b => b.Do()).Verifiable();
var ex = Assert.Throws<MockException>(() => mock.Verify());
Assert.True(ex.IsVerificationError);
}
[Fact]
public async Task Mock_wrapped_in_completed_ValueTask_gets_included_in_verification_of_outer_mock()
{
var mock = new Mock<IFoo>() { DefaultValue = DefaultValue.Mock };
var bar = await mock.Object.ValueTaskOfMockableType;
var barMock = Mock.Get(bar);
barMock.Setup(b => b.Do()).Verifiable();
var ex = Assert.Throws<MockException>(() => mock.Verify());
Assert.True(ex.IsVerificationError);
}
private static object GetDefaultValueForProperty(string propertyName, Mock<IFoo> mock)
{
var propertyGetter = typeof(IFoo).GetProperty(propertyName).GetGetMethod();
return DefaultValueProvider.Mock.GetDefaultReturnValue(propertyGetter, mock);
}
public interface IFoo
{
IBar Bar { get; set; }
string Value { get; set; }
IEnumerable<int> Indexes { get; set; }
IBar[] Bars { get; set; }
Task<int> TaskOfValueType { get; set; }
Task<int[]> TaskOfEmptyableType { get; set; }
Task<IndexOutOfRangeException> TaskOfUnmockableReferenceType { get; set; }
Task<IBar> TaskOfMockableType { get; set; }
Task<Task<int>> TaskOfTaskOfWhatever { get; set; }
ValueTask<int> ValueTaskOfValueType { get; set; }
ValueTask<int[]> ValueTaskOfEmptyableType { get; set; }
ValueTask<IndexOutOfRangeException> ValueTaskOfUnmockableReferenceType { get; set; }
ValueTask<IBar> ValueTaskOfMockableType { get; set; }
ValueTask<Task<IBar>> ValueTaskOfTaskOfMockableType { get; set; }
(IBar[], Task<IBar>) ValueTupleOfReferenceTypeArrayAndTaskOfReferenceType { get; }
}
public interface IBar { void Do(); }
}
}