moq

Basic Mock Setup

```csharp

public class WalletManagerTests

{

private readonly Mock _mockCryptoModule;

private readonly Mock _mockHashProvider;

public WalletManagerTests()

{

_mockCryptoModule = new Mock();

_mockHashProvider = new Mock();

}

}

```

Async Method Mock

```csharp

_mockCryptoModule

.Setup(x => x.GenerateKeySetAsync(

It.IsAny(),

It.IsAny(),

It.IsAny()))

.ReturnsAsync(CryptoResult.Success(keySet));

```

Verification

```csharp

_mockRegisterManager.Verify(

m => m.CreateRegisterAsync("Test Register", "tenant-123", false, true, It.IsAny()),

Times.Once);

```

| Concept | Usage | Example |

|---------|-------|---------|

| Mock | Create mock instance | new Mock() |

| .Object | Get mock instance | _mock.Object |

| Mock.Of() | Quick mock for simple deps | Mock.Of>() |

| Setup() | Configure behavior | .Setup(x => x.Method()) |

| ReturnsAsync() | Async return value | .ReturnsAsync(result) |

| Callback() | Capture arguments | .Callback((arg) => captured = arg) |

| Verify() | Assert method called | .Verify(x => x.Method(), Times.Once) |

| It.IsAny() | Match any argument | It.IsAny() |

| It.Is() | Match with predicate | It.Is(x => x.Id == 1) |

Logger Mock (Quick)

When: You need a logger but don't care about verifying logs.

```csharp

var service = new WalletManager(Mock.Of>());

```

Options Pattern Mock

When: Injecting IOptions dependencies.

```csharp

var mockConfig = new Mock>();

mockConfig.Setup(x => x.Value).Returns(new PeerServiceConfiguration { Enabled = true });

```

• [patterns](references/patterns.md) - Detailed setup and verification patterns
• [workflows](references/workflows.md) - Test writing workflows and integration testing

• See the xunit skill for test framework patterns
• See the fluent-assertions skill for assertion syntax
• See the entity-framework skill for mocking DbContext

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Library ID: /devlooped/moq

Recommended Queries:

• "moq setup verify async methods"
• "moq callbacks parameter capture"
• "moq argument matching It.Is"