rjmurillo/moq.analyzers

# Moq1400: Explicitly choose a mocking behavior instead of relying on the default (Loose) behavior

| Item     | Value   |
| -------- | ------- |
| Enabled  | True    |
| Severity | Warning |
| CodeFix  | False   |
---

Mocks use the `MockBehavior.Loose` by default. Some people find this default behavior undesirable, as it can lead to
unexpected behavior if the mock is improperly set up. To fix, specify either `MockBehavior.Loose` or
`MockBehavior.Strict` to signify acknowledgement of the mock's behavior.

## Examples of patterns that are flagged by this analyzer

```csharp
interface ISample
{
    int Calculate() => 0;
}

var mock = new Mock<ISample>(); // Moq1400: Moq: Explicitly choose a mock behavior
var mock2 = Mock.Of<ISample>();  // Moq1400: Moq: Explicitly choose a mock behavior
```

```csharp
interface ISample
{
    int Calculate() => 0;
}

var mock = new Mock<ISample>(MockBehavior.Default); // Moq1400: Moq: Explicitly choose a mock behavior
var mock2 = Mock.Of<ISample>(MockBehavior.Default); // Moq1400: Moq: Explicitly choose a mock behavior
var repo = new MockRepository(MockBehavior.Default); // Moq1400: Moq: Explicitly choose a mock behavior
```

## Solution

```csharp
interface ISample
{
    int Calculate() => 0;
}

var mock = new Mock<ISample>(MockBehavior.Strict); // Or `MockBehavior.Loose`
var mock2 = new Mock.Of<ISample>(MockBehavior.Strict); // Or `MockBehavior.Loose`
var repo = new MockRepository(MockBehavior.Strict); // Or `MockBehavior.Loose`
```

## Suppress a warning

If you just want to suppress a single violation, add preprocessor directives to
your source file to disable and then re-enable the rule.

```csharp
#pragma warning disable Moq1400
var mock = new Mock<ISample>(); // Moq1400: Moq: Explicitly choose a mock behavior
#pragma warning restore Moq1400
```

To disable the rule for a file, folder, or project, set its severity to `none`
in the
[configuration file](https://learn.microsoft.com/en-us/dotnet/fundamentals/code-analysis/configuration-files).

```ini
[*.{cs,vb}]
dotnet_diagnostic.Moq1400.severity = none
```

For more information, see
[How to suppress code analysis warnings](https://learn.microsoft.com/en-us/dotnet/fundamentals/code-analysis/suppress-warnings).