MSTEST0018: DynamicData should be valid

Property	Value
Rule ID	MSTEST0018
Title	DynamicData should be valid
Category	Usage
Fix is breaking or non-breaking	Non-breaking
Enabled by default	Yes
Default severity	Warning
Introduced in version	3.6.0

Cause

A method marked with [DynamicData] should have valid layout.

Rule description

Methods marked with [DynamicData] should also be marked with [TestMethod] (or a derived attribute).

The "data source" member referenced:

• should exist on the specified type (current class if no type is specified)
• should not have overloads
• should be of the same kind (method or property) as the DataSourceType property
• should be static
• should not be generic
• should be parameterless
• should return IEnumerable<object[]>, IEnumerable<Tuple<T,...>>, or IEnumerable<ValueTuple<,...>>

The "display name" member referenced:

• should exist on the specified type (current class if no type is specified)
• should not have overloads
• should be a method
• should be static
• should not be generic
• should return string
• should take exactly 2 parameters, the first being MethodInfo and the second being object[]

Example:

public static string GetDisplayName(MethodInfo methodInfo, object[] data)
{
    return string.Format("{0} ({1})", methodInfo.Name, string.Join(",", data));
}

How to fix violations

Ensure that the attribute matches the conditions described above.

When to suppress warnings

Do not suppress a warning from this rule. If you ignore this rule, flagged instances will be either skipped or result in runtime error.

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.

#pragma warning disable MSTEST0018
// The code that's violating the rule is on this line.
#pragma warning restore MSTEST0018

To disable the rule for a file, folder, or project, set its severity to none in the configuration file.

[*.{cs,vb}]
dotnet_diagnostic.MSTEST0018.severity = none

For more information, see How to suppress code analysis warnings.