Package org.junit.jupiter.api

Interface DisplayNameGenerator

All Known Implementing Classes:

DisplayNameGenerator.ReplaceUnderscores, DisplayNameGenerator.Standard

@API(status=EXPERIMENTAL,
     since="5.4")
public interface DisplayNameGenerator

DisplayNameGenerator defines the SPI for generating display names programmatically.

Display names are typically used for test reporting in IDEs and build tools and may contain spaces, special characters, and even emoji.

Concrete implementations must have a default constructor.

Since:

5.4

See Also:

@DisplayName, @DisplayNameGeneration

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static class	DisplayNameGenerator.ReplaceUnderscores	DisplayNameGenerator that replaces underscores with spaces.
static class	DisplayNameGenerator.Standard	Standard DisplayNameGenerator.

Method Summary

Modifier and Type	Method	Description
String	generateDisplayNameForClass(Class<?> testClass)	Generate a display name for the given top-level or static nested test class.
String	generateDisplayNameForMethod(Class<?> testClass, Method testMethod)	Generate a display name for the given method.
String	generateDisplayNameForNestedClass(Class<?> nestedClass)	Generate a display name for the given @Nested inner test class.
static String	parameterTypesAsString(Method method)	Generate a string representation of the formal parameters of the supplied method, consisting of the simple names of the parameter types, separated by commas, and enclosed in parentheses.

Method Detail

generateDisplayNameForClass

String generateDisplayNameForClass(Class<?> testClass)

Generate a display name for the given top-level or static nested test class.

Parameters:

testClass - the class to generate a name for; never null

Returns:

the display name for the class; never null or blank

generateDisplayNameForNestedClass

String generateDisplayNameForNestedClass(Class<?> nestedClass)

Generate a display name for the given @Nested inner test class.

Parameters:

nestedClass - the class to generate a name for; never null

Returns:

the display name for the nested class; never null or blank

generateDisplayNameForMethod

String generateDisplayNameForMethod(Class<?> testClass,
                                    Method testMethod)

Generate a display name for the given method.

Parameters:

testClass - the class the test method is invoked on; never null

testMethod - method to generate a display name for; never null

Returns:

the display name for the test; never null or blank

Implementation Note:

The class instance supplied as testClass may differ from the class returned by testMethod.getDeclaringClass() — for example, when a test method is inherited from a superclass.

parameterTypesAsString

static String parameterTypesAsString(Method method)

Generate a string representation of the formal parameters of the supplied method, consisting of the simple names of the parameter types, separated by commas, and enclosed in parentheses.

Parameters:

method - the method from to extract the parameter types from; never null

Returns:

a string representation of all parameter types of the supplied method or "()" if the method declares no parameters