org.junit.platform.engine.discovery

Class DiscoverySelectors

java.lang.Object

org.junit.platform.engine.discovery.DiscoverySelectors

@API(status=STABLE,
     since="1.0")
public final class DiscoverySelectors
extends Object

Collection of static factory methods for creating DiscoverySelectors.

Since:

1.0

See Also:

ClasspathRootSelector, ClasspathResourceSelector, ClassSelector, MethodSelector, PackageSelector

Method Summary

Modifier and Type	Method and Description
static ClassSelector	selectClass(Class<?> clazz) Create a ClassSelector for the supplied Class.
static ClassSelector	selectClass(String className) Create a ClassSelector for the supplied class name.
static ClasspathResourceSelector	selectClasspathResource(String classpathResourceName) Create a ClasspathResourceSelector for the supplied classpath resource name.
static List<ClasspathRootSelector>	selectClasspathRoots(Set<Path> classpathRoots) Create a list of ClasspathRootSelectors for the supplied classpath roots (directories or JAR files).
static DirectorySelector	selectDirectory(File directory) Create a DirectorySelector for the supplied directory.
static DirectorySelector	selectDirectory(String path) Create a DirectorySelector for the supplied directory path.
static FileSelector	selectFile(File file) Create a FileSelector for the supplied file.
static FileSelector	selectFile(String path) Create a FileSelector for the supplied file path.
static MethodSelector	selectMethod(Class<?> javaClass, Method method) Create a MethodSelector for the supplied Class and Method.
static MethodSelector	selectMethod(Class<?> javaClass, String methodName) Create a MethodSelector for the supplied Class and method name.
static MethodSelector	selectMethod(Class<?> javaClass, String methodName, String methodParameterTypes) Create a MethodSelector for the supplied Class, method name, and method parameter types.
static MethodSelector	selectMethod(String fullyQualifiedMethodName) Create a MethodSelector for the supplied fully qualified method name.
static MethodSelector	selectMethod(String className, String methodName) Create a MethodSelector for the supplied class name and method name.
static MethodSelector	selectMethod(String className, String methodName, String methodParameterTypes) Create a MethodSelector for the supplied class name, method name, and method parameter types.
static PackageSelector	selectPackage(String packageName) Create a PackageSelector for the supplied package name.
static UniqueIdSelector	selectUniqueId(String uniqueId) Create a UniqueIdSelector for the supplied unique ID.
static UniqueIdSelector	selectUniqueId(UniqueId uniqueId) Create a UniqueIdSelector for the supplied UniqueId.
static UriSelector	selectUri(String uri) Create a UriSelector for the supplied URI.
static UriSelector	selectUri(URI uri) Create a UriSelector for the supplied URI.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

selectUri

public static UriSelector selectUri(String uri)

Create a UriSelector for the supplied URI.

Parameters:

uri - the URI to select; never null or blank

See Also:

UriSelector, selectUri(URI), selectFile(String), selectFile(File), selectDirectory(String), selectDirectory(File)

selectUri

public static UriSelector selectUri(URI uri)

Create a UriSelector for the supplied URI.

Parameters:

uri - the URI to select; never null

See Also:

UriSelector, selectUri(String), selectFile(String), selectFile(File), selectDirectory(String), selectDirectory(File)

selectFile

public static FileSelector selectFile(String path)

Create a FileSelector for the supplied file path.

This method selects the file using the supplied path as is, without verifying if the file exists.

Parameters:

path - the path to the file to select; never null or blank

See Also:

FileSelector, selectFile(File), selectDirectory(String), selectDirectory(File)

selectFile

public static FileSelector selectFile(File file)

Create a FileSelector for the supplied file.

This method selects the file in its canonical form and throws a PreconditionViolationException if the file does not exist.

Parameters:

file - the file to select; never null

See Also:

FileSelector, selectFile(String), selectDirectory(String), selectDirectory(File)

selectDirectory

public static DirectorySelector selectDirectory(String path)

Create a DirectorySelector for the supplied directory path.

This method selects the directory using the supplied path as is, without verifying if the directory exists.

Parameters:

path - the path to the directory to select; never null or blank

See Also:

DirectorySelector, selectDirectory(File), selectFile(String), selectFile(File)

selectDirectory

public static DirectorySelector selectDirectory(File directory)

Create a DirectorySelector for the supplied directory.

This method selects the directory in its canonical form and throws a PreconditionViolationException if the directory does not exist.

Parameters:

directory - the directory to select; never null

See Also:

DirectorySelector, selectDirectory(String), selectFile(String), selectFile(File)

selectClasspathRoots

public static List<ClasspathRootSelector> selectClasspathRoots(Set<Path> classpathRoots)

Create a list of ClasspathRootSelectors for the supplied classpath roots (directories or JAR files).

Since the supplied paths are converted to URIs, the FileSystem that created them must be the default or one that has been created by an installed FileSystemProvider.

Since engines are not expected to modify the classpath, the classpath roots represented by the resulting selectors must be on the classpath of the context class loader of the thread that uses these selectors.

Parameters:

classpathRoots - set of directories and JAR files in the filesystem that represent classpath roots; never null

Returns:

a list of selectors for the supplied classpath roots; elements which do not physically exist in the filesystem will be filtered out

See Also:

ClasspathRootSelector, Thread.getContextClassLoader()

selectClasspathResource

public static ClasspathResourceSelector selectClasspathResource(String classpathResourceName)

Create a ClasspathResourceSelector for the supplied classpath resource name.

The name of a classpath resource must follow the semantics for resource paths as defined in ClassLoader.getResource(String).

If the supplied classpath resource name is prefixed with a slash (/), the slash will be removed.

Since engines are not expected to modify the classpath, the supplied classpath resource must be on the classpath of the context class loader of the thread that uses the resulting selector.

Parameters:

classpathResourceName - the name of the classpath resource; never null or blank

See Also:

ClasspathResourceSelector, ClassLoader.getResource(String), ClassLoader.getResourceAsStream(String), ClassLoader.getResources(String)

selectPackage

public static PackageSelector selectPackage(String packageName)

Create a PackageSelector for the supplied package name.

The default package is represented by an empty string ("").

Parameters:

packageName - the package name to select; never null and never containing whitespace only

See Also:

PackageSelector

selectClass

public static ClassSelector selectClass(Class<?> clazz)

Create a ClassSelector for the supplied Class.

Parameters:

clazz - the class to select; never null

See Also:

ClassSelector

selectClass

public static ClassSelector selectClass(String className)

Create a ClassSelector for the supplied class name.

Parameters:

className - the fully qualified name of the class to select; never null or blank

See Also:

ClassSelector

selectMethod

public static MethodSelector selectMethod(String fullyQualifiedMethodName)
                                   throws PreconditionViolationException

Create a MethodSelector for the supplied fully qualified method name.

The following formats are supported.

• [fully qualified class name]#[methodName]
• [fully qualified class name]#[methodName](parameter type list)

The parameter type list is a comma-separated list of primitive names or fully qualified class names for the types of parameters accepted by the method.

Array parameter types may be specified using either the JVM's internal String representation (e.g., [[I for int[][], [Ljava.lang.String; for java.lang.String[], etc.) or source code syntax (e.g., int[][], java.lang.String[], etc.).

Examples

Method	Fully Qualified Method Name
java.lang.String.chars()	java.lang.String#chars
java.lang.String.chars()	java.lang.String#chars()
java.lang.String.equalsIgnoreCase(String)	java.lang.String#equalsIgnoreCase(java.lang.String)
java.lang.String.substring(int, int)	java.lang.String#substring(int, int)
example.Calc.avg(int[])	example.Calc#avg([I)
example.Calc.avg(int[])	example.Calc#avg(int[])
example.Matrix.multiply(double[][])	example.Matrix#multiply([[D)
example.Matrix.multiply(double[][])	example.Matrix#multiply(double[][])
example.Service.process(String[])	example.Service#process([Ljava.lang.String;)
example.Service.process(String[])	example.Service#process(java.lang.String[])
example.Service.process(String[][])	example.Service#process([[Ljava.lang.String;)
example.Service.process(String[][])	example.Service#process(java.lang.String[][])

Parameters:

fullyQualifiedMethodName - the fully qualified name of the method to select; never null or blank

Throws:

PreconditionViolationException

See Also:

MethodSelector

selectMethod

public static MethodSelector selectMethod(String className,
                                          String methodName)

Create a MethodSelector for the supplied class name and method name.

Parameters:

className - the fully qualified name of the class in which the method is declared, or a subclass thereof; never null or blank

methodName - the name of the method to select; never null or blank

See Also:

MethodSelector

selectMethod

public static MethodSelector selectMethod(String className,
                                          String methodName,
                                          String methodParameterTypes)

Create a MethodSelector for the supplied class name, method name, and method parameter types.

The parameter types String is typically a comma-separated list of atomic types, fully qualified class names, or array types; however, the exact syntax depends on the underlying test engine.

Parameters:

className - the fully qualified name of the class in which the method is declared, or a subclass thereof; never null or blank

methodName - the name of the method to select; never null or blank

methodParameterTypes - the method parameter types as a single string; never null though potentially an empty string if the method does not accept arguments

See Also:

MethodSelector

selectMethod

public static MethodSelector selectMethod(Class<?> javaClass,
                                          String methodName)

Create a MethodSelector for the supplied Class and method name.

Parameters:

javaClass - the class in which the method is declared, or a subclass thereof; never null

methodName - the name of the method to select; never null or blank

See Also:

MethodSelector

selectMethod

public static MethodSelector selectMethod(Class<?> javaClass,
                                          String methodName,
                                          String methodParameterTypes)

Create a MethodSelector for the supplied Class, method name, and method parameter types.

The parameter types String is typically a comma-separated list of atomic types, fully qualified class names, or array types; however, the exact syntax depends on the underlying test engine.

Parameters:

javaClass - the class in which the method is declared, or a subclass thereof; never null

methodName - the name of the method to select; never null or blank

methodParameterTypes - the method parameter types as a single string; never null though potentially an empty string if the method does not accept arguments

See Also:

MethodSelector

selectMethod

public static MethodSelector selectMethod(Class<?> javaClass,
                                          Method method)

Create a MethodSelector for the supplied Class and Method.

Parameters:

javaClass - the class in which the method is declared, or a subclass thereof; never null

method - the method to select; never null

See Also:

MethodSelector

selectUniqueId

public static UniqueIdSelector selectUniqueId(UniqueId uniqueId)

Create a UniqueIdSelector for the supplied UniqueId.

Parameters:

uniqueId - the UniqueId to select; never null

See Also:

UniqueIdSelector

selectUniqueId

public static UniqueIdSelector selectUniqueId(String uniqueId)

Create a UniqueIdSelector for the supplied unique ID.

Parameters:

uniqueId - the unique ID to select; never null or blank

See Also:

UniqueIdSelector