org.junit.platform.launcher

Class TestPlan

java.lang.Object

org.junit.platform.launcher.TestPlan

@API(value=Experimental)
public final class TestPlan
extends java.lang.Object

TestPlan describes the tree of tests and containers as discovered by a Launcher.

Tests and containers are represented by TestIdentifier instances. The complete set of identifiers comprises a tree-like structure. However, each identifier only stores the unique ID of its parent. This class provides a number of helpful methods to retrieve the parent, children, and descendants of an identifier.

While the contained instances of TestIdentifier are immutable, instances of this class contain mutable state. For example, when a dynamic test is registered at runtime, it is added to the original test plan and reported to TestExecutionListener implementations.

Since:

1.0

See Also:

Launcher, TestExecutionListener

Method Summary

Modifier and Type	Method and Description
void	add(TestIdentifier testIdentifier) Add the supplied TestIdentifier to this test plan.
long	countTestIdentifiers(java.util.function.Predicate<? super TestIdentifier> predicate) Count all TestIdentifiers that satisfy the given predicate.
static TestPlan	from(java.util.Collection<TestDescriptor> engineDescriptors) Construct a new TestPlan from the supplied collection of TestDescriptors.
java.util.Set<TestIdentifier>	getChildren(java.lang.String parentId) Get the children of the supplied unique ID.
java.util.Set<TestIdentifier>	getChildren(TestIdentifier parent) Get the children of the supplied TestIdentifier.
java.util.Set<TestIdentifier>	getDescendants(TestIdentifier parent) Get all descendants of the supplied TestIdentifier (i.e., all of its children and their children, recursively).
java.util.Optional<TestIdentifier>	getParent(TestIdentifier child) Get the parent of the supplied TestIdentifier.
java.util.Set<TestIdentifier>	getRoots() Get the root TestIdentifiers for this test plan.
TestIdentifier	getTestIdentifier(java.lang.String uniqueId) Get the TestIdentifier with the supplied unique ID.

Methods inherited from class java.lang.Object

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

Method Detail

from

@API(value=Internal)
public static TestPlan from(java.util.Collection<TestDescriptor> engineDescriptors)

Construct a new TestPlan from the supplied collection of TestDescriptors.

Each supplied TestDescriptor is expected to be a descriptor for a TestEngine.

Parameters:

engineDescriptors - the engine test descriptors from which the test plan should be created; never null

Returns:

a new test plan

add

public void add(TestIdentifier testIdentifier)

Add the supplied TestIdentifier to this test plan.

Parameters:

testIdentifier - the identifier to add; never null

getRoots

public java.util.Set<TestIdentifier> getRoots()

Get the root TestIdentifiers for this test plan.

Returns:

an unmodifiable set of the root identifiers

getParent

public java.util.Optional<TestIdentifier> getParent(TestIdentifier child)

Get the parent of the supplied TestIdentifier.

Parameters:

child - the identifier to look up the parent for; never null

Returns:

an Optional containing the parent, if present

getChildren

public java.util.Set<TestIdentifier> getChildren(TestIdentifier parent)

Get the children of the supplied TestIdentifier.

Parameters:

parent - the identifier to look up the children for; never null

Returns:

an unmodifiable set of the parent's children, potentially empty

See Also:

getChildren(String)

getChildren

public java.util.Set<TestIdentifier> getChildren(java.lang.String parentId)

Get the children of the supplied unique ID.

Parameters:

parentId - the unique ID to look up the children for; never null or blank

Returns:

an unmodifiable set of the parent's children, potentially empty

See Also:

getChildren(TestIdentifier)

getTestIdentifier

public TestIdentifier getTestIdentifier(java.lang.String uniqueId)
                                 throws PreconditionViolationException

Get the TestIdentifier with the supplied unique ID.

Parameters:

uniqueId - the unique ID to look up the identifier for; never null or blank

Returns:

the identifier with the supplied unique ID; never null

Throws:

PreconditionViolationException - if no TestIdentifier with the supplied unique ID is present in this test plan

countTestIdentifiers

public long countTestIdentifiers(java.util.function.Predicate<? super TestIdentifier> predicate)

Count all TestIdentifiers that satisfy the given predicate.

Parameters:

predicate - a predicate which returns true for identifiers to be counted; never null

Returns:

the number of identifiers that satisfy the supplied predicate

getDescendants

public java.util.Set<TestIdentifier> getDescendants(TestIdentifier parent)

Get all descendants of the supplied TestIdentifier (i.e., all of its children and their children, recursively).

Parameters:

parent - the identifier to look up the descendants for; never null

Returns:

an unmodifiable set of the parent's descendants, potentially empty