Document URI TestSource support of dynamic tests

Document URI TestSource support of dynamic tests in User Guide

Author: ielatif

documentation/src/docs/asciidoc/user-guide/writing-tests.adoc

@@ -1575,6 +1575,25 @@ The last method generates a nested hierarchy of dynamic tests utilizing
 include::{testDir}/example/DynamicTestsDemo.java[tags=user_guide]
 ----
 
+[[writing-tests-uris-test-source-examples]]
+===== URI Test Source Examples
+
+The JUnit Platform provides `TestSource`, a representation of the source of a test
+or container used to navigate to its location by IDEs and build tools.
+
+Test sources can be constructed using URIs :
+
+- `ClasspathResourceSource`
+Use the `classpath` scheme, for example: `classpath:/test/foo.xml?line=20,column=2`
+
+- `DirectorySource` and `FileSource`
+Use file system paths.
+
+- `MethodSource`
+Use the `method` scheme and the fully-qualified-method-name ex
+`method:org.junit.Foo#bar(java.lang.String, java.lang.String[])`. Please refer to the Javadoc for
+`DiscoverySelectors.selectMethod(String)` for the supported formats for a FQMN.
+
 
 [[writing-tests-declarative-timeouts]]
 === Timeouts