Add macro junit_tests

Macro junit_tests compiles and runs JUnit 5 tests.

README.md

@@ -4,6 +4,7 @@ Rules:
 
 - [executable_jar](docs/executable_jar.md)
 - [javadoc](docs/javadoc.md)
+- [junit_tests](docs/junit_tests.md) (macro)
 
 ## Usage
 
@@ -14,6 +15,6 @@ http_archive(
     name = "extra_rules_java",
     sha256 = <sha>,
     strip_prefix = "extra_rules_java-{}".format(<tag>),
-    url = "https://github.com/joca-bt/extra_rules_java/archive/{}.tar.gz".format(<tag>),
+    url = "https://github.com/joca-bt/extra_rules_java/releases/download/{0}/extra_rules_java-{0}.tar.gz".format(<tag>),
 )
 ```

docs/junit_tests.md

@@ -0,0 +1,9 @@
+# junit_tests
+
+```bazel
+junit_tests(name, **kwargs)
+```
+
+Compiles and runs JUnit 5 tests.
+
+The arguments are the same as for [`java_test`](https://bazel.build/reference/be/java#java_test).

java/defs.bzl

@@ -1,5 +1,7 @@
 load("//java/private:executable_jar.bzl", _executable_jar = "executable_jar")
 load("//java/private:javadoc.bzl", _javadoc = "javadoc")
+load("//java/private:junit_tests.bzl", _junit_tests = "junit_tests")
 
 executable_jar = _executable_jar
 javadoc = _javadoc
+junit_tests = _junit_tests

java/private/junit_tests.bzl

@@ -0,0 +1,28 @@
+_FORBIDDEN_ARGUMENTS = [
+    "args",
+    "main_class",
+    "use_testrunner",
+]
+
+def junit_tests(name, **kwargs):
+    for argument in _FORBIDDEN_ARGUMENTS:
+        if argument in kwargs:
+            fail("Forbidden argument: {}.".format(argument))
+
+    if native.package_name():
+        jar = "{}/{}.jar".format(native.package_name(), name)
+    else:
+        jar = "{}.jar".format(name)
+
+    native.java_test(
+        name = name,
+        main_class = "extrarulesjava.testrunner.TestRunner",
+        use_testrunner = False,
+        runtime_deps = kwargs.pop("runtime_deps", []) + [
+            "@extra_rules_java//test-runner",
+        ],
+        args = [
+            jar,
+        ],
+        **kwargs,
+    )