fix junit5-runner ForkSubtests: should distribute evenly tests in chunks

commit_hash:478736ce9fbf76b0b269d4ac39055a3989b92e7f

Author: almishev

build/plugins/_dart_fields.py

@@ -1343,6 +1343,14 @@ def value(cls, unit, flat_args, spec_args):
         return {cls.KEY: unit.get("TEST_PARTITION")}
 
 
+class TestExperimentalFork:
+    KEY = 'TEST_EXPERIMENTAL_FORK'
+
+    @classmethod
+    def value(cls, unit, flat_args, spec_args):
+        return {cls.KEY: unit.get("TEST_EXPERIMENTAL_FORK")}
+
+
 class TestRecipes:
     KEY = 'TEST-RECIPES'
 

build/plugins/ytest.py

@@ -876,6 +876,7 @@ def onadd_pytest_bin(fields, unit, *args):
         df.TestEnv.value,
         df.TestData.java_test,
         df.ForkMode.test_fork_mode,
+        df.TestExperimentalFork.value,
         df.SplitFactor.from_unit,
         df.CustomDependencies.test_depends_only,
         df.Tag.from_macro_args_and_unit,

build/ymake.core.conf

@@ -2762,6 +2762,18 @@ macro FORK_TEST_FILES() {
     SET(FORK_TEST_FILES_MODE on)
 }
 
+# tag:test
+TEST_EXPERIMENTAL_FORK=
+### @usage: EXPERIMENTAL_FORK()
+###
+### Only for java-tests: same as FORK_(SUB)TESTS(SEQUENTIAL) for other languages
+### Compatible with FORK_(SUB)TESTS.
+###
+### Documentation about the system test: https://wiki.yandex-team.ru/yatool/test/
+macro EXPERIMENTAL_FORK() {
+    SET(TEST_EXPERIMENTAL_FORK yes)
+}
+
 # tag:test
 TEST_SIZE_NAME=SMALL
 ### @usage: SIZE(SMALL/MEDIUM/LARGE)