Add test_highest_version_selection.py, example.test.env.yaml and expand utils.py

tests/integration/test_highest_version_selection.py

@@ -0,0 +1,24 @@
+# -*- coding: utf-8 -*-
+# SPDX-License-Identifier: MIT
+
+
+def test_highest_version_selection(pkg_util, scenario, repo, mbs, require_koji_resolver):
+    """
+    Build module with stream with multiple versions in buildrequires.
+
+    Checks:
+    * Check that the highest version of build in required stream is used.
+    """
+    repo.bump()
+    builds = pkg_util.run("--optional", "rebuild_strategy=all",
+                          reuse=scenario.get("build_id"))
+    build = builds[0]
+    module_id = build.module_build_data['id']
+    build_info = mbs.get_module_build(module_id)
+    module_version_used = build_info.data['buildrequires']['testmodule']['version']
+    module_builds = mbs.get_builds(scenario['stream_module'], scenario['test_stream'])
+    module_versions = [build.data['version'] for build
+                       in module_builds]
+    assert len(module_versions) >= 2, 'More than one version is needed.'
+    error_msg = 'Version used is not the latest.'
+    assert module_version_used == max(module_versions), error_msg