support --backend as a pytest flag to limit to one backend for testing
diff --git a/tests/test_utils.py b/tests/test_utils.py
index e3e53d6..e8037c1 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -21,7 +21,7 @@
from .utils import (
load_nist_vectors, load_vectors_from_file, load_cryptrec_vectors,
load_openssl_vectors, load_hash_vectors, check_for_iface,
- check_backend_support
+ check_backend_support, modify_backend_list
)
@@ -29,6 +29,27 @@
pass
+def test_modify_backend_list_leave_one():
+ b1 = pretend.stub(name="b1")
+ b2 = pretend.stub(name="b2")
+ b3 = pretend.stub(name="b3")
+ backends = [b1, b2, b3]
+ name = "b2"
+ modify_backend_list(name, backends)
+ assert len(backends) == 1
+ assert backends[0] == b2
+
+
+def test_modify_backend_list_error_none():
+ b1 = pretend.stub(name="b1")
+ b2 = pretend.stub(name="b2")
+ b3 = pretend.stub(name="b3")
+ backends = [b1, b2, b3]
+ name = "back!"
+ with pytest.raises(ValueError):
+ modify_backend_list(name, backends)
+
+
def test_check_for_iface():
item = pretend.stub(keywords=["fake_name"], funcargs={"backend": True})
with pytest.raises(pytest.skip.Exception) as exc_info: