1 files changed, 63 insertions, 0 deletions
diff --git a/tests/test_config.py b/tests/test_config.py
new file mode 100644
index 0000000..c67929d
--- /dev/null
+++ b/tests/test_config.py
@@ -0,0 +1,63 @@
+import os
+import re
+
+import pytest
+
+from nikola import __main__ as nikola
+
+
+def test_simple_config(simple_config, metadata_option):
+    """Check whether configuration-files without ineritance are interpreted correctly."""
+    assert simple_config[metadata_option]["ID"] == "conf"
+
+
+def test_inherited_config(simple_config, metadata_option, complex_config):
+    """Check whether configuration-files with ineritance are interpreted correctly."""
+    check_base_equality(simple_config, metadata_option, complex_config)
+    assert complex_config[metadata_option]["ID"] == "prod"
+
+
+def test_config_with_illegal_filename(
+    simple_config, metadata_option, complex_filename_config
+):
+    """Check whether files with illegal module-name characters can be set as config-files, too."""
+    check_base_equality(simple_config, metadata_option, complex_filename_config)
+    assert complex_filename_config[metadata_option]["ID"] == "illegal"
+
+
+@pytest.fixture(scope="module")
+def simple_config(data_dir):
+    nikola.main(["--conf=" + os.path.join(data_dir, "conf.py")])
+    return nikola.config
+
+
+@pytest.fixture(scope="module")
+def data_dir(test_dir):
+    return os.path.join(test_dir, "data", "test_config")
+
+
+@pytest.fixture
+def metadata_option():
+    return "ADDITIONAL_METADATA"
+
+
+@pytest.fixture(scope="module")
+def complex_config(data_dir):
+    nikola.main(["--conf=" + os.path.join(data_dir, "prod.py")])
+    return nikola.config
+
+
+@pytest.fixture(scope="module")
+def complex_filename_config(data_dir):
+    config_path = os.path.join(
+        data_dir, "config.with+illegal(module)name.characters.py"
+    )
+    nikola.main(["--conf=" + config_path])
+    return nikola.config
+
+
+def check_base_equality(base_config, metadata_option, config):
+    """Check whether the specified `config` equals the base config."""
+    for option in base_config.keys():
+        if re.match("^[A-Z]+(_[A-Z]+)*$", option) and option != metadata_option:
+            assert base_config[option] == config[option]