TEST: test config file templating, and attribute assignment restriction

bip/tests/test_bip_utils_config.py

@@ -189,6 +189,39 @@ def test_Config_load_config_file():
                     assert result[k] == v
 
 
+def test_Config_load_config_file_jinja2_vars():
+
+    configtoml = tw.dedent("""
+    param1 = 1
+    param2 = {{VAR0}}
+    [abc]
+    param3 = {{VAR1}}
+    param4 = 4
+    [def]
+    param5   = 5
+    {{VAR2}} = 6
+    """).strip()
+
+    env = {
+        'VAR0' : '2',
+        'VAR1' : '3',
+        'VAR2' : 'param6',
+    }
+
+    exp = {
+        'param1'     : '1',
+        'param2'     : '2',
+        'abc_param3' : '3',
+        'abc_param4' : '4',
+        'def_param5' : '5',
+        'def_param6' : '6',
+    }
+
+    with tempdir():
+        open('config.toml', 'wt').write(configtoml)
+        cfg = config.Config.load_config_file('config.toml', env=env)
+
+
 def test_Config_load_config_file_main_relabelling():
     configtoml = tw.dedent("""
     param1 = 1
@@ -349,28 +382,34 @@ def test_Config_access():
 
         cfg = config.Config('.')
 
-        assert cfg.cfgdir == td
-        assert len(cfg) == len(exp)
+    assert cfg.cfgdir == td
+    assert len(cfg) == len(exp)
 
-        assert sorted(cfg.keys())  == sorted(exp.keys())
-        assert sorted(cfg.items()) == sorted(exp.items())
+    assert sorted(cfg.keys())  == sorted(exp.keys())
+    assert sorted(cfg.items()) == sorted(exp.items())
 
-        # Order of exp is intentional, to
-        # match config construction order.
-        assert [v1 == v2 for v1, v2 in zip(cfg.values(), exp.values())]
+    # Order of exp is intentional, to
+    # match config construction order.
+    assert [v1 == v2 for v1, v2 in zip(cfg.values(), exp.values())]
 
-        for k, v in exp.items():
-            assert k in cfg
-            assert cfg[k]          == v
-            assert getattr(cfg, k) == v
-            assert cfg.get(k)      == v
+    for k, v in exp.items():
+        assert k in cfg
+        assert cfg[k]          == v
+        assert getattr(cfg, k) == v
+        assert cfg.get(k)      == v
+
+    assert cfg.getall(param1=0, param2=1, param4=3) == \
+        {'param1' : 1, 'param2' : 'abc', 'param4' : 3}
 
-        assert cfg.getall(param1=0, param2=1, param4=3) == \
-            {'param1' : 1, 'param2' : 'abc', 'param4' : 3}
+    assert cfg.gettuple(param1=0, param2=1, param4=3) == (1, 'abc', 3)
 
-        assert cfg.gettuple(param1=0, param2=1, param4=3) == (1, 'abc', 3)
+    assert cfg.getall('abc', param1=0, param2=1, param3=3) == \
+        {'param1' : True, 'param2' : 0.4, 'param3' : 3}
+    assert cfg.gettuple('abc', param1=0, param2=1, param4=3) == \
+        (True, 0.4, 3)
 
-        assert cfg.getall('abc', param1=0, param2=1, param3=3) == \
-            {'param1' : True, 'param2' : 0.4, 'param3' : 3}
-        assert cfg.gettuple('abc', param1=0, param2=1, param4=3) == \
-            (True, 0.4, 3)
+    # Can add new attributes as normal
+    cfg.new_param = 12345
+    # But cannot override old attributes
+    with pytest.raises(config.ConfigError):
+        cfg.param1 = 6