1 files changed, 55 insertions, 0 deletions
diff --git a/tests/test_topology.py b/tests/test_topology.py
new file mode 100644
index 0000000..0579d63
--- /dev/null
+++ b/tests/test_topology.py
@@ -0,0 +1,55 @@
+"""Module for testing topology behaviour."""
+
+import pytest
+
+from blc2.topology import Fixture
+from blc2.workspace import Workspace
+
+def test_fixture_create(ws):
+    """Test basic fixture creation."""
+    f = Fixture(ws, id_=0, name="Test 1")
+    assert f.id in ws.fixtures
+    assert f.id == 0
+    assert f.name == "Test 1"
+    assert not f.channels
+
+    with pytest.raises(ValueError):
+        Fixture(ws, id_=0, name="Test 2")
+
+    assert ws.fixtures[0] == f
+    assert len(ws.fixtures) == 1
+
+    f2 = Fixture(ws, name="Test 3")
+    assert f2.id is not None
+    assert ws.fixtures[f2.id] == f2
+    assert len(ws.fixtures) == 2
+
+    f3 = Fixture(ws, channel_count = 3)
+    assert len(f3.channels) == 3
+
+def test_fixture_channels(ws):
+    """Test fixture channel manipulations."""
+    f = Fixture(ws, channel_count=3)
+    for i in range(3):
+        f.channels[i].address = (0, i)
+    channels = tuple(f.channels)
+
+    with pytest.raises(ValueError):
+        f.channel_count = -1
+    assert len(f.channels) == 3
+
+    ## Verify that the channels haven't been changed
+    for a, b in zip(f.channels, channels):
+        assert id(a) == id(b)
+    
+    f.channel_count = 2
+    assert len(f.channels) == 2
+    for a, b in zip(f.channels, channels[:2]):
+        assert id(a) == id(b)
+    
+    f.channel_count = 3
+    assert len(f.channels) == 3
+    for a, b in zip(f.channels, channels[:2]):
+        assert id(a) == id(b)
+
+    assert id(f.channels[2]) != id(channels[2])