Rearrange renderer unit tests

tests/test_renderer.py

@@ -26,32 +26,11 @@ def test_config():
     assert default.orientation == 'h'
 
 
-def test_renderer():
-    """
-    TODO check image output using:
-    https://matplotlib.org/devel/testing.html#writing-an-image-comparison-test
-
-    https://stackoverflow.com/a/27950953
-    "[I]mage comparison tests end up bring more trouble than they are worth"
-    """
-
-    # 2 columns
-    cfg = RendererConfig(WIDTH, HEIGHT)
-    lcfg = LayoutConfig(ncols=2)
-    nplots = 15
-
-    r = MatplotlibRenderer(cfg, lcfg, nplots)
-
-    # 2 columns, 8 rows
-    assert r.layout.ncols == 2
-    assert r.layout.nrows == 8
-
-
 @pytest.mark.parametrize('lcfg', [
     LayoutConfig(ncols=2),
     LayoutConfig(nrows=8),
 ])
-def test_layout(lcfg):
+def test_hlayout(lcfg):
     nplots = 15
     layout = RendererLayout(lcfg, nplots)
 
@@ -75,7 +54,7 @@ def test_layout(lcfg):
     LayoutConfig(ncols=3, orientation='v'),
     LayoutConfig(nrows=3, orientation='v'),
 ])
-def test_layout(lcfg):
+def test_vlayout(lcfg):
     nplots = 7
     layout = RendererLayout(lcfg, nplots)
 
@@ -90,5 +69,30 @@ def test_layout(lcfg):
     assert regions[3] == '(0, 1)'
     assert regions[6] == '(0, 2)'
 
+
+def test_renderer():
+    """
+    TODO check image output using:
+    https://matplotlib.org/devel/testing.html#writing-an-image-comparison-test
+
+    https://stackoverflow.com/a/27950953
+    "[I]mage comparison tests end up bring more trouble than they are worth"
+    """
+
+    # 2 columns
+    cfg = RendererConfig(WIDTH, HEIGHT)
+    lcfg = LayoutConfig(ncols=2)
+    nplots = 15
+
+    r = MatplotlibRenderer(cfg, lcfg, nplots)
+
+    # 2 columns, 8 rows
+    assert r.layout.ncols == 2
+    assert r.layout.nrows == 8
+
 # TODO: test get_frame()
-# (integration test) ensure rendering to output works
+def test_colors():
+    pass    # TODO
+
+
+# TODO (integration test) ensure rendering to output works