Adding tests for LabelGrid, re-organization of tests into a directory

.travis.yml

@@ -17,4 +17,5 @@ install:
 
 script:
   - "flake8 tk_tools"
-  - "py.test test.py"
+  - "py.test tests/test_basic.py"
+  - "py.test tests/test_LabelGrid.py"

tests/test_LabelGrid.py

@@ -0,0 +1,13 @@
+import tkinter as tk
+
+import pytest
+
+from tk_tools import *
+
+from tests.test_basic import root
+
+
+def test_LabelGrid_header_len_doesnt_match_cols(root):
+    with pytest.raises(ValueError):
+        LabelGrid(root, 2, headers=['a', 'b', 'c'])
+

test.py → tests/test_basic.py

@@ -36,4 +36,10 @@ def test_init(root):
     bl.grid()
     ToolTip(bl, 'some text')
 
+    # if the test suite makes it to here, then all widgets
+    # have been successfully instantiated
     assert True
+
+
+
+

tk_tools/groups.py

@@ -14,7 +14,7 @@
     minus = ''
 
 
-class Grid(ttk.Frame):
+class _Grid(ttk.Frame):
     padding = 3
 
     """
@@ -94,7 +94,7 @@ def clear(self):
             self.remove_row(0)
 
 
-class LabelGrid(Grid):
+class LabelGrid(_Grid):
     """
     A table-like display widget.
 
@@ -131,7 +131,7 @@ def add_row(self, data: list):
         self.rows.append(row)
 
 
-class EntryGrid(Grid):
+class EntryGrid(_Grid):
     """
     Add a spreadsheet-like grid of entry widgets.
 
@@ -236,7 +236,7 @@ def read(self, as_dicts=True):
             return self._read_as_table()
 
 
-class ButtonGrid(Grid):
+class ButtonGrid(_Grid):
     """
     A grid of buttons.