Improving functionalities and adding unit tests

tests/helpers.py

@@ -43,6 +43,12 @@ class Contains:
   """
   s: str
 
+@dataclasses.dataclass
+class DoesNotContain:
+  """
+  To check if the attribute does not contain a specific value
+  """
+  s: str
 
 @dataclasses.dataclass
 class JsonViewerNode:
@@ -449,6 +455,11 @@ def matches(actual, expected, path=""):
       elif isinstance(expected.attrs[expected_attr], Contains):
         assert expected.attrs[expected_attr].s in actual.attrs[expected_attr], \
           f"{print_path(path)}Attribute '{expected_attr}' does not contain '{expected.attrs[expected_attr].s}': actual='{actual.attrs[expected_attr]}', expected ='{expected.attrs[expected_attr].s}'."
+
+      elif isinstance(expected.attrs[expected_attr], DoesNotContain):
+        assert expected.attrs[expected_attr].s not in actual.attrs[expected_attr], \
+          f"{print_path(path)}Attribute '{expected_attr}' does contain '{expected.attrs[expected_attr].s}' while it must not: actual='{actual.attrs[expected_attr]}'."
+
       
       else:
         assert actual.attrs[expected_attr] == expected.attrs[expected_attr], \
@@ -750,13 +761,14 @@ def icon(name: str):
   return NotStr(f'<svg name="{name}"')
 
 
-def div_icon(name: str):
+def div_icon(name: str, cls=None):
   """
   Test if an element is an icon wrapped in a div
   :param name:
+  :param cls:
   :return:
   """
-  return Div(NotStr(f'<svg name="{name}"'))
+  return Div(NotStr(f'<svg name="{name}"'), cls=cls)
 
 
 def span_icon(name: str):

tests/test_helpers.py

@@ -57,7 +57,8 @@ def sample_structure():
      "Path 'div[class=a long attr]':\n\tAttribute 'class' does not start with 'different start': actual='a long attr', expected ='different start'."),
     (Div(cls="a long attr"), Div(cls=Contains("not included")),
      "Path 'div[class=a long attr]':\n\tAttribute 'class' does not contain 'not included': actual='a long attr', expected ='not included'."),
-
+    (Div(cls="a long attr"), Div(cls=DoesNotContain("long attr")),
+     "Path 'div[class=a long attr]':\n\tAttribute 'class' does contain 'long attr' while it must not: actual='a long attr'."),
 ])
 def test_matches_error_expected(value, expected, expected_error):
   with pytest.raises(AssertionError) as error:
@@ -75,6 +76,7 @@ def test_matches_error_expected(value, expected, expected_error):
     (Div(), Div(Empty)),
     (Div(cls="a long attr"), Div(cls=StartsWith("a long"))),
     (Div(cls="a long attr"), Div(cls=Contains("long"))),
+    (Div(cls="a long attr"), Div(cls=DoesNotContain("xxxx"))),
 ])
 def test_matches_success_expected(value, expected):
   assert matches(value, expected)

tests/test_undo_redo.py

@@ -1,7 +1,24 @@
-from components.undo_redo.components.UndoRedo import UndoRedo
-from core.settings_management import SettingsManager, MemoryDbEngine
+import pytest
+from fasthtml.components import Div
+
+from components.undo_redo.components.UndoRedo import UndoRedo, CommandHistory
+from core.settings_management import SettingsManager, MemoryDbEngine
+from helpers import matches, div_icon, Contains, DoesNotContain
+from my_mocks import tabs_manager
+
+
+class UndoableCommand(CommandHistory):
+  def __init__(self, old_value=0, new_value=0):
+    super().__init__("command", f"The new value is {new_value}")
+    self.old_value = old_value
+    self.new_value = new_value
+  
+  def undo(self):
+    return Div(self.old_value, hx_swap_oob="true")
+  
+  def redo(self):
+    return Div(self.new_value, hx_swap_oob="true")
 
-TEST_UNDO_REDO_INSTANCE_ID = "test_undo_redo_instance_id"
 
 @pytest.fixture
 def undo_redo(session, tabs_manager):
@@ -11,5 +28,74 @@ def undo_redo(session, tabs_manager):
                   tabs_manager=tabs_manager)
 
 
+def test_i_can_render(undo_redo):
+  actual = undo_redo.__ft__()
+  expected = Div(
+    Div(div_icon("undo", cls=Contains("mmt-btn-disabled")), data_tooltip="Nothing to undo"),
+    Div(div_icon("redo", cls=Contains("mmt-btn-disabled")), data_tooltip="Nothing to redo"),
+    id=undo_redo.get_id(),
+  )
+  
+  assert matches(actual, expected)
+
+
+def test_i_can_render_when_undoing_and_redoing(undo_redo):
+  undo_redo.push(UndoableCommand())
+  undo_redo.push(UndoableCommand())
+  
+  actual = undo_redo.__ft__()
+  expected = Div(
+    Div(div_icon("undo", cls=DoesNotContain("mmt-btn-disabled")), data_tooltip="Undo "),
+    Div(div_icon("redo", cls=Contains("mmt-btn-disabled")), data_tooltip=""),
+    id=undo_redo.get_id(),
+  )
+  assert matches(actual, expected)
+  
+  undo_redo.undo()  # The command is now undone. We can redo it and undo the first command.
+  actual = undo_redo.__ft__()
+  expected = Div(
+    div_icon("undo", cls=DoesNotContain("mmt-btn-disabled")),
+    div_icon("redo", cls=DoesNotContain("mmt-btn-disabled")),
+    id=undo_redo.get_id(),
+  )
+  assert matches(actual, expected)
+  
+  undo_redo.undo()  # Undo again, I cannot undo anymore.
+  actual = undo_redo.__ft__()
+  expected = Div(
+    div_icon("undo", cls=Contains("mmt-btn-disabled")),
+    div_icon("redo", cls=DoesNotContain("mmt-btn-disabled")),
+    id=undo_redo.get_id(),
+  )
+  assert matches(actual, expected)
+  
+  undo_redo.redo()  # Redo once.
+  actual = undo_redo.__ft__()
+  expected = Div(
+    div_icon("undo", cls=DoesNotContain("mmt-btn-disabled")),
+    div_icon("redo", cls=DoesNotContain("mmt-btn-disabled")),
+    id=undo_redo.get_id(),
+  )
+  assert matches(actual, expected)
+  
+  undo_redo.redo()  # Redo a second time.
+  actual = undo_redo.__ft__()
+  expected = Div(
+    div_icon("undo", cls=DoesNotContain("mmt-btn-disabled")),
+    div_icon("redo", cls=Contains("mmt-btn-disabled")),
+    id=undo_redo.get_id(),
+  )
+  assert matches(actual, expected)
+
+
 def test_i_can_undo_and_redo(undo_redo):
-  pass
+  undo_redo.push(UndoableCommand(0, 1))
+  undo_redo.push(UndoableCommand(1, 2))
+  
+  self, res = undo_redo.undo()
+  expected = Div(1, hx_swap_oob="true")
+  assert matches(res, expected)
+  
+  self, res = undo_redo.redo()
+  expected = Div(2, hx_swap_oob="true")
+  assert matches(res, expected)