Fix some small linting issues. (#41)

* fix some linting

* add tests

* update versions

* update setup

tests/test_collapsible.py

@@ -9,12 +9,12 @@ def test_checked_initialization(qtbot):
     """Test simple collapsible"""
     wdg1 = QCollapsible("Advanced analysis")
     wdg1.expand(False)
-    assert wdg1.expanded() is True
+    assert wdg1.isExpanded()
     assert wdg1._content.maximumHeight() > 0
 
     wdg2 = QCollapsible("Advanced analysis")
     wdg1.collapse(False)
-    assert wdg2.expanded() is False
+    assert not wdg2.isExpanded()
     assert wdg2._content.maximumHeight() == 0
 
 
@@ -27,11 +27,11 @@ def test_content_hide_show(qtbot):
         collapsible.addWidget(QPushButton(f"Content button {i + 1}"))
 
     collapsible.collapse(False)
-    assert collapsible.expanded() is False
+    assert not collapsible.isExpanded()
     assert collapsible._content.maximumHeight() == 0
 
     collapsible.expand(False)
-    assert collapsible.expanded() is True
+    assert collapsible.isExpanded()
     assert collapsible._content.maximumHeight() > 0
 
 
@@ -41,12 +41,24 @@ def test_locking(qtbot):
     assert wdg1.locked() is False
     wdg1.setLocked(True)
     assert wdg1.locked() is True
+    assert not wdg1.isExpanded()
 
-    # Simulate button press
     wdg1._toggle_btn.setChecked(True)
-    wdg1._toggle()
+    assert not wdg1.isExpanded()
 
-    assert wdg1.expanded() is False
+    wdg1._toggle()
+    assert not wdg1.isExpanded()
+
+    wdg1.expand()
+    assert not wdg1.isExpanded()
+
+    wdg1._toggle_btn.setChecked(False)
+    assert not wdg1.isExpanded()
+
+    wdg1.setLocked(False)
+    wdg1.expand()
+    assert wdg1.isExpanded()
+    assert wdg1._toggle_btn.isChecked()
 
 
 def test_changing_animation_settings(qtbot):
@@ -64,3 +76,11 @@ def test_changing_content(qtbot):
     wdg = QCollapsible()
     wdg.setContent(content)
     assert wdg._content == content
+
+
+def test_changing_text(qtbot):
+    """Test changing the content"""
+    wdg = QCollapsible()
+    wdg.setText("Hi new text")
+    assert wdg.text() == "Hi new text"
+    assert wdg._toggle_btn.text() == QCollapsible._COLLAPSED + "Hi new text"