feat(color_map_selector): added colormap selector with plugin

tests/unit_tests/test_color_map_selector.py

@@ -0,0 +1,43 @@
+import pyqtgraph as pg
+import pytest
+
+from bec_widgets.widgets.color_map_selector.color_map_selector import ColormapSelector
+
+
+@pytest.fixture
+def color_map_selector(qtbot):
+    widget = ColormapSelector()
+    qtbot.addWidget(widget)
+    qtbot.waitExposed(widget)
+    yield widget
+    widget.close()
+
+
+def test_color_map_selector_init(color_map_selector):
+    assert color_map_selector is not None
+    assert isinstance(color_map_selector, ColormapSelector)
+
+    all_maps = pg.colormap.listMaps()
+    loaded_maps = [
+        color_map_selector.combo.itemText(i) for i in range(color_map_selector.combo.count())
+    ]
+    assert len(loaded_maps) > 0
+    assert all_maps == loaded_maps
+
+
+def test_color_map_selector_add_color_maps(color_map_selector):
+    color_map_selector.add_color_maps(["cividis", "viridis"])
+    assert color_map_selector.combo.count() == 2
+    assert color_map_selector.combo.itemText(0) == "cividis"
+    assert color_map_selector.combo.itemText(1) == "viridis"
+    assert color_map_selector.combo.itemText(2) != "cividis"
+    assert color_map_selector.combo.itemText(2) != "viridis"
+
+
+def test_colormap_add_maps_by_property(color_map_selector):
+    color_map_selector.colormaps = ["cividis", "viridis"]
+    assert color_map_selector.combo.count() == 2
+    assert color_map_selector.combo.itemText(0) == "cividis"
+    assert color_map_selector.combo.itemText(1) == "viridis"
+    assert color_map_selector.combo.itemText(2) != "cividis"
+    assert color_map_selector.combo.itemText(2) != "viridis"