feat(progressbar): added bec progressbar

tests/unit_tests/test_bec_progressbar.py

@@ -0,0 +1,35 @@
+import numpy as np
+import pytest
+
+from bec_widgets.widgets.bec_progressbar.bec_progressbar import BECProgressBar
+
+
+@pytest.fixture
+def progressbar(qtbot):
+    widget = BECProgressBar()
+    qtbot.addWidget(widget)
+    qtbot.waitExposed(widget)
+    yield widget
+
+
+def test_progressbar(progressbar):
+    progressbar.update()
+
+
+def test_progressbar_set_value(qtbot, progressbar):
+    progressbar.set_minimum(0)
+    progressbar.set_maximum(100)
+    progressbar.set_value(50)
+    progressbar.paintEvent(None)
+
+    qtbot.waitUntil(
+        lambda: np.isclose(
+            progressbar._value, progressbar._user_value * progressbar._oversampling_factor
+        )
+    )
+
+
+def test_progressbar_label(progressbar):
+    progressbar.label_template = "Test: $value"
+    progressbar.set_value(50)
+    assert progressbar.center_label.text() == "Test: 50"