2.0 first commit

test/test_topbar.py

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+import unittest
+import pandas as pd
+
+from lightweight_charts import Chart
+
+
+class TestTopBar(unittest.TestCase):
+    def test_switcher_fires_event(self):
+        chart = Chart()
+        chart.topbar.switcher('a', ('1', '2'), func=lambda c: (self.assertEqual(c.topbar['a'].value, '2'), c.exit()))
+        chart.run_script(f'{chart.topbar["a"].id}.intervalElements[1].dispatchEvent(new Event("click"))')
+        chart.show(block=True)
+
+    def test_button_fires_event(self):
+        chart = Chart()
+        chart.topbar.button('a', '1', func=lambda c: (self.assertEqual(c.topbar['a'].value, '2'), c.exit()))
+        chart.topbar['a'].set('2')
+        chart.run_script(f'{chart.topbar["a"].id}.elem.dispatchEvent(new Event("click"))')
+        chart.show(block=True)
+
+
+if __name__ == '__main__':
+    unittest.main()