Spectrum veiwer system tests (#2278)

docs/release_notes/next/dev-2277-spectrum-veiwer-system-tests

@@ -0,0 +1 @@
+#2277: System tests for spectum viewer

mantidimaging/gui/test/gui_system_base.py

@@ -119,6 +119,9 @@ def _open_operations(self):
     def _open_reconstruction(self):
         self.main_window.actionRecon.trigger()
 
+    def _open_spectrum_viewer(self):
+        self.main_window.actionSpectrumViewer.trigger()
+
     def _close_image_stacks(self):
         while self.main_window.dataset_tree_widget.topLevelItemCount():
             self.main_window.dataset_tree_widget.topLevelItem(0).setSelected(True)

mantidimaging/gui/test/gui_system_spectrum_test.py

@@ -0,0 +1,58 @@
+# Copyright (C) 2024 ISIS Rutherford Appleton Laboratory UKRI
+# SPDX - License - Identifier: GPL-3.0-or-later
+from __future__ import annotations
+
+from unittest import mock
+
+from PyQt5.QtCore import Qt
+from PyQt5.QtTest import QTest
+
+from mantidimaging.gui.test.gui_system_base import GuiSystemBase, SHOW_DELAY, SHORT_DELAY
+from mantidimaging.test_helpers.qt_test_helpers import wait_until
+
+
+class TestGuiSpectrumViewer(GuiSystemBase):
+
+    def setUp(self) -> None:
+        patcher_show_error_dialog = mock.patch(
+            "mantidimaging.gui.windows.spectrum_viewer.view.SpectrumViewerWindowView.show_error_dialog")
+        self.mock_show_error_dialog = patcher_show_error_dialog.start()
+        self.addCleanup(patcher_show_error_dialog.stop)
+        super().setUp()
+        self._close_welcome()
+        self._load_data_set()
+
+        self._open_spectrum_viewer()
+        assert self.main_window.spectrum_viewer is not None
+        self.spectrum_window = self.main_window.spectrum_viewer
+
+        self.assertTrue(self.spectrum_window.isVisible())
+
+        wait_until(lambda: self.spectrum_window.presenter.model._stack is not None, max_retry=600)
+
+    def tearDown(self) -> None:
+        self._close_image_stacks()
+        super().tearDown()
+        self.assertFalse(self.main_window.isVisible())
+
+    def test_spectrum_window_opens_with_data_in_default_state(self) -> None:
+        self.assertFalse(self.spectrum_window.normaliseCheckBox.isChecked())
+        self.assertFalse(self.spectrum_window.normalise_ShutterCount_CheckBox.isEnabled())
+        self.assertEqual(self.spectrum_window.roi_table_model.rowCount(), 1)
+        self.assertEqual(self.spectrum_window.roi_table_model.columnCount(), 3)
+        self.assertTrue(self.spectrum_window.addBtn.isEnabled())
+        self.assertTrue(self.spectrum_window.removeBtn.isEnabled())
+        self.assertTrue(self.spectrum_window.exportButton.isEnabled())
+        self.assertIn('roi', self.spectrum_window.roi_table_model.roi_names())
+        self.assertIn('roi', self.spectrum_window.spectrum_widget.roi_dict)
+        QTest.qWait(SHOW_DELAY)
+
+    def test_add_roi(self) -> None:
+        for i in range(1, 4):
+            initial_roi_count = self.spectrum_window.roi_table_model.rowCount()
+            QTest.mouseClick(self.spectrum_window.addBtn, Qt.MouseButton.LeftButton)
+            QTest.qWait(SHORT_DELAY)
+            final_roi_count = self.spectrum_window.roi_table_model.rowCount()
+            self.assertEqual(final_roi_count, initial_roi_count + 1)
+            self.assertIn(f'roi_{i}', self.spectrum_window.roi_table_model.roi_names())
+            self.assertIn(f'roi_{i}', self.spectrum_window.spectrum_widget.roi_dict)