libs pytplot tests are added

pyspedas/utilities/tests/libs_tests.py

@@ -2,17 +2,20 @@
 from io import StringIO
 import sys
 import pyspedas
+import pytplot
 from pyspedas.utilities.libs import libs
 
 
 class LibsTestCase(unittest.TestCase):
 
     def setUp(self):
-        # Call function once to import all the submodules to silence the output
-        try:
-            libs('')
-        except Exception as e:
-            self.fail("Unexpected exception %s" % e)
+
+        # We do not need this anymore:
+        # # Call function once to import all the submodules to silence the output
+        # try:
+        #     libs('')
+        # except Exception as e:
+        #     self.fail("Unexpected exception %s" % e)
 
         # Redirect stdout to capture print statements
         self.held_stdout = sys.stdout
@@ -39,12 +42,46 @@ def test_partial_function_name(self):
         output = sys.stdout.getvalue()
         self.assertIn('mms_', output)
 
-    def test_different_package(self):
+    def test_known_function_subpackage(self):
         libs('fgm', package=pyspedas.themis)
         output = sys.stdout.getvalue()
         self.assertIn('fgm', output)
         self.assertNotIn('mms', output)
 
+    def test_known_function_pytplot(self):
+        libs('get_data')
+        output = sys.stdout.getvalue()
+        self.assertIn('get_data', output)
+        self.assertIn('Function:', output)
+
+    def test_known_function_version_pyspeds_subpackage(self):
+        libs('version', package=pyspedas)
+        output = sys.stdout.getvalue()
+        self.assertIn('version', output)
+        self.assertNotIn('Function: pytplot', output)
+
+    def test_known_function_version_pyspeds_themis_subpackage(self):
+        libs('fgm', package=pyspedas.themis)
+        output = sys.stdout.getvalue()
+        self.assertIn('fgm', output)
+
+    def test_known_function_pytplot_get_data(self):
+        libs('get_data')
+        output = sys.stdout.getvalue()
+        self.assertIn('get_data', output)
+        self.assertIn('Function:', output)
+
+    def test_known_function_data_pytplot_subpackage_only(self):
+        libs('data', package=pytplot)
+        output = sys.stdout.getvalue()
+        self.assertIn('get_data', output)
+        self.assertNotIn('Function: pyspedas', output)
+
+    def test_qtplotter_error_exception(self):
+        # This test is probably not the best way to handle this exception
+        libs('qtplotter', package=pytplot)  # This can be changed to anything. qtplotter error is during pytplot import search
+        output = sys.stdout.getvalue()
+        self.assertNotIn('Error importing module pytplot.QtPlotter', output)
 
 if __name__ == '__main__':
     unittest.main()