Update tests/test_cube3d.py, tests/test_map2d.py, tests/test_spec1d.py

tests/test_cube3d.py

 import sys
 sys.path.insert(0, '..')
 import unittest
-from gehong import spec1d as s
-from gehong import map2d as m
-from gehong import cube3d as b
-from gehong import config as c
+from csst_ifs_gehong import spec1d as s
+from csst_ifs_gehong import map2d as m
+from csst_ifs_gehong import cube3d as b
+from csst_ifs_gehong import config as c
 import numpy as np
 import matplotlib.pyplot as plt
 
@@ -76,4 +76,4 @@ class test_cube3d(unittest.TestCase):
         print(">>> Unit test for **Spec Cube** Modelling has been passed!")
 
 if __name__=='__main__':
-    unittest.main()
+    unittest.main()
\ No newline at end of file

tests/test_map2d.py

 import sys
 sys.path.insert(0, '..')
 import unittest
-from gehong import map2d as m
-from gehong import config as c
+from csst_ifs_gehong import map2d as m
+from csst_ifs_gehong import config as c
 import numpy as np
 import matplotlib.pyplot as plt
 
@@ -234,4 +234,4 @@ class test_map2d(unittest.TestCase):
             print("SBmap No Problem!")
 
 if __name__=='__main__':
-    unittest.main()
+    unittest.main()
\ No newline at end of file

tests/test_spec1d.py

 import sys
 sys.path.insert(0, '..')
 import unittest
-from gehong import spec1d as s
-from gehong import config as c
+from csst_ifs_gehong import spec1d as s
+from csst_ifs_gehong import config as c
 import numpy as np
 import matplotlib.pyplot as plt
 
@@ -365,4 +365,4 @@ class test_spec1d(unittest.TestCase):
         print(">>> Unit test for **AGN** Modelling has been passed!")
 
 if __name__=='__main__':
-    unittest.main()
+    unittest.main()
\ No newline at end of file