fix: handle tesseract error on invalid tessdata

pytesseract/pytesseract.py

@@ -428,9 +428,8 @@ def get_languages(config=''):
     except OSError:
         raise TesseractNotFoundError()
 
-    # tesseract 3.x
-    if result.returncode not in (0, 1):
-        raise TesseractNotFoundError()
+    if result.returncode != 0 :
+        raise TesseractError(result.returncode, "--list-langs failed")
 
     languages = []
     if result.stdout:

tests/pytesseract_test.py

@@ -23,6 +23,7 @@
 from pytesseract import Output
 from pytesseract import run_and_get_multiple_output
 from pytesseract import TesseractNotFoundError
+from pytesseract import TesseractError
 from pytesseract import TSVNotSupported
 from pytesseract.pytesseract import file_to_dict
 from pytesseract.pytesseract import numpy_installed
@@ -467,12 +468,16 @@ def test_proper_oserror_exception_handling(monkeypatch, test_file, test_path):
     ],
 )
 def test_get_languages(test_config, expected):
-    result = get_languages.__wrapped__(test_config)
-    if not result:
-        assert result == []
+    try :
+        result = get_languages.__wrapped__(test_config)
+        if not result:
+            assert result == []
+
+        for lang in expected:
+            assert lang in result
+    except TesseractError:
+        assert expected == ()
 
-    for lang in expected:
-        assert lang in result
 
 
 @pytest.mark.parametrize(