Fix validation of languages not using tesseract_env

And some related issues.

src/ocrmypdf/_validation.py

@@ -84,12 +84,12 @@ def check_options_languages(options):
         options.language = options.language[0].split('+')
 
     languages = set(options.language)
-    if not languages.issubset(tesseract.languages()):
+    if not languages.issubset(tesseract.languages(options.tesseract_env)):
         msg = (
             "The installed version of tesseract does not have language "
             "data for the following requested languages: \n"
         )
-        for lang in languages - tesseract.languages():
+        for lang in languages - tesseract.languages(options.tesseract_env):
             msg += lang + '\n'
         raise MissingDependencyError(msg)
 

tests/conftest.py

@@ -241,7 +241,7 @@ def run_ocrmypdf_api(input_file, output_file, *args, env=None):
         [str(input_file), str(output_file)]
         + [str(arg) for arg in args if arg is not None]
     )
-    api.check_options(options)
+
     if env:
         options.tesseract_env = env.copy()
         options.tesseract_env['_OCRMYPDF_TEST_INFILE'] = os.fspath(input_file)
@@ -252,6 +252,7 @@ def run_ocrmypdf_api(input_file, output_file, *args, env=None):
     if options.tesseract_env:
         assert all(isinstance(v, (str, bytes)) for v in options.tesseract_env.values())
 
+    api.check_options(options)
     return api.run_pipeline(options, plugin_manager=None, api=False)
 
 

tests/test_main.py

@@ -186,10 +186,10 @@ def test_tesseract_missing_tessdata(resources, no_outpdf, tmpdir):
     env = os.environ.copy()
     env['TESSDATA_PREFIX'] = os.fspath(tmpdir)
 
-    returncode = run_ocrmypdf_api(
-        resources / 'graph.pdf', no_outpdf, '-v', '1', '--skip-text', env=env
-    )
-    assert returncode == ExitCode.missing_dependency
+    with pytest.raises(MissingDependencyError):
+        run_ocrmypdf_api(
+            resources / 'graph.pdf', no_outpdf, '-v', '1', '--skip-text', env=env
+        )
 
 
 def test_invalid_input_pdf(resources, no_outpdf):