Add TEXINPUTS related test

nbconvert/exporters/tests/test_pdf.py

@@ -8,6 +8,7 @@
 from tempfile import TemporaryDirectory
 
 from ...tests.utils import onlyif_cmds_exist
+from ...utils import _contextlib_chdir
 from ..pdf import PDFExporter
 from .base import ExportersTestsBase
 
@@ -39,3 +40,24 @@ def test_export(self):
             assert len(output) > 0
             # all temporary file should be cleaned up
             assert {file_name} == set(os.listdir(td))
+
+    @onlyif_cmds_exist("xelatex", "pandoc")
+    def test_texinputs(self):
+        """
+        Is TEXINPUTS set properly when we are converting
+        - in the same directory, and
+        - in a different directory?
+        """
+        with TemporaryDirectory() as td, _contextlib_chdir.chdir(td):
+            os.mkdir("folder")
+            file_name = os.path.basename(self._get_notebook())
+            nb1 = os.path.join(td, file_name)
+            nb2 = os.path.join(td, "folder", file_name)
+            ex1 = self.exporter_class(latex_count=1)  # type:ignore
+            ex2 = self.exporter_class(latex_count=1)  # type:ignore
+            shutil.copy(self._get_notebook(), nb1)
+            shutil.copy(self._get_notebook(), nb2)
+            _ = ex1.from_filename(nb1)
+            _ = ex2.from_filename(nb2)
+            assert ex1.texinputs == os.path.abspath(".")
+            assert ex2.texinputs == os.path.abspath("./folder")