Add a poppler_version function

pdftotext.cpp

@@ -3,6 +3,7 @@
 #include <poppler/cpp/poppler-document.h>
 #include <poppler/cpp/poppler-global.h>
 #include <poppler/cpp/poppler-page.h>
+#include <poppler/cpp/poppler-version.h>
 
 #include <algorithm>
 #include <climits>
@@ -244,10 +245,22 @@ static PyTypeObject PDFType = {
 
 static void do_nothing(const std::string&, void*) {}
 
+static PyObject* poppler_version(PyObject* self, PyObject* args) {
+    return PyUnicode_FromString(poppler::version_string().c_str());
+}
+
+static PyMethodDef Methods[] = {
+    {
+        "poppler_version",
+        poppler_version,
+        METH_NOARGS,
+        "Get the version of the poppler library in use.",
+    },
+    {NULL, NULL, 0, NULL}, // sentinel
+};
+
 static PyModuleDef pdftotextmodule = {
-    PyModuleDef_HEAD_INIT,
-    "pdftotext",
-    "Simple PDF text extraction.",
+    PyModuleDef_HEAD_INIT, "pdftotext", "Simple PDF text extraction.", -1, Methods,
 };
 
 PyMODINIT_FUNC PyInit_pdftotext() {

tests/test_pdftotext.py

@@ -2,6 +2,7 @@
 
 import io
 import pkg_resources
+import subprocess
 import unittest
 
 import pdftotext
@@ -271,3 +272,15 @@ def test_raw_vs_physical(self):
         pdf_raw = pdftotext.PDF(get_file(filename), raw=True)
         pdf_physical = pdftotext.PDF(get_file(filename), physical=True)
         self.assertNotEqual(pdf_raw[0], pdf_physical[0])
+
+
+class VersionTest(unittest.TestCase):
+    """Test the poppler_version function."""
+
+    def test_poppler_version(self):
+        poppler_version = (
+            subprocess.check_output(["pkg-config", "--modversion", "poppler-cpp"])
+            .decode()
+            .strip()
+        )
+        self.assertEqual(pdftotext.poppler_version(), poppler_version)