Add test for textMetadata

Change-Id: Id114dcb51b8eed2da9818cfaecd379b56e69fe6e
diff --git a/KorAPClient/tests/test_korapclient.py b/KorAPClient/tests/test_korapclient.py
index e5e9988..eb44d1c 100644
--- a/KorAPClient/tests/test_korapclient.py
+++ b/KorAPClient/tests/test_korapclient.py
@@ -80,6 +80,16 @@
         tokens = self.kcon.corpusStats(vc=['pubPlaceKey=DE', 'pubPlaceKey=CH'])['tokens']
         self.assertGreater(tokens.iloc[0], tokens.iloc[1])
 
+    def test_textMetadata(self):
+        df = self.kcon.textMetadata(["WUD17/A97/08542", "WUD17/B96/57558", "WUD17/A97/08541"])
+        self.assertEqual(len(df), 3)
+        self.assertIn('textSigle', df.columns)
+        self.assertIn('title', df.columns)
+        self.assertIn('pubDate', df.columns)
+        self.assertIn('creationDate', df.columns)
+        self.assertIn('pubPlace', df.columns)
+        self.assertIn('author', df.columns)
+
 
 if __name__ == '__main__':
     unittest.main()