Backmerge: #2312 - Export of ambiguous monomers doesn't work (error a…

…ppears) to any export format (even to SVG/PNG) except KET (#2530)

api/tests/integration/ref/formats/ket_ambiguous_export.py.out

@@ -0,0 +1,10 @@
+Test mol v2000
+molecule: Ambiguous monomer cannot be transform to SGroup.
+Test mol v3000
+molfile saver: Ambiguous monomer cannot be saved to molfile.
+Test cdxml
+molecule: Ambiguous monomer cannot be transform to SGroup.
+Test cml
+molecule: Ambiguous monomer cannot be transform to SGroup.
+Test smiles
+*

api/tests/integration/tests/formats/ket_ambiguous_export.py

@@ -0,0 +1,53 @@
+import difflib
+import os
+import sys
+
+
+def find_diff(a, b):
+    return "\n".join(difflib.unified_diff(a.splitlines(), b.splitlines()))
+
+
+sys.path.append(
+    os.path.normpath(
+        os.path.join(os.path.abspath(__file__), "..", "..", "..", "common")
+    )
+)
+from env_indigo import (  # noqa
+    Indigo,
+    IndigoException,
+    getIndigoExceptionText,
+    joinPathPy,
+)
+
+indigo = Indigo()
+
+root = joinPathPy("molecules/macro/", __file__)
+
+mol = indigo.loadMoleculeFromFile(os.path.join(root, "ambiguous.ket"))
+print("Test mol v2000")
+try:
+    indigo.setOption("molfile-saving-mode", "2000")
+    print(mol.molfile())
+except IndigoException as e:
+    print(getIndigoExceptionText(e))
+print("Test mol v3000")
+try:
+    indigo.setOption("molfile-saving-mode", "3000")
+    print(mol.molfile())
+except IndigoException as e:
+    print(getIndigoExceptionText(e))
+print("Test cdxml")
+try:
+    print(mol.cdxml())
+except IndigoException as e:
+    print(getIndigoExceptionText(e))
+print("Test cml")
+try:
+    print(mol.cml())
+except IndigoException as e:
+    print(getIndigoExceptionText(e))
+print("Test smiles")
+try:
+    print(mol.smiles())
+except IndigoException as e:
+    print(getIndigoExceptionText(e))