export: Test and implement export of string fiels

export.py

@@ -23,4 +23,25 @@
       are not yet supported, unless the same mapping applies to all the types.
       More complex cases should be handled with ``custom``.
     """
-    return {}
+
+    fields = record.fields_get()
+
+    output = {}
+
+    for key, options in mapping.items():
+        source, custom, mapping = options.get('source'), options.get(
+            'custom'), options.get('mapping')
+
+        if source is None and custom is None:
+            source = key
+
+        if source is not None:
+            field = fields[source]
+
+            value = getattr(record, source)
+            if value is False:
+                value = None
+
+            output[key] = value
+
+    return output

pyproject.toml

+[tool.black]
+line-length = 79

tests/__init__.py

 # flake8: noqa
 
 from . import test_xbus_emitter
+from . import test_export

tests/test_export.py

+import odoo
+
+from ..export import export
+from .util.odoo_tests import TestBase
+
+
+@odoo.tests.common.at_install(False)
+@odoo.tests.common.post_install(True)
+class Test(TestBase):
+    def test_export_string_field(self):
+        record = self.env["res.partner"].create({"name": "my name"})
+        self.assertEqual(
+            {"name": "my name", "company": None},
+            export(
+                record, {"name": {}, "company": {"source": "company_name"}}
+            ),
+        )