From e23096740aa6c929daa7965929648ff49fb6b631 Mon Sep 17 00:00:00 2001
From: vennyy3 <vendelasoiland@hotmail.com>
Date: Tue, 21 Jul 2026 14:27:36 +0200
Subject: [PATCH] DAT-534 tests for bugfixes

---
 py_maplib/tests/test_custom_functions.py | 72 +++++++++++++++++++++++-
 1 file changed, 71 insertions(+), 1 deletion(-)

diff --git a/py_maplib/tests/test_custom_functions.py b/py_maplib/tests/test_custom_functions.py
index cce8e484..1592ce00 100644
--- a/py_maplib/tests/test_custom_functions.py
+++ b/py_maplib/tests/test_custom_functions.py
@@ -1,6 +1,9 @@
+import polars as pl
 import pytest
+from polars.testing import assert_frame_equal
+
+from maplib import Model, RDFType, MaplibException, rdf
 
-from maplib import Model, RDFType, MaplibException
 
 def test_struuidv5_dns():
     m = Model()
@@ -77,3 +80,70 @@ def test_struuidv5_valid():
     """)
     assert df.height == 3
 
+def test_concat_lang_string_same_lang():
+    m = Model()
+    df = m.query("""
+    SELECT * WHERE {
+        VALUES ?name {"bar"@en}
+        BIND(concat("foo"@en, ?name) AS ?concatstr)
+    }
+    """)
+    expected_df = pl.from_repr(
+        """
+    ┌─────────────┬──────────┐
+    │ concatstr   ┆ name     │
+    │ ---         ┆ ---      │
+    │ str         ┆ str      │
+    ╞═════════════╪══════════╡
+    │ "foobar"@en ┆ "bar"@en │
+    └─────────────┴──────────┘
+    """
+    )
+    sm = m.query("""
+    SELECT * WHERE {
+        VALUES ?name {"bar"@en}
+        BIND(concat("foo"@en, ?name) AS ?concatstr)
+    }
+    """, solution_mappings=True)
+    assert_frame_equal(df, expected_df)
+    assert sm.rdf_types["concatstr"] == RDFType.Literal(rdf.langString)
+
+def test_concat_lang_string_diff_lang():
+    m = Model()
+    df = m.query("""
+    SELECT * WHERE {
+        VALUES ?name {"bar"@en}
+        BIND(concat(?name, "noe"@no) AS ?concatstr)
+    }
+    """)
+    expected_df = pl.from_repr("""
+    ┌─────────────┬──────────┐
+    │ concatstr   ┆ name     │
+    │ ---         ┆ ---      │
+    │ str         ┆ str      │
+    ╞═════════════╪══════════╡
+    │ "barnoe"@en ┆ "bar"@en │
+    └─────────────┴──────────┘
+    """
+    )
+    assert_frame_equal(df, expected_df)
+
+def test_encoding_of_parenthesis():
+    m = Model()
+    df = m.query("""
+    SELECT * WHERE {
+        VALUES ?name {"Foo(bar)"}
+        BIND(ENCODE_FOR_URI(?name) AS ?encodedstr)
+    }
+    """)
+    expected_df = pl.from_repr("""
+    ┌──────────────┬──────────┐
+    │ encodedstr   ┆ name     │
+    │ ---          ┆ ---      │
+    │ str          ┆ str      │
+    ╞══════════════╪══════════╡
+    │ Foo%28bar%29 ┆ Foo(bar) │
+    └──────────────┴──────────┘
+    """
+    )
+    assert_frame_equal(df, expected_df)
\ No newline at end of file