API: parser de filtres et génération SQL paramétré (#78)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/api/test_filters.py

@@ -0,0 +1,141 @@
+import polars as pl
+import pytest
+
+from src.api.filters import FilterError, build_where
+
+SCHEMA = pl.Schema(
+    {
+        "uid": pl.String,
+        "objet": pl.String,
+        "montant": pl.Float64,
+        "annee": pl.Int64,
+        "dateNotification": pl.Date,
+    }
+)
+
+
+def test_no_filters_returns_true():
+    where, params, order = build_where([], SCHEMA)
+    assert where == "TRUE"
+    assert params == []
+    assert order is None
+
+
+def test_exact_filter():
+    where, params, _ = build_where([("uid__exact", "abc")], SCHEMA)
+    assert where == '"uid" = ?'
+    assert params == ["abc"]
+
+
+def test_contains_filter_uses_like_wildcards():
+    where, params, _ = build_where([("objet__contains", "informatique")], SCHEMA)
+    assert where == '"objet" LIKE ?'
+    assert params == ["%informatique%"]
+
+
+def test_notcontains_filter():
+    where, params, _ = build_where([("objet__notcontains", "x")], SCHEMA)
+    assert where == '"objet" NOT LIKE ?'
+    assert params == ["%x%"]
+
+
+def test_comparison_operators_on_int():
+    where, params, _ = build_where([("annee__strictly_greater", "2023")], SCHEMA)
+    assert where == '"annee" > ?'
+    assert params == [2024 - 1]  # int coercion: 2023
+
+
+def test_in_filter_splits_on_commas():
+    where, params, _ = build_where([("annee__in", "2022,2023,2024")], SCHEMA)
+    assert where == '"annee" IN (?,?,?)'
+    assert params == [2022, 2023, 2024]
+
+
+def test_notin_filter():
+    where, params, _ = build_where([("annee__notin", "2020,2021")], SCHEMA)
+    assert where == '"annee" NOT IN (?,?)'
+    assert params == [2020, 2021]
+
+
+def test_isnull_filter_ignores_value():
+    where, params, _ = build_where([("dateNotification__isnull", "anything")], SCHEMA)
+    assert where == '"dateNotification" IS NULL'
+    assert params == []
+
+
+def test_isnotnull_filter():
+    where, params, _ = build_where([("dateNotification__isnotnull", "")], SCHEMA)
+    assert where == '"dateNotification" IS NOT NULL'
+
+
+def test_multiple_filters_joined_by_and():
+    where, params, _ = build_where(
+        [("uid__exact", "a"), ("annee__greater", "2020")], SCHEMA
+    )
+    assert where == '"uid" = ? AND "annee" >= ?'
+    assert params == ["a", 2020]
+
+
+def test_unknown_column_raises():
+    with pytest.raises(FilterError) as exc:
+        build_where([("foo__exact", "bar")], SCHEMA)
+    assert "foo" in str(exc.value)
+    assert exc.value.field == "foo__exact"
+
+
+def test_unknown_operator_raises():
+    with pytest.raises(FilterError) as exc:
+        build_where([("uid__weird", "x")], SCHEMA)
+    assert "weird" in str(exc.value)
+
+
+def test_bad_int_value_raises():
+    with pytest.raises(FilterError):
+        build_where([("annee__exact", "notanint")], SCHEMA)
+
+
+def test_bad_date_value_raises():
+    with pytest.raises(FilterError):
+        build_where([("dateNotification__exact", "notadate")], SCHEMA)
+
+
+def test_date_iso_coercion():
+    where, params, _ = build_where(
+        [("dateNotification__greater", "2024-01-01")], SCHEMA
+    )
+    from datetime import date
+
+    assert params == [date(2024, 1, 1)]
+
+
+def test_reserved_params_are_ignored():
+    where, params, order = build_where(
+        [
+            ("page", "2"),
+            ("page_size", "100"),
+            ("columns", "uid"),
+            ("count", "false"),
+            ("uid__exact", "z"),
+        ],
+        SCHEMA,
+    )
+    assert where == '"uid" = ?'
+    assert params == ["z"]
+
+
+def test_sort_returns_order_by():
+    where, params, order = build_where(
+        [("annee__sort", "desc"), ("uid__sort", "asc")], SCHEMA
+    )
+    assert where == "TRUE"
+    assert order == '"annee" DESC, "uid" ASC'
+
+
+def test_sort_invalid_direction_raises():
+    with pytest.raises(FilterError):
+        build_where([("uid__sort", "sideways")], SCHEMA)
+
+
+def test_param_without_operator_raises():
+    with pytest.raises(FilterError):
+        build_where([("uidexact", "x")], SCHEMA)