recon-driven sql composer; pick → compose → execute; llm out of structural sql

tests/test_composer_dates.py

@@ -0,0 +1,50 @@
+"""Date-range resolver tests — bounds parsing + dispatch on column type."""
+
+import pytest
+
+from api.composer.dates import _bounds, resolve_date_range
+from api.composer.types import PickValidationError
+from api.recon.types import Column
+
+
+def test_bounds_year():
+    assert _bounds("1996") == ("1996-01-01", "1996-12-31")
+
+
+def test_bounds_quarter_q1():
+    assert _bounds("1996-Q1") == ("1996-01-01", "1996-03-31")
+
+
+def test_bounds_quarter_q3():
+    assert _bounds("1996-Q3") == ("1996-07-01", "1996-09-30")
+
+
+def test_bounds_unsupported_raises():
+    with pytest.raises(PickValidationError, match="unsupported"):
+        _bounds("Q3-1996")
+
+
+def test_resolve_real_date_column():
+    col = Column(name="date", sql_type="DATE", nullable=False)
+    out = resolve_date_range("1996", col, '"l"."date"')
+    assert out == "\"l\".\"date\" BETWEEN '1996-01-01' AND '1996-12-31'"
+
+
+def test_resolve_timestamp_column():
+    col = Column(name="created_at", sql_type="TIMESTAMP WITHOUT TIME ZONE", nullable=True)
+    out = resolve_date_range("1996-Q2", col, '"x"."created_at"')
+    assert out == "\"x\".\"created_at\" BETWEEN '1996-04-01' AND '1996-06-30'"
+
+
+def test_resolve_yymmdd_semantic_type():
+    col = Column(name="date", sql_type="INTEGER", nullable=False,
+                 semantic_type="date_yymmdd")
+    out = resolve_date_range("1996", col, '"l"."date"')
+    assert "TO_DATE(LPAD(" in out
+    assert "BETWEEN '1996-01-01' AND '1996-12-31'" in out
+
+
+def test_resolve_unsupported_column_type_raises():
+    col = Column(name="x", sql_type="TEXT", nullable=True)
+    with pytest.raises(PickValidationError, match="not supported"):
+        resolve_date_range("1996", col, '"x"."x"')