rework of where tests

tests/test_sqlite.py

@@ -29,22 +29,19 @@ def test_from():
         from_stmt("    ")
 
 
-def test_where():
-    lhs = "lhs"
-    rhs = "rhs"
-    assert where_stmt(lhs, rhs).strip() == f"WHERE {lhs}={rhs}"
-    with pytest.raises(ValueError):
-        where_stmt("", lhs)
-    with pytest.raises(ValueError):
-        where_stmt("    ", lhs)
-    with pytest.raises(ValueError):
-        where_stmt(rhs, "")
-    with pytest.raises(ValueError):
-        where_stmt(rhs, "    ")
+@pytest.mark.parametrize("lhs", ["lhs", "  lhs  ", "lhs  "])
+@pytest.mark.parametrize("rhs", ["rhs", "rhs    ", " rhs "])
+def test_where_strip(lhs, rhs):
+    assert where_stmt(lhs, rhs).strip() == "WHERE lhs=rhs"
+
+
+@pytest.mark.parametrize("lhs", ["", "    ", " "])
+@pytest.mark.parametrize("rhs", ["rhs", "rhs    ", " rhs "])
+def test_invalid_lhs_wheres(lhs, rhs):
     with pytest.raises(ValueError):
-        where_stmt(rhs, lhs, "")
+        where_stmt(lhs, rhs)
     with pytest.raises(ValueError):
-        where_stmt(rhs, lhs, "    ")
+        where_stmt(rhs, lhs)
 
 
 def test_join():