Also fuzz test the JSONB code (#8)

Before this we only fuzz tested the code on normal table columns. But
with the code for the normal columns and jsonb fields getting some
differences it's good to test both.

fuzz/fuzz_test.go

@@ -1,6 +1,7 @@
 package fuzz
 
 import (
+	"encoding/json"
 	"strings"
 	"testing"
 
@@ -33,20 +34,69 @@ func FuzzConverter(f *testing.F) {
 		`{"name": {}}`,
 		`{"$or": []}`,
 		`{"status": {"$in": []}}`,
+		`{"$or": [{}, {}]}`,
+		`{"\"bla = 1 --": 1}`,
 	}
 	for _, tc := range tcs {
-		f.Add(tc)
+		f.Add(tc, true)
+		f.Add(tc, false)
 	}
 
-	f.Fuzz(func(t *testing.T, in string) {
-		c := filter.NewConverter(filter.WithArrayDriver(pq.Array))
+	f.Fuzz(func(t *testing.T, in string, jsonb bool) {
+		options := []filter.Option{
+			filter.WithArrayDriver(pq.Array),
+		}
+		if jsonb {
+			options = append(options, filter.WithNestedJSONB("meta"))
+		}
+		c := filter.NewConverter(options...)
 		conditions, _, err := c.Convert([]byte(in), 1)
 		if err == nil && conditions != "" {
 			j, err := pg_query.ParseToJSON("SELECT * FROM test WHERE 1 AND " + conditions)
 			if err != nil {
 				t.Fatalf("%q %q %v", in, conditions, err)
 			}
 
+			t.Log(j)
+
+			var q struct {
+				Stmts []struct {
+					Stmt struct {
+						SelectStmt struct {
+							FromClause []struct {
+								RangeVar struct {
+									Relname string `json:"relname"`
+								} `json:"RangeVar"`
+							} `json:"fromClause"`
+
+							WhereClause struct {
+								BoolExpr struct {
+									Boolop string `json:"boolop"`
+									Args   []any  `json:"args"`
+								} `json:"BoolExpr"`
+							} `json:"whereClause"`
+						} `json:"SelectStmt"`
+					} `json:"stmt"`
+				} `json:"stmts"`
+			}
+			if err := json.Unmarshal([]byte(j), &q); err != nil {
+				t.Fatal(err)
+			}
+			if len(q.Stmts) != 1 {
+				t.Fatal(conditions, "len(q.Stmts) != 1")
+			}
+			if len(q.Stmts[0].Stmt.SelectStmt.FromClause) != 1 {
+				t.Fatal(conditions, "len(q.Stmts[0].Stmt.SelectStmt.FromClause) != 1")
+			}
+			if q.Stmts[0].Stmt.SelectStmt.FromClause[0].RangeVar.Relname != "test" {
+				t.Fatal(conditions, "q.Stmts[0].Stmt.SelectStmt.FromClause[0].RangeVar.Relname != test")
+			}
+			if q.Stmts[0].Stmt.SelectStmt.WhereClause.BoolExpr.Boolop != "AND_EXPR" {
+				t.Fatal(conditions, "q.Stmts[0].Stmt.SelectStmt.WhereClause.BoolExpr.Boolop != AND_EXPR")
+			}
+			if len(q.Stmts[0].Stmt.SelectStmt.WhereClause.BoolExpr.Args) != 2 {
+				t.Fatal(conditions, "len(q.Stmts[0].Stmt.SelectStmt.WhereClause.BoolExpr.Args) != 2")
+			}
 			if strings.Contains(j, "CommentStmt") {
 				t.Fatal(conditions, "CommentStmt found")
 			}