Removed TextEncoder and BinaryEncoder

Restructured / fixed a lot of tests along the way.

pgtype/pgtype_test.go

@@ -2,17 +2,13 @@ package pgtype_test
 
 import (
 	"bytes"
-	"context"
 	"database/sql"
 	"errors"
-	"fmt"
 	"net"
-	"reflect"
 	"testing"
 
 	"github.com/jackc/pgx/v5"
 	"github.com/jackc/pgx/v5/pgtype"
-	"github.com/jackc/pgx/v5/pgtype/testutil"
 	_ "github.com/jackc/pgx/v5/stdlib"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -292,54 +288,8 @@ func BenchmarkScanPlanScanInt4IntoGoInt32(b *testing.B) {
 	}
 }
 
-type PgxTranscodeTestCase struct {
-	src  interface{}
-	dst  interface{}
-	test func(interface{}) bool
-}
-
 func isExpectedEq(a interface{}) func(interface{}) bool {
 	return func(v interface{}) bool {
 		return a == v
 	}
 }
-
-func testPgxCodec(t testing.TB, pgTypeName string, tests []PgxTranscodeTestCase) {
-	conn := testutil.MustConnectPgx(t)
-	defer testutil.MustCloseContext(t, conn)
-
-	formats := []struct {
-		name string
-		code int16
-	}{
-		{name: "TextFormat", code: pgx.TextFormatCode},
-		{name: "BinaryFormat", code: pgx.BinaryFormatCode},
-	}
-
-	for _, format := range formats {
-		testPgxCodecFormat(t, pgTypeName, tests, conn, format.name, format.code)
-	}
-}
-
-func testPgxCodecFormat(t testing.TB, pgTypeName string, tests []PgxTranscodeTestCase, conn *pgx.Conn, formatName string, formatCode int16) {
-	_, err := conn.Prepare(context.Background(), "test", fmt.Sprintf("select $1::%s", pgTypeName))
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	for i, tt := range tests {
-		err := conn.QueryRow(context.Background(), "test", pgx.QueryResultFormats{formatCode}, tt.src).Scan(tt.dst)
-		if err != nil {
-			t.Errorf("%s %d: %v", formatName, i, err)
-		}
-
-		dst := reflect.ValueOf(tt.dst)
-		if dst.Kind() == reflect.Ptr {
-			dst = dst.Elem()
-		}
-
-		if !tt.test(dst.Interface()) {
-			t.Errorf("%s %d: unexpected result for %v: %v", formatName, i, tt.src, dst.Interface())
-		}
-	}
-}