Add String method to Genji Table

db.go

@@ -1,6 +1,7 @@
 package genji
 
 import (
+	"bytes"
 	"fmt"
 
 	"github.com/asdine/genji/engine"
@@ -350,3 +351,42 @@ func (t Table) RenameField(oldName, newName string) error {
 	t.schema.Fields.Replace(oldName, sf)
 	return t.schemas.Replace(t.name, t.schema)
 }
+
+// String displays the table as a csv compatible string.
+func (t Table) String() string {
+	var buf bytes.Buffer
+
+	if t.schema != nil {
+		fmt.Fprintf(&buf, "%s\n", t.schema.String())
+	}
+
+	err := t.Iterate(func(rowid []byte, r record.Record) error {
+		first := true
+		err := r.Iterate(func(f field.Field) error {
+			if !first {
+				buf.WriteString(", ")
+			}
+			first = false
+
+			v, err := field.Decode(f)
+			if t.schema != nil {
+				fmt.Fprintf(&buf, "%#v", v)
+			} else {
+				fmt.Fprintf(&buf, "%s(%s): %#v", f.Name, f.Type, v)
+			}
+			return err
+		})
+		if err != nil {
+			return err
+		}
+
+		fmt.Fprintf(&buf, "\n")
+		return nil
+	})
+
+	if err != nil {
+		return err.Error()
+	}
+
+	return buf.String()
+}

db_test.go

@@ -1,6 +1,7 @@
 package genji_test
 
 import (
+	"fmt"
 	"testing"
 
 	"github.com/asdine/genji"
@@ -74,3 +75,61 @@ func TestTable(t *testing.T) {
 		require.NoError(t, err)
 	})
 }
+
+func TestTableString(t *testing.T) {
+	tests := []struct {
+		name       string
+		withSchema bool
+		expected   string
+	}{
+		{"No schema", false, `name(String): "John 0", age(Int): 10
+name(String): "John 1", age(Int): 11
+name(String): "John 2", age(Int): 12
+`},
+		{"With schema", true, `name(String), age(Int)
+"John 0", 10
+"John 1", 11
+"John 2", 12
+`},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			db, err := genji.New(memory.NewEngine())
+			require.NoError(t, err)
+
+			err = db.Update(func(tx *genji.Tx) error {
+				if test.withSchema {
+					err := tx.CreateTableWithSchema("test", &record.Schema{
+						Fields: []field.Field{
+							{Name: "name", Type: field.String},
+							{Name: "age", Type: field.Int},
+						},
+					})
+					require.NoError(t, err)
+				} else {
+					err := tx.CreateTable("test")
+					require.NoError(t, err)
+				}
+
+				tb, err := tx.Table("test")
+				require.NoError(t, err)
+
+				for i := 0; i < 3; i++ {
+					rowid, err := tb.Insert(record.FieldBuffer([]field.Field{
+						field.NewString("name", fmt.Sprintf("John %d", i)),
+						field.NewInt("age", 10+i),
+					}))
+					require.NoError(t, err)
+					require.NotNil(t, rowid)
+				}
+
+				s := tb.(*genji.Table).String()
+				require.Equal(t, test.expected, s)
+				return nil
+			})
+			require.NoError(t, err)
+
+		})
+	}
+}

record/schema.go

@@ -77,7 +77,7 @@ func (s *Schema) Equal(other *Schema) bool {
 func (s *Schema) String() string {
 	var b strings.Builder
 	for i, f := range s.Fields {
-		b.WriteString(f.Name + ":" + f.Type.String())
+		b.WriteString(f.Name + "(" + f.Type.String() + ")")
 		if i+1 < len(s.Fields) {
 			b.WriteString(", ")
 		}