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parser_test.go
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parser_test.go
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package toml
import (
"strconv"
"strings"
"testing"
"github.com/pelletier/go-toml/v2/internal/ast"
"github.com/stretchr/testify/require"
)
//nolint:funlen
func TestParser_AST_Numbers(t *testing.T) {
examples := []struct {
desc string
input string
kind ast.Kind
err bool
}{
{
desc: "integer just digits",
input: `1234`,
kind: ast.Integer,
},
{
desc: "integer zero",
input: `0`,
kind: ast.Integer,
},
{
desc: "integer sign",
input: `+99`,
kind: ast.Integer,
},
{
desc: "integer hex uppercase",
input: `0xDEADBEEF`,
kind: ast.Integer,
},
{
desc: "integer hex lowercase",
input: `0xdead_beef`,
kind: ast.Integer,
},
{
desc: "integer octal",
input: `0o01234567`,
kind: ast.Integer,
},
{
desc: "integer binary",
input: `0b11010110`,
kind: ast.Integer,
},
{
desc: "float zero",
input: `0.0`,
kind: ast.Float,
},
{
desc: "float positive zero",
input: `+0.0`,
kind: ast.Float,
},
{
desc: "float negative zero",
input: `-0.0`,
kind: ast.Float,
},
{
desc: "float pi",
input: `3.1415`,
kind: ast.Float,
},
{
desc: "float negative",
input: `-0.01`,
kind: ast.Float,
},
{
desc: "float signed exponent",
input: `5e+22`,
kind: ast.Float,
},
{
desc: "float exponent lowercase",
input: `1e06`,
kind: ast.Float,
},
{
desc: "float exponent uppercase",
input: `-2E-2`,
kind: ast.Float,
},
{
desc: "float fractional with exponent",
input: `6.626e-34`,
kind: ast.Float,
},
{
desc: "float underscores",
input: `224_617.445_991_228`,
kind: ast.Float,
},
{
desc: "inf",
input: `inf`,
kind: ast.Float,
},
{
desc: "inf negative",
input: `-inf`,
kind: ast.Float,
},
{
desc: "inf positive",
input: `+inf`,
kind: ast.Float,
},
{
desc: "nan",
input: `nan`,
kind: ast.Float,
},
{
desc: "nan negative",
input: `-nan`,
kind: ast.Float,
},
{
desc: "nan positive",
input: `+nan`,
kind: ast.Float,
},
}
for _, e := range examples {
e := e
t.Run(e.desc, func(t *testing.T) {
p := parser{}
p.Reset([]byte(`A = ` + e.input))
p.NextExpression()
err := p.Error()
if e.err {
require.Error(t, err)
} else {
require.NoError(t, err)
expected := astNode{
Kind: ast.KeyValue,
Children: []astNode{
{Kind: e.kind, Data: []byte(e.input)},
{Kind: ast.Key, Data: []byte(`A`)},
},
}
compareNode(t, expected, p.Expression())
}
})
}
}
type (
astNode struct {
Kind ast.Kind
Data []byte
Children []astNode
}
)
func compareNode(t *testing.T, e astNode, n *ast.Node) {
t.Helper()
require.Equal(t, e.Kind, n.Kind)
require.Equal(t, e.Data, n.Data)
compareIterator(t, e.Children, n.Children())
}
func compareIterator(t *testing.T, expected []astNode, actual ast.Iterator) {
t.Helper()
idx := 0
for actual.Next() {
n := actual.Node()
if idx >= len(expected) {
t.Fatal("extra child in actual tree")
}
e := expected[idx]
compareNode(t, e, n)
idx++
}
if idx < len(expected) {
t.Fatal("missing children in actual", "idx =", idx, "expected =", len(expected))
}
}
//nolint:funlen
func TestParser_AST(t *testing.T) {
examples := []struct {
desc string
input string
ast astNode
err bool
}{
{
desc: "simple string assignment",
input: `A = "hello"`,
ast: astNode{
Kind: ast.KeyValue,
Children: []astNode{
{
Kind: ast.String,
Data: []byte(`hello`),
},
{
Kind: ast.Key,
Data: []byte(`A`),
},
},
},
},
{
desc: "simple bool assignment",
input: `A = true`,
ast: astNode{
Kind: ast.KeyValue,
Children: []astNode{
{
Kind: ast.Bool,
Data: []byte(`true`),
},
{
Kind: ast.Key,
Data: []byte(`A`),
},
},
},
},
{
desc: "array of strings",
input: `A = ["hello", ["world", "again"]]`,
ast: astNode{
Kind: ast.KeyValue,
Children: []astNode{
{
Kind: ast.Array,
Children: []astNode{
{
Kind: ast.String,
Data: []byte(`hello`),
},
{
Kind: ast.Array,
Children: []astNode{
{
Kind: ast.String,
Data: []byte(`world`),
},
{
Kind: ast.String,
Data: []byte(`again`),
},
},
},
},
},
{
Kind: ast.Key,
Data: []byte(`A`),
},
},
},
},
{
desc: "array of arrays of strings",
input: `A = ["hello", "world"]`,
ast: astNode{
Kind: ast.KeyValue,
Children: []astNode{
{
Kind: ast.Array,
Children: []astNode{
{
Kind: ast.String,
Data: []byte(`hello`),
},
{
Kind: ast.String,
Data: []byte(`world`),
},
},
},
{
Kind: ast.Key,
Data: []byte(`A`),
},
},
},
},
{
desc: "inline table",
input: `name = { first = "Tom", last = "Preston-Werner" }`,
ast: astNode{
Kind: ast.KeyValue,
Children: []astNode{
{
Kind: ast.InlineTable,
Children: []astNode{
{
Kind: ast.KeyValue,
Children: []astNode{
{Kind: ast.String, Data: []byte(`Tom`)},
{Kind: ast.Key, Data: []byte(`first`)},
},
},
{
Kind: ast.KeyValue,
Children: []astNode{
{Kind: ast.String, Data: []byte(`Preston-Werner`)},
{Kind: ast.Key, Data: []byte(`last`)},
},
},
},
},
{
Kind: ast.Key,
Data: []byte(`name`),
},
},
},
},
}
for _, e := range examples {
e := e
t.Run(e.desc, func(t *testing.T) {
p := parser{}
p.Reset([]byte(e.input))
p.NextExpression()
err := p.Error()
if e.err {
require.Error(t, err)
} else {
require.NoError(t, err)
compareNode(t, e.ast, p.Expression())
}
})
}
}
func BenchmarkParseBasicStringWithUnicode(b *testing.B) {
p := &parser{}
b.Run("4", func(b *testing.B) {
input := []byte(`"\u1234\u5678\u9ABC\u1234\u5678\u9ABC"`)
b.ReportAllocs()
b.SetBytes(int64(len(input)))
for i := 0; i < b.N; i++ {
p.parseBasicString(input)
}
})
b.Run("8", func(b *testing.B) {
input := []byte(`"\u12345678\u9ABCDEF0\u12345678\u9ABCDEF0"`)
b.ReportAllocs()
b.SetBytes(int64(len(input)))
for i := 0; i < b.N; i++ {
p.parseBasicString(input)
}
})
}
func BenchmarkParseBasicStringsEasy(b *testing.B) {
p := &parser{}
for _, size := range []int{1, 4, 8, 16, 21} {
b.Run(strconv.Itoa(size), func(b *testing.B) {
input := []byte(`"` + strings.Repeat("A", size) + `"`)
b.ReportAllocs()
b.SetBytes(int64(len(input)))
for i := 0; i < b.N; i++ {
p.parseBasicString(input)
}
})
}
}
func TestParser_AST_DateTimes(t *testing.T) {
examples := []struct {
desc string
input string
kind ast.Kind
err bool
}{
{
desc: "offset-date-time with delim 'T' and UTC offset",
input: `2021-07-21T12:08:05Z`,
kind: ast.DateTime,
},
{
desc: "offset-date-time with space delim and +8hours offset",
input: `2021-07-21 12:08:05+08:00`,
kind: ast.DateTime,
},
{
desc: "local-date-time with nano second",
input: `2021-07-21T12:08:05.666666666`,
kind: ast.LocalDateTime,
},
{
desc: "local-date-time",
input: `2021-07-21T12:08:05`,
kind: ast.LocalDateTime,
},
{
desc: "local-date",
input: `2021-07-21`,
kind: ast.LocalDate,
},
}
for _, e := range examples {
e := e
t.Run(e.desc, func(t *testing.T) {
p := parser{}
p.Reset([]byte(`A = ` + e.input))
p.NextExpression()
err := p.Error()
if e.err {
require.Error(t, err)
} else {
require.NoError(t, err)
expected := astNode{
Kind: ast.KeyValue,
Children: []astNode{
{Kind: e.kind, Data: []byte(e.input)},
{Kind: ast.Key, Data: []byte(`A`)},
},
}
compareNode(t, expected, p.Expression())
}
})
}
}