Thomas Pelletier
80 lines
1.5 KiB
Go
80 lines
1.5 KiB
Go
package unsafe_test
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import (
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"testing"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"github.com/pelletier/go-toml/v2/internal/unsafe"
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)
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func TestUnsafeSubsliceOffsetValid(t *testing.T) {
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examples := []struct {
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desc string
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test func() ([]byte, []byte)
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offset int
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}{
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{
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desc: "simple",
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test: func() ([]byte, []byte) {
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data := []byte("hello")
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return data, data[1:]
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},
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offset: 1,
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},
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}
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for _, e := range examples {
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t.Run(e.desc, func(t *testing.T) {
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d, s := e.test()
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offset := unsafe.SubsliceOffset(d, s)
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assert.Equal(t, e.offset, offset)
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})
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}
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}
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func TestUnsafeSubsliceOffsetInvalid(t *testing.T) {
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examples := []struct {
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desc string
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test func() ([]byte, []byte)
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}{
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{
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desc: "unrelated arrays",
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test: func() ([]byte, []byte) {
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return []byte("one"), []byte("two")
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},
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},
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{
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desc: "slice starts before data",
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test: func() ([]byte, []byte) {
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full := []byte("hello world")
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return full[5:], full[1:]
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},
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},
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{
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desc: "slice starts after data",
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test: func() ([]byte, []byte) {
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full := []byte("hello world")
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return full[:3], full[5:]
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},
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},
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{
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desc: "slice ends after data",
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test: func() ([]byte, []byte) {
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full := []byte("hello world")
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return full[:5], full[3:8]
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},
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},
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}
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for _, e := range examples {
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t.Run(e.desc, func(t *testing.T) {
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d, s := e.test()
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require.Panics(t, func() {
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unsafe.SubsliceOffset(d, s)
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})
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})
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}
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}
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