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package coding
import (
"errors"
"io"
"testing"
"github.com/dromara/dongle/internal/mock"
"github.com/stretchr/testify/assert"
)
func TestDecoder_FromString(t *testing.T) {
t.Run("from string", func(t *testing.T) {
decoder := NewDecoder().FromString("hello world")
assert.Equal(t, []byte("hello world"), decoder.src)
assert.Equal(t, decoder, decoder)
})
t.Run("from empty string", func(t *testing.T) {
decoder := NewDecoder().FromString("")
assert.Equal(t, []byte{}, decoder.src)
assert.Equal(t, decoder, decoder)
})
t.Run("from unicode string", func(t *testing.T) {
decoder := NewDecoder().FromString("你好世界")
assert.Equal(t, []byte("你好世界"), decoder.src)
assert.Equal(t, decoder, decoder)
})
t.Run("from large string", func(t *testing.T) {
largeString := "Hello, World! " + string(make([]byte, 1000))
decoder := NewDecoder().FromString(largeString)
assert.Equal(t, []byte(largeString), decoder.src)
assert.Equal(t, decoder, decoder)
})
}
func TestDecoder_FromBytes(t *testing.T) {
t.Run("from bytes", func(t *testing.T) {
data := []byte{0x00, 0x01, 0x02, 0x03}
decoder := NewDecoder().FromBytes(data)
assert.Equal(t, data, decoder.src)
assert.Equal(t, decoder, decoder)
})
t.Run("from empty bytes", func(t *testing.T) {
decoder := NewDecoder().FromBytes([]byte{})
assert.Equal(t, []byte{}, decoder.src)
assert.Equal(t, decoder, decoder)
})
t.Run("from nil bytes", func(t *testing.T) {
decoder := NewDecoder().FromBytes(nil)
assert.Nil(t, decoder.src)
assert.Equal(t, decoder, decoder)
})
t.Run("from large bytes", func(t *testing.T) {
largeData := make([]byte, 1000)
for i := range largeData {
largeData[i] = byte(i % 256)
}
decoder := NewDecoder().FromBytes(largeData)
assert.Equal(t, largeData, decoder.src)
assert.Equal(t, decoder, decoder)
})
t.Run("from binary data", func(t *testing.T) {
binaryData := []byte{0x00, 0x01, 0x02, 0x03, 0xFF, 0xFE, 0xFD, 0xFC}
decoder := NewDecoder().FromBytes(binaryData)
assert.Equal(t, binaryData, decoder.src)
assert.Equal(t, decoder, decoder)
})
}
func TestDecoder_FromFile(t *testing.T) {
t.Run("from file", func(t *testing.T) {
file := mock.NewFile([]byte("hello world"), "test.txt")
defer file.Close()
decoder := NewDecoder().FromFile(file)
assert.Equal(t, file, decoder.reader)
assert.Equal(t, decoder, decoder)
})
t.Run("from empty file", func(t *testing.T) {
file := mock.NewFile([]byte{}, "empty.txt")
defer file.Close()
decoder := NewDecoder().FromFile(file)
assert.Equal(t, file, decoder.reader)
assert.Equal(t, decoder, decoder)
})
t.Run("from error file", func(t *testing.T) {
errorFile := mock.NewErrorFile(errors.New("read error"))
decoder := NewDecoder().FromFile(errorFile)
assert.Equal(t, errorFile, decoder.reader)
assert.Equal(t, decoder, decoder)
})
t.Run("from large file", func(t *testing.T) {
largeData := make([]byte, 1000)
for i := range largeData {
largeData[i] = byte(i % 256)
}
file := mock.NewFile(largeData, "large.txt")
defer file.Close()
decoder := NewDecoder().FromFile(file)
assert.Equal(t, file, decoder.reader)
assert.Equal(t, decoder, decoder)
})
}
func TestDecoder_ToString(t *testing.T) {
t.Run("to string with data", func(t *testing.T) {
decoder := NewDecoder()
decoder.dst = []byte("hello world")
result := decoder.ToString()
assert.Equal(t, "hello world", result)
})
t.Run("to string with empty data", func(t *testing.T) {
decoder := NewDecoder()
decoder.dst = []byte{}
result := decoder.ToString()
assert.Equal(t, "", result)
})
t.Run("to string with nil data", func(t *testing.T) {
decoder := NewDecoder()
decoder.dst = nil
result := decoder.ToString()
assert.Equal(t, "", result)
})
t.Run("to string with unicode data", func(t *testing.T) {
decoder := NewDecoder()
decoder.dst = []byte("你好世界")
result := decoder.ToString()
assert.Equal(t, "你好世界", result)
})
t.Run("to string with binary data", func(t *testing.T) {
decoder := NewDecoder()
decoder.dst = []byte{0x00, 0x01, 0x02, 0x03}
result := decoder.ToString()
assert.Equal(t, string([]byte{0x00, 0x01, 0x02, 0x03}), result)
})
}
func TestDecoder_ToBytes(t *testing.T) {
t.Run("to bytes with data", func(t *testing.T) {
decoder := NewDecoder()
decoder.dst = []byte("hello world")
result := decoder.ToBytes()
assert.Equal(t, []byte("hello world"), result)
})
t.Run("to bytes with empty data", func(t *testing.T) {
decoder := NewDecoder()
decoder.dst = []byte{}
result := decoder.ToBytes()
assert.Equal(t, []byte(""), result)
})
t.Run("to bytes with nil data", func(t *testing.T) {
decoder := NewDecoder()
decoder.dst = nil
result := decoder.ToBytes()
assert.Equal(t, []byte(""), result)
})
t.Run("to bytes with unicode data", func(t *testing.T) {
decoder := NewDecoder()
decoder.dst = []byte("你好世界")
result := decoder.ToBytes()
assert.Equal(t, []byte("你好世界"), result)
})
t.Run("to bytes with binary data", func(t *testing.T) {
decoder := NewDecoder()
decoder.dst = []byte{0x00, 0x01, 0x02, 0x03}
result := decoder.ToBytes()
assert.Equal(t, []byte{0x00, 0x01, 0x02, 0x03}, result)
})
t.Run("to bytes with large data", func(t *testing.T) {
largeData := make([]byte, 1000)
for i := range largeData {
largeData[i] = byte(i % 256)
}
decoder := NewDecoder()
decoder.dst = largeData
result := decoder.ToBytes()
assert.Equal(t, largeData, result)
})
}
func TestDecoder_stream(t *testing.T) {
t.Run("success with data", func(t *testing.T) {
data := []byte("hello decode stream")
file := mock.NewFile(data, "d.txt")
defer file.Close()
decoder := NewDecoder().FromFile(file)
out, err := decoder.stream(func(r io.Reader) io.Reader {
return r
})
assert.NoError(t, err)
assert.Equal(t, data, out)
})
t.Run("empty reader returns empty", func(t *testing.T) {
file := mock.NewFile([]byte{}, "empty.txt")
defer file.Close()
decoder := NewDecoder().FromFile(file)
out, err := decoder.stream(func(r io.Reader) io.Reader { return r })
assert.NoError(t, err)
assert.Equal(t, []byte{}, out)
})
t.Run("decoder read error", func(t *testing.T) {
readErr := errors.New("read error")
errReader := mock.NewErrorReadWriteCloser(readErr)
decoder := NewDecoder()
decoder.reader = errReader
out, err := decoder.stream(func(r io.Reader) io.Reader { return errReader })
assert.Error(t, err)
assert.Contains(t, err.Error(), "read error")
assert.Equal(t, []byte{}, out)
})
}
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