Update coders with error return values

encoding/ascii.go

@@ -0,0 +1,14 @@
+package encoding
+
+import "bytes"
+
+type ASCIICoder struct{}
+
+func (c *ASCIICoder) Encode(s string, buf *bytes.Buffer) error {
+	buf.WriteString(s)
+	return nil
+}
+
+func (c *ASCIICoder) Decode(buf *bytes.Buffer) (string, error) {
+	return buf.String(), nil
+}

encoding/ascii_test.go

@@ -0,0 +1,74 @@
+package encoding
+
+import (
+	"bytes"
+	"testing"
+)
+
+func TestASCIIEncodeSimpleASCIIString(t *testing.T) {
+	coder := &ASCIICoder{}
+	var buf bytes.Buffer
+	input := "Hello, World!"
+
+	expected := []byte{72, 101, 108, 108, 111, 44, 32, 87, 111, 114, 108, 100, 33}
+	err := coder.Encode(input, &buf)
+
+	if err != nil {
+		t.Errorf("Expected no error, but got %v", err)
+	}
+
+	if !bytes.Equal(buf.Bytes(), expected) {
+		t.Errorf("Expected %v, but got %v", expected, buf.Bytes())
+	}
+}
+
+func TestASCIIDecodeSimpleASCIIString(t *testing.T) {
+	coder := &ASCIICoder{}
+	var buf bytes.Buffer
+	input := []byte{72, 101, 108, 108, 111, 44, 32, 87, 111, 114, 108, 100, 33}
+
+	expected := "Hello, World!"
+	buf.Write(input)
+	output, err := coder.Decode(&buf)
+
+	if err != nil {
+		t.Errorf("Expected no error, but got %v", err)
+	}
+
+	if output != expected {
+		t.Errorf("Expected %v, but got %v", expected, output)
+	}
+}
+
+func TestASCIIEncodeEmptyString(t *testing.T) {
+	coder := &ASCIICoder{}
+	var buf bytes.Buffer
+	input := ""
+
+	expected := []byte{}
+	err := coder.Encode(input, &buf)
+
+	if err != nil {
+		t.Errorf("Expected no error, but got %v", err)
+	}
+
+	if !bytes.Equal(buf.Bytes(), expected) {
+		t.Errorf("Expected %v, but got %v", expected, buf.Bytes())
+	}
+}
+
+func TestASCIIDecodeEmptyString(t *testing.T) {
+	coder := &ASCIICoder{}
+	buf := bytes.NewBuffer([]byte{})
+
+	expected := ""
+	output, err := coder.Decode(buf)
+
+	if err != nil {
+		t.Errorf("Expected no error, but got %v", err)
+	}
+
+	if output != expected {
+		t.Errorf("Expected %v, but got %v", expected, output)
+	}
+}

encoding/charset.json

@@ -0,0 +1,5 @@
+{
+	"ucs2": {
+		"link": "http://www.columbia.edu/kermit/ucs2.html"
+	}
+}

encoding/coder.go

@@ -0,0 +1,8 @@
+package encoding
+
+import "bytes"
+
+type Coder interface {
+	Encode(s string, buf *bytes.Buffer) error
+	Decode(buf *bytes.Buffer) (string, error)
+}

encoding/gsm7.go

@@ -0,0 +1,18 @@
+package encoding
+
+import (
+	"bytes"
+	"log"
+)
+
+type GSM7Coder struct{}
+
+func (c *GSM7Coder) Encode(s string, buf *bytes.Buffer) {
+	utf8 := []byte(s)
+	log.Println(utf8)
+	buf.Write(utf8)
+}
+
+func (c *GSM7Coder) Decode(buf *bytes.Buffer) string {
+	return buf.String()
+}

encoding/gsm7_test.go

@@ -0,0 +1,58 @@
+package encoding
+
+import (
+	"bytes"
+	"testing"
+)
+
+func TestGSM7EncodeSimpleASCIIString(t *testing.T) {
+	coder := &GSM7Coder{}
+	var buf bytes.Buffer
+	input := "Sunshine"
+
+	expected := []byte{0b11010011, 0b10111001, 0b10111011, 0b10001110, 0b01001110, 0b10111011, 0b11001011}
+	coder.Encode(input, &buf)
+
+	if !bytes.Equal(buf.Bytes(), expected) {
+		t.Errorf("Expected %v, but got %v", expected, buf.Bytes())
+	}
+}
+
+func TestGSM7DecodeSimpleASCIIString(t *testing.T) {
+	coder := &GSM7Coder{}
+	var buf bytes.Buffer
+	input := []byte{0b11010011, 0b10111001, 0b10111011, 0b10001110, 0b01001110, 0b10111011, 0b11001011}
+
+	expected := "Sunshine"
+	buf.Write(input)
+	output := coder.Decode(&buf)
+
+	if output != expected {
+		t.Errorf("Expected %v, but got %v", expected, output)
+	}
+}
+
+func TestGSM7EncodeEmptyString(t *testing.T) {
+	coder := &GSM7Coder{}
+	var buf bytes.Buffer
+	input := ""
+
+	expected := []byte{}
+	coder.Encode(input, &buf)
+
+	if !bytes.Equal(buf.Bytes(), expected) {
+		t.Errorf("Expected %v, but got %v", expected, buf.Bytes())
+	}
+}
+
+func TestGSM7DecodeEmptyString(t *testing.T) {
+	coder := &GSM7Coder{}
+	buf := bytes.NewBuffer([]byte{})
+
+	expected := ""
+	output := coder.Decode(buf)
+
+	if output != expected {
+		t.Errorf("Expected %v, but got %v", expected, output)
+	}
+}

encoding/ucs2.go

@@ -0,0 +1,13 @@
+package encoding
+
+import "bytes"
+
+type UCS2Coder struct{}
+
+func (c *UCS2Coder) Encode(s string, buf *bytes.Buffer) {
+	panic("UCS2 not implemented yet")
+}
+
+func (c *UCS2Coder) Decode(buf *bytes.Buffer) string {
+	panic("UCS2 not implemented yet")
+}