added attribute encoding test cases

attribute_test.go

@@ -0,0 +1,82 @@
+package ipp
+
+import (
+	"bytes"
+	"testing"
+)
+
+var attributeTestCases = []struct {
+	Attribute string
+	Value     interface{}
+	Bytes     []byte
+}{
+	{
+		Attribute: "job-id",
+		Value:     1,
+		Bytes:     []byte{33, 0, 6, 106, 111, 98, 45, 105, 100, 0, 4, 0, 0, 0, 1},
+	},
+	{
+		Attribute: "printer-is-shared",
+		Value:     false,
+		Bytes:     []byte{34, 0, 17, 112, 114, 105, 110, 116, 101, 114, 45, 105, 115, 45, 115, 104, 97, 114, 101, 100, 0, 1, 0},
+	},
+	{
+		Attribute: "purge-jobs",
+		Value:     true,
+		Bytes:     []byte{34, 0, 10, 112, 117, 114, 103, 101, 45, 106, 111, 98, 115, 0, 1, 1},
+	},
+	{
+		Attribute: "printer-uri",
+		Value:     "ipp://myserver:631/printers/myprinter",
+		Bytes:     []byte{69, 0, 11, 112, 114, 105, 110, 116, 101, 114, 45, 117, 114, 105, 0, 37, 105, 112, 112, 58, 47, 47, 109, 121, 115, 101, 114, 118, 101, 114, 58, 54, 51, 49, 47, 112, 114, 105, 110, 116, 101, 114, 115, 47, 109, 121, 112, 114, 105, 110, 116, 101, 114},
+	},
+	{
+		Attribute: "attributes-charset",
+		Value:     "utf-8",
+		Bytes:     []byte{71, 0, 18, 97, 116, 116, 114, 105, 98, 117, 116, 101, 115, 45, 99, 104, 97, 114, 115, 101, 116, 0, 5, 117, 116, 102, 45, 56},
+	},
+}
+
+func TestAttributeEncoding(t *testing.T) {
+	buf := new(bytes.Buffer)
+	enc := NewAttributeEncoder(buf)
+
+	for _, c := range attributeTestCases {
+		if err := enc.Encode(c.Attribute, c.Value); err != nil {
+			t.Errorf("error while encoding attribute %s with value %v: %v", c.Attribute, c.Value, err)
+		}
+
+		result := buf.Bytes()
+		if !bytes.Equal(result, c.Bytes) {
+			t.Errorf("encoding result is not correct, expected %v, got %v", c.Bytes, result)
+		}
+
+		buf.Reset()
+	}
+}
+
+func TestAttributeDecoder(t *testing.T) {
+	buf := new(bytes.Buffer)
+	dec := NewAttributeDecoder(buf)
+
+	for _, c := range attributeTestCases {
+		tag := Tag(c.Bytes[:1][0])
+
+		buf.Write(c.Bytes[1:])
+
+		attr, err := dec.Decode(tag)
+		if err != nil {
+			t.Errorf("error while decoding bytes %v: %v", c.Bytes, err)
+		}
+
+		if attr.Name != c.Attribute {
+			t.Errorf("decoded attribute is not correct, expected %v, got %v", c.Attribute, attr.Name)
+		}
+
+		if attr.Value != c.Value {
+			t.Errorf("decoded value is not correct, expected %v, got %v", c.Attribute, attr.Name)
+		}
+
+		buf.Reset()
+	}
+}