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package rdfloader
import (
"bufio"
"bytes"
"io"
"strings"
"testing"
)
func xmlreaderFromString(fileContent string) XMLReader {
return XMLReaderFromFileObject(bufio.NewReader(io.Reader(bytes.NewReader([]byte(fileContent)))))
}
func TestXMLReader_ignoreWhiteSpace(t *testing.T) {
// string starting with 4 blank characters.
fileContent1 := "\n \r\tsample string"
// string without any blank space at the start.
fileContent2 := "sample string"
// new reader with above string which starts with blank chars.
xmlReader1 := xmlreaderFromString(fileContent1)
// reader for string without any blank char at start
xmlReader2 := xmlreaderFromString(fileContent2)
// Test Case 1
nWS, err := xmlReader1.ignoreWhiteSpace()
if err != nil {
t.Error(err)
}
if nWS != 4 {
t.Errorf("ignored %v spaces, expected it to ignore %v spaces", nWS, 4)
}
// Test Case 2
nWS, err = xmlReader2.ignoreWhiteSpace()
if err != nil {
t.Error(err)
}
if nWS != 0 {
t.Errorf("ignored %v spaces, expected it to ignore %v spaces", nWS, 0)
}
}
func TestXMLReader_peekARune(t *testing.T) {
testCases := []string{
"string - alphabets",
"123456 - numbers",
"@#$%%^ - non-alphanumeric chars",
}
for _, testCase := range testCases {
xmlReader := xmlreaderFromString(testCase)
r, err := xmlReader.peekARune()
if err != nil {
t.Error(err)
} else if expected := rune(testCase[0]); r != expected {
t.Errorf("Expected %v, Found %v", expected, r)
}
}
// testing if the function returns an error upon eof
xmlReader := xmlreaderFromString("")
_, err := xmlReader.peekARune()
if err == nil {
t.Error("expected function to raise an error")
}
}
func TestXMLReader_peekNBytes(t *testing.T) {
type TestCase struct {
input string
numberChars int
output []byte
err error
}
testCases := []TestCase{
TestCase{"string", 3, []byte("str"), nil},
TestCase{"string", 6, []byte("string"), nil},
TestCase{"string", 0, []byte{}, nil},
TestCase{"string", 7, []byte("string"), io.EOF},
}
for _, testCase := range testCases {
xmlReader := xmlreaderFromString(testCase.input)
nBytes, err := xmlReader.peekNBytes(testCase.numberChars)
if bytes.Compare(nBytes, testCase.output) != 0 {
t.Errorf("Expected %v, Found %v", string(nBytes), string(testCase.output))
}
if err != testCase.err {
t.Errorf("expected to raise %v error", testCase.err)
}
}
}
func TestXMLReader_readARune(t *testing.T) {
type TestCase struct {
input string
numberChars int
output []byte
err error
}
testCases := []TestCase{
TestCase{"string", 3, []byte("str"), nil},
TestCase{"string", 6, []byte("string"), nil},
TestCase{"string", 0, []byte{}, nil},
TestCase{"string", 7, []byte("string"), io.EOF},
}
for _, testCase := range testCases {
xmlReader := xmlreaderFromString(testCase.input)
nBytes, err := xmlReader.peekNBytes(testCase.numberChars)
if bytes.Compare(nBytes, testCase.output) != 0 {
t.Errorf("Expected %v, Found %v", string(nBytes), string(testCase.output))
}
if err != testCase.err {
t.Errorf("expected to raise %v error", testCase.err)
}
}
}
func TestXMLReader_readNBytes(t *testing.T) {
xmlReader := xmlreaderFromString("string")
op, err := xmlReader.readNBytes(4)
if err != nil {
t.Errorf("unexpected error: %v", err)
}
if bytes.Compare(op, []byte("stri")) != 0 {
t.Errorf("Expected: %v, Found: %v", "stri", string(op))
}
}
func TestXMLReader_readTill(t *testing.T) {
xmlReader := xmlreaderFromString("hello world")
op, err := xmlReader.readTill(1 << ' ')
if string(op) != "hello" {
t.Errorf("Expected %v, Found: %v", "hello", string(op))
}
// next character must be a space.
// That is, delimiter mustn't be consumed while reading.
r, err := xmlReader.readARune()
if err != nil {
t.Error(err)
}
if r != ' ' {
t.Errorf("Expected %v, Found %v", ' ', r)
}
}
func TestXMLReader_readTillString(t *testing.T) {
// TestCase 1: searching in an empty file must raise an eof error
xmlReader := xmlreaderFromString("")
_, err := xmlReader.readTillString("any string")
if err == nil {
t.Error("expected an eof error")
}
// TestCase 2: searching in a file with delimiter at the end.
// it shouldn't raise any error.
delimiter := "example"
fileContent := delimiter
xmlReader = xmlreaderFromString(fileContent)
output, err := xmlReader.readTillString(delimiter)
if err != nil {
t.Errorf("unexpected error %v", err)
}
if len(output) > 0 {
t.Error("expected output to be empty as the file didn't had any chars before the delimiter")
}
// TestCase 3: delimiter not in the file must return an empty output with an eof error.
fileContent = "sample content"
delimiter = "delim"
xmlReader = xmlreaderFromString(fileContent)
output, err = xmlReader.readTillString(delimiter)
if err == nil {
t.Error("expected an eof error finding delimiter")
}
if len(output) > 0 {
t.Errorf("output should be empty when the delimiter is not found which ran into an error. found %v", output)
}
// TestCase 4: Valid case: delimiter present in the string.
delimiter = "delimiter"
fileContent = "some random chars" + delimiter
xmlReader = xmlreaderFromString(fileContent)
output, _ = xmlReader.readTillString(delimiter)
expected := strings.Split(fileContent, delimiter)[0]
if string(output) != expected {
t.Errorf("faulty parsing. expected: %s, found: %s", expected, string(output))
}
}
|
