net.urllib: keep the query parameter order (#13405)

vlib/net/urllib/urllib_test.v

@@ -40,8 +40,14 @@ fn test_parse_query() ? {
 	q2 := urllib.parse_query('format="%l:+%c+%t"') ?
 	// dump(q1)
 	// dump(q2)
-	assert q1.data['format'].data == ['"%l: %c %t"']
-	assert q2.data['format'].data == ['"%l: %c %t"']
+	assert q1.get('format') == '"%l: %c %t"'
+	assert q2.get('format') == '"%l: %c %t"'
+}
+
+fn test_parse_query_orders() ? {
+	query_one := urllib.parse_query('https://someapi.com/endpoint?gamma=zalibaba&tau=1&alpha=alibaba&signature=alibaba123') ?
+	qvalues := query_one.values()
+	assert qvalues == ['zalibaba', '1', 'alibaba', 'alibaba123']
 }
 
 fn test_parse_missing_host() ? {
@@ -49,3 +55,46 @@ fn test_parse_missing_host() ? {
 	url := urllib.parse('http:///') ?
 	assert url.str() == 'http://///'
 }
+
+// testing the case where the key as a null value
+// e.g ?key=
+fn test_parse_none_value() ? {
+	query_one := urllib.parse_query('gamma=zalibaba&tau=1&alpha=alibaba&signature=') ?
+	qvalues := query_one.values()
+	qvalues_map := query_one.to_map()
+	assert qvalues == ['zalibaba', '1', 'alibaba']
+	assert qvalues_map == {
+		'gamma':     ['zalibaba']
+		'tau':       ['1']
+		'alpha':     ['alibaba']
+		'signature': ['']
+	}
+}
+
+// testing the case where the query as empity value
+// e.g https://www.vlang.dev?alibaba
+fn test_parse_empty_query_one() ? {
+	query_str := 'alibaba'
+	query_one := urllib.parse_query(query_str) ?
+	qvalues := query_one.values()
+	qvalues_map := query_one.to_map()
+	query_encode := query_one.encode()
+	assert qvalues == []
+	assert qvalues_map == {
+		'alibaba': ['']
+	}
+	assert query_str == query_encode
+}
+
+// testing the case where the query as empity value
+// e.g https://www.vlang.dev?
+fn test_parse_empty_query_two() ? {
+	query_str := ''
+	query_one := urllib.parse_query(query_str) ?
+	qvalues := query_one.values()
+	qvalues_map := query_one.to_map()
+	query_encode := query_one.encode()
+	assert qvalues == []
+	assert qvalues_map == {}
+	assert query_str == query_encode
+}