Initial project import

tools/v/vlib/builtin/hex_test.v

@@ -0,0 +1,30 @@
+fn test_hex_methods_on_u8() {
+	assert u8(1).hex() == '01'
+	assert u8(` `).hex() == '20'
+	assert u8(255).hex() == 'ff'
+}
+
+fn test_hex_methods_on_byte() {
+	assert byte(1).hex() == '01'
+	assert byte(` `).hex() == '20'
+	assert byte(255).hex() == 'ff'
+}
+
+fn test_hex_methods_on_char() {
+	assert char(1).hex() == '01'
+	assert char(` `).hex() == '20'
+	assert char(255).hex() == 'ff'
+}
+
+fn test_hex_method_on_runes() {
+	assert ` `.hex() == '20'
+	assert `喂`.hex() == '5582'
+	// latin:
+	assert `A`.hex() == '41'
+	assert `Z`.hex() == '5a'
+	// cyrillic:
+	assert `Д`.hex() == '414'
+	assert `Я`.hex() == '42f'
+	// emojies:
+	assert `💣`.hex() == '1f4a3'
+}