Merge pull request RustPython#2736 from fanninpm/test-xdrlib

Add test_xdrlib from CPython 3.8

Author: youknowone

Lib/test/test_xdrlib.py

@@ -0,0 +1,81 @@
+import unittest
+
+import xdrlib
+
+class XDRTest(unittest.TestCase):
+
+    def test_xdr(self):
+        p = xdrlib.Packer()
+
+        s = b'hello world'
+        a = [b'what', b'is', b'hapnin', b'doctor']
+
+        p.pack_int(42)
+        p.pack_int(-17)
+        p.pack_uint(9)
+        p.pack_bool(True)
+        p.pack_bool(False)
+        p.pack_uhyper(45)
+        p.pack_float(1.9)
+        p.pack_double(1.9)
+        p.pack_string(s)
+        p.pack_list(range(5), p.pack_uint)
+        p.pack_array(a, p.pack_string)
+
+        # now verify
+        data = p.get_buffer()
+        up = xdrlib.Unpacker(data)
+
+        self.assertEqual(up.get_position(), 0)
+
+        self.assertEqual(up.unpack_int(), 42)
+        self.assertEqual(up.unpack_int(), -17)
+        self.assertEqual(up.unpack_uint(), 9)
+        self.assertTrue(up.unpack_bool() is True)
+
+        # remember position
+        pos = up.get_position()
+        self.assertTrue(up.unpack_bool() is False)
+
+        # rewind and unpack again
+        up.set_position(pos)
+        self.assertTrue(up.unpack_bool() is False)
+
+        self.assertEqual(up.unpack_uhyper(), 45)
+        self.assertAlmostEqual(up.unpack_float(), 1.9)
+        self.assertAlmostEqual(up.unpack_double(), 1.9)
+        self.assertEqual(up.unpack_string(), s)
+        self.assertEqual(up.unpack_list(up.unpack_uint), list(range(5)))
+        self.assertEqual(up.unpack_array(up.unpack_string), a)
+        up.done()
+        self.assertRaises(EOFError, up.unpack_uint)
+
+class ConversionErrorTest(unittest.TestCase):
+
+    def setUp(self):
+        self.packer = xdrlib.Packer()
+
+    def assertRaisesConversion(self, *args):
+        self.assertRaises(xdrlib.ConversionError, *args)
+
+    def test_pack_int(self):
+        self.assertRaisesConversion(self.packer.pack_int, 'string')
+
+    def test_pack_uint(self):
+        self.assertRaisesConversion(self.packer.pack_uint, 'string')
+
+    # TODO: RUSTPYTHON
+    @unittest.expectedFailure
+    def test_float(self):
+        self.assertRaisesConversion(self.packer.pack_float, 'string')
+
+    # TODO: RUSTPYTHON
+    @unittest.expectedFailure
+    def test_double(self):
+        self.assertRaisesConversion(self.packer.pack_double, 'string')
+
+    def test_uhyper(self):
+        self.assertRaisesConversion(self.packer.pack_uhyper, 'string')
+
+if __name__ == "__main__":
+    unittest.main()