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#!/usr/bin/env python
""""Core serialization tests."""
import tempfile
import os
import cv2 as cv
import numpy as np
from tests_common import NewOpenCVTests
class persistence_test(NewOpenCVTests):
def test_yml_rw(self):
fd, fname = tempfile.mkstemp(prefix="opencv_python_persistence_", suffix=".yml")
os.close(fd)
# Writing ...
expected = np.array([[[0, 1, 2, 3, 4]]])
expected_str = ("Hello", "World", "!")
fs = cv.FileStorage(fname, cv.FILE_STORAGE_WRITE)
fs.write("test", expected)
fs.write("strings", expected_str)
fs.release()
# Reading ...
fs = cv.FileStorage(fname, cv.FILE_STORAGE_READ)
root = fs.getFirstTopLevelNode()
self.assertEqual(root.name(), "test")
test = fs.getNode("test")
self.assertEqual(test.empty(), False)
self.assertEqual(test.name(), "test")
self.assertEqual(test.type(), cv.FILE_NODE_MAP)
self.assertEqual(test.isMap(), True)
actual = test.mat()
self.assertEqual(actual.shape, expected.shape)
self.assertEqual(np.array_equal(expected, actual), True)
strings = fs.getNode("strings")
self.assertEqual(strings.isSeq(), True)
self.assertEqual(strings.size(), len(expected_str))
self.assertEqual(all(strings.at(i).isString() for i in range(strings.size())), True)
self.assertSequenceEqual([strings.at(i).string() for i in range(strings.size())], expected_str)
fs.release()
os.remove(fname)
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