public void FromBase64_ReturnsExpectedBytes(string content, byte[] expectedResult)
        {
            // Arrange
            var filter = new TestVerifySignatureFilter();

            // Act
            var result = filter.FromBase64Public(content, "Some-Header");

            // Assert
            Assert.Equal(expectedResult, result);
        }
        public void FromBase64_ReturnsNullIfInputInvalid(string content)
        {
            // Arrange
            var filter = new TestVerifySignatureFilter();

            // Act
            var result = filter.FromBase64Public(content, "Some-Header");

            // Assert
            Assert.Null(result);
        }