public void DecryptJsonAsyncThrowsWhenCryptoIsNull()
{
var json = "{\"foo\":\"ImFiYyI=\",\"bar\":\"MTIz\",\"baz\":\"dHJ1ZQ==\",\"qux\":\"WzEsMiwzXQ==\",\"garply\":\"eyJncmF1bHQiOiJ4eXoifQ==\",\"fred\":\"bnVsbA==\"}";
var keyIdentifier = new object();
ICrypto crypto = null;
Assert.That(async() => await crypto.DecryptJsonAsync(json, new[] { "$.foo", "$.bar", "$.baz", "$.qux", "$.garply", "$.fred" }, keyIdentifier), Throws.ArgumentNullException);
}
/// <summary>
/// Asynchronously decrypts the fields, specified by JSONPath, that are contained in the given json document string.
/// </summary>
/// <param name="crypto">
/// The instance of <see cref="ICrypto"/> that ultimately responsible for performing decryption operations
/// on field values.
/// </param>
/// <param name="jsonString">A string containing an json document.</param>
/// <param name="jsonPathToDecrypt">The JSONPath of the field to decrypt.</param>
/// <param name="credentialName">
/// The name of the credential to use for this encryption operation,
/// or null to use the default credential.
/// </param>
/// <param name="cancellationToken">The token to monitor for cancellation requests.</param>
/// <returns>A task that will contain the same json document, except with the specified fields decrypted.</returns>
public static Task <string> DecryptJsonAsync(this ICrypto crypto, string jsonString, string jsonPathToDecrypt, string credentialName = null, CancellationToken cancellationToken = default(CancellationToken)) =>
crypto.DecryptJsonAsync(jsonString, new[] { jsonPathToDecrypt }, credentialName, cancellationToken);