The code: ```cpp EXPECT_OK(encryptStream.init(encCreds, 0, ENC_BLOCK_SIZE)); ``` likely performs the following: 1. **`encryptStream.init(...)`**: ...

The code:

EXPECT_OK(encryptStream.init(encCreds, 0, ENC_BLOCK_SIZE));

likely performs the following:

1. encryptStream.init(...):

   • It is calling the init method of the encryptStream object, which is likely an instance of a stream encryption class.

   • The init method is initializing the encryption stream with specific parameters.

   • encCreds: This is likely credentials or configuration required for encryption (such as a key or algorithm details).

   • 0: This might represent a mode, an offset, or a specific identifier for initialization.

   • ENC_BLOCK_SIZE: This is probably a constant that defines the size of encryption blocks.

2. EXPECT_OK(...):

   • This is likely a macro or function from a testing framework (e.g., Google Test or a similar framework).
   • It checks that the return value of encryptStream.init(...) indicates success. For example, EXPECT_OK might verify that the operation did not result in an error.

In summary:

The code initializes the encryptStream object with the provided credentials, offset (or mode), and block size, then verifies through a test assertion (EXPECT_OK) that the initialization succeeded without errors. If initialization fails, this would cause the test to fail.