Tests are failing to build

[perigoso]

Tests are failing to compile with the latest upstream and release v1.0.0

Noticed the issue while updating the ArchLinux AUR packages, it happens on both the latest upstream with unlocked cargo fetch and with the release sources with cargo fetch --locked, compiled with cargo build --frozen --release --all-features, and tests run with cargo test --frozen --all-features.

running 2 tests
test src/error.rs - error::ErrorKind::error (line 51) ... FAILED
test src/error.rs - error::ErrorKind::error_from (line 63) ... FAILED

failures:

---- src/error.rs - error::ErrorKind::error (line 51) stdout ----
error[E0433]: failed to resolve: use of undeclared type `ErrorKind`
 --> src/error.rs:52:12
  |
3 | return Err(ErrorKind::DeviceNotFound.error());
  |            ^^^^^^^^^ use of undeclared type `ErrorKind`
  |
help: consider importing one of these enums
  |
2 + use std::io::ErrorKind;
  |
2 + use bmputil::error::ErrorKind;
  |
2 + use clap::error::ErrorKind;
  |

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0433`.
Couldn't compile the test.
---- src/error.rs - error::ErrorKind::error_from (line 63) stdout ----
error[E0433]: failed to resolve: use of undeclared type `ErrorKind`
 --> src/error.rs:65:25
  |
4 | operation().map_err(|e| ErrorKind::DeviceNotFound.error_from(e))?;
  |                         ^^^^^^^^^ use of undeclared type `ErrorKind`
  |
help: consider importing one of these enums
  |
2 + use std::io::ErrorKind;
  |
2 + use bmputil::error::ErrorKind;
  |
2 + use clap::error::ErrorKind;
  |

error[E0599]: no method named `map_err` found for struct `futures_io::Error` in the current scope
 --> src/error.rs:65:13
  |
4 | operation().map_err(|e| ErrorKind::DeviceNotFound.error_from(e))?;
  |             ^^^^^^^ method not found in `futures_io::Error`

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0433, E0599.
For more information about an error, try `rustc --explain E0433`.
Couldn't compile the test.

failures:
    src/error.rs - error::ErrorKind::error (line 51)
    src/error.rs - error::ErrorKind::error_from (line 63)

test result: FAILED. 0 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.12s

error: doctest failed, to rerun pass `--doc`

[dragonmux]

There are some comments in error.rs it looks like that are being interpreted as tests, and thus the failures.. the comment texts need reviewing to fix this.