Crate nextest_metadata

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This crate contains deserializers for machine-readable output generated by cargo-nextest.

Implemented so far:


Get the list of tests in the repository:

// This example requires `cargo nextest` to be installed.

use nextest_metadata::ListCommand;

let command = ListCommand::new();
let test_list = command.exec().unwrap();

// The result is a TestListSummary.
println!("{:?}", test_list);

Minimum supported Rust version (MSRV)

The minimum supported Rust version is Rust 1.64.

While this crate is a pre-release (0.x.x) it may have its MSRV bumped in a patch release. Once a crate has reached 1.x, any MSRV bump will be accompanied with a new minor version.

Minimum supported cargo-nextest version

The “minimum supported cargo-nextest version” is cargo-nextest 0.9.15.

For more about nextest-metadata’s stability policy, see the Stability page on the nextest site.


A serializable suite of test binaries.
Command builder for cargo nextest list.
A unique identifier for a test suite (a Rust binary).
Rust metadata used for builds and test runs.
Information about the kind of a Rust non-test binary.
A non-test Rust binary. Used to set the correct environment variables in reused builds.
Information about the kind of a Rust test binary.
A serializable Rust test binary.
Serializable information about an individual test case within a Rust test suite.
Information about whether a test suite was listed or skipped.
A serializable suite of tests within a Rust test binary.
Root element for a serializable list of tests generated by nextest.


The platform a binary was built on (useful for cross-compilation)
An error that occurs while running a cargo nextest command.
An enum describing whether a test matches a filter.
The reason for why a test doesn’t match a filter.
Documented exit codes for cargo nextest failures.
The name and kind of a Rust binary, present within a RustBinaryId.