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use std::fs::File;
use std::io::Read;
use std::path::PathBuf;
use std::{slice, str};
use toml::Table;
use rustls_ffi::rustls_version;
/// Test that the output of `rustls_version()` matches what we expect based on Cargo.toml state.
///
/// In particular this ensures that the Rustls version reported in the rustls-ffi version string
/// matches the version of the Rustls dependency that rustls-ffi was built with.
///
/// If this test starts to fail, you probably forgot to update `RUSTLS_CRATE_VERSION` in
/// `build.rs`.
#[cfg_attr(miri, ignore)] // Requires file I/O
#[test]
fn rustls_version_match() {
// Parse Cargo.toml as a generic TOML Table.
let mut metadata_file =
File::open(PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("Cargo.toml"))
.expect("failed to open Cargo.toml");
let mut metadata_content = String::new();
metadata_file
.read_to_string(&mut metadata_content)
.expect("failed to read Cargo.toml");
let metadata = metadata_content.parse::<Table>().unwrap();
// Find the crate version specified in Cargo.toml
let package_metadata = metadata["package"]
.as_table()
.expect("missing package metadata");
let crate_version = package_metadata["version"]
.as_str()
.expect("missing crate version");
// Find the rustls dependency version specified in Cargo.toml
let deps = metadata["dependencies"].as_table().unwrap();
let rustls_dep = &deps["rustls"];
let rustls_dep_version = match rustls_dep.as_table() {
// Handle the `rustls = { version = "x.y.z", ... }` case
Some(table) => table["version"].as_str(),
// Handle the `rustls = "x.y.z"` case
None => rustls_dep.as_str(),
}
.expect("missing rustls dependency version");
// Assert that rustls_version() returns a string of the form:
// $CRATE_NAME/$CRATE_VERSION/rustls/$RUSTLS_VERSION
// E.g.:
// rustls-ffi/0.13.0/rustls/0.23.4
let rustls_ffi_version = rustls_version();
let rustls_ffi_version = unsafe {
str::from_utf8_unchecked(slice::from_raw_parts(
rustls_ffi_version.data as *const u8,
rustls_ffi_version.len,
))
};
let rustls_ffi_version_parts = rustls_ffi_version.split('/').collect::<Vec<_>>();
assert_eq!(
rustls_ffi_version_parts,
vec![
env!("CARGO_PKG_NAME"),
crate_version,
"rustls",
rustls_dep_version,
]
);
}
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