tests: add rustls_version() integration test

This uses a dev-dependency on `toml` to parse `Cargo.toml`, matching
pieces of metadata found there with expected values from calling
`rustls_version()`.

Notably this will help catch a failure to keep the `build.rs`
`RUSTLS_CRATE_VERSION` constant in-sync with the Rustls dependency in
`Cargo.toml`.

1 files changed, 89 insertions, 0 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 3d8c25c..641872b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -94,6 +94,22 @@ dependencies = [
 ]
 
 [[package]]
+name = "hashbrown"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
+
+[[package]]
+name = "indexmap"
+version = "1.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bd070e393353796e801d209ad339e89596eb4c8d430d18ede6a1cced8fafbd99"
+dependencies = [
+ "autocfg",
+ "hashbrown",
+]
+
+[[package]]
 name = "jni"
 version = "0.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -132,6 +148,15 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f665ee40bc4a3c5590afb1e9677db74a508659dfd71e126420da8274909a0167"
 
 [[package]]
+name = "nom8"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ae01545c9c7fc4486ab7debaf2aad7003ac19431791868fb2e8066df97fad2f8"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
 name = "num-bigint"
 version = "0.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -260,6 +285,7 @@ dependencies = [
  "rustls-pki-types",
  "rustls-platform-verifier",
  "rustls-webpki",
+ "toml",
 ]
 
 [[package]]
@@ -378,6 +404,35 @@ dependencies = [
 ]
 
 [[package]]
+name = "serde"
+version = "1.0.203"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7253ab4de971e72fb7be983802300c30b5a7f0c2e56fab8abfc6a214307c0094"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.203"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "500cbc0ebeb6f46627f50f3f5811ccf6bf00643be300b4c3eabc0ef55dc5b5ba"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "serde_spanned"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2c68e921cef53841b8925c2abadd27c9b891d9613bdc43d6b823062866df38e8"
+dependencies = [
+ "serde",
+]
+
+[[package]]
 name = "spin"
 version = "0.9.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -421,6 +476,40 @@ dependencies = [
 ]
 
 [[package]]
+name = "toml"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4fb9d890e4dc9298b70f740f615f2e05b9db37dce531f6b24fb77ac993f9f217"
+dependencies = [
+ "serde",
+ "serde_spanned",
+ "toml_datetime",
+ "toml_edit",
+]
+
+[[package]]
+name = "toml_datetime"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4553f467ac8e3d374bc9a177a26801e5d0f9b211aa1673fb137a403afd1c9cf5"
+dependencies = [
+ "serde",
+]
+
+[[package]]
+name = "toml_edit"
+version = "0.18.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "56c59d8dd7d0dcbc6428bf7aa2f0e823e26e43b3c9aca15bbc9475d23e5fa12b"
+dependencies = [
+ "indexmap",
+ "nom8",
+ "serde",
+ "serde_spanned",
+ "toml_datetime",
+]
+
+[[package]]
 name = "unicode-ident"
 version = "1.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"