Use the solc version required in tests rather than one on PATH

crates/solc-binaries/src/lib.rs

@@ -7,6 +7,7 @@ use std::path::{Path, PathBuf};
 
 use cache::get_or_download;
 use download::SolcDownloader;
+use semver::Version;
 
 use revive_dt_common::types::VersionOrRequirement;
 
@@ -14,6 +15,25 @@ pub mod cache;
 pub mod download;
 pub mod list;
 
+/// Return a [`SolcDownloader`] which can be used to download a `solc`
+/// binary or return the resolved version it will download.
+async fn downloader(
+    version: impl Into<VersionOrRequirement>,
+    wasm: bool,
+) -> anyhow::Result<SolcDownloader> {
+    if wasm {
+        SolcDownloader::wasm(version).await
+    } else if cfg!(target_os = "linux") {
+        SolcDownloader::linux(version).await
+    } else if cfg!(target_os = "macos") {
+        SolcDownloader::macosx(version).await
+    } else if cfg!(target_os = "windows") {
+        SolcDownloader::windows(version).await
+    } else {
+        unimplemented!()
+    }
+}
+
 /// Downloads the solc binary for Wasm is `wasm` is set, otherwise for
 /// the target platform.
 ///
@@ -24,17 +44,16 @@ pub async fn download_solc(
     version: impl Into<VersionOrRequirement>,
     wasm: bool,
 ) -> anyhow::Result<PathBuf> {
-    let downloader = if wasm {
-        SolcDownloader::wasm(version).await
-    } else if cfg!(target_os = "linux") {
-        SolcDownloader::linux(version).await
-    } else if cfg!(target_os = "macos") {
-        SolcDownloader::macosx(version).await
-    } else if cfg!(target_os = "windows") {
-        SolcDownloader::windows(version).await
-    } else {
-        unimplemented!()
-    }?;
-
+    let downloader = downloader(version, wasm).await?;
     get_or_download(cache_directory, &downloader).await
 }
+
+/// Return the version of solc that will be downloaded via [`download_solc`]
+/// given the version requirements and wasm flag.
+pub async fn solc_version(
+    version: impl Into<VersionOrRequirement>,
+    wasm: bool,
+) -> anyhow::Result<Version> {
+    let downloader = downloader(version, wasm).await?;
+    Ok(downloader.version.clone())
+}