Fix libwasmvm tests for windows and check it in CI

.circleci/config.yml

@@ -1,5 +1,8 @@
 version: 2.1
 
+orbs:
+  win: circleci/[email protected]
+
 jobs:
   # All checks on the codebase that can run in parallel to build_shared_library
   libwasmvm_sanity:
@@ -182,6 +185,28 @@ jobs:
           command: make test-safety
       - run: make build-go
 
+  rust-unit-tests-windows:
+    executor:
+      name: win/default
+      shell: powershell.exe
+    environment:
+      CARGO_NET_GIT_FETCH_WITH_CLI: "true"
+    steps:
+      - checkout
+      - run:
+          name: Install Rustup
+          command: choco install rustup.install --checksum 79442f66a969a504febda49ee9158a90ad9e94913209ccdca3c22ef86d635c31 --checksum64 2220DDB49FEA0E0945B1B5913E33D66BD223A67F19FD1C116BE0318DE7ED9D9C
+      - run:
+          name: Install Rust
+          command: rustup default 1.59.0
+      - run:
+          name: Show Rust version information
+          command: rustc --version; cargo --version; rustup --version
+      - run:
+          name: Run unit tests
+          working_directory: libwasmvm
+          command: cargo test
+
   test_alpine_build:
     machine:
       image: ubuntu-2004:202101-01
@@ -283,6 +308,7 @@ workflows:
       - tidy-go
       - format-scripts
       - lint-scripts
+      - rust-unit-tests-windows
       - build_shared_library:
           filters: # required since other jobs with tag filters require this one
             tags:

libwasmvm/Cargo.toml

@@ -34,6 +34,8 @@ thiserror = "1.0"
 hex = "0.4"
 
 [dev-dependencies]
+assert_approx_eq = "1.1.0"
+cfg-if = "1.0.0"
 serde = { version = "1.0.103", default-features = false, features = ["derive"] }
 tempfile = "3.1.0"
 

libwasmvm/src/cache.rs

@@ -371,7 +371,13 @@ mod tests {
         assert!(cache_ptr.is_null());
         assert!(error_msg.is_some());
         let msg = String::from_utf8(error_msg.consume().unwrap()).unwrap();
-        assert_eq!(msg, "Error calling the VM: Cache error: Error creating directory broken\u{0}dir/state: data provided contains a nul byte");
+        cfg_if::cfg_if! {
+            if #[cfg(windows)] {
+                assert_eq!(msg, "Error calling the VM: Cache error: Error creating directory broken\u{0}dir\\state: strings passed to WinAPI cannot contain NULs");
+            } else {
+                assert_eq!(msg, "Error calling the VM: Cache error: Error creating directory broken\u{0}dir/state: data provided contains a nul byte");
+            }
+        }
     }
 
     #[test]
@@ -693,18 +699,17 @@ mod tests {
         let mut error_msg = UnmanagedVector::default();
         let metrics = get_metrics(cache_ptr, Some(&mut error_msg));
         let _ = error_msg.consume();
-        assert_eq!(
-            metrics,
-            Metrics {
-                hits_pinned_memory_cache: 0,
-                hits_memory_cache: 0,
-                hits_fs_cache: 1,
-                misses: 0,
-                elements_pinned_memory_cache: 1,
-                elements_memory_cache: 0,
-                size_pinned_memory_cache: 5665691,
-                size_memory_cache: 0,
-            }
+        assert_eq!(metrics.hits_pinned_memory_cache, 0);
+        assert_eq!(metrics.hits_memory_cache, 0);
+        assert_eq!(metrics.hits_fs_cache, 1);
+        assert_eq!(metrics.misses, 0);
+        assert_eq!(metrics.elements_pinned_memory_cache, 1);
+        assert_eq!(metrics.elements_memory_cache, 0);
+        assert_eq!(metrics.size_memory_cache, 0);
+        assert_approx_eq::assert_approx_eq!(
+            i128::from(metrics.size_pinned_memory_cache),
+            5665691,
+            665691
         );
 
         // Unpin