Add test for Instance, fix tests for ImportObject

CHANGELOG.md

@@ -6,6 +6,7 @@ Blocks of changes will separated by version increments.
 
 ## **[Unreleased]**
 
+- [#807](https://github.com/wasmerio/wasmer/pull/807) Implement Send for `Instance`, breaking change on `ImportObject`, remove method `get_namespace` replaced with `with_namespace` and `maybe_with_namespace`
 - [#790](https://github.com/wasmerio/wasmer/pull/790) Fix flaky test failure with LLVM, switch to large code model.
 - [#788](https://github.com/wasmerio/wasmer/pull/788) Use union merge on the changelog file.
 - [#785](https://github.com/wasmerio/wasmer/pull/785) Include Apache license file for spectests.

lib/runtime-core/src/import.rs

@@ -266,12 +266,14 @@ mod test {
 
         imports1.extend(imports2);
 
-        let cat_ns = imports1.get_namespace("cat").unwrap();
-        assert!(cat_ns.get_export("small").is_some());
+        let small_cat_export =
+            imports1.maybe_with_namespace("cat", |cat_ns| cat_ns.get_export("small"));
+        assert!(small_cat_export.is_some());
 
-        let dog_ns = imports1.get_namespace("dog").unwrap();
-        assert!(dog_ns.get_export("happy").is_some());
-        assert!(dog_ns.get_export("small").is_some());
+        let entries = imports1.maybe_with_namespace("dog", |dog_ns| {
+            Some((dog_ns.get_export("happy")?, dog_ns.get_export("small")?))
+        });
+        assert!(entries.is_some());
     }
 
     #[test]
@@ -289,14 +291,14 @@ mod test {
         };
 
         imports1.extend(imports2);
-        let dog_ns = imports1.get_namespace("dog").unwrap();
+        let happy_dog_entry = imports1
+            .maybe_with_namespace("dog", |dog_ns| dog_ns.get_export("happy"))
+            .unwrap();
 
-        assert!(
-            if let Export::Global(happy_dog_global) = dog_ns.get_export("happy").unwrap() {
+        assert!(if let Export::Global(happy_dog_global) = happy_dog_entry {
             happy_dog_global.get() == Value::I32(4)
         } else {
             false
-            }
-        );
+        });
     }
 }

lib/runtime-core/src/instance.rs

@@ -752,3 +752,15 @@ impl<'a> DynFunc<'a> {
         }
     }
 }
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    fn is_send<T: Send>() {}
+
+    #[test]
+    fn test_instance_is_send() {
+        is_send::<Instance>();
+    }
+}