1 files changed, 79 insertions, 0 deletions
diff --git a/components/script/dom/testworkletglobalscope.rs b/components/script/dom/testworkletglobalscope.rs
new file mode 100644
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+++ b/components/script/dom/testworkletglobalscope.rs
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+use crate::dom::bindings::cell::DomRefCell;
+use crate::dom::bindings::codegen::Bindings::TestWorkletGlobalScopeBinding;
+use crate::dom::bindings::codegen::Bindings::TestWorkletGlobalScopeBinding::TestWorkletGlobalScopeMethods;
+use crate::dom::bindings::root::DomRoot;
+use crate::dom::bindings::str::DOMString;
+use crate::dom::worklet::WorkletExecutor;
+use crate::dom::workletglobalscope::WorkletGlobalScope;
+use crate::dom::workletglobalscope::WorkletGlobalScopeInit;
+use crate::script_runtime::JSContext;
+use crossbeam_channel::Sender;
+use dom_struct::dom_struct;
+use js::rust::Runtime;
+use msg::constellation_msg::PipelineId;
+use servo_url::ServoUrl;
+use std::collections::HashMap;
+
+// check-tidy: no specs after this line
+
+#[dom_struct]
+pub struct TestWorkletGlobalScope {
+    // The worklet global for this object
+    worklet_global: WorkletGlobalScope,
+    // The key/value pairs
+    lookup_table: DomRefCell<HashMap<String, String>>,
+}
+
+impl TestWorkletGlobalScope {
+    #[allow(unsafe_code)]
+    pub fn new(
+        runtime: &Runtime,
+        pipeline_id: PipelineId,
+        base_url: ServoUrl,
+        executor: WorkletExecutor,
+        init: &WorkletGlobalScopeInit,
+    ) -> DomRoot<TestWorkletGlobalScope> {
+        debug!(
+            "Creating test worklet global scope for pipeline {}.",
+            pipeline_id
+        );
+        let global = Box::new(TestWorkletGlobalScope {
+            worklet_global: WorkletGlobalScope::new_inherited(
+                pipeline_id,
+                base_url,
+                executor,
+                init,
+            ),
+            lookup_table: Default::default(),
+        });
+        unsafe { TestWorkletGlobalScopeBinding::Wrap(JSContext::from_ptr(runtime.cx()), global) }
+    }
+
+    pub fn perform_a_worklet_task(&self, task: TestWorkletTask) {
+        match task {
+            TestWorkletTask::Lookup(key, sender) => {
+                debug!("Looking up key {}.", key);
+                let result = self.lookup_table.borrow().get(&key).cloned();
+                let _ = sender.send(result);
+            },
+        }
+    }
+}
+
+impl TestWorkletGlobalScopeMethods for TestWorkletGlobalScope {
+    fn RegisterKeyValue(&self, key: DOMString, value: DOMString) {
+        debug!("Registering test worklet key/value {}/{}.", key, value);
+        self.lookup_table
+            .borrow_mut()
+            .insert(String::from(key), String::from(value));
+    }
+}
+
+/// Tasks which can be performed by test worklets.
+pub enum TestWorkletTask {
+    Lookup(String, Sender<Option<String>>),
+}