chore: add tests for context api

packages/core/tests/context_api.rs

@@ -0,0 +1,51 @@
+use dioxus::core::{ElementId, Mutation::*};
+use dioxus::prelude::*;
+
+#[test]
+fn state_shares() {
+    fn app(cx: Scope) -> Element {
+        cx.provide_context(cx.generation() as i32);
+
+        cx.render(rsx!(child_1 {}))
+    }
+
+    fn child_1(cx: Scope) -> Element {
+        cx.render(rsx!(child_2 {}))
+    }
+
+    fn child_2(cx: Scope) -> Element {
+        let value = cx.consume_context::<i32>().unwrap();
+        cx.render(rsx!("Value is {value}"))
+    }
+
+    let mut dom = VirtualDom::new(app);
+    assert_eq!(
+        dom.rebuild().santize().edits,
+        [
+            CreateTextNode { value: "Value is 0", id: ElementId(1,) },
+            AppendChildren { m: 1 },
+        ]
+    );
+
+    dom.mark_dirty_scope(ScopeId(0));
+    dom.render_immediate();
+    assert_eq!(dom.base_scope().consume_context::<i32>().unwrap(), 1);
+
+    dom.mark_dirty_scope(ScopeId(0));
+    dom.render_immediate();
+    assert_eq!(dom.base_scope().consume_context::<i32>().unwrap(), 2);
+
+    dom.mark_dirty_scope(ScopeId(2));
+    assert_eq!(
+        dom.render_immediate().santize().edits,
+        [SetText { value: "Value is 2", id: ElementId(1,) },]
+    );
+
+    dom.mark_dirty_scope(ScopeId(0));
+    dom.mark_dirty_scope(ScopeId(2));
+    let edits = dom.render_immediate();
+    assert_eq!(
+        edits.santize().edits,
+        [SetText { value: "Value is 3", id: ElementId(1,) },]
+    );
+}