1 files changed, 75 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/decorators/field-decorators.js b/js/src/jit-test/tests/decorators/field-decorators.js
new file mode 100644
index 0000000000..3db9da534c
--- /dev/null
+++ b/js/src/jit-test/tests/decorators/field-decorators.js
@@ -0,0 +1,75 @@
+// |jit-test| skip-if: !getBuildConfiguration()['decorators']
+
+load(libdir + "asserts.js");
+
+let dec1Called = false;
+let dec2Called = false;
+
+// This explicitly tests the case where undefined is returned.
+function dec1(value, context) {
+  dec1Called = true;
+  // returns undefined
+}
+
+function dec2(value, context) {
+  dec2Called = true;
+  return (initialValue) => 2;
+}
+
+function dec3(value, context) {
+  return (initialValue) => initialValue*2;
+}
+
+function checkDecoratorContext(kind, isPrivate, isStatic, name) {
+  return (value, context) => {
+    assertEq(value, undefined);
+    assertEq(context.kind, kind);
+    assertEq(typeof context.access, "object");
+    assertEq(context.private, isPrivate);
+    assertEq(context.static, isStatic);
+    assertEq(context.name, name);
+    assertEq(typeof context.addInitializer, "object");
+  }
+}
+
+class C {
+  @dec1 x;
+  @dec1 x2 = 1;
+  @checkDecoratorContext("field", false, false, "x3") x3;
+  @checkDecoratorContext("field", false, true, "x4") static x4;
+  @checkDecoratorContext("field", true, false, "#x5") #x5;
+  @dec2 x6;
+  @dec3 x7 = 1;
+  @dec2 @dec3 x8 = 1;
+  @dec2 static x9;
+  @dec2 #x10;
+  getX10 = () => {
+    return this.#x10;
+  };
+  @dec3 #x11 = 2;
+  getX11 = () => {
+    return this.#x11;
+  };
+  @dec1 42 = 1;
+  @dec2 [43];
+}
+
+
+let c = new C();
+assertEq(dec1Called, true);
+assertEq(c.x2, 1);
+assertEq(dec2Called, true);
+assertEq(c.x6, 2);
+assertEq(c.x7, 2);
+assertEq(c.x8, 4);
+assertEq(c.x9, 2);
+assertEq(c.getX10(), 2);
+assertEq(c.getX11(), 4);
+assertEq(c[42], 1);
+assertEq(c[43], 2);
+
+assertThrowsInstanceOf(() => {
+  class D {
+    @(() => { return "hello!"; }) f(x) { return x; }
+  }
+}, TypeError), "Returning a value other than undefined or a callable throws.";