Add m-esr52 at 52.6.0

1 files changed, 42 insertions, 0 deletions

diff --git a/js/src/tests/js1_8_5/reflect-parse/newTarget.js b/js/src/tests/js1_8_5/reflect-parse/newTarget.js
new file mode 100644
index 000000000..3db2c2726
--- /dev/null
+++ b/js/src/tests/js1_8_5/reflect-parse/newTarget.js
@@ -0,0 +1,42 @@
+// |reftest| skip-if(!xulRuntime.shell)
+function testNewTarget() {
+
+    // new.target is currently valid inside any non-arrow, non-generator function
+    assertInFunctionExpr("new.target", newTarget());
+
+    // even with gratuitous whitespace.
+    assertInFunctionExpr(`new.
+                            target`, newTarget());
+
+    // invalid in top-level scripts
+    assertError("new.target", SyntaxError);
+
+    // valid in arrow functions inside functions
+    assertInFunctionExpr("()=>new.target", arrowExpr([], newTarget()));
+    assertError("(() => new.target))", SyntaxError);
+
+    // valid in generators, too!
+    assertStmt("function *foo() { new.target; }", genFunDecl("es6", ident("foo"), [],
+               blockStmt([exprStmt(newTarget())])));
+
+    // new.target is a member expression. You should be able to call, invoke, or
+    // access properties of it.
+    assertInFunctionExpr("new.target.foo", dotExpr(newTarget(), ident("foo")));
+    assertInFunctionExpr("new.target[\"foo\"]", memExpr(newTarget(), literal("foo")));
+
+    assertInFunctionExpr("new.target()", callExpr(newTarget(), []));
+    assertInFunctionExpr("new new.target()", newExpr(newTarget(), []));
+
+    // assignment to newTarget is an error
+    assertError("new.target = 4", SyntaxError);
+
+    // only new.target is a valid production, no shorn names or other names
+    assertError("new.", SyntaxError);
+    assertError("new.foo", SyntaxError);
+    assertError("new.targe", SyntaxError);
+
+    // obj.new.target is still a member expression
+    assertExpr("obj.new.target", dotExpr(dotExpr(ident("obj"), ident("new")), ident("target")));
+}
+
+runtest(testNewTarget);