Part 1: Implement ES6 function name property semantics

Issue #78

1 files changed, 58 insertions, 0 deletions

diff --git a/js/src/tests/ecma_6/Function/function-name-property.js b/js/src/tests/ecma_6/Function/function-name-property.js
new file mode 100644
index 000000000..7ad174b10
--- /dev/null
+++ b/js/src/tests/ecma_6/Function/function-name-property.js
@@ -0,0 +1,58 @@
+var BUGNUMBER = 883377;
+var summary = "Anonymous function name should be set based on property name";
+
+print(BUGNUMBER + ": " + summary);
+
+var fooSymbol = Symbol("foo");
+var emptySymbol = Symbol("");
+var undefSymbol = Symbol();
+
+var exprs = [
+    ["function() {}", false],
+    ["function named() {}", true],
+    ["function*() {}", false],
+    ["function* named() {}", true],
+    ["async function() {}", false],
+    ["async function named() {}", true],
+    ["() => {}", false],
+    ["async () => {}", false],
+    ["class {}", false],
+    ["class named {}", true],
+];
+
+function testPropertyDefinition(expr, named) {
+    var obj = eval(`({
+        prop: ${expr},
+        "literal": ${expr},
+        "": ${expr},
+        5: ${expr},
+        0.4: ${expr},
+        [Symbol.iterator]: ${expr},
+        [fooSymbol]: ${expr},
+        [emptySymbol]: ${expr},
+        [undefSymbol]: ${expr},
+        [/a/]: ${expr},
+    })`);
+    assertEq(obj.prop.name, named ? "named" : "prop");
+    assertEq(obj["literal"].name, named ? "named" : "literal");
+    assertEq(obj[""].name, named ? "named" : "");
+    assertEq(obj[5].name, named ? "named" : "5");
+    assertEq(obj[0.4].name, named ? "named" : "0.4");
+    assertEq(obj[Symbol.iterator].name, named ? "named" : "[Symbol.iterator]");
+    assertEq(obj[fooSymbol].name, named ? "named" : "[foo]");
+    assertEq(obj[emptySymbol].name, named ? "named" : "[]");
+    assertEq(obj[undefSymbol].name, named ? "named" : "");
+    assertEq(obj[/a/].name, named ? "named" : "/a/");
+
+    // Not applicable cases: __proto__.
+    obj = {
+        __proto__: function() {}
+    };
+    assertEq(obj.__proto__.name, "");
+}
+for (var [expr, named] of exprs) {
+    testPropertyDefinition(expr, named);
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);