
PASS Passing nothing to Headers constructor 
PASS Passing undefined to Headers constructor 
PASS Passing null to Headers constructor 
PASS Basic operation with one property 
PASS Basic operation with one property and a proto 
PASS Correct operation ordering with two properties 
PASS Correct operation ordering with two properties one of which has an invalid name 
PASS Correct operation ordering with two properties one of which has an invalid value 
PASS Correct operation ordering with non-enumerable properties 
PASS Correct operation ordering with undefined descriptors 
PASS Correct operation ordering with repeated keys 
FAIL Basic operation with Symbol keys assert_throws: function "function () { var h = new Headers(proxy); }" did not throw
FAIL Operation with non-enumerable Symbol keys assert_equals: expected 9 but got 8