This test checks that const declarations in JavaScript work and are readonly. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS const redef='a'; const redef='a'; threw exception SyntaxError: Cannot declare a const variable twice: 'redef'.. PASS function threw exception: 'function () { x = "WRONG"; }' PASS Assertion passed. PASS function threw exception: 'function () { y = "WRONG"; }' PASS Assertion passed. PASS function threw exception: 'function () { a = one++; }' PASS Assertion passed. PASS Assertion passed. PASS function threw exception: 'function () { a = one--; }' PASS Assertion passed. PASS Assertion passed. PASS function threw exception: 'function () { a = ++one; }' PASS Assertion passed. PASS Assertion passed. PASS function threw exception: 'function () { a = --one; }' PASS Assertion passed. PASS Assertion passed. PASS function threw exception: 'function () { a = one += 2; }' PASS Assertion passed. PASS Assertion passed. PASS function threw exception: 'function () { a = one = 2; }' PASS Assertion passed. PASS Assertion passed. PASS function f() { const one = 1; one++; return one; } f(); threw exception TypeError: Attempted to assign to readonly property.. PASS function f() { const oneString = '1'; return oneString++; } f(); threw exception TypeError: Attempted to assign to readonly property.. PASS function f() { const one = 1; return one++; } f(); threw exception TypeError: Attempted to assign to readonly property.. PASS function f() { const one = 1; one--; return one; } f(); threw exception TypeError: Attempted to assign to readonly property.. PASS function f() { const oneString = '1'; return oneString--; } f(); threw exception TypeError: Attempted to assign to readonly property.. PASS function f() { const one = 1; return one--; } f(); threw exception TypeError: Attempted to assign to readonly property.. PASS function f() { const one = 1; ++one; return one; } f(); threw exception TypeError: Attempted to assign to readonly property.. PASS function f() { const one = 1; return ++one; } f(); threw exception TypeError: Attempted to assign to readonly property.. PASS function f() { const one = 1; --one; return one; } f(); threw exception TypeError: Attempted to assign to readonly property.. PASS function f() { const one = 1; return --one; } f(); threw exception TypeError: Attempted to assign to readonly property.. PASS function f() { const one = 1; one += 2; return one; } f(); threw exception TypeError: Attempted to assign to readonly property.. PASS function f() { const one = 1; return one += 2; } f(); threw exception TypeError: Attempted to assign to readonly property.. PASS function f() { const one = 1; one = 2; return one; } f(); threw exception TypeError: Attempted to assign to readonly property.. PASS function f() { const one = 1; return one = 2; } f(); threw exception TypeError: Attempted to assign to readonly property.. PASS Assertion passed. PASS Assertion passed. PASS object.inWith1 is 'a' PASS object.inWith2 is 'b' PASS f() is f PASS tryCatch1Result is null PASS tryCatch2Result is null PASS with1Result is null PASS with2Result is null PASS function threw exception: 'function () { ++x; }' PASS Assertion passed. PASS function threw exception: 'function () { x++; }' PASS Assertion passed. PASS function threw exception: 'function () { x--; }' PASS Assertion passed. PASS function threw exception: 'function () { --x; }' PASS successfullyParsed is true TEST COMPLETE