Tests that console is cleared upon requestClearMessages call.
=== Before clear ===
console-clear.js:16 one
console-clear.js:17 two
console-clear.js:18 three
=== After clear ===
Tests that console is cleared upon requestClearMessages call.
=== Before clear ===
console-clear.js:16 one
console-clear.js:17 two
console-clear.js:18 three
=== After clear ===