Tests that setting breakpoint before enabling debugger produces an error
setBreakpointByUrl error: {
  "code": -32000,
  "message": "Debugger agent is not enabled"
}
setBreakpoint error: {
  "code": -32000,
  "message": "Debugger agent is not enabled"
}
setBreakpointOnFunctionCall error: {
  "code": -32000,
  "message": "Debugger agent is not enabled"
}