If you do not have application ready, As a test lead I can ask to write details test plan, high level (first document) Test Strategy document which contain
STRATEGY
Project Purpose
Testing Purpose
Testing Descritpion
Time Sketch (based on requirement document).
Impact on the Network infrastructure
Risk and security assessment
Recommonded testing (regression, functional, automation, performance)
plan to use tools
TEST PLAN / QUALITY CONTROL PLAN
Introduction of the project
Objectives, TEst environment, components tobe tested,
Test approach, Issue management, test deliverables,
Resources testing, and details Schedule