Testing Data Visualizations Overview Use this skill when the main question is how to verify a visualization, not just how to render one. Testing charts means protecting analytical truth, interaction behavior, rendering stability, and product integration without turning every pixel into a brittle contract. Default assumption: use the smallest test mix that catches wrong numbers, broken interactions, and obvious visual regressions. Favor deterministic fixtures and targeted image baselines over giant snapshot suites. Choose This Skill When - the user asks how to test a chart, dashboard, or visua…