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Manuals / Selenium WebDriver / Chapter 8

C · Test Infrastructure · intermediate · Week 6–7 · Chapter 8 of 12

Selenium Grid awareness

Grid runs browsers on remote nodes — parallel cross-browser at scale. You may not run Grid locally, but enterprise interviews expect awareness.

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Step 1 of 4

Grid architecture

Hub routes commands. Nodes run browsers. Client uses RemoteWebDriver pointing at hub URL.

Grid architectureDrag stickies · tap for tips
Study mapDrag stickies · tap for tipsKeep it shortdrag · tap →Name the waitdrag · tap →Scope locatorsdrag · tap →Trace when stuckdrag · tap →One browser firstdrag · tap →Isolate statedrag · tap →Assert the UIdrag · tap →Retry wiselydrag · tap →Seed datadrag · tap →Close the loopdrag · tap →Keep it shortdrag · tap →Name the waitdrag · tap →Scope locatorsdrag · tap →Trace when stuckdrag · tap →One browser firstdrag · tap →Isolate statedrag · tap →Pathwise hackdrag · tap →Grid architecturedrag · tap →Try thisdrag · tap →Follow the dashed drag · tap →

Do this now

Draw hub-node diagram in GRID-NOTES.md.

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Chapter learning outcomes
  • Hub and Node model
  • RemoteWebDriver
  • Docker Grid quickstart
  • Cloud grids (BrowserStack, Sauce Labs)

Clear these before you leave

Side quest

Parallel concept

Explain how 4 nodes cut 40 tests from 40 min to ~10 min.