| import { expect, test } from "bun:test" |
| import { classifySessionSwitch } from "../timeline/session-tab-switch-metrics" |
|
|
| test("counts source and blank samples before the destination is observed", () => { |
| const result = classifySessionSwitch([ |
| { observedAtMs: 16, destination: [], source: ["source"], hasVisibleRows: true, last: false }, |
| { observedAtMs: 32, destination: [], source: [], hasVisibleRows: false, last: false }, |
| { observedAtMs: 48, destination: ["destination"], source: [], hasVisibleRows: true, last: true, bottomErrorPx: 0 }, |
| { observedAtMs: 64, destination: ["destination"], source: [], hasVisibleRows: true, last: true, bottomErrorPx: 0 }, |
| { observedAtMs: 80, destination: ["destination"], source: [], hasVisibleRows: true, last: true, bottomErrorPx: 0 }, |
| ]) |
|
|
| expect(result.blankSamples).toBe(1) |
| expect(result.sourceSamples).toBe(1) |
| expect(result.unknownSamples).toBe(0) |
| expect(result.firstDestinationObservedMs).toBe(48) |
| expect(result.stableObservedMs).toBe(80) |
| }) |
|
|
| test("does not classify mixed source and destination content as correct", () => { |
| const result = classifySessionSwitch([ |
| { |
| observedAtMs: 16, |
| destination: ["destination"], |
| source: ["source"], |
| hasVisibleRows: true, |
| last: true, |
| bottomErrorPx: 0, |
| }, |
| { observedAtMs: 32, destination: ["destination"], source: [], hasVisibleRows: true, last: true, bottomErrorPx: 0 }, |
| { observedAtMs: 48, destination: ["destination"], source: [], hasVisibleRows: true, last: true, bottomErrorPx: 0 }, |
| { observedAtMs: 64, destination: ["destination"], source: [], hasVisibleRows: true, last: true, bottomErrorPx: 0 }, |
| ]) |
|
|
| expect(result.firstCorrectObservedMs).toBe(32) |
| expect(result.stableObservedMs).toBe(64) |
| }) |
|
|
| test("reports missing correctness without throwing", () => { |
| const result = classifySessionSwitch([ |
| { |
| observedAtMs: 16, |
| destination: ["destination"], |
| source: ["source"], |
| hasVisibleRows: true, |
| last: true, |
| bottomErrorPx: 0, |
| }, |
| ]) |
|
|
| expect(result.firstDestinationObservedMs).toBe(16) |
| expect(result.firstCorrectObservedMs).toBeNull() |
| expect(result.stableObservedMs).toBeNull() |
| }) |
|
|
| test("requires an explicitly tracked part to be visible", () => { |
| const result = classifySessionSwitch([ |
| { |
| observedAtMs: 16, |
| destination: ["destination"], |
| source: [], |
| hasVisibleRows: true, |
| last: true, |
| requiredPartVisible: false, |
| bottomErrorPx: 0, |
| }, |
| ]) |
|
|
| expect(result.firstCorrectObservedMs).toBeNull() |
| }) |
|
|
| test("can measure content correctness without requiring a bottom anchor", () => { |
| const result = classifySessionSwitch([ |
| { |
| observedAtMs: 16, |
| destination: ["destination"], |
| source: [], |
| hasVisibleRows: true, |
| last: true, |
| requiredPartVisible: true, |
| bottomAnchorRequired: false, |
| }, |
| ]) |
|
|
| expect(result.firstCorrectObservedMs).toBe(16) |
| }) |
|
|
