Diagnostic Integrity

BDR claims: “Video is the Detective, Tables are the Spoiler”. We strive for the engineer to know the cause of the failure even before watching the video or trace viewer.

1. Data Comparison Tables

If a test fails on data verification (e.g., cart price mismatch), BDR requires attaching a Comparison Table directly to the report step.

• Before: VERIFY price.is(100) -> Error.
• After: Report shows table: | Parameter | Expected | Actual |.

2. Contextual Attachments

Every failure must be accompanied by:

• System State (Snapshot): localStorage contents, cookies.
• Business Context: Which specific user and at what step of the “business flow” the failure occurred.

3. Readable Errors (Why it failed)

Instead of a technical stack trace Error: timeout 5000ms, BDR Layer 2 should generate business errors:

“Error: Failed to add item ‘Backpack’ to cart. ‘Add to cart’ button was blocked by warehouse state.”