Switch Plan Wide Event implementation

[nalcalag]

Task/Issue URL: https://app.asana.com/1/137249556945/project/488551667048375/task/1211542241177650?focus=true

Description

Add wide event for switch flow

Steps to test this PR

Pre steps

• Apply patch on Asana task https://app.asana.com/1/137249556945/project/1209991789468715/task/1210448620621729?focus=true

Test 1: Successful Upgrade (Monthly → Yearly)

• Install from branch
• Buy a monthly test subscription and wait for Free Trial to finish (3 minutes)
• Navigate to Subscription Settings
• Click in Switch to yearly option
• Verify switch confirmation dialog appears
• Click "Switch to Yearly" button in the dialog
• Complete the Play Billing flow
• Verify in logcat that all steps are recorded:
  • validate_current_subscription.success = true
  • retrieve_target_plan.success = true
  • billing_flow_switch.success = true
  • confirm_switch.success = true
  • ui_refresh
• Verify wide event pixel is sent with:
  • context.name = "subscription_settings"
  • from_plan = "ddg.privacy.pro.monthly.renews.[us|row]"
  • to_plan = "ddg.privacy.pro.yearly.renews.[us|row]"
  • switch_type = "upgrade"
  • activation_latency_ms_bucketed with a value
  • feature.status = SUCCESS

Test 2: Successful Downgrade (Yearly → Monthly)

• Navigate to Subscription Settings with a yearly subscription
• Click "Switch to Monthly" option
• Verify switch confirmation dialog appears
• Click "Switch to Monthly" button in the dialog
• Complete the Play Billing flow
• Verify in logcat that all steps are recorded
• Verify wide event pixel is sent with:
  • from_plan = "ddg.privacy.pro.yearly.renews.[us|row]"
  • to_plan = "ddg.privacy.pro.monthly.renews.[us|row]"
  • switch_type = "downgrade"
  • feature.status = SUCCESS

Test 3: User Cancels in Play Billing Flow

• Navigate to Subscription Settings
• Click switch plan option and confirm in the dialog
• Cancel/back out in the Google Play Billing screen
• Verify wide event pixel is sent with:
  • feature.status = CANCELLED

Test 4: Billing Flow Error

• Start switch flow
• Use a test card that always declines (if available in test environment)
• Complete the Play Billing flow with the failing card
• Verify wide event pixel is sent with:
  • feature.status = FAILURE
  • feature.data.ext.error contains billing error details
  • billing_flow_switch.success = false

Test 5: Switch from Dev Settings (Optional)

• Go to Settings > Subscriptions dev settings
• Use the "Switch Subscription" option
• Complete a switch
• Verify wide event pixel is sent with:
  • context.name = "dev_settings"
  • feature.status = SUCCESS

Test 6: Feature Flag Disabled

• Go to Feature Flag inventory
• Disable sendSubscriptionSwitchWideEvent
• Perform a complete switch flow (upgrade or downgrade)
• Verify that NO wide event pixels are sent during the switch flow

Test 7: Multiple Switch Attempts

• Perform multiple switch operations (e.g., upgrade then downgrade)
• Verify count pixel (.c) is sent on every switch attempt
• Verify daily pixel (.d) is sent at most once per day
• Verify global.sample_rate = 1 in all events

Test 8: Wide Event Metadata Validation
For any successful switch, verify all required fields are present:

• context.name (e.g., "subscription_settings", "dev_settings")
• feature.name = "subscription-switch"
• feature.status (SUCCESS/FAILURE/CANCELLED)
• feature.data.ext.from_plan
• feature.data.ext.to_plan
• feature.data.ext.switch_type (upgrade/downgrade)
• feature.data.ext.activation_latency_ms_bucketed (when billing successful)
• All recorded step success/failure indicators
• Android common wide event fields (app.name, app.version, app.form_factor, etc.)

No UI changes

[nalcalag]

• Switch Plan Wide Event implementation #7176 👈 (View in Graphite)
• develop

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