Test a market buy order from search to position

The flow under test

An order that reports filled and never reaches the portfolio is the failure worth designing the test around, because both screens look correct in isolation.

• The ticker resolves - a search for NVDA produces a matching row.
• The ticket carries the price - a last price of $178.42 on the order ticket itself.
• The estimate matches - one share at that price gives an estimated cost of $178.42.
• The position exists - a NVDA holding of one share on the portfolio page.

The last assertion is on a different page than the trade. That navigation is the whole value of the test: a fill banner is produced by the screen that placed the order, and the portfolio is the independent record.

The test file

The estimated cost is asserted before the order is placed, which pins the relationship between share count and last price rather than trusting the total that appears afterwards.

---
mode: testing
url: https://my-testing-repo-main.vercel.app/robinhood-clone-app/trade?reset=true
max_steps: 45
tags: [robinhood, fintech, trading]
---

# Robinhud 16.1: Market buy

Catalog objective: search a ticker and place a one share market buy.
Key assertion: the order fills and the share count updates.

## Search for the ticker
Type "NVDA" into "Search ticker or name" and verify a result row for "NVDA" appears.

## Open the order ticket
Click "Trade" on the NVDA row and verify an order ticket titled "Buy NVDA" shows "Last price" of "$178.42".

## Place a one share market buy
Make sure "Market order" is selected, set "Shares" to "1", verify "Estimated cost" reads "$178.42", and click "Review and buy".

## Verify the fill and the position
Verify a green banner titled "Order filled" shows a status of "Filled" at "$178.42", then go to https://my-testing-repo-main.vercel.app/robinhood-clone-app/portfolio and verify a "NVDA" position with 1 share is listed.

The final step navigates explicitly to the portfolio URL rather than relying on a redirect, so the assertion is about the stored position and not about a confirmation screen.

Step by step coverage

Three steps on the ticket, one on the record.

Asserting the fill price as well as the fill status matters on a market order. Filled at an unexpected price is a different conversation from not filled at all.

Running it

kane-cli testmd run tests/robinhood/market-buy_test.md

Against a live brokerage environment this belongs in a paper trading account. The flow places a real order in whatever environment it is pointed at.

Trading interfaces are dense and change often, which makes them a good fit for plain English steps. How browser agents read a page covers why, and the test.md format covers the file structure used here.