Add unit tests for the slippage tolerance selector asserting correct max_price and min_price computation

[Chucks1093]

Summary

The slippage tolerance selector computes max_price and min_price from the preview price and selected tolerance. Unit tests should assert these values are computed correctly for each preset tolerance and that the custom input is validated properly.

Scope

• Test that 0.5% tolerance on a preview price of 100 XLM computes max_price of 100.5 XLM
• Test that 5% tolerance on a preview price of 100 XLM computes max_price of 105 XLM
• Test that 1% sell tolerance on a preview price of 100 XLM computes min_price of 99 XLM
• Test that a custom tolerance of 0% is accepted and computes max_price equal to preview price
• Test that a custom tolerance above 50% shows a validation error and disables the confirm button

Acceptance Criteria

• 0.5% buy tolerance computed correctly
• 5% buy tolerance computed correctly
• 1% sell tolerance computed correctly
• 0% custom tolerance sets max_price equal to preview price
• Custom tolerance above 50% shows error and disables confirm

ETA: 12 hours

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[Malcolm-Wander]

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Hello maintainer,I’d love to work on this issue please,I promise to do a good and swift job..thank you.

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[The-Najaah]

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Hello Maintainer. I can fix this issue. Please assign it to me.

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[flexocode442]

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[Hu-ter]

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I can fit this real quick..

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[Naajih09]

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Hi, I'd like to work on this issue. I've gone through the description and acceptance criteria and I'm confident I can deliver it. I'll make sure every acceptance criterion is met and submit a clean, tested PR. Please assign it to me.

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[isaac4real-art]

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Hello, this issue aligns well with my skills, and I believe I can provide an effective solution. Kindly consider assigning it to me.

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[damilare0813]

@damilare0813 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

I'd be glad to handle this issue. I'll keep the implementation concise, maintainable, and well-documented

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[uche001-dev]

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Hello can i work on this issue?

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[Mawuli-tech]

@Mawuli-tech has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi, my name is Mawuli, and I am a fullstack and smart contract developer skilled in React, Next.js, JavaScript, TypeScript, Tailwind CSS, and Soroban. For this task, I will:

Write tests asserting that 0.5% buy tolerance on a preview price of 100 XLM computes max_price of 100.5 XLM, and that 5% buy tolerance computes max_price of 105 XLM, covering the preset tolerance options directly.
Write a test asserting that 1% sell tolerance on a preview price of 100 XLM computes min_price of 99 XLM, confirming the sell-side computation applies the tolerance in the correct direction.
Write a test asserting that a custom tolerance of 0% is accepted without a validation error and computes max_price exactly equal to the preview price with no rounding error.
Write a test asserting that a custom tolerance above 50% renders a validation error message and leaves the confirm button in a disabled state, and confirm all five tests pass cleanly against the existing slippage selector implementation.

ETA: 10 hours

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Congratulations, @Mawuli-tech! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

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