Write specific, regression-proof test assertions that validate exact expected values rather than allowing ambiguous matches. Avoid assertions that could pass with incorrect but similar values.
Write specific, regression-proof test assertions that validate exact expected values rather than allowing ambiguous matches. Avoid assertions that could pass with incorrect but similar values.
Problems with weak assertions:
expect(a).eq(b)
passes even if both are undefined
Better assertion patterns:
// Instead of just comparing two potentially undefined values
expect(Cypress.currentTest.title).eq(cy.state('runnable').ctx.currentTest.title)
// Add type validation and literal value checks
expect(Cypress.currentTest.title)
.to.be.a('string')
.eq(cy.state('runnable').title)
.eq('returns current test runnable properties')
Key improvements:
.to.be.a('string')
to ensure expected data typesThis approach makes tests more reliable by catching edge cases where both compared values might be incorrect in the same way, and provides clearer failure messages when assertions fail.
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