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When unit tests fail because Jasmine spies aren’t behaving as expected, a systematic diagnostic approach can save hours of debugging. This guide walks through the most common spy issues, shows how to verify each step, and offers clear fixes and escalation paths.
Jasmine's spyOn replaces one method on one object, records its calls, and restores the original after each spec. Here's how to pick the right strategy and avoid the common traps.
Learn how Jasmine’s native spies let you replace collaborators, track calls, and stub behaviour without adding a mocking library, plus pitfalls to avoid.
Learn how to use Jasmine’s spyOn and jasmine.createSpy to isolate units, verify interactions, and keep tests close to real interfaces. This guide covers setup, an example, trade‑offs, and how to validate your spies in real projects.
Spies let you replace real functions with mock implementations in Jasmine tests. This guide covers how to create spies, control return values, handle async calls, and avoid common pitfalls.
Jasmine spies let you replace real collaborators with lightweight stand‑ins. This guide shows how to use spyOn, createSpy, and createSpyObj, gives a concrete example, discusses trade‑offs, and offers actionable best‑practice tips.
javascript
jasmine