unit-test-patterns

name	unit-test-patterns
description	Code patterns and examples for Scopy IIOWidget unit tests. Covers standard helpers, data-driven testing, and complex multi-step scenarios. Auto-loads when creating or reviewing `*_Unit_test.js` files.

Unit Test Patterns for Scopy IIOWidget Tests

This skill provides code patterns for generating and reviewing JS unit tests that validate IIOWidget attributes in Scopy plugins. All examples are from the AD9371 reference implementation.

Standard Helper Functions

These helpers test individual widget attributes. Every unit test file must define and use them.

Pattern	File	Widget Type	Description
testRange	test-range.md	Range/Spinbox	Write min/max/mid, verify readback with tolerance
testCombo	test-combo.md	Combo/Dropdown	Iterate valid options, verify exact match
testCheckbox	test-checkbox.md	Checkbox/Toggle	Toggle 0/1, verify readback
testReadOnly	test-readonly.md	Read-Only	Verify value is non-empty
testConversion	test-conversion.md	API + Widget	Validate API scaling vs raw widget value
testBadValueRange	test-bad-value-range.md	Range boundary	Verify above-max/below-min clamping
testBadValueCombo	test-bad-value-combo.md	Combo boundary	Verify invalid option rejection
testCalibrationFlag	test-calibration-flag.md	Calibration toggle	Test enable/disable via API getter/setter
runDataDrivenTests	data-driven-tests.md	Batch dispatch	Run array of test descriptors through helpers

Complex Test Patterns

Multi-step scenarios that test functionality beyond single-widget read/write. Each pattern includes: when to use, API signature trigger, and complete code example.

Pattern	File	Trigger
Calibration Flow	complex-calibration-flow.md	calibrate() exists in API
Profile Loading	complex-profile-loading.md	loadProfile() exists
Gain Mode Interaction	complex-gain-mode-interaction.md	getXxxGainControlMode() + setXxxHardwareGain()
State Transitions	complex-state-transitions.md	getEnsmMode()/setEnsmMode()
DPD Operations	complex-dpd-operations.md	dpdReset() + getDpdStatus()
Channel Independence	complex-channel-independence.md	Setter with int channel, count > 1
Phase Rotation	complex-phase-rotation.md	getPhaseRotation()/setPhaseRotation()
Frequency Tuning	complex-frequency-tuning.md	Getter/setter with Hz-to-MHz conversion

File Structure

Reference	File
File Structure & Boilerplate	file-structure.md

Key Rules

1. Every setter must be followed by msleep(500) — no exceptions
2. Every test must save and restore original values — in all exit paths
3. Use standard helpers — do not write ad-hoc read/write/compare for standard widget types
4. Use runDataDrivenTests() — for sections with 3+ widgets of the same type
5. UID format: UNIT.<SECTION>.<ATTRIBUTE_NAME> — uppercase, dots as separators
6. Widget key format: <device-name>/<channel>/<attribute> or <device-name>/<attribute>