components/TestCoreTempCard.ts

Purpose

TestCoreTempCard is a lightweight developer/testing component used to manually validate the core temperature inference pipeline.

The component provides a deterministic test harness around runCoreTempInference by:

• Supplying a fixed set of known inputs

• Running inference on demand

• Displaying the resulting:

  • predicted core temperature,
  • physiological state,
  • model source

This component is intended for:

• debugging,
• regression testing,
• model verification,
• QA validation,
• and inference pipeline smoke testing.

Unlike production prediction components, this card does not:

• fetch live activity data,
• load weather feeds,
• poll sensors,
• or read user profile state dynamically.

All inputs are intentionally hardcoded to ensure repeatable and stable outputs.

Invariants

The component maintains the following guarantees:

• The same hardcoded input dataset is used for every test run unless the source code changes.
• Pressing “Run Test Case” triggers exactly one inference execution.
• No automatic polling or background refresh occurs.
• The component does not write to persistent storage.
• All displayed outputs originate directly from the most recent successful inference result.
• Inference failures are surfaced through a React Native Alert.
• Prior to execution, all result fields render placeholder values ("—").

Fixed Test Inputs

These values act as a stable regression baseline for validating inference behavior.

Variants

Idle State

Initial render before any inference execution.

Characteristics:

• Output values display "—".
• No inference has been executed yet.

Running State

Occurs after the user presses “Run Test Case” and inference is executing asynchronously.

Characteristics:

• The component awaits inference completion.
• No loading spinner or disabled button state is currently implemented.

Success State

Occurs after successful inference completion.

Characteristics:

• Displays:

  • predicted core temperature,
  • inferred physiological state,
  • model identifier used during prediction.

Error State

Occurs if runCoreTempInference throws.

Characteristics:

• Displays a native alert dialog with the error message.
• Previously rendered successful results remain visible.

Exports

Default Export

TestCoreTempCard

const TestCoreTempCard: React.FC<Props>

Developer-facing test component for executing deterministic core temperature inference runs.

Props

type Props = {
  title?: string;
};

Internal Components

Row

const Row: React.FC<{
  label: string;
  value: string;
  bold?: boolean;
}>

Simple internal helper component used to render label/value rows for both input and output sections.

Not exported outside the module.

External Dependencies

Inference

runCoreTempInference(...)

Executes the core temperature prediction model.

React Native APIs

The component uses:

• View
• Text
• Pressable
• Alert
• StyleSheet

for layout, interaction, and error presentation.