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import { describe, expect, test } from 'bun:test';
import {
checkCompatibility,
isCompatible,
olderSide,
type ProtocolVersion,
} from './useCompatibilityData';
function protocol(
major: number,
minor: number,
patch: number,
minSupportedMinor = 0,
): ProtocolVersion {
return { major, minor, patch, minSupportedMinor };
}
describe('checkCompatibility', () => {
test('calls an identical protocol on both ends fully compatible', () => {
expect(checkCompatibility(protocol(1, 0, 1), protocol(1, 0, 1))).toBe(
'compatible',
);
});
test('reports a degraded pair when Paper sends a sub-channel Velocity ignores', () => {
// Paper 1.3.0 speaks 1.0.1 — the PATCH that added cross-server direct
// messages — while Velocity 1.1.0 stopped at 1.0.0.
expect(checkCompatibility(protocol(1, 0, 1), protocol(1, 0, 0))).toBe(
'degraded',
);
});
test('reports a degraded pair when Velocity offers a sub-channel Paper never sends', () => {
expect(checkCompatibility(protocol(1, 0, 0), protocol(1, 0, 1))).toBe(
'degraded',
);
});
test('reports a degraded pair when Paper trails by a MINOR still inside the window', () => {
expect(checkCompatibility(protocol(1, 0, 0), protocol(1, 1, 0))).toBe(
'degraded',
);
});
test('rejects a MAJOR mismatch', () => {
expect(checkCompatibility(protocol(1, 0, 0), protocol(2, 0, 0))).toBe(
'major-mismatch',
);
});
test('rejects Paper running ahead of Velocity by a MINOR', () => {
expect(checkCompatibility(protocol(1, 1, 0), protocol(1, 0, 0))).toBe(
'paper-too-new',
);
});
test('rejects Paper older than the deprecation window admits', () => {
expect(checkCompatibility(protocol(1, 0, 0), protocol(1, 2, 0, 1))).toBe(
'paper-too-old',
);
});
});
describe('isCompatible', () => {
test('holds for a degraded pair, which still completes the handshake', () => {
expect(isCompatible(protocol(1, 0, 1), protocol(1, 0, 0))).toBe(true);
});
test('fails for a pair the handshake rejects', () => {
expect(isCompatible(protocol(1, 1, 0), protocol(1, 0, 0))).toBe(false);
});
});
describe('olderSide', () => {
test('names Velocity when it trails by a PATCH', () => {
expect(olderSide(protocol(1, 0, 1), protocol(1, 0, 0))).toBe('velocity');
});
test('names Paper when it trails by a PATCH', () => {
expect(olderSide(protocol(1, 0, 0), protocol(1, 0, 1))).toBe('paper');
});
test('lets a MINOR gap outrank the PATCH comparison', () => {
expect(olderSide(protocol(1, 0, 9), protocol(1, 1, 0))).toBe('paper');
});
});
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