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'use strict';
import { network } from './topology';
test('basic network functionality', () => {
const n = network(0, 5, 0);
expect(n).toEqual({
input_count: 0,
output_count: 0,
adjacency: [ [], [], [], [], [] ],
weight: [],
});
expect(() => n.adjacency = []).toThrow();
expect(() => n.weight = []).toThrow();
const nn = n.connect(0, 1, -2);
expect(nn).toEqual({
input_count: 0,
output_count: 0,
adjacency: [
[ 1 ],
[ -1 ],
[ 0 ],
[ 0 ],
[ 0 ]
],
weight: [ -2 ],
});
expect(() => nn.adjacency = []).toThrow();
expect(() => nn.weight = []).toThrow();
const nnn = nn.connect(2, 4, 3);
expect(nnn).toEqual({
input_count: 0,
output_count: 0,
adjacency: [
[ 1, 0 ],
[ -1, 0 ],
[ 0, 1 ],
[ 0, 0 ],
[ 0, -1 ]
],
weight: [ -2, 3 ],
});
expect(() => nnn.adjacency = []).toThrow();
expect(() => nnn.weight = []).toThrow();
});
test(
'networks are restricted from sinking to inputs or sourcing from outputs',
() => {
const n = network(2, 2, 2);
expect(n.connect(1,2,0)).toEqual({
input_count: 2,
output_count: 2,
adjacency: [
[ 0 ],
[ 1 ],
[ -1 ],
[ 0 ],
[ 0 ],
[ 0 ],
],
weight: [ 0 ],
});
expect(() => n.connect(2, 1, 0)).toThrow();
expect(n.connect(3, 4, 2)).toEqual({
input_count: 2,
output_count: 2,
adjacency: [
[ 0 ],
[ 0 ],
[ 0 ],
[ 1 ],
[ -1 ],
[ 0 ],
],
weight: [ 2 ],
});
expect(() => n.connect(4, 3, 2)).toThrow();
});
test('self-connections work correctly', () => {
const n = network(0, 1, 0).connect(0, 0, 2.0);
expect(n).toEqual({
input_count: 0,
output_count: 0,
adjacency: [
[ 2 ],
],
weight: [ 2 ],
});
});
test('network computations', () => {
const n = network(1, 0, 1).connect(0, 1, 2.0);
const input = [ -0.5 ];
const state = [];
const result = n.compute(input, state);
expect(result).toEqual([
[ Math.tanh(-0.5 * 2.0) ],
[],
]);
expect(input).toEqual([ -0.5 ]);
expect(state).toEqual([]);
expect(() => result[0] = 'hi').toThrow();
expect(() => result[0].push('hi')).toThrow();
expect(() => result[1] = 'hi').toThrow();
expect(() => result[1].push('hi')).toThrow();
});
test('multiple input network', () => {
const n = network(4, 0, 1)
.connect(0, 4, -1.0)
.connect(1, 4, -2.0)
.connect(2, 4, 1.0)
.connect(3, 4, 2.0)
expect(n.compute([1, 2, 3, 5], [])).toEqual([
[ Math.tanh(
(-1.0 * 1) +
(-2.0 * 2) +
(1.0 * 3) +
(2.0 * 5))],
[],
]);
});
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