bitburner-src/test/jest/Grow.test.ts

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import { PlayerObject } from "../../src/PersonObjects/Player/PlayerObject";
import { Server } from "../../src/Server/Server";
import { calculateServerGrowth } from "../../src/Server/formulas/grow";
import { numCycleForGrowthCorrected } from "../../src/Server/ServerHelpers";
test("Grow is accurate", () => {
// Tests that certain special values work out to exactly what we'd expect,
// given the formulas. The growth multiplier maxes out at 1.0035, and the
// increment is .03 so with a difficulty of 10 it should be .003.
// These tests are *exact* because the whole point is that the math should
// get exactly the right value (or as close as is possible with floating-point).
const server = new Server({ hostname: "foo", hackDifficulty: 5, serverGrowth: 100 });
const player = new PlayerObject();
expect(calculateServerGrowth(server, 1, player)).toBe(1.0035);
expect(calculateServerGrowth(server, 2, player)).toBe(1.00701225);
server.hackDifficulty = 10;
expect(calculateServerGrowth(server, 1, player)).toBe(1.003);
expect(calculateServerGrowth(server, 2, player)).toBe(1.006009);
expect(calculateServerGrowth(server, 3, player)).toBe(1.009027027);
expect(calculateServerGrowth(server, 4, player)).toBe(1.012054108081);
});
describe("numCycleForGrowthCorrected reverses calculateServerGrowth", () => {
// Test that numCycleForGrowthCorrected() functions properly as the inverse
// of calculateServerGrowth().
// calculateServerGrowth() works for *any* given number of threads, but is
// usually passed an integer. numCycleForGrowthCorrected() *always* returns
// an integer, the ceiling of the floating-point value. When reversing an
// integer number of threads, it should *always* return the same integer.
// Similarly, if we pass the next-highest representable number as a target,
// it should *always* return the next largest integer, since the previous
// number is no longer sufficient.
// This is an arbitrary transcedental constant.
const multiplier = Math.exp(1.4);
const server = new Server({ hostname: "foo", hackDifficulty: 10 * multiplier, serverGrowth: 100 });
server.moneyMax = 1e308; // Not available as a constructor param
const player = new PlayerObject();
const tests = [];
while (server.moneyAvailable < 5e49) {
tests.push(server.moneyAvailable);
server.moneyAvailable = (server.moneyAvailable + 59) * calculateServerGrowth(server, 59, player);
}
test.each(tests)("startMoney: %f", (money: number) => {
// Do fewer threads to save on test time
for (let threads = 0; threads < 30; threads++) {
const newMoney = (money + threads) * calculateServerGrowth(server, threads, player);
const eps = newMoney ? 2 ** (Math.floor(Math.log2(newMoney)) - 52) : Number.MIN_VALUE;
expect(numCycleForGrowthCorrected(server, newMoney, money, 1, player)).toBe(threads);
const value = numCycleForGrowthCorrected(server, newMoney + eps, money, 1, player);
// Write our own check because Jest is a goblin that can't provide context
if (value !== threads + 1) {
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throw new Error(
`value (${value}) was not equal to threads+1 (${threads + 1})\n\n` +
`newMoney: ${newMoney} eps: ${eps} newMoney+eps: ${newMoney + eps} value: ${value} threads: ${threads}`,
);
}
}
});
const tests2 = [];
for (let t = 0; t <= 900000; t += 2000) {
tests2.push([t, t * calculateServerGrowth(server, t, player)]);
}
test.each(tests2)("threads: %f newMoney: %f", (threads: number, newMoney: number) => {
const eps = newMoney ? 2 ** (Math.floor(Math.log2(newMoney)) - 52) : Number.MIN_VALUE;
expect(numCycleForGrowthCorrected(server, newMoney, 0, 1, player)).toBe(threads);
const value = numCycleForGrowthCorrected(server, newMoney + eps, 0, 1, player);
// Write our own check because Jest is a goblin that can't provide context
if (value !== threads + 1) {
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throw new Error(
`value (${value}) was not equal to threads+1 (${threads + 1})\n\n` +
`newMoney: ${newMoney} eps: ${eps} newMoney+eps: ${newMoney + eps} value: ${value} threads: ${threads}`,
);
}
});
});