85 lines
3.1 KiB
TypeScript
85 lines
3.1 KiB
TypeScript
import { describe, expect, test } from "vite-plus/test";
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import { findLowestSumSlotIndex, isStaticTariff } from "./forecast";
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describe("findLowestSumSlotIndex", () => {
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test("finds lowest sum with span of 4", () => {
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const slots = [
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{ start: "2025-01-01T00:00:00Z", value: 10 },
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{ start: "2025-01-01T00:15:00Z", value: 8 },
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{ start: "2025-01-01T00:30:00Z", value: 6 },
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{ start: "2025-01-01T00:45:00Z", value: 4 }, // sum 28 (index 0)
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{ start: "2025-01-01T01:00:00Z", value: 2 }, // sum 20 (index 1)
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{ start: "2025-01-01T01:15:00Z", value: 3 }, // sum 14 (index 2)
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{ start: "2025-01-01T01:30:00Z", value: 5 }, // sum 13 (index 3) lowest
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{ start: "2025-01-01T01:45:00Z", value: 7 }, // sum 17 (index 4)
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];
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expect(findLowestSumSlotIndex(slots, 4)).toBe(3);
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});
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test("returns -1 when not enough slots", () => {
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const slots = [
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{ start: "2025-01-01T00:00:00Z", value: 10 },
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{ start: "2025-01-01T00:15:00Z", value: 8 },
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];
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expect(findLowestSumSlotIndex(slots, 4)).toBe(-1);
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});
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test("handles exact span length", () => {
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const slots = [
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{ start: "2025-01-01T00:00:00Z", value: 5 },
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{ start: "2025-01-01T00:15:00Z", value: 3 },
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{ start: "2025-01-01T00:30:00Z", value: 2 },
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{ start: "2025-01-01T00:45:00Z", value: 1 },
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];
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expect(findLowestSumSlotIndex(slots, 4)).toBe(0);
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});
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test("finds lowest at end", () => {
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const slots = [
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{ start: "2025-01-01T00:00:00Z", value: 10 },
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{ start: "2025-01-01T00:15:00Z", value: 10 },
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{ start: "2025-01-01T00:30:00Z", value: 1 },
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{ start: "2025-01-01T00:45:00Z", value: 1 },
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{ start: "2025-01-01T01:00:00Z", value: 1 },
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];
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expect(findLowestSumSlotIndex(slots, 3)).toBe(2);
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});
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test("returns first index when multiple equal sums", () => {
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const slots = [
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{ start: "2025-01-01T00:00:00Z", value: 2 },
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{ start: "2025-01-01T00:15:00Z", value: 2 }, // sum 4
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{ start: "2025-01-01T00:30:00Z", value: 2 }, // sum 4 (same)
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{ start: "2025-01-01T00:45:00Z", value: 2 },
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];
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expect(findLowestSumSlotIndex(slots, 2)).toBe(0);
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});
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});
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describe("isStaticTariff", () => {
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test("returns false for undefined", () => {
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expect(isStaticTariff(undefined)).toBe(false);
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});
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test("returns false for empty array", () => {
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expect(isStaticTariff([])).toBe(false);
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});
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test("returns true when all values are identical", () => {
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const slots = [
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{ start: "2025-01-01T00:00:00Z", end: "2025-01-01T00:15:00Z", value: 0.25 },
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{ start: "2025-01-01T00:15:00Z", end: "2025-01-01T00:30:00Z", value: 0.25 },
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{ start: "2025-01-01T00:30:00Z", end: "2025-01-01T00:45:00Z", value: 0.25 },
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];
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expect(isStaticTariff(slots)).toBe(true);
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});
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test("returns false when values differ", () => {
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const slots = [
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{ start: "2025-01-01T00:00:00Z", end: "2025-01-01T00:15:00Z", value: 0.25 },
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{ start: "2025-01-01T00:15:00Z", end: "2025-01-01T00:30:00Z", value: 0.3 },
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{ start: "2025-01-01T00:30:00Z", end: "2025-01-01T00:45:00Z", value: 0.25 },
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];
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expect(isStaticTariff(slots)).toBe(false);
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});
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});
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