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Fix isFunction typing

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This commit is contained in:
thepaperpilot 2022-09-26 18:41:10 -05:00
parent 73d6fd7566
commit 5bea1bf9b4
3 changed files with 17 additions and 14 deletions
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4
src/features/boards/board.ts
View file

@ -10,7 +10,7 @@ import {
} from "features/feature"; } from "features/feature";
import { globalBus } from "game/events"; import { globalBus } from "game/events";
import type { Persistent, State } from "game/persistence"; import type { Persistent, State } from "game/persistence";
import { persistent, PersistentState } from "game/persistence"; import { persistent } from "game/persistence";
import type { Unsubscribe } from "nanoevents"; import type { Unsubscribe } from "nanoevents";
import { isFunction } from "util/common"; import { isFunction } from "util/common";
import type { import type {
@ -336,7 +336,7 @@ export function createBoard<T extends BoardOptions>(
} }
export function getNodeProperty<T>(property: NodeComputable<T>, node: BoardNode): T { export function getNodeProperty<T>(property: NodeComputable<T>, node: BoardNode): T {
return isFunction(property) ? property(node) : unref(property); return isFunction<T, [BoardNode], Computable<T>>(property) ? property(node) : unref(property);
} }
export function getUniqueNodeID(board: GenericBoard): number { export function getUniqueNodeID(board: GenericBoard): number {

7
src/util/common.ts
View file

@ -12,9 +12,10 @@ export function camelToTitle(camel: string): string {
return title; return title;
} }
// eslint-disable-next-line @typescript-eslint/ban-types export function isFunction<T, S extends ReadonlyArray<unknown>, R>(
export function isFunction(func: unknown): func is Function { functionOrValue: ((...args: S) => T) | R
return typeof func === "function"; ): functionOrValue is (...args: S) => T {
return typeof functionOrValue === "function";
} }
export enum Direction { export enum Direction {

20
tests/util/common.test.ts
View file

@ -13,13 +13,15 @@ describe("isFunction", () => {
test("Given function returns true", () => expect(isFunction(vi.fn())).toBe(true)); test("Given function returns true", () => expect(isFunction(vi.fn())).toBe(true));
// Go through all primitives and basic types // Go through all primitives and basic types
test("Given a string returns false", () => expect(isFunction("test")).toBe(false)); test("Given a non-function returns false", () => {
test("Given a number returns false", () => expect(isFunction(10)).toBe(false)); expect(isFunction("test")).toBe(false);
test("Given a bigint returns false", () => expect(isFunction(BigInt(10))).toBe(false)); expect(isFunction(10)).toBe(false);
test("Given a boolean returns false", () => expect(isFunction(true)).toBe(false)); expect(isFunction(BigInt(10))).toBe(false);
test("Given undefined returns false", () => expect(isFunction(undefined)).toBe(false)); expect(isFunction(true)).toBe(false);
test("Given a symbol returns false", () => expect(isFunction(Symbol())).toBe(false)); expect(isFunction(undefined)).toBe(false);
test("Given null returns false", () => expect(isFunction(null)).toBe(false)); expect(isFunction(Symbol())).toBe(false);
test("Given object returns false", () => expect(isFunction({})).toBe(false)); expect(isFunction(null)).toBe(false);
test("Given array returns false", () => expect(isFunction([])).toBe(false)); expect(isFunction({})).toBe(false);
expect(isFunction([])).toBe(false);
});
}); });