Add missing typings of helpers, add automatic test

.gitignore

@@ -27,3 +27,6 @@ docs/api
 *.log
 *.swp
 *.stackdump
+
+# Generated
+/types/tests/autogen*.ts

package.json

@@ -44,7 +44,7 @@
     "lint-js": "eslint \"src/**/*.js\" \"test/**/*.js\" \"docs/**/*.js\"",
     "lint-md": "eslint \"**/*.md\"",
     "lint-tsc": "tsc",
-    "lint-types": "eslint \"types/**/*.ts\" && tsc -p types/tests/",
+    "lint-types": "eslint \"types/**/*.ts\" && node -r esm types/tests/autogen.js && tsc -p types/tests/",
     "lint": "concurrently \"npm:lint-*\"",
     "test": "npm run lint && cross-env NODE_ENV=test karma start --auto-watch --single-run --coverage --grep"
   },
@@ -70,6 +70,7 @@
     "eslint-plugin-es": "^4.1.0",
     "eslint-plugin-html": "^6.1.2",
     "eslint-plugin-markdown": "^2.1.0",
+    "esm": "^3.2.25",
     "glob": "^7.1.6",
     "jasmine": "^3.7.0",
     "jasmine-core": "^3.7.1",

types/geometric.d.ts

@@ -11,3 +11,27 @@ export interface Point {
   x: number;
   y: number;
 }
+
+export type TRBL = {
+  top: number;
+  right: number;
+  bottom: number;
+  left: number;
+}
+
+export type TRBLCorners = {
+  topLeft: number;
+  topRight: number;
+  bottomLeft: number;
+  bottomRight: number;
+};
+
+export type CornerRadius = number | Partial<TRBLCorners>;
+
+export type RoundedRect = {
+  x: number;
+  y: number;
+  w: number;
+  h: number;
+  radius?: CornerRadius
+}

types/helpers/helpers.canvas.d.ts

@@ -1,6 +1,6 @@
 import { PointStyle } from '../index.esm';
 import { Color } from '../color';
-import { ChartArea } from '../geometric';
+import { ChartArea, RoundedRect } from '../geometric';
 import { CanvasFontSpec } from './helpers.options';
 
 export function clearCanvas(canvas: HTMLCanvasElement, ctx?: CanvasRenderingContext2D): void;
@@ -97,3 +97,5 @@ export function renderText(
 	font: CanvasFontSpec,
 	opts?: RenderTextOpts
 ): void;
+
+export function addRoundedRectPath(ctx: CanvasRenderingContext2D, rect: RoundedRect): void;

types/helpers/helpers.core.d.ts

@@ -38,13 +38,26 @@ export function isObject(value: unknown): value is AnyObject;
  * @returns {boolean}
  */
 export function isFinite(value: unknown): value is number;
+
+/**
+ * Returns `value` if finite, else returns `defaultValue`.
+ * @param {*} value - The value to return if defined.
+ * @param {*} defaultValue - The value to return if `value` is not finite.
+ * @returns {*}
+ */
+export function finiteOrDefault(value: unknown, defaultValue: number): number;
+
 /**
  * Returns `value` if defined, else returns `defaultValue`.
  * @param {*} value - The value to return if defined.
  * @param {*} defaultValue - The value to return if `value` is undefined.
  * @returns {*}
  */
 export function valueOrDefault<T>(value: T | undefined, defaultValue: T): T;
+
+export function toPercentage(value: number | string, dimesion: number): number;
+export function toDimension(value: number | string, dimension: number): number;
+
 /**
  * Calls `fn` with the given `args` in the scope defined by `thisArg` and returns the
  * value returned by `fn`. If `fn` is not a function, this method returns undefined.
@@ -137,4 +150,8 @@ export function mergeIf<T>(target: T, source: AnyObject[]): AnyObject;
 
 export function resolveObjectKey(obj: AnyObject, key: string): AnyObject;
 
+export function defined(value: unknown): boolean;
+
+export function isFunction(value: unknown): boolean;
+
 export function setsEqual(a: Set<unknown>, b: Set<unknown>): boolean;

types/helpers/helpers.dom.d.ts

@@ -15,3 +15,4 @@ export function retinaScale(
   forceRatio: number,
   forceStyle?: boolean
 ): void;
+export function readUsedSize(element: HTMLElement, property: 'width' | 'height'): number | undefined;

types/helpers/helpers.math.d.ts

@@ -3,6 +3,7 @@ export function isNumber(v: unknown): boolean;
 export function almostEquals(x: number, y: number, epsilon: number): boolean;
 export function almostWhole(x: number, epsilon: number): number;
 export function sign(x: number): number;
+export function niceNum(range: number): number;
 export function toRadians(degrees: number): number;
 export function toDegrees(radians: number): number;
 /**

types/helpers/helpers.options.d.ts

@@ -1,3 +1,4 @@
+import { TRBL, TRBLCorners } from '../geometric';
 import { FontSpec } from '../index.esm';
 
 export interface CanvasFontSpec extends FontSpec {
@@ -20,6 +21,9 @@ export function toFont(options: Partial<FontSpec>): CanvasFontSpec;
  */
 export function toLineHeight(value: string, size: number): number;
 
+export function toTRBL(value: number | Partial<TRBL>): TRBL;
+export function toTRBLCorners(value: number | Partial<TRBLCorners>): TRBLCorners;
+
 /**
  * Converts the given value into a padding object with pre-computed width/height.
  * @param {number|object} value - If a number, set the value to all TRBL component;

types/tests/autogen.js

@@ -0,0 +1,22 @@
+import * as fs from 'fs';
+import * as path from 'path';
+import * as helpers from '../../src/helpers/index.js';
+
+let fd;
+
+try {
+  const fn = path.resolve(__dirname, 'autogen_helpers.ts');
+  fd = fs.openSync(fn, 'w+');
+  fs.writeSync(fd, 'import * as helpers from \'../helpers\';\n\n');
+
+  fs.writeSync(fd, 'const testKeys = [];\n');
+  for (const key of Object.keys(helpers)) {
+    if (key[0] !== '_' && typeof helpers[key] === 'function') {
+      fs.writeSync(fd, `testKeys.push(helpers.${key});\n`);
+    }
+  }
+} finally {
+  if (fd !== undefined) {
+    fs.closeSync(fd);
+  }
+}