import { Features } from './environment';
import { Tensor } from './tensor';
import { DataType, TypedArray } from './types';
export declare const WEBGL_ENVS: Features[];
export declare const CPU_ENVS: Features[];
export declare const ALL_ENVS: Features[];
export declare const TEST_EPSILON = 0.001;
export declare function expectArraysClose(actual: Tensor | TypedArray | number[], expected: Tensor | TypedArray | number[] | boolean[], epsilon?: number): void;
export declare function expectArraysEqual(actual: Tensor | TypedArray | number[], expected: Tensor | TypedArray | number[] | boolean[]): void;
export declare function expectNumbersClose(a: number, e: number, epsilon?: number): void;
export declare function expectValuesInRange(actual: Tensor | TypedArray | number[], low: number, high: number): void;
export declare function describeWithFlags(name: string, featuresList: Features[], tests: () => void): void;
export declare function assertIsNan(val: number, dtype: DataType): void;