export class Matchers<T> {
    private actual: T
    constructor(actual: T) {
        this.actual = actual
    }
    toEqual(expected: T) {
        if (JSON.stringify(expected) == JSON.stringify(this.actual)) {
            return
        }
        // #ifndef APP-IOS
        throw new Error(format(expected, this.actual))
        // #endif
        // #ifdef APP-IOS
        NSException(name = NSExceptionName.internalInconsistencyException, reason = format(expected, this.actual)).raise()
        // #endif
    }
	
	toEqualNumber(expected: T) {
		// #ifndef APP-IOS
			if (expected == this.actual) {
				return
			}
		// #endif
		// #ifdef APP-IOS
			this.toEqual(expected)
		// #endif
	}
}
/**
 * 数值对比器
 */
export class NumberMatchers {
	
    private actual: number
    constructor(actual: number) {
        this.actual = actual
    }
	/**
	 * 用于浮点数对比,只比较小数点后5位，web/app 浮点储存位数不同
	 */
	toEqualDouble(expected:number) {
		
		let absDiff = Math.abs(this.actual - expected)
	    if (absDiff < 0.00001) {
	        return
	    }
	    // #ifndef APP-IOS
	    throw new Error(format(expected, this.actual))
	    // #endif
	}
	

}


function format(expected: any | null, actual: any | null): string {
    return `expected:<${expected}> but was:<${actual}>`
}