KLambdaTest.java 文件源码

private static Matcher within(double epsilon, double value) {
    return new BaseMatcher() {
        @Override
        public void describeTo(Description description) {
            description.appendText("within ")
                    .appendText(Double.toString(epsilon))
                    .appendText(" of ")
                    .appendText(Double.toString(value));
        }

        @Override
        public boolean matches(Object item) {
            return item instanceof Double && Math.abs(((Double)item) - value) < epsilon;
        }
    };
}