0046【Edabit ★☆☆☆☆☆】【长方形面积】Area of a Rectangle

0046【Edabit ★☆☆☆☆☆】【长方形面积】Area of a Rectangle

algebra geometry math

Instructions

Create a function that calculates the area of a rectangle. If the arguments are invalid, your function must return -1.

Examples

area(3, 4) // 12
area(10, 11) // 110
area(-1, 5) // -1
area(0, 2) // -1
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Notes

• N/A

Solutions

function area(h, w) {
    if( h <= 0 || w <=0 ){
        return -1;
    }
    return  w*h;
}
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TestCases

let Test = (function(){
    return {
        assertEquals:function(actual,expected){
            if(actual !== expected){
                let errorMsg = `actual is ${actual},${expected} is expected`;
                throw new Error(errorMsg);
            }
        },
        assertSimilar:function(actual,expected){
            if(actual.length != expected.length){
                throw new Error(`length is not equals, ${actual},${expected}`);
            }
            for(let a of actual){
                if(!expected.includes(a)){
                    throw new Error(`missing ${a}`);
                }
            }
        }
    }
})();

Test.assertEquals(area(5, 3), 15)
Test.assertEquals(area(8, 5), 40)
Test.assertEquals(area(5, 4), 20)
Test.assertEquals(area(2, 3), 6)
Test.assertEquals(area(10000, 10000), 100000000)
Test.assertEquals(area(-2, -5), -1)
Test.assertEquals(area(0, 3), -1)
Test.assertEquals(area(5, -3), -1)
Test.assertEquals(area(0, 1), -1)
Test.assertEquals(area(-1, 0), -1)
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