Created
February 20, 2020 01:42
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average drill
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function average(numbers) { | |
let sum = numbers[0]; | |
for (i=1; i<numbers.length; i++) { | |
sum += numbers[i]; | |
} | |
let average = sum / numbers.length; | |
return average; | |
} | |
/* From here down, you are not expected to | |
understand.... for now :) | |
Nothing to see here! | |
*/ | |
let numbers = [1,2,3]; | |
console.log(average(numbers)); | |
function testFunctionWorks(fn, input, expected) { | |
if (fn(input) === expected) { | |
console.log('SUCCESS: `' + fn.name + '` works on `[' + input + ']`'); | |
return true; | |
} else { | |
console.log( | |
'FAILURE: `' + | |
fn.name + | |
'([' + | |
input + | |
'])` should be ' + | |
expected + | |
' but was ' + | |
fn(input) | |
); | |
return false; | |
} | |
} | |
(function runTests() { | |
const numList1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]; | |
const correctAns1 = 5.5; | |
const numList2 = [0, -1, 1]; | |
const correctAns2 = 0; | |
const testResults = [ | |
testFunctionWorks(average, numList1, correctAns1), | |
testFunctionWorks(average, numList2, correctAns2), | |
]; | |
const numPassing = testResults.filter(function(result) { | |
return result; | |
}).length; | |
console.log(numPassing + ' out of ' + testResults.length + ' tests passing.'); | |
})(); |
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