array-methods-testing/tinytest.js at master · Clickys/array-methods-testing · GitHub

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/**
 * Very simple in-browser unit-test library, with zero deps.
 *
 * Background turns green if all tests pass, otherwise red.
 * View the JavaScript console to see failure reasons.
 *
 * Example:
 *
 * adder.js (code under test)
 *
 * function add(a, b) {
 * return a + b;
 * }
 *
 * adder-test.html (tests - just open a browser to see results)
 *
 * <script src="tinytest.js"></script>
 * <script src="adder.js"></script>
 * <script>
 *
 * tests({
 *
 * 'adds numbers': function() {
 * eq(6, add(2, 4));
 * eq(6.6, add(2.6, 4));
 * },
 *
 * 'subtracts numbers': function() {
 * eq(-2, add(2, -4));
 * },
 *
 * });
 * </script>
 *
 * That's it. Stop using over complicated frameworks that get in your way.
 *
 * -Joe Walnes
 * MIT License. See https://github.com/joewalnes/jstinytest/
 */
constsimpleTestHelper={
renderTestingCasesToDom: function(tests,failures){
letnumberOfTestCases=Object.keys(tests).length;
lettemplateString=`Ran ${numberOfTestCases} tests: ${numberOfTestCases-
failures} successes, ${failures} failures`;

letelement=document.createElement('h1');
element.textContent=templateString;
document.body.appendChild(element);
}
};

constTinyTest={
run: function(tests){
letfailures=0;
for(lettestNameintests){
lettestAction=tests[testName];
try{
testAction();
console.log(
'%c'+testName,
'color: green; font-weight: bold;'
);
}catch(e){
failures++;
console.groupCollapsed(
'%c'+testName,
'color: red; font-weight: bold;'
);
console.error('%c'+e.stack,'color: red;');
console.trace('%c'+'Stack trace','color: purple;');
console.groupEnd();
}
}
setTimeout(function(){
// Give document a chance to complete
if(window.document&&document.body){
document.body.style.backgroundColor=
failures==0 ? '#99ff99' : '#ff9999';
simpleTestHelper.renderTestingCasesToDom(tests,failures);
}
},0);
},

fail: function(msg){
thrownewError('fail(): '+msg);
},

assert: function(value,msg){
if(!value){
thrownewError('assert(): '+msg);
}
},

assertEquals: function(expected,actual){
if(expected!=actual){
thrownewError(
'assertEquals() "'+expected+'" != "'+actual+'"'
);
}
},

assertStrictEquals: function(expected,actual){
if(expected!==actual){
thrownewError(
'assertStrictEquals() "'+expected+'" !== "'+actual+'"'
);
}
}
};

constfail=TinyTest.fail,
assert=TinyTest.assert,
assertEquals=TinyTest.assertEquals,
eq=TinyTest.assertEquals,// alias for assertEquals
assertStrictEquals=TinyTest.assertStrictEquals,
tests=TinyTest.run;