node/test/mjsunit/test-assert.js

process.mixin(require("./common"));

//strangely meta, no?

var a = require('assert');


function makeBlock(f){
    var args = Array.prototype.slice.call(arguments,1);
    return function(){
        return f.apply(this,args);
    }
}

assert.ok(a.AssertionError instanceof Error, "a.AssertionError instanceof Error")

assert.throws(makeBlock(a.ok, false), a.AssertionError, "ok(false)");
assert.doesNotThrow(makeBlock(a.ok, true), a.AssertionError, "ok(true)");
assert.doesNotThrow(makeBlock(a.ok, "test"),"ok('test')");

assert.throws(makeBlock(a.equal, true, false), a.AssertionError, 'equal');
assert.doesNotThrow(makeBlock(a.equal, null, null), 'equal');
assert.doesNotThrow(makeBlock(a.equal, undefined, undefined), 'equal');
assert.doesNotThrow(makeBlock(a.equal, null, undefined), 'equal');
assert.doesNotThrow(makeBlock(a.equal, true, true), 'equal');
assert.doesNotThrow(makeBlock(a.equal, 2, "2"), 'equal');

assert.doesNotThrow(makeBlock(a.notEqual, true, false), 'notEqual');
assert.throws(makeBlock(a.notEqual, true, true), a.AssertionError, 'notEqual');

assert.throws(makeBlock(a.strictEqual, 2, "2"), a.AssertionError, 'strictEqual');
assert.throws(makeBlock(a.strictEqual, null, undefined), a.AssertionError, 'strictEqual');

assert.doesNotThrow(makeBlock(a.notStrictEqual, 2, "2"), 'notStrictEqual');

//deepEquals joy!
//7.2
assert.doesNotThrow(makeBlock(a.deepEqual, new Date(2000,3,14), new Date(2000,3,14)), 'deepEqual date');
assert.throws(      makeBlock(a.deepEqual, new Date(), new Date(2000,3,14)), a.AssertionError, 'deepEqual date');
//7.3
assert.doesNotThrow(makeBlock(a.deepEqual, 4, "4"), 'deepEqual == check');
assert.doesNotThrow(makeBlock(a.deepEqual, true, 1), 'deepEqual == check');
assert.throws(      makeBlock(a.deepEqual, 4, "5"), a.AssertionError, 'deepEqual == check');
//7.4
// having the same number of owned properties && the same set of keys
assert.doesNotThrow(makeBlock(a.deepEqual, {a:4}, {a:4}));
assert.doesNotThrow(makeBlock(a.deepEqual, {a:4,b:"2"}, {a:4,b:"2"}));
assert.doesNotThrow(makeBlock(a.deepEqual, [4], ["4"]));
assert.throws(      makeBlock(a.deepEqual, {a:4}, {a:4,b:true}), a.AssertionError);
assert.doesNotThrow(makeBlock(a.deepEqual, ["a"], {0:"a"}));
//(although not necessarily the same order),
assert.doesNotThrow(makeBlock(a.deepEqual, {a:4,b:"1"}, {b:"1",a:4}));
var a1 = [1,2,3];
var a2 = [1,2,3];
a1.a = "test";
a1.b = true;
a2.b = true;
a2.a = "test"
assert.throws(      makeBlock(a.deepEqual, Object.keys(a1), Object.keys(a2)), a.AssertionError);
assert.doesNotThrow(makeBlock(a.deepEqual, a1, a2));

// having an identical prototype property
var nbRoot = {
    toString: function(){return this.first+' '+this.last;}
}
var nameBuilder = function(first,last){
    this.first = first;
    this.last = last;
    return this;
}
nameBuilder.prototype = nbRoot;
var nameBuilder2 = function(first,last){
    this.first = first;
    this.last = last;
    return this;
}
nameBuilder2.prototype = nbRoot;
var nb1 = new nameBuilder('Ryan', 'Dahl');
var nb2 = new nameBuilder2('Ryan','Dahl');

assert.doesNotThrow(makeBlock(a.deepEqual, nb1, nb2));

nameBuilder2.prototype = Object;
nb2 = new nameBuilder2('Ryan','Dahl');
assert.throws(      makeBlock(a.deepEqual, nb1, nb2), a.AssertionError);

//String literal + object blew up my implementation...
assert.throws(      makeBlock(a.deepEqual, 'a', {}), a.AssertionError);

//Testing the throwing
function thrower(errorConstructor){
    throw new errorConstructor('test');
}
aethrow = makeBlock(thrower, a.AssertionError);
aethrow = makeBlock(thrower, a.AssertionError);
//the basic calls work
assert.throws(      makeBlock(thrower, a.AssertionError), a.AssertionError, 'message');
assert.throws(      makeBlock(thrower, a.AssertionError), a.AssertionError);
assert.throws(      makeBlock(thrower, a.AssertionError));
//if not passing an error, catch all.
assert.throws(      makeBlock(thrower, TypeError));
//when passing a type, only catch errors of the appropriate type
var threw = false;
try{
    a.throws(      makeBlock(thrower, TypeError), a.AssertionError);
}catch (e){
    threw = true;
    assert.ok(e instanceof TypeError, 'type');
}
assert.equal(true,threw,'a.throws with an explicit error is eating extra errors', a.AssertionError);
threw = false;
//doesNotThrow should pass through all errors
try{
    a.doesNotThrow(makeBlock(thrower, TypeError), a.AssertionError);
}catch(e){
    threw = true
    assert.ok(e instanceof TypeError);
}
assert.equal(true,threw,'a.doesNotThrow with an explicit error is eating extra errors');
//the key difference is that throwing our correct error makes an assertion error
try{
    a.doesNotThrow(makeBlock(thrower, TypeError), TypeError);
}catch(e){
    threw = true
    assert.ok(e instanceof a.AssertionError);
}
assert.equal(true,threw,'a.doesNotThrow is not catching type matching errors');