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catch.test.js
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catch.test.js
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describe('testing catchers', () => {
var VERSION = process.env.npm_package_version;
var TYPE = process.env.RAFX_TYPE;
beforeAll(async () => {
await page.addScriptTag({path:'./dist/rafx.v' + VERSION + '.' + TYPE + '.js'})
});
test('basic catch test - does it catch?', async () => {
const result = await page.evaluate(function(){
return new Promise(function(resolve){
rafx
.async(5)
.skipFrames(60)
.then((v)=>{throw new Error(v)})
.skipFrames(60)
.then(function(v){return v+1;})
.then(function(v){return v+1;})
.then(function(v){return v+1;})
.then(function(v){throw new Error(v+1);})
.catch(function(e){resolve(+e.message);})
});
});
expect(result).toEqual(5);
});
test('can the catch be overridden?', async () => {
const result = await page.evaluate(function(){
return new Promise(function(resolve){
rafx
.async(5)
.skipFrames(60)
.then((v)=>{throw new Error(v)})
.skipFrames(60)
.catch(function(e){resolve(+e.message);})
.then(function(v){return v+1;})
.then(function(v){return v+1;})
.then(function(v){return v+1;})
.then(function(v){throw new Error(v+1);})
.catch(function(e){resolve(+e.message + 1);})
});
});
expect(result).toEqual(6);
});
test(
'on nested recursions a single object is thrown'
+ ' and reported on only user attached catch clauses;'
+ ' catch clauses can still be overridden;'
+ ' catch execution order should be innermost to outermost',
async () => {
const result = await page.evaluate(function(){
return new Promise(function(resolve){
const errors = [],
catchExecutionOrder = [];
rafx
.async(3)
.skipFrames(30)
.catch(function(e){ //should be overridden
errors.push(e);
catchExecutionOrder.push(NaN);
})
.recurse(function(v,o){
++o.i;
return rafx
.async(o.i)
.skipFrames(5)
.recurse(function(v,o){
--o.i;
return v;
},{i:5})
.until(function(v,o){
return o.i <= 0;
})
.then(function(v){
return rafx
.async(v)
.recurse(function(v,o){
--o.x;
return v;
},{x:5})
.until(function(v,o){
return o.x <= 0;
})
.filter(function(v){
return typeof v === "number";
})
.then(function(v){
return rafx
.async(5)
.skipFrames(10)
.toBool(function(v){return v - 1;})
.toBool()
.filter(function(v){
return typeof v !== "boolean" && v === false;
})
.then(function(){
return v;
}).catch(function(e){
errors.push(e);
catchExecutionOrder.push(1);
});
}).catch(function(e){
errors.push(e);
catchExecutionOrder.push(2);
});
}).catch(function(e){
errors.push(e);
catchExecutionOrder.push(3);
});
},{i:-1})
.until(function(v){
return v > 5;
}).then(function(v){
return v;
}).catch(function(e){ //last catch to execute
errors.push(e);
catchExecutionOrder.push(4);
resolve(
errors.length === 4
&& errors.every((d,i)=> d === errors[Math.min(i+1,errors.length - 1)])
&& catchExecutionOrder.every((d,i,a)=> d <= (a[i+1] || d))
);
})
});
});
expect(result).toBe(true);
});
});