In the guide for MockK library, the example is not clearing this for me. Here follows the example from the documentation:
class MockedClass {
fun sum(a: Int, b: Int) = a + b
}
val obj = mockk<MockedClass>()
val slot = slot<Int>()
every {
obj.sum(any(), capture(slot))
} answers {
1 + firstArg<Int>() + slot.captured
}
obj.sum(1, 2) // returns 4
obj.sum(1, 3) // returns 5
obj.sum(2, 2) // returns 5
verifyAll {
obj.sum(1, 3)
obj.sum(1, 2)
obj.sum(2, 2)
}
verifySequence {
obj.sum(1, 2)
obj.sum(1, 3)
obj.sum(2, 2)
}
verifyOrder {
obj.sum(1, 2)
obj.sum(2, 2)
}
val obj2 = mockk<MockedClass>()
val obj3 = mockk<MockedClass>()
verify {
listOf(obj2, obj3) wasNot Called
}
The method verifySequence checks that only the specified calls happened and this must be in the same order. Method verifyOrder on the other hand also works if you leave out some calls as you already did in the example (obj.sum(1, 3)). The following will fail because you cannot leave out a call with verifySequence:
verifySequence {
obj.sum(1, 2)
obj.sum(2, 2)
}
Related
I have a list called selected list of type dynamic and it holds a list of objects, each objects contains from a teacher ID & index.
I want to check if this list contains the same Id & index, if it does i want to remove this object from the list.
here is my code ....
void addTeacher(int teacherId, int index) {
if (this.selectedList.contains({ **/// the problem is here** })) {
this.selectedList.remove({teacherId, index});
this.myColor = Colors.grey;
print('removed teacher => ${teacherId.toString()}');
} else {
this.selectedList.add({teacherId, index});
this.myColor = AsasColors().blue;
print('added teacher => ${teacherId.toString()}');
}
notifyListeners();
print(selectedList);
}
how can i achive this ?
Contains and remove use the == operator which in this case will return false because unless you override it for a specific class it will compare by reference.
You can use indexWhere to find out if an item is in a list based on a compare function like that (if the function returns -1 the item is not on the list:
// Index different than -1 means the item is found somewhere in the list
final teacherIndex = this.selectedList.indexWhere((teacher) => teacher['teacherId'] == teacherId);
if (teacherIndex != -1) {
this.selectedList.removeAt(teacherIndex);
this.myColor = Colors.grey;
print('removed teacher => ${teacherId.toString()}');
} else {
...
}
I have implemented it and it worked fine
[The code]
[The output:]
This is the written code:
class Subject {
int? teacherID;
int? subjectID;
Subject(this.teacherID, this.subjectID);
#override
String toString() => "Subject {teacherID: $teacherID, subjectID: $subjectID";
//TODO: Change your needed criteria here..
#override
bool operator ==(Object other) =>
other is Subject &&
teacherID == other.teacherID &&
subjectID == other.subjectID;
}
void addSubject(List<Subject> list, Subject subject) {
if (list.contains(subject)) {
list.remove(subject);
} else {
list.add(subject);
}
}
void main() {
List<Subject> selectedList =
List.generate(10, (index) => Subject(index + 1, index + 1));
print("SelectedList = $selectedList");
addSubject(selectedList, Subject(11, 11));
addSubject(selectedList, Subject(11, 12));
addSubject(selectedList, Subject(12, 11));
addSubject(selectedList, Subject(12, 12));
print("SelectedList2 = $selectedList");
addSubject(selectedList, Subject(12, 12));
print("SelectedList3 = $selectedList");
}
Sincerely, accept the answer if it worked for you.
class CoinData {
var _controller = StreamController<Map<String,dynamic>>();
.....
Stream<Map<String,dynamic>> getAllCurrentRates() {
int numAssets = 0;
int counter = 0;
this.listAllAssets()
.then((list) {
if (list != null) {
numAssets = list.length;
List<Map<String, dynamic>>.from(list)
.where((map) => map["type_is_crypto"] == 1)
.take(3)
.map((e) => e["asset_id"].toString())
.forEach((bitCoin) {
this.getCurrentRate(bitCoin)
.then((rate) => _controller.sink.add(Map<String,dynamic>.from(rate)))
.whenComplete(() {
if (++counter >= numAssets) _controller.close();
});
});
}
});
return _controller.stream;
}
.....
}
The length of returned list is around 2500 and this value is assumed by numAssets, however as you see that list is modified later and therefore its length is less, then the evaluation (++counter >= numAssets) is incorrect. So, is it possible to fix that code maintaining its current structure?
.take(3) is temporal, it shall be removed later.
How can I call an if statement (or any other function) without calling it again, until it's finished executing? I have an update function that calls another function (in another class) but because it executes every update, the user doesn't get the time to actually complete the IF statements (the if statements rely on user input) so therefor it returns nothing or only the first part.
Code (where the update is):
public void Update(){
if(Mouse.isButtonDown(0)){
changeTile();
}
while(Keyboard.next()){
if(Keyboard.getEventKey() == Keyboard.KEY_RIGHT && Keyboard.getEventKeyState()){
moveIndex();
}
if(Keyboard.getEventKey() == Keyboard.KEY_LEFT && Keyboard.getEventKeyState()){
moveIndexBack();
}
}
}
changeTile function:
public void changeTile(){
boolean start = true;
if(start){
while(Mouse.next()){
if(Mouse.getEventButton() == 0 && Mouse.getEventButtonState()){
//system uses tileTypes because player textures are tiletypes itself, so in the end we can let them swim by changing tiletypes
int xCoord = (int) Math.floor(Mouse.getX() / 64);
int yCoord = (int) Math.floor((HEIGHT - Mouse.getY() - 1) / 64);
tileType tile1 = map[xCoord][yCoord].getType();
System.out.println("first tile is set to:" + tile1);
start = false;
}
}
}
if(!start){
while(Mouse.next()){
if(Mouse.getEventButton() == 0 && Mouse.getEventButtonState()){
int xCoord2 = (int) Math.floor(Mouse.getX() / 64);
int yCoord2 = (int) Math.floor((HEIGHT - Mouse.getY() - 1) / 64);
tileType tile2 = map[xCoord2][yCoord2].getType();
System.out.println("second tile is set to:" + tile2);
}
}
}
I'm sure you've been there. You want to say "if flib do this, if flob do that, if flab do diet, etc" where any number of them can be true, then at the end you want an "if you didn't do ANY of them".
For example (the examples below are in Swift, as I've been playing with it, but I think the situation is the same in most languages):
let thing = 101
var isInteresting = false
if (thing % 3 == 0) {
println("\"\(thing)\" is a multiple of three.")
isInteresting = true
}
if (thing > 100) {
println("\"\(thing)\" is greater than one hundred.")
isInteresting = true
}
if (thing > 1000) {
println("\"\(thing)\" is greater than one thousand.")
isInteresting = true
}
if !isInteresting {
println("\"\(thing)\" is boring.")
}
I find keeping track of a boolean to tell me whether I did anything or not kinda ungainly.
The only other way I came up with was this:
let thing = 101
let isAMultipleOfThree = (thing % 3 == 0)
let isGreaterThan100 = (thing > 100)
let isGreaterThan1000 = (thing > 1000)
if isAMultipleOfThree {
println("\"\(thing)\" is a multiple of three.")
}
if isGreaterThan100 {
println("\"\(thing)\" is greater than one hundred.")
}
if isGreaterThan1000 {
println("\"\(thing)\" is greater than one thousand.")
}
if !(isAMultipleOfThree || isGreaterThan100 || isGreaterThan1000 ) {
println("\"\(thing)\" is boring.")
}
but if anything that's worse (if you add a new clause you need to remember to add it in three places.
So my question is, is there a neat, succinct way of doing this?
I'm dreaming of an imaginary switch-like statement:
switchif { //Would have fallthrough where every case condition is checked
case thing % 3 == 0:
println("\"\(thing)\" is a multiple of three.")
case thing >100 :
println("\"\(thing)\" is greater than one hundred.")
case thing > 1000:
println("\"\(thing)\" is greater than one thousand.")
none: //Unlike 'default' this would only occur if none of the above did
println("\"\(thing)\" is boring.")
}
It's a good question that does not have a perfect answer. However, here's one other idea in addition to those you suggest: Encapsulate the testing machinery in a procedure to allow the calling code at least to be a bit more streamlined.
Specifically, for your example, the calling code can be this:
if (! doInterestingStuff(101)) {
println("\"\(thing)\" is boring.");
}
If testing is encapsulated into a procedure:
public boolean doInterestingStuff(int thing) {
var isInteresting = false
if (thing % 3 == 0) {
println("\"\(thing)\" is a multiple of three.")
isInteresting = true
}
if (thing > 100) {
println("\"\(thing)\" is greater than one hundred.")
isInteresting = true
}
if (thing > 1000) {
println("\"\(thing)\" is greater than one thousand.")
isInteresting = true
}
return isInteresting
}
I'm not sure how you'd do this in Swift, but since you didn't give a language tag I'll answer in C++.
The key to this is that && is short circuiting, and the second part won't be evaluated when the first part is false. It's the same idea as your boolean flag, but it's a little more automated.
struct Tracker
{
Tracker() : any(false) { }
bool operator()() { any = true; return true; }
bool any;
};
int thing = 101;
Tracker tracker;
if (thing % 3 == 0 && tracker()) {
printf("\"%d\" is a multiple of three.\n", thing);
}
if (thing > 100 && tracker()) {
printf("\"%d\" is greater than one hundred.\n", thing);
}
if (thing > 1000 && tracker()) {
printf("\"%d\" is greater than one thousand.\n", thing);
}
if (!tracker.any) {
printf("\"%d\" is boring.\n", thing);
}
See it in action: http://ideone.com/6MQYY2
kjhughes' answer inspired me a little:
Perhaps one could write a global function that accepts an indeterminate number of key-value pairs (or even just two element arrays), where the key is a comparison and the value is the statement to run if it's true. Then return false if none of them were run, otherwise true.
Update:
Tried it, it's horrible!
//Function:
func ifNone(ifNoneFunc:()->Void, tests: Bool...)
{
var oneTestPassed = false
for test in tests
{
oneTestPassed |= test
}
if(!oneTestPassed)
{
ifNoneFunc()
}
}
//Example:
let thisThing = 7
ifNone(
{
println("\(thisThing) is boring")
},
{
if(thisThing % 10 == 0)
{
println("\"\(thisThing)\" is a multiple of 10")
return true
}
else
{
return false
}
}(),
{
if(thisThing % 3 == 0)
{
println("\"\(thisThing)\" is a multiple of 3")
return true
}
else
{
return false
}
}(),
{
if(thisThing > 1_000_000)
{
println("\"\(thisThing)\" is over a million!!")
return true
}
else
{
return false
}
}()
)
I have this file called ab.exe it contains this in hexadecimal
0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000BBAAE8CAFDFFFF83C408000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000054AAE8CAFDFFFF83C40800000000000000000000000000000000000000000000000000000000000000000000000000AAE8CAFDFFFF83C4088D000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
I have this code in c++ that is suppose to detect if a string of hexadecimal is in a file or not and if it is add it to the list box.
array<Byte>^ target1 = { 0xAA,0xE8,0xCA,0xFD,0xFF,0xFF,0x83,0xC4,0x08,0x8D };
array<Byte>^ target2 = { 0x54,0xAA,0xE8,0xCA,0xFD,0xFF,0xFF,0x83,0xC4,0x08 };
array<Byte>^ target3 = { 0xBB,0xAA,0xE8,0xCA,0xFD,0xFF,0xFF,0x83,0xC4,0x08 };
int matched1 = 0;
int matched2 = 0;
int matched3 = 0;
FileStream^ fs2 = gcnew FileStream(line, FileMode::Open, FileAccess::Read, FileShare::ReadWrite);
int value;
do
{
value = fs2->ReadByte();
if (value == target1[matched1]) {
matched1++;
}
else
matched1 = 0;
if (value == target2[matched2]) {
matched2++;
}
else
matched2 = 0;
if (value == target3[matched3]) {
matched3++;
}
else
matched3 = 0;
if(matched1 == target1->Length)
{
listBox1->Items->Add(line + "1");
}
if(matched2 == target2->Length)
{
listBox1->Items->Add(line + "2");
}
if(matched3 == target3->Length)
{
listBox1->Items->Add(line + "3");
}
} while (value != -1);
fs2->Close();
the problem is that it only adds line + 3 to the list box and not line + 1 or line + 2 to the list box
I do not know why that is because all 3 of the strings are in the file so they all should be added to the list box. for some reason only the last one is being added because I tried just having 2 and the second one got added.can someone show me why they are not all being added to the list box.
thanks
Update1
after playing around with it some more it is not the last target that gets added each time, It is the first string that appears in the file that gets added. I stepped through the program using message boxes and what is happening is lets say 54AAE8CAFDFFFF83C408 is the first string to appear in the file then line + 2 will be added, but then for some reason the matched integer for all 3 stop counting they just = 0 the rest of the file. can someone explain to me why that is and how to fix it.
Update2
here is the answer to the problem. all I needed to do was just add a matched = 0; after each add to list box command.
listBox1->Items->Add(line + "1");
matched1 = 0;
listBox1->Items->Add(line + "2");
matched2 = 0;
listBox1->Items->Add(line + "3");
matched3 = 0;
It seems to me that after the first matching of one pattern (here target3) you read beyond last byte of target3 (because of matched3++), this may cause undesired behavior.
Update1:
if(matched1 == target1->Length)
{
matched1 = 0; // pattern matched so reset counter
...
}