How to test condition with Jest in React-Native app












0














I have to test this line of condition, but I have no idea of how can I do, everything I try to do gives error or doesn't change my percent cover test.
Basically, if there is no order, it haves to appear an message ('There is no orders') in other screen (in a list), or it haves to appear ('Received orders').



It is this specific condition, if you can help me:



       .then((responseJson) => {
if (responseJson.length == 0) {
this.setState({ received_order_message: 'There is no orders' });
}
else {
this.setState({ received_order_message: 'There is orders' });
}
})


Here is a part of the code of interest:



class OrderedProducts extends Component {
constructor(props) {
super(props);
this.state = {
orders: [''],
buyer_orders: [''],
refreshing: false,
my_order_message: 'My orders',
received_order_message: 'Received orders',
};
}

componentDidMount(){
this.loadOrders();
}

loadOrders = async () => {
const {state} = this.props.navigation;
var token = state.params ? state.params.token : undefined;
var user = jwt_decode(token);

const orders_screen_path = `${process.env.ORDERS}/api/orders_screen/`;

fetch(orders_screen_path, {
method: 'POST',
headers: {
'Content-Type': 'application/json',
},
body: JSON.stringify({
'user_id': user.user_id,
'token': token,
}),
})
.then((response) => response.json())
.then((responseJson) => {
console.log(responseJson);
if (responseJson.length == 0) {
this.setState({ received_order_message: 'There is no orders' });
}
else {
this.setState({ received_order_message: 'There is orders' });
}
if (responseJson.length > 1) {
responseJson.sort((order1, order2) => {
return (order1.date - order2.date);
}).reverse();
}
this.setState({ orders: responseJson });
})
.catch((error) => {
console.error(error);
});


Thanks.










share|improve this question
























  • have you handled mocking fetch() call? you need to fake response with empty and non-empty list to cover this block
    – skyboyer
    Nov 21 at 7:09










  • Yess, I've made it, but this line in specif I couldn't pass.. I'll try to make what you said
    – yoongi_s
    Nov 22 at 13:11
















0














I have to test this line of condition, but I have no idea of how can I do, everything I try to do gives error or doesn't change my percent cover test.
Basically, if there is no order, it haves to appear an message ('There is no orders') in other screen (in a list), or it haves to appear ('Received orders').



It is this specific condition, if you can help me:



       .then((responseJson) => {
if (responseJson.length == 0) {
this.setState({ received_order_message: 'There is no orders' });
}
else {
this.setState({ received_order_message: 'There is orders' });
}
})


Here is a part of the code of interest:



class OrderedProducts extends Component {
constructor(props) {
super(props);
this.state = {
orders: [''],
buyer_orders: [''],
refreshing: false,
my_order_message: 'My orders',
received_order_message: 'Received orders',
};
}

componentDidMount(){
this.loadOrders();
}

loadOrders = async () => {
const {state} = this.props.navigation;
var token = state.params ? state.params.token : undefined;
var user = jwt_decode(token);

const orders_screen_path = `${process.env.ORDERS}/api/orders_screen/`;

fetch(orders_screen_path, {
method: 'POST',
headers: {
'Content-Type': 'application/json',
},
body: JSON.stringify({
'user_id': user.user_id,
'token': token,
}),
})
.then((response) => response.json())
.then((responseJson) => {
console.log(responseJson);
if (responseJson.length == 0) {
this.setState({ received_order_message: 'There is no orders' });
}
else {
this.setState({ received_order_message: 'There is orders' });
}
if (responseJson.length > 1) {
responseJson.sort((order1, order2) => {
return (order1.date - order2.date);
}).reverse();
}
this.setState({ orders: responseJson });
})
.catch((error) => {
console.error(error);
});


Thanks.










share|improve this question
























  • have you handled mocking fetch() call? you need to fake response with empty and non-empty list to cover this block
    – skyboyer
    Nov 21 at 7:09










  • Yess, I've made it, but this line in specif I couldn't pass.. I'll try to make what you said
    – yoongi_s
    Nov 22 at 13:11














0












0








0







I have to test this line of condition, but I have no idea of how can I do, everything I try to do gives error or doesn't change my percent cover test.
Basically, if there is no order, it haves to appear an message ('There is no orders') in other screen (in a list), or it haves to appear ('Received orders').



It is this specific condition, if you can help me:



       .then((responseJson) => {
if (responseJson.length == 0) {
this.setState({ received_order_message: 'There is no orders' });
}
else {
this.setState({ received_order_message: 'There is orders' });
}
})


Here is a part of the code of interest:



class OrderedProducts extends Component {
constructor(props) {
super(props);
this.state = {
orders: [''],
buyer_orders: [''],
refreshing: false,
my_order_message: 'My orders',
received_order_message: 'Received orders',
};
}

componentDidMount(){
this.loadOrders();
}

loadOrders = async () => {
const {state} = this.props.navigation;
var token = state.params ? state.params.token : undefined;
var user = jwt_decode(token);

const orders_screen_path = `${process.env.ORDERS}/api/orders_screen/`;

fetch(orders_screen_path, {
method: 'POST',
headers: {
'Content-Type': 'application/json',
},
body: JSON.stringify({
'user_id': user.user_id,
'token': token,
}),
})
.then((response) => response.json())
.then((responseJson) => {
console.log(responseJson);
if (responseJson.length == 0) {
this.setState({ received_order_message: 'There is no orders' });
}
else {
this.setState({ received_order_message: 'There is orders' });
}
if (responseJson.length > 1) {
responseJson.sort((order1, order2) => {
return (order1.date - order2.date);
}).reverse();
}
this.setState({ orders: responseJson });
})
.catch((error) => {
console.error(error);
});


Thanks.










share|improve this question















I have to test this line of condition, but I have no idea of how can I do, everything I try to do gives error or doesn't change my percent cover test.
Basically, if there is no order, it haves to appear an message ('There is no orders') in other screen (in a list), or it haves to appear ('Received orders').



It is this specific condition, if you can help me:



       .then((responseJson) => {
if (responseJson.length == 0) {
this.setState({ received_order_message: 'There is no orders' });
}
else {
this.setState({ received_order_message: 'There is orders' });
}
})


Here is a part of the code of interest:



class OrderedProducts extends Component {
constructor(props) {
super(props);
this.state = {
orders: [''],
buyer_orders: [''],
refreshing: false,
my_order_message: 'My orders',
received_order_message: 'Received orders',
};
}

componentDidMount(){
this.loadOrders();
}

loadOrders = async () => {
const {state} = this.props.navigation;
var token = state.params ? state.params.token : undefined;
var user = jwt_decode(token);

const orders_screen_path = `${process.env.ORDERS}/api/orders_screen/`;

fetch(orders_screen_path, {
method: 'POST',
headers: {
'Content-Type': 'application/json',
},
body: JSON.stringify({
'user_id': user.user_id,
'token': token,
}),
})
.then((response) => response.json())
.then((responseJson) => {
console.log(responseJson);
if (responseJson.length == 0) {
this.setState({ received_order_message: 'There is no orders' });
}
else {
this.setState({ received_order_message: 'There is orders' });
}
if (responseJson.length > 1) {
responseJson.sort((order1, order2) => {
return (order1.date - order2.date);
}).reverse();
}
this.setState({ orders: responseJson });
})
.catch((error) => {
console.error(error);
});


Thanks.







reactjs react-native jestjs babel-jest






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 22 at 13:20

























asked Nov 21 at 4:52









yoongi_s

74




74












  • have you handled mocking fetch() call? you need to fake response with empty and non-empty list to cover this block
    – skyboyer
    Nov 21 at 7:09










  • Yess, I've made it, but this line in specif I couldn't pass.. I'll try to make what you said
    – yoongi_s
    Nov 22 at 13:11


















  • have you handled mocking fetch() call? you need to fake response with empty and non-empty list to cover this block
    – skyboyer
    Nov 21 at 7:09










  • Yess, I've made it, but this line in specif I couldn't pass.. I'll try to make what you said
    – yoongi_s
    Nov 22 at 13:11
















have you handled mocking fetch() call? you need to fake response with empty and non-empty list to cover this block
– skyboyer
Nov 21 at 7:09




have you handled mocking fetch() call? you need to fake response with empty and non-empty list to cover this block
– skyboyer
Nov 21 at 7:09












Yess, I've made it, but this line in specif I couldn't pass.. I'll try to make what you said
– yoongi_s
Nov 22 at 13:11




Yess, I've made it, but this line in specif I couldn't pass.. I'll try to make what you said
– yoongi_s
Nov 22 at 13:11

















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