I have a type:
type button = JSX.Element | null;
and a function:
const getFirstButton = (buttonArray: button[], first: boolean) => {
if (first) {
return buttonArray[1];
}
return buttonArray.find(b => b !== null);
};
here is my test
test('getFirstButton', () => {
const buttons = // what goes here?
expect(getFirstButton(buttons, false)).toContain('button_1');
});
I need help with the second line on the test. How do i handle this?
Is this even possible?
Note: my test file is test.ts and I don't want to change it .tsx
JSX.Element is an object created by JSX syntax, i.e. React.createElement.
It can be:
const buttons = [null, null, <p/>, <div/>];
expect(getFirstButton(buttons, false)).toBe(buttons[2]);
Notice that JavaScript arrays are zero-based, so buttonArray[1] is possibly a mistake that will be detected when covering if (first) condition.
Related
I'm trying to write an eslint rule that enforces making sure the name property is defined on any classes that extend from other Error/Exception named classes (and fixes them).
As far as I can tell, it works in the astexplorer.net individually, but when I'm running it alongside other rules, it ends up getting ran multiple times, so the name property ends up being repeated multiple times in the resulting "fixed" file.
Is there anything in particular I can do to prevent it being run multiple times? I'm assuming what's happening is that it's inserting my name = 'ClassName';, then prettier is needing to reformat the code, which it does, but then maybe it's re-running my rule? I'm not sure.
Rule/fix code shown below. I've tried things like using *fix and yield, but that doesn't seem to help either (see commented code below, based on information in the eslint documentation)
module.exports = {
meta: {
hasSuggestions: true,
type: 'suggestion',
docs: {},
fixable: 'code',
schema: [], // no options,
},
create: function (context) {
return {
ClassDeclaration: function (node) {
const regex = /.*(Error|Exception)$/;
// If the parent/superClass is has "Error" or "Exception" in the name
if (node.superClass && regex.test(node.superClass.name)) {
let name = null;
const className = node.id.name;
// Test class object name
if (!regex.test(className)) {
context.report({
node: node,
message: 'Error extensions must end with "Error" or "Exception".',
});
}
// Find name ClassProperty
node.body.body.some(function (a) {
if (a.type === 'ClassProperty' && a.key.name === 'name') {
name = a.value.value;
return true;
}
});
// Name property is required
if (!name) {
context.report({
node: node,
message: 'Error extensions should have a descriptive name',
fix(fixer) {
return fixer.replaceTextRange(
[node.body.range[0]+1, node.body.range[0]+1],
`name = '${className}';`
);
},
// *fix(fixer) {
// name = className;
// yield fixer.replaceTextRange(
// [node.body.range[0]+1, node.body.range[0]+1],
// `name = '${className}';`
// );
//
// // extend range of the fix to the range of `node.parent`
// yield fixer.insertTextBefore(node.body, '');
// yield fixer.insertTextAfter(node.body, '');
// },
});
}
}
},
};
},
};
Turns out I had the AST Explorer set to the wrong parser, so it was showing me the wrong string name for the ClassProperty node. I should have been using PropertyDefinition instead.
Inside a useEffect hook I get the bounding top of masterRef. Then I compare masterRef's top with some divs in the parentRef. If a div's top is the same as the masterRef's top, a class is added, if not, it will be removed.
useEffect(() => {
const masterTop = masterRef.current.getBoundingClientRect().top;
let children = parentRef.current.children;
Array.from(children).forEach((child) => {
const childTop = child.getBoundingClientRect().top;
if (childTop !== divTop) {
child.classList.add("greyout");
} else {
child.classList.remove("greyout");
}
});
}
}, []);
I have found mocking getBoundingClientRect that returns only one value. To test the above, it requires returning at least two different values. How can this be done?
I am trying to get a text from an element with Cypress in the first test from the first domain and then type it in the second test in another domain, here is a code
I have to grab code from h4.
I implemented next part of code:
get studentCouponValue() {
return cy.get('h4').then(($span) => {
const couponValue = $span.text();
cy.log(couponValue);
})
}
in logs, I see the correct coupon's value, but when I am trying to type it into the field I get an error
The chain approach doesn't fit my expectation, cause i am going to use it in different tests.
Try this:
get studentCouponValue() {
return cy.get('h4').then(($span) => {
const couponValue = $span.innerText;
cy.log(couponValue);
})
}
i resolved
initStudentCouponValue() {
const self = this;
return cy.get('main > .container-fluid').find('h4').then((span) => {
self.couponValue = span.text();
cy.log('First log '+ self.couponValue);
return new Cypress.Promise((resolve) => {
return resolve(self.couponValue);
});
});
}
getStudentCouponValue() {
return this.couponValue;
}
in the test where we want to use value
let couponValue;
admin.initStudentCouponValue().then(() => {
couponValue = admin.getStudentCouponValue()
});
and later we can use
coupoValue
for inputs
Using TipTap, I'm trying to avoid adding a <br />, but create a <p></p> instead, with the focus inside that <p>|</p> when the user hit shift-Enter but I can't make it work.
Here's what I did so far:
new (class extends Extension {
keys () {
return {
'Shift-Enter' (state, dispatch, view) {
const { schema, tr } = view.state
const paragraph = schema.nodes.paragraph
console.log(tr.storedMarks)
const transaction = tr.deleteSelection().replaceSelectionWith(paragraph.create(), true).scrollIntoView()
view.dispatch(transaction)
return true
}
}
}
})()
How can I do this?
I don't know if this is still relevant but as I was looking for the same thing, I found two ways to make this work.
NOTE:
I'm using tiptap v2, if that's not a problem, then:
I overrode the HardBreak extension, since it's the one that use the Shift-Enter keybinding. It looks something like;
const CustomHardBreak = HardBreak.extend({
addKeyboardShortcuts() {
return {
"Mod-Enter": () => this.editor.commands.setHardBreak(),
"Shift-Enter": () => this.editor.commands.addNewline(),
};
},
});
And used it like so;
editor = new Editor({
extensions: [
customNewline,
CustomHardBreak,
]
});
Use the default editor command createParagraphNear. E.g this.editor.commands.createParagraphNear()
I tried creating a custom extension from your code and ended up with something similar to the command above, i.e;
export const customNewline = Extension.create({
name: "newline",
priority: 1000, // Optional
addCommands() {
return {
addNewline:
() =>
({ state, dispatch }) => {
const { schema, tr } = state;
const paragraph = schema.nodes.paragraph;
const transaction = tr
.deleteSelection()
.replaceSelectionWith(paragraph.create(), true)
.scrollIntoView();
if (dispatch) dispatch(transaction);
return true;
},
};
},
addKeyboardShortcuts() {
return {
"Shift-Enter": () => this.editor.commands.addNewline(),
};
},
});
And added this as an extension in my editor instance.
PS:
They both work, almost exactly the same, I haven't found a difference yet. But there's somewhat of a 'catch' if you would call it that; Both these methods don't work on empty lines/nodes, a character has to be added before the cursor for it to work, any character, even a space.
In TipTap 2.0 I am able to use this custom extension:
const ShiftEnterCreateExtension = Extension.create({
addKeyboardShortcuts() {
return {
"Shift-Enter": ({ editor }) => {
editor.commands.enter();
return true;
},
};
},
});
To make shift + enter behave like enter.
In my case I actually wanted enter to do something different. So I use prosemirror events to set a ref flag on whether shift was pressed. Than I check that flag under the "Enter" keyboard event -- which could be triggered normally or through the shift + enter extension.
relatively new to testing framework, facing below issue where I'm running 'npm run test' on a newly created spec.ts file with no extra test cases added
I'm facing issue that the map function used upon #input element is undefined
spec.ts
beforeEach(() => {
fixture = TestBed.createComponent(InputComponent);
component = fixture.componentInstance;
fixture.detectChanges();
component.ngOnInit();
});
it('should create', () => {
expect(component).toBeTruthy();
});
InputComponent.ts
#Input() set column(colData: Columns[]) {
this.columns = colData;
}
ngOnInit(){
this.colName = this.columns.map(col => col.name);
}
TypeError: Cannot read property 'map' of undefined
You just need to input initial value of the variable and make sure it's array. because map is a property of array.
InputComponent.ts
columns = []; <-- initial value;
#Input() set column(colData: Columns[]) {
this.columns = colData;
}
ngOnInit(){
this.colName = this.columns.map(col => col.name); <-- You haven't declared the initial value of the "this.columns"
}