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fix(material/datepicker): add ability to have numeric zero value in input #24813

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merged 2 commits into from
May 5, 2022
Merged

fix(material/datepicker): add ability to have numeric zero value in input #24813

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fix(material/datepicker): add ability to have numeric zero value in i…
diprokon Apr 21, 2022
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fix(material/datepicker): add ability to have numeric zero value in i…
diprokon Apr 28, 2022
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5 changes: 2 additions & 3 deletions src/material/datepicker/datepicker-input-base.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -344,9 +344,8 @@ export abstract class MatDatepickerInputBase<S, D = ExtractDateTypeFromSelection

/** Formats a value and sets it on the input element. */
protected _formatValue(value: D | null) {
this._elementRef.nativeElement.value = value
? this._dateAdapter.format(value, this._dateFormats.display.dateInput)
: '';
this._elementRef.nativeElement.value =
value != null ? this._dateAdapter.format(value, this._dateFormats.display.dateInput) : '';
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Wouldn't think also try to format other falsy values like an empty string?

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Yep, it's already there. '!= null' checks only for 'null' and 'undefined'. 0, "", false, etc. will be formatted

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I think @crisbeto is saying that maybe '' should be treated like null. I think it is technically correct to try to parse it though. We don't know what the generic type D will be, but it could be string. If its not string people shouldn't really be passing '' anyways. I think we can keep it like this and try to presubmit it in Google. If we find a lot of people using '' to mean null we may want to change it

}

/** Assigns a value to the model. */
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27 changes: 26 additions & 1 deletion src/material/datepicker/testing/datepicker-input-harness-shared.spec.ts
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
import {HarnessLoader, parallel} from '@angular/cdk/testing';
import {TestbedHarnessEnvironment} from '@angular/cdk/testing/testbed';
import {Component} from '@angular/core';
import {MatNativeDateModule} from '@angular/material/core';
import {DateAdapter, MatNativeDateModule} from '@angular/material/core';
import {ComponentFixture, TestBed} from '@angular/core/testing';
import {FormsModule} from '@angular/forms';
import {MatDatepickerModule} from '@angular/material/datepicker';
Expand Down Expand Up @@ -86,6 +86,31 @@ export function runDatepickerInputHarnessTests(
expect(await input.getValue()).toBe('1/1/2020');
});

it('should set the input value based on date adapter validation and formatting', async () => {
const adapter = fixture.debugElement.injector.get(DateAdapter);
const input = await loader.getHarness(datepickerInputHarness.with({selector: '#basic'}));
const validValues: any[] = [new Date(0), '', 0, false];
const invalidValues: any[] = [null, undefined];
spyOn(adapter, 'format').and.returnValue('FORMATTED_VALUE');
spyOn(adapter, 'isValid').and.callFake(value => validValues.includes(value));
spyOn(adapter, 'deserialize').and.callFake(value =>
validValues.includes(value) ? value : null,
);
spyOn(adapter, 'getValidDateOrNull').and.callFake(value =>
adapter.isValid(value) ? value : null,
);

for (let value of validValues) {
fixture.componentInstance.date = value;
expect(await input.getValue()).toBe('FORMATTED_VALUE');
}

for (let value of invalidValues) {
fixture.componentInstance.date = value;
expect(await input.getValue()).toBe('');
}
});

it('should get the input placeholder', async () => {
const inputs = await loader.getAllHarnesses(datepickerInputHarness);
expect(
Expand Down