Default to current year if year input is missing

Closes #145

Author: wojtekmaj

src/DateTimeInput.jsx

@@ -535,8 +535,8 @@ export default class DateTimeInput extends PureComponent {
     } else if (
       formElements.every((formElement) => formElement.value && formElement.validity.valid)
     ) {
-      const year = parseInt(values.year, 10);
-      const monthIndex = parseInt(values.month, 10) - 1 || 0;
+      const year = parseInt(values.year, 10) || new Date().getFullYear();
+      const monthIndex = parseInt(values.month || 1, 10) - 1;
       const day = parseInt(values.day || 1, 10);
       const hour = parseInt(values.hour24 || convert12to24(values.hour12, values.amPm) || 0, 10);
       const minute = parseInt(values.minute || 0, 10);
@@ -545,6 +545,7 @@ export default class DateTimeInput extends PureComponent {
       const proposedValue = new Date();
       proposedValue.setFullYear(year, monthIndex, day);
       proposedValue.setHours(hour, minute, second, 0);
+
       const processedValue = proposedValue;
       onChange(processedValue, false);
     }

src/DateTimeInput.spec.jsx

@@ -745,6 +745,26 @@ describe('DateTimeInput', () => {
     expect(onChange).toHaveBeenCalledWith(nextDate, false);
   });
 
+  it('triggers onChange correctly when changed custom input with no year', () => {
+    const onChange = jest.fn();
+    const date = new Date(2017, 8, 30, 22, 17, 0);
+
+    const component = mount(
+      <DateTimeInput {...defaultProps} format="dd.MM HH:mm" onChange={onChange} value={date} />,
+    );
+
+    const customInputs = component.find('input[type="number"]');
+    const hourInput = customInputs.at(2);
+
+    hourInput.getDOMNode().value = '20';
+    hourInput.simulate('change');
+
+    const currentYear = new Date().getFullYear();
+
+    expect(onChange).toHaveBeenCalled();
+    expect(onChange).toHaveBeenCalledWith(new Date(currentYear, 8, 30, 20, 17, 0), false);
+  });
+
   it('triggers onChange correctly when cleared custom inputs', () => {
     const onChange = jest.fn();
     const date = new Date(2017, 8, 30, 22, 17, 0);