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Use Intl.ListFormat

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This commit is contained in:
Bjorn Stromberg 2023-08-09 09:24:01 +08:00
parent fdb697e34c
commit cae2664bca
2 changed files with 10 additions and 19 deletions
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21
source/index.ts
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@ -799,28 +799,13 @@ function unique<T>(values: T[]): T[] {
return Array.from(new Set(values));
}
function joinWithWord(values: string[], word: 'and' | 'or'): string {
switch (values.length) {
case 0:
case 1: {
return values.join('');
}
case 2: {
return values.join(` ${word} `);
}
default: {
// TODO: Replace with .at after node v14 support is dropped
return `${[...values].slice(0, -1).join(', ')}, ${word} ${values[values.length - 1] ?? ''}`;
}
}
}
const andFormatter = new Intl.ListFormat('en', {style: 'long', type: 'conjunction'});
const orFormatter = new Intl.ListFormat('en', {style: 'long', type: 'disjunction'});
function typeErrorMessageMultipleValues(expectedType: AssertionTypeDescription | AssertionTypeDescription[], values: unknown[]): string {
const uniqueExpectedTypes = unique((isArray(expectedType) ? expectedType : [expectedType]).map(value => `\`${value}\``));
const uniqueValueTypes = unique(values.map(value => `\`${is(value)}\``));
return `Expected values which are ${joinWithWord(uniqueExpectedTypes, 'or')}. Received values of type${uniqueValueTypes.length > 1 ? 's' : ''} ${joinWithWord(uniqueValueTypes, 'and')}.`;
return `Expected values which are ${orFormatter.format(uniqueExpectedTypes)}. Received values of type${uniqueValueTypes.length > 1 ? 's' : ''} ${andFormatter.format(uniqueValueTypes)}.`;
}
// Type assertions have to be declared with an explicit type.