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Description

The strict-boolean-expressions does not prevent the following bug:

const numbers: number[] = [];
const filteredNumbers = numbers.filter((element) => {
  return element; // BUG - SHOULD BE SOME KIND OF BOOLEAN COMPARISON!!!
});

This is because it does not examine function return values, it only examines comparisons.

Note that the no-unnecessary-condition rule is a similar rule, and it does support function return values. Thus, the function-examining logic needs to also be copy-pasted to this rule, so that this rule can catch the bug above.

For reference, the rule should be able to handle the following Array methods:

• Array.every
• Array.filter
• Array.find
• Array.findIndex
• Array.findLast
• Array.findLastIndex
• Array.some