tests/cases/compiler/truthinessCallExpressionCoercion.ts(2,9): error TS2774: This condition will always return true since the function is always defined. Did you mean to call it instead?
tests/cases/compiler/truthinessCallExpressionCoercion.ts(18,9): error TS2774: This condition will always return true since the function is always defined. Did you mean to call it instead?
tests/cases/compiler/truthinessCallExpressionCoercion.ts(36,9): error TS2774: This condition will always return true since the function is always defined. Did you mean to call it instead?
tests/cases/compiler/truthinessCallExpressionCoercion.ts(50,9): error TS2774: This condition will always return true since the function is always defined. Did you mean to call it instead?
tests/cases/compiler/truthinessCallExpressionCoercion.ts(66,13): error TS2774: This condition will always return true since the function is always defined. Did you mean to call it instead?


==== tests/cases/compiler/truthinessCallExpressionCoercion.ts (5 errors) ====
    function onlyErrorsWhenTestingNonNullableFunctionType(required: () => boolean, optional?: () => boolean) {
        if (required) { // error
            ~~~~~~~~
!!! error TS2774: This condition will always return true since the function is always defined. Did you mean to call it instead?
        }
    
        if (optional) { // ok
        }
    
        if (!!required) { // ok
        }
    
        if (required()) { // ok
        }
    }
    
    function onlyErrorsWhenUnusedInBody() {
        function test() { return Math.random() > 0.5; }
    
        if (test) { // error
            ~~~~
!!! error TS2774: This condition will always return true since the function is always defined. Did you mean to call it instead?
            console.log('test');
        }
        
        if (test) { // ok
            console.log(test);
        }
    
        if (test) { // ok
            test();
        }
        
        if (test) { // ok
            [() => null].forEach(() => {
                test();
            });
        }
        
        if (test) { // error
            ~~~~
!!! error TS2774: This condition will always return true since the function is always defined. Did you mean to call it instead?
            [() => null].forEach(test => {
                test();
            });
        }
    }
    
    function checksPropertyAccess() {
        const x = {
            foo: {
                bar() { return true; }
            }
        }
    
        if (x.foo.bar) { // error
            ~~~~~~~~~
!!! error TS2774: This condition will always return true since the function is always defined. Did you mean to call it instead?
        }
    
        if (x.foo.bar) { // ok
            x.foo.bar;
        }
    }
    
    class Foo {
        maybeIsUser?: () => boolean;
    
        isUser() {
            return true;
        }
    
        test() {
            if (this.isUser) { // error
                ~~~~~~~~~~~
!!! error TS2774: This condition will always return true since the function is always defined. Did you mean to call it instead?
            }
    
            if (this.maybeIsUser) { // ok
            }
        }
    }
    