Go Land no tests were Run: FMT cannot be used. Printf () & lt; BUG & gt;

Description du problème：

I have a method that I am testing, and everything seems fine. However, when I run the tests in GoLand, I can see in the output that the tests "PASS" but the test runner says "no tests were run".

Here's the sample method in calculator.go

package calculator

import (
    "fmt"
)

type Calculator struct {}

func New() Calculator {
    return Calculator{}
}


func (s *Calculator) AddTwoNumbers(num_one, num_two int) int {
    fmt.Printf("adding")
    return num_one + num_two
}

Here's the test in calculator_test.go:

package calculator

import (
    "fmt"
    "testing"
)

func Test_Calculator_AddTwoNumbers(t *testing.T) {
    // Arrange
    calculator := New()

    // Act
    total := calculator.AddTwoNumbers(1,2)

    // Assert
    if total != 3 {
        msg := fmt.Sprintf("total should have been %d but instead was %d", 3, total)
        t.Error(msg)
    }
}

Résolution de problèmes：

Instead of fmt.Printf() in AddTwoNumbers try either fmt.Println() or fmt.Printf("foo\n')

The absence of the newline in the output of your AddTwoNumbers method is is causing the format of the test execution outputs to not have each test in a new line. The test runner is not being able to interpret that a test was run. Adding that newline, keeps a clean output.

https://stackoverflow.com/questions/68607771/goland-no-tests-were-run