How to use custom helper functions in Golang unit tests?

How to use custom helper functions in Golang unit tests? You can easily reuse code and improve readability by encapsulating specific functionality in helper functions. Steps: Create a helper function (package scope) Introduce a helper function (test file) Use a helper function (test function)

How to use customization in Golang unit testing Auxiliary function?

Using custom helper functions in Golang unit tests can significantly improve the organization, readability and maintainability of the code. By encapsulating specific functionality in helper functions, we can easily reuse code and avoid repeating the same logic in multiple tests.

Steps:

1. Create auxiliary function:

   In _test.go file (that is, the sibling file containing the unit test), create a set of custom helper functions.

2. Declaration of package scope:

   Make sure the declaration of the helper function is package scope so that it can be used in the test file.

3. Introducing auxiliary functions:

   In the test file, use the import statement to introduce the package containing the auxiliary functions.

4. Using helper functions:

   In the test function, call the helper function by its name.

Practical case:

Suppose we have a package named utils, which contains a helper functionEqualSlices, which compares two slices for equality.

Helper function:

package utils

func EqualSlices(a, b []int) bool {
    if len(a) != len(b) {
        return false
    }
    for i, v := range a {
        if v != b[i] {
            return false
        }
    }
    return true
}

Test file:

package my_package_test

import (
    "testing"
    "my_package/utils"
)

func TestFunction(t *testing.T) {
    // 使用辅助函数
    if !utils.EqualSlices([]int{1, 2, 3}, []int{1, 2, 3}) {
        t.Errorf("切片不相等")
    }
}

By using a custom helper function, we are able to compare concisely Slices without having to duplicate logic in your test code. This makes test code easier to read and maintain.

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