Regression testing strategy in Golang function testing

What is regression testing? Perform testing of existing software functionality to detect the impact of code changes on existing functionality. Types of regression testing strategies: Risk-based strategy Coverage-based strategy Timeline-based strategy Hybrid strategy (combine the above strategies) Regression testing in action in Golang: Implementing a regression testing strategy using a list of test cases and the output of a unit test function test function: Identify high-risk areas Create test cases targeting these areas Automatically run tests Set code coverage thresholds

Regression testing strategy in Golang function testing

Regression testing is an essential type of testing in software development, which ensures that existing functionality still works properly after code changes. When writing tests for Go functions, a regression testing strategy is crucial to prevent the introduction of new bugs.

What is regression testing?

Regression testing is a set of tests that are repeatedly run against existing functions in the software. Its purpose is to detect the impact of code changes on existing functionality, such as fixing bugs, adding new features, or refactoring code.

Types of regression testing strategies

The following are common regression testing strategies:

• Risk-based strategies: Prioritize testing of high-risk areas that are most likely to be affected by code changes.
• Coverage-based strategy: Focus on test cases that cover all or most of the code paths.
• Schedule-based strategy: Run all test cases regularly, regardless of code changes.
• Hybrid strategy: Combine a combination of the above strategies to achieve optimal coverage and efficiency.

Regression testing practice in Golang

We use Go language to create a simple function to demonstrate regression testing:

package main

import (
    "testing"
)

func Sum(a, b int) int {
    return a + b
}

func TestSum(t *testing.T) {
    tests := []struct {
        a, b, expected int
    }{
        {1, 2, 3},
        {3, 4, 7},
        {-1, -2, -3},
    }

    for _, test := range tests {
        actual := Sum(test.a, test.b)
        if actual != test.expected {
            t.Errorf("Sum(%d, %d) = %d, expected %d", test.a, test.b, actual, test.expected)
        }
    }
}

We create A unit test function TestSum, which contains a list of test cases. Each test case contains input values ​​and expected results. During testing, we iterate through the test cases and test whether the output of the Sum function matches the expected result.

Implementing a regression testing strategy

In order to implement a regression testing strategy, we need to:

• Identify high-risk areas or code paths.
• Create test cases targeting these areas.
• Automatically run tests after code changes.
• Set code coverage thresholds to monitor the effectiveness of regression testing.

By following these steps, we can build a robust regression testing strategy to ensure that Go functions still work properly after changes are made.

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