What are the common testing and debugging techniques in Golang framework?

Testing and Debugging Tips: Testing Tips: Unit Testing: To test a single function, use the testing package. Integration testing: simulate client requests, test overall functionality, use httptest package. End-to-end testing: simulate user interactions, using WebDriver or real clients. Debugging Tips: debugger keyword: Add in the line of code to enter the debugger. log package: Prints diagnostic messages to view program status while running.

Testing and Debugging Tips in Golang Framework

Testing Tips:

• Unit testing: To test a single function or component, use the testing package.

  import "testing"
  
  func TestAdd(t *testing.T) {
    if Add(2, 3) != 5 {
        t.Error("Add(2, 3) should return 5")
    }
  }

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• Integration testing: Simulate client requests and test the overall functionality of the application, using the net/http/httptest package.

  import (
    "net/http"
    "net/http/httptest"
    "testing"
  )
  
  func TestIndexHandler(t *testing.T) {
    req, err := http.NewRequest("GET", "/", nil)
    if err != nil {
        t.Fatal(err)
    }
    rr := httptest.NewRecorder()
    IndexHandler(rr, req)
  
    if rr.Code != http.StatusOK {
        t.Errorf("IndexHandler returned wrong status code: got %v want %v", rr.Code, http.StatusOK)
    }
  }

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• End-to-end testing: Use a real client or WebDriver to drive the entire application, simulating user interaction.

Debugging skills:

• Use debugger Keywords: When debugging is required Add this keyword to the line of code to enter the debugger.

  package main
  
  import (
    "fmt"
  )
  
  func main() {
    debugger
    fmt.Println("This line will never be executed")
  }

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• Use the log package: Print diagnostic messages to view program status while running.

  import (
    "log"
  )
  
  func main() {
    log.Println("Starting the application...")
  }

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Practical case:

Consider a web application using the Gin framework.

Test case:

• Write a unit test to test the Add function.
• Write an integration test to simulate a GET request to the /index route and verify the response code.

Debugging tips:

• Add the debugger keyword to the main function to Enter the debugger on startup.
• Add the log statement in the IndexHandler function to print diagnostic messages.

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