Running tests in Go - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the testing package.

Go

import [1]

Drag options to blanks, or click blank then click option'

A"fmt"

B"os"

C"testing"

D"net/http"

Attempts:

3 left

💡 Hint

Common Mistakes

Importing 'fmt' instead of 'testing'.

Forgetting to import any package.

The testing package is imported with "testing" to write test functions.

2fill in blank

medium

Complete the code to define a test function for Go testing.

Go

func TestSum([1] *testing.T) { }

Drag options to blanks, or click blank then click option'

At

Btest

CT

Dctx

Attempts:

3 left

💡 Hint

Common Mistakes

Using uppercase 'T' as parameter name.

Using unrelated parameter names like 'ctx'.

The test function receives a pointer to testing.T, commonly named 't'.

3fill in blank

hard

Fix the error in the test function to fail the test when sum is incorrect.

Go

if sum := 2 + 2; sum != 5 {
    [1].Errorf("Expected 5 but got %d", sum)
}

Drag options to blanks, or click blank then click option'

Afmt

Bt

Clog

Dtesting

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'fmt' or 'log' instead of 't' to report errors.

Using 'testing' package name instead of the parameter.

The test function uses the parameter 't' to report errors with Errorf.

4fill in blank

hard

Fill both blanks to run the test with go test and specify the test file.

Go

go [1] -v [2]

Drag options to blanks, or click blank then click option'

Atest

Brun

Cmain.go

Dsum_test.go

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'run' instead of 'test'.

Specifying a non-test file like 'main.go'.

The command 'go test -v sum_test.go' runs tests verbosely in the specified test file.

5fill in blank

hard

Fill all three blanks to write a table-driven test loop over test cases.

Go

tests := []struct {
    name string
    input int
    want  int
}{
    {"test1", 1, 2},
    {"test2", 2, 4},
}

for _, [1] := range tests {
    t.Run([2].name, func(t *testing.T) {
        got := double([3].input)
        if got != [3].want {
            t.Errorf("got %d, want %d", got, [3].want)
        }
    })
}

Drag options to blanks, or click blank then click option'

Atc

Btest

Dt

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names inconsistently.

Using 't' as loop variable which conflicts with testing.T.

The loop variable is commonly named 'tc' for test case; it is used to access fields in the test run.