Test-driven basics in Go - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a test function in Go.

Go

func TestSum[1](t *testing.T) {
    // test code here
}

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

A[]

B{}

C<>

D()

Attempts:

3 left

💡 Hint

Common Mistakes

Using curly braces {} instead of parentheses () after the function name.

Omitting the parentheses completely.

In Go, test functions must have the form func TestXxx(t *testing.T) with parentheses after the function name.

2fill in blank

medium

Complete the code to import the testing package in Go.

Go

[1] "testing"

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

A""

Bpackage

Cimport

D_

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'package', which declares the current package name.

Using '_' for blank imports, which prevents using 'testing.T'.

The standard way to import the testing package is 'import "testing"' so that you can use types like testing.T in your tests.

3fill in blank

hard

Fix the error in the test assertion to fail the test if sum is not 5.

Go

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

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

A5

B6

C0

Dsum

Attempts:

3 left

💡 Hint

Common Mistakes

Comparing sum to the wrong number.

Using sum instead of a number in the condition.

The test should check if sum is not equal to 5 to detect failure correctly.

4fill in blank

hard

Fill both blanks to create a simple test that checks if Add(2, 3) equals 5.

Go

func TestAdd[1](t *testing.T) {
    result := Add(2, 3)
    if result != [2] {
        t.Errorf("Expected 5 but got %d", result)
    }
}

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

A()

B5

C6

D{}

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting parentheses after the function name.

Using the wrong expected value in the if condition.

Test functions need parentheses after their name, and the expected result is 5.

5fill in blank

hard

Fill all three blanks to write a test that fails if Multiply(2, 3) is not 6.

Go

func TestMultiply[1](t *testing.T) {
    got := Multiply(2, 3)
    want := [2]
    if got != [3] {
        t.Errorf("Expected %d but got %d", want, got)
    }
}

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

A()

B6

Cwant

D5

Attempts:

3 left

💡 Hint

Common Mistakes

Using a wrong expected value.

Comparing got to a literal instead of want.

Test function needs parentheses, expected value is 6, and the if condition compares got to want.