Minitest basics (assert style) in Ruby - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to assert that the value of x is true.

Ruby

assert [1]

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Atrue

Bnil

Cfalse

Dx

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'true' instead of the variable name.

Using 'false' or 'nil' which will fail the assertion.

The assert method checks if the given expression is true. Here, x should be true for the test to pass.

2fill in blank

medium

Complete the code to assert that two values are equal.

Ruby

assert_equal([1], result)

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A5

Bresult

C10

Dnil

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping expected and actual values.

Using a wrong expected value.

The assert_equal method checks if the first argument equals the second. Here, we expect result to be 5.

3fill in blank

hard

Fix the error in the assertion to check if the array includes the number 3.

Ruby

assert [1].include?(3)

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Ainclude

B3

Carray

Dassert

Attempts:

3 left

💡 Hint

Common Mistakes

Using the number 3 directly instead of calling include? on the array.

Using 'include' without calling it on the array.

The assert method needs a condition. Here, we check if array.include?(3) is true.

4fill in blank

hard

Fill both blanks to assert that the string 'hello' starts with 'he'.

Ruby

assert [1].start_with?([2])

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Agreeting

B'he'

C'hi'

Dmessage

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong variable name.

Using the wrong substring to check.

The assert checks if greeting.start_with?('he') is true.

5fill in blank

hard

Fill all three blanks to assert that the hash has a key :name and its value is 'Alice'.

Ruby

assert [1].key?([2]) && [3][:name] == 'Alice'

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Aperson

B:name

Ddata

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names inconsistently.

Using a string instead of a symbol for the key.

This assertion checks two things: the hash person has the key :name, and the value for that key is 'Alice'.