Assertions (XCTAssertEqual, XCTAssertTrue) in Swift - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if two values are equal using XCTAssertEqual.

Swift

XCTAssertEqual([1], 5)

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

Aresult

Bprint

Ctrue

D5

Attempts:

3 left

💡 Hint

Common Mistakes

Using a literal like 5 as the first argument instead of the variable.

Using XCTAssertTrue instead of XCTAssertEqual for value comparison.

Use XCTAssertEqual to compare the variable result with the expected value 5.

2fill in blank

medium

Complete the code to assert that a condition is true using XCTAssertTrue.

Swift

XCTAssertTrue([1])

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Aresult = 10

Bprint(result)

Cfalse

Dresult == 10

Attempts:

3 left

💡 Hint

Common Mistakes

Using assignment (=) instead of comparison (==).

Passing a function call like print() instead of a boolean condition.

XCTAssertTrue expects a condition that evaluates to true. Here, we check if result equals 10.

3fill in blank

hard

Fix the error in the assertion to correctly check if two strings are equal.

Swift

XCTAssertEqual([1], "Hello")

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Agreeting

Bgreeting()

Cprint(greeting)

Dtrue

Attempts:

3 left

💡 Hint

Common Mistakes

Using parentheses after the variable name as if it were a function.

Passing print statements inside XCTAssertEqual.

Pass the variable greeting directly to XCTAssertEqual to compare it with the string "Hello".

4fill in blank

hard

Fill both blanks to assert that the count of items is greater than zero.

Swift

XCTAssertTrue([1] [2] 0)

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Aitems.count

B==

C>

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using equality (==) instead of greater than (>).

Using less than (<) which would check the wrong condition.

We check if items.count is greater than zero using XCTAssertTrue.

5fill in blank

hard

Fill all three blanks to assert that the uppercase version of a string equals "WORLD".

Swift

XCTAssertEqual([1].[2](), "[3]")

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

Aword

Buppercased

CWORLD

Dlowercased

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercased() instead of uppercased().

Comparing to the wrong string value.

We call uppercased() on the variable word and check if it equals "WORLD" using XCTAssertEqual.