File upload (cy.selectFile) in Cypress - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to select a file for upload using Cypress.

Cypress

cy.get('input[type="file"]').[1]('example.json')

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

AattachFile

Bclick

Ctype

DselectFile

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'click' instead of 'selectFile' to upload files.

Trying to use 'type' to input file paths.

The selectFile command is used in Cypress to simulate selecting a file for upload.

2fill in blank

medium

Complete the code to select a file with a specific file path.

Cypress

cy.get('input[type="file"]').selectFile([1]: 'cypress/fixtures/sample.png'})

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

AfilePath

Bcontents

Cpath

Dfile

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'contents' instead of 'filePath' to specify the file location.

Using 'path' which is not a valid option here.

The filePath option specifies the path of the file to select in selectFile.

3fill in blank

hard

Fix the error in the code to correctly select multiple files.

Cypress

cy.get('input[type="file"]').selectFile([[1]])

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

A['file1.png', 'file2.png']

B'file1.png', 'file2.png'

C'file1.png'

Dfile1.png, file2.png

Attempts:

3 left

💡 Hint

Common Mistakes

Passing multiple file names as a single string separated by commas.

Not using an array to select multiple files.

To select multiple files, pass an array of file paths inside selectFile.

4fill in blank

hard

Fill both blanks to select a file and assert the file name is correct.

Cypress

cy.get('input[type="file"]').selectFile([1]).should('have.prop', [2])

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

A{ filePath: 'test.pdf' }

B'files'

C'files[0].name'

D'fileName'

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect property names in the assertion.

Not passing the file path as an object.

Use { filePath: 'test.pdf' } to select the file and assert the first file's name with 'files[0].name'.

5fill in blank

hard

Fill all three blanks to select a file with contents and verify its size.

Cypress

cy.get('input[type="file"]').selectFile([1]).then(fileInput => {
  expect(fileInput[0].files[0].[2]).to.equal([3])
})

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

A{ contents: 'Hello World', fileName: 'hello.txt' }

Bsize

C11

Dlength

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'length' instead of 'size' for file size.

Not providing both contents and fileName in the file object.

Use { contents: 'Hello World', fileName: 'hello.txt' } to create a file with contents, check the size property, and expect it to equal 11 bytes.

Practice

1. What is the primary purpose of cy.selectFile in Cypress testing?

easy

A. To simulate a user selecting a file for upload in a test

B. To download files from the server during a test

C. To delete files from the local system during a test

D. To open a file in the browser for viewing

Solution

1. Step 1: Understand the role of cy.selectFile

   This command is designed to simulate a user action of selecting a file in a file input element during automated tests.

2. Step 2: Compare options with this purpose

   Options B, C, and D describe actions unrelated to file selection for upload, such as downloading, deleting, or opening files, which cy.selectFile does not do.

3. Final Answer:

   To simulate a user selecting a file for upload in a test -> Option A

4. Quick Check:

   File selection = Simulate user upload [OK]

Hint: Remember: selectFile mimics user file selection [OK]

Common Mistakes:

• Confusing file upload with file download
• Thinking selectFile deletes files
• Assuming selectFile opens files in browser

2. Which of the following is the correct syntax to select a file named example.txt using cy.selectFile?

easy

A. cy.get('input[type=file]').selectFile('example.txt')

B. cy.get('input[type=file]').selectFile({ contents: 'example.txt' })

C. cy.get('input[type=file]').selectFile('file://example.txt')

D. cy.get('input[type=file]').selectFile('cypress/fixtures/example.txt')

Solution

1. Step 1: Understand file path usage in cy.selectFile

   The file path should point to the test fixture location, usually inside the cypress/fixtures folder.

2. Step 2: Evaluate each option's path

   cy.get('input[type=file]').selectFile('cypress/fixtures/example.txt') correctly uses the relative path to the fixture file. cy.get('input[type=file]').selectFile('example.txt') uses just the filename without path, which won't work. cy.get('input[type=file]').selectFile({ contents: 'example.txt' }) incorrectly uses an object with contents as string. cy.get('input[type=file]').selectFile('file://example.txt') uses an invalid file URI.

3. Final Answer:

   cy.get('input[type=file]').selectFile('cypress/fixtures/example.txt') -> Option D

4. Quick Check:

   Use fixture path for selectFile [OK]

Hint: Use fixture folder path for files in selectFile [OK]

Common Mistakes:

• Using only filename without path
• Passing file contents as string instead of path
• Using invalid file URI scheme

3. Given the following Cypress code snippet, what will be the result of the test?

cy.get('input[type=file]').selectFile('cypress/fixtures/photo.png')
  .should('have.prop', 'files').then(files => {
    expect(files[0].name).to.equal('photo.png')
  })

medium

A. The test will pass because the file name matches

B. The test will fail because the file input does not have files property

C. The test will throw a syntax error due to incorrect chaining

D. The test will pass but the file name will be undefined

Solution

1. Step 1: Understand selectFile and file input properties

   After selecting a file, the input element's files property contains the selected files. Accessing files[0].name should give the file name.

2. Step 2: Analyze the assertion

   The assertion checks if the first file's name equals 'photo.png', which matches the selected file. This is valid and should pass.

3. Final Answer:

   The test will pass because the file name matches -> Option A

4. Quick Check:

   File name check = Pass [OK]

Hint: Files property holds selected files; check name to verify [OK]

Common Mistakes:

• Assuming files property is missing
• Confusing syntax chaining in Cypress
• Expecting undefined file name

4. You wrote this Cypress test to upload a file but it fails:

cy.get('#fileInput').selectFile('example.pdf')

What is the most likely reason for the failure?

medium

A. The selector '#fileInput' is invalid syntax

B. The file path is incorrect or missing the fixture folder

C. selectFile cannot be used on input elements

D. The file must be uploaded manually, not via tests

Solution

1. Step 1: Check file path requirements for selectFile

   The file path must be relative to the cypress/fixtures folder or an absolute path. Just 'example.pdf' without path likely causes failure.

2. Step 2: Verify other options

   Selector syntax '#fileInput' is valid. selectFile works on input elements. Manual upload is not required in tests.

3. Final Answer:

   The file path is incorrect or missing the fixture folder -> Option B

4. Quick Check:

   File path must include fixture folder [OK]

Hint: Always include fixture folder in file path [OK]

Common Mistakes:

• Using filename without path
• Thinking selector syntax is wrong
• Believing selectFile can't upload files

5. You want to test uploading multiple files at once using cy.selectFile. Which code snippet correctly uploads two files named doc1.pdf and image1.png located in the fixtures folder?

hard

A. cy.get('input[type=file]').selectFile({ files: ['doc1.pdf', 'image1.png'] })

B. cy.get('input[type=file]').selectFile('cypress/fixtures/doc1.pdf, cypress/fixtures/image1.png')

C. cy.get('input[type=file]').selectFile(['cypress/fixtures/doc1.pdf', 'cypress/fixtures/image1.png'])

D. cy.get('input[type=file]').selectFile(['doc1.pdf', 'image1.png'])

Solution

1. Step 1: Understand multiple file upload syntax

   cy.selectFile accepts an array of file paths to upload multiple files. Each path must be relative to the fixtures folder or absolute.

2. Step 2: Evaluate each option

   cy.get('input[type=file]').selectFile(['cypress/fixtures/doc1.pdf', 'cypress/fixtures/image1.png']) correctly provides an array with full fixture paths. cy.get('input[type=file]').selectFile('cypress/fixtures/doc1.pdf, cypress/fixtures/image1.png') uses a single string with comma-separated paths, which is invalid. cy.get('input[type=file]').selectFile({ files: ['doc1.pdf', 'image1.png'] }) uses an object with files array but missing paths. cy.get('input[type=file]').selectFile(['doc1.pdf', 'image1.png']) uses array without fixture folder path, which will fail.

3. Final Answer:

   cy.get('input[type=file]').selectFile(['cypress/fixtures/doc1.pdf', 'cypress/fixtures/image1.png']) -> Option C

4. Quick Check:

   Array of fixture paths = Correct multiple upload [OK]

Hint: Use array of full fixture paths for multiple files [OK]

Common Mistakes:

• Passing comma-separated string instead of array
• Omitting fixture folder in paths
• Using object without correct file paths