CRUD operation verification in Testing Fundamentals - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does CRUD stand for in software testing?

CRUD stands for Create, Read, Update, and Delete. These are the four basic operations to manage data in applications.

beginner

Why is verifying the 'Create' operation important in CRUD testing?

Verifying 'Create' ensures that new data can be added correctly and saved in the system without errors.

beginner

How do you verify the 'Read' operation in CRUD testing?

You check if the system can retrieve and display the correct data that was previously created or stored.

beginner

What is a common way to test the 'Update' operation?

Update testing involves changing existing data and verifying that the changes are saved and reflected correctly.

beginner

How do you confirm the 'Delete' operation works properly?

You delete data and then check that it no longer exists or appears in the system.

Which CRUD operation is responsible for adding new data?

A Create

B Read

C Update

D Delete

Create operation adds new data to the system.

What should you verify after performing an Update operation?

A Data is deleted

B Data remains unchanged

C New data is created

D Data is changed and saved correctly

Update means changing existing data and saving those changes.

After deleting data, what is the expected result?

A Data is still visible

B Data is updated

C Data is removed and not visible

D Data is duplicated

Delete operation removes data so it should no longer be visible.

Which CRUD operation involves retrieving data?

A Create

B Read

C Update

D Delete

Read operation fetches and shows existing data.

Why is CRUD testing important?

A To ensure data operations work correctly

B To verify hardware compatibility

C To test network speed

D To check user interface colors

CRUD testing ensures that data can be created, read, updated, and deleted correctly.

Explain the four CRUD operations and how you would verify each in a simple application.

Think about adding, viewing, changing, and removing data.

Describe a real-life example where CRUD operation verification is essential and why.

Imagine using an app to save and update your contacts.

Practice

1. Which CRUD operation is responsible for adding new data to a system?

easy

A. Delete

B. Read

C. Update

D. Create

Solution

1. Step 1: Understand CRUD operations

   CRUD stands for Create, Read, Update, and Delete, each representing a basic data operation.

2. Step 2: Identify the operation for adding data

   The 'Create' operation is used to add new data entries into the system.

3. Final Answer:

   Create -> Option D

4. Quick Check:

   Adding new data = Create [OK]

Hint: Create means add new data to the system [OK]

Common Mistakes:

• Confusing 'Create' with 'Update'
• Thinking 'Read' adds data
• Mixing 'Delete' with adding data

2. Which of the following is the correct syntax to verify a Delete operation in a test case?

easy

A. assert data.exists() == True

B. assert data.is_deleted() == True

C. assert data.count() > 0

D. assert data.is_present() == True

Solution

1. Step 1: Understand Delete verification

   To verify deletion, the test must confirm the data no longer exists or is marked deleted.

2. Step 2: Choose assertion that confirms deletion

   assert data.is_deleted() == True correctly checks that the data was deleted.

3. Final Answer:

   assert data.is_deleted() == True -> Option B

4. Quick Check:

   Delete check uses is_deleted() == True [OK]

Hint: Check deletion with is_deleted() == True [OK]

Common Mistakes:

• Using exists() == True after deletion
• Checking count() > 0 which means data exists
• Confusing is_present() with deletion status

3. Consider this test code snippet verifying an Update operation:

original_value = record.get('name')
record.update({'name': 'Alice'})
updated_value = record.get('name')
assert updated_value == 'Alice'

What will be the result of this test if the update works correctly?

medium

A. Test passes because updated_value matches 'Alice'

B. Test fails because original_value is not checked

C. Test fails due to syntax error in update method

D. Test passes but updated_value remains original_value

Solution

1. Step 1: Analyze the update operation

   The code updates the 'name' field to 'Alice' and retrieves it again.

2. Step 2: Check the assertion logic

   The assertion checks if updated_value equals 'Alice', which should be true if update works.

3. Final Answer:

   Test passes because updated_value matches 'Alice' -> Option A

4. Quick Check:

   Updated value == 'Alice' means test passes [OK]

Hint: Assert updated value equals new data after update [OK]

Common Mistakes:

• Assuming original_value must be checked in this test
• Thinking update method has syntax error
• Believing updated_value stays unchanged after update

4. A tester wrote this code to verify a Create operation:

new_record = db.create({'id': 1, 'value': 100})
assert new_record.id == 1
assert new_record.value == 100
assert db.find(1) == None

What is the error in this test?

medium

A. The assertion db.find(1) == None is incorrect after creation

B. The new_record object does not have id attribute

C. The create method should not return a record

D. The value 100 is not valid for creation

Solution

1. Step 1: Understand Create operation verification

   After creating a record, it should be found in the database.

2. Step 2: Analyze the assertion db.find(1) == None

   This assertion expects no record found, which contradicts the creation.

3. Final Answer:

   The assertion db.find(1) == None is incorrect after creation -> Option A

4. Quick Check:

   Created record must be found, so find(1) != None [OK]

Hint: After create, find should return the record, not None [OK]

Common Mistakes:

• Expecting find to return None after creation
• Assuming create returns nothing
• Confusing attribute existence on new_record

5. You want to verify all CRUD operations on a user profile. Which sequence of test steps is best to ensure data integrity?

hard

A. Create user, Update user, Delete user, Read user

B. Read user, Create user, Update user, Delete user

C. Create user, Read user, Update user, Delete user

D. Delete user, Create user, Read user, Update user

Solution

1. Step 1: Understand logical CRUD test order

   First, create data to have something to work with, then read to verify creation.

2. Step 2: Follow with update and delete

   Update tests changes, and delete confirms removal, maintaining data integrity.

3. Final Answer:

   Create user, Read user, Update user, Delete user -> Option C

4. Quick Check:

   CRUD order: Create, Read, Update, Delete [OK]

Hint: Test CRUD in order: Create, Read, Update, Delete [OK]

Common Mistakes:

• Deleting before creating data
• Reading before data exists
• Updating before creation