DAX Unit Testing Suite for Sales Order Header

Unit Tests in DAX for Given Code Snippet

Test Case 1: Test for Correct Columns in the Result

• Implement a test to verify that the result contains columns for AccountNumber and CreditCardApprovalCode.
• Assert that the result table has columns SalesOrderHeader[AccountNumber] and SalesOrderHeader[CreditCardApprovalCode].

EVALUATE
SUMMARIZECOLUMNS (
    SalesOrderHeader[AccountNumber], 
    "CreditCardApprovalCode", "APPROVED"
)

Test Case 2: Test for Correct Filtering

• Create a test to check if only entries with CreditCardApprovalCode as "APPROVED" are included in the result.
• Assert that all rows in the result have CreditCardApprovalCode as "APPROVED".

EVALUATE
SUMMARIZECOLUMNS (
    SalesOrderHeader[AccountNumber],
    FILTER (
        VALUES ( SalesOrderHeader[CreditCardApprovalCode] ),
        SalesOrderHeader[CreditCardApprovalCode] = "APPROVED"
    )
)

Test Case 3: Test Empty Result Scenario

• Test the scenario when there are no entries with CreditCardApprovalCode as "APPROVED".
• Assert that the result table is empty.

EVALUATE
SUMMARIZECOLUMNS (
    SalesOrderHeader[AccountNumber],
    FILTER (
        VALUES ( SalesOrderHeader[CreditCardApprovalCode] ),
        SalesOrderHeader[CreditCardApprovalCode] = "DECLINED"
    )
)

Test Case 4: Test for Boundary Condition

• Implement a test with a very large dataset to check performance.
• Assert that the query execution time is within acceptable limits for a large dataset.

-- Code snippet to create a large dataset for testing performance
DEFINE 
    VAR LargeDataset = GENERATESERIES(1, 1000000)
EVALUATE
SUMMARIZECOLUMNS(
    LargeDataset,
    FILTER (
        VALUES ( SalesOrderHeader[CreditCardApprovalCode] ),
        SalesOrderHeader[CreditCardApprovalCode] = "APPROVED"
    )
)

By utilizing these unit tests with clear assertions, the provided code snippet's functionality, performance, and accuracy can be thoroughly validated in various scenarios, ensuring reliability and robustness.