Table of Contents

• Declaration
  • Gradle
  • Maven
• Usage
  • Comparison
  • Result
  • Visitor
  • Output
  • Allure Report

Declaration

Gradle

Add dependency to build.gradle.

implementation("com.github.ngoanh2n:csv-comparator:1.10.0")

Maven

Add dependency to pom.xml.

<dependency>
  <groupId>com.github.ngoanh2n</groupId>
  <artifactId>csv-comparator</artifactId>
  <version>1.10.0</version>
</dependency>

Usage

Comparison

Example: CSV is formatted columns [id,email,firstname,lastname,age,note].

1. Compare 2 CSV files

   File expectedCsvFile = new File("data/expected/file.csv");
   File actualCsvFile = new File("data/actual/file.csv");
   
   CsvComparisonOptions options = CsvComparisonOptions
           .builder()
           .selectColumns("email", "firstname", "lastname")
           .selectColumnId("email")
           //.selectColumns(1, 2, 3)
           //.selectColumnId(1)
           .build();
   CsvComparisonResult result = CsvComparator.compare(expectedCsvFile, actualCsvFile, options);

2. Compare 2 CSV directories

   Path expectedCsvDir = Paths.get("data/expected");
   Path actualCsvDir = Paths.get("data/actual");
   
   CsvComparisonOptions options = CsvComparisonOptions
           .builder()
           .selectColumns("email", "firstname", "lastname")
           .selectColumnId("email")
           //.selectColumns(1, 2, 3)
           //.selectColumnId(1)
           .build();
   CsvBulkComparisonResult result = CsvComparator.compare(expectedCsvDir, actualCsvDir, options);

Result

CsvComparisonResult is the result of CsvComparator.compare(expectedCsvFile, actualCsvFile, options).

boolean hasDiff = CsvComparisonResult.hasDiff();
boolean hasDeletion = CsvComparisonResult.hasDeletion();
boolean hasInsertion = CsvComparisonResult.hasInsertion();
boolean hasModification = CsvComparisonResult.hasModification();
List<String[]> keptRows = CsvComparisonResult.getKeptRows();
List<String[]> deletedRows = CsvComparisonResult.getDeletedRows();
List<String[]> insertedRows = CsvComparisonResult.getInsertedRows();
List<String[]> modifiedRows = CsvComparisonResult.getModifiedRows();

CsvBulkComparisonResult is the result of CsvComparator.compare(expectedCsvDir, actualCsvDir, options).

boolean hasDiff = CsvBulkComparisonResult.hasDiff();
int diffTotal = CsvBulkComparisonResult.getDiffTotal();
List<CsvComparisonResult> diffResults = CsvBulkComparisonResult.getDiffResults();

Visitor

CsvComparisonVisitor for walking through CsvComparator.

• CsvComparisonVisitor#comparisonStarted(CsvComparisonOptions, File, File)
• CsvComparisonVisitor#rowKept(CsvComparisonOptions, String[], String[])
• CsvComparisonVisitor#rowDeleted(CsvComparisonOptions, String[], String[])
• CsvComparisonVisitor#rowInserted(CsvComparisonOptions, String[], String[])
• CsvComparisonVisitor#rowModified(CsvComparisonOptions, String[], String[], List)
• CsvComparisonVisitor#comparisonFinished(CsvComparisonOptions, File, File, CsvComparisonResult)

Output

CsvComparisonOutput for writing comparison output files to specified location.
An implementation of CsvComparisonVisitor.

• The output is always created at build/ngoanh2n/csv/{yyyyMMdd.HHmmss.SSS} by default
• Use CsvComparisonResultOptions to adjust the output behaviors. And set to CsvComparisonOptions

  CsvComparisonResultOptions resultOptions = CsvComparisonResultOptions
         .builder()
         .writeOutputs(false)                       // Default to true
         //.location(Paths.get("build/custom"))     // Default to build/ngoanh2n/csv
         .build();
  CsvComparisonOptions options = CsvComparisonOptions
          .builder()
          .resultOptions(resultOptions)             // Default to CsvComparisonResultOptions.defaults()
          .build();

Allure Report

When using Allure as a report framework, should use com.github.ngoanh2n:csv-comparator-allure.
csv-comparator-allure README.