feat: csv-rows-to-columns

src/pages/tools/csv/csv-rows-to-columns/csv-rows-to-columns.service.test.ts

@@ -0,0 +1,61 @@
+import { describe, it, expect } from 'vitest';
+import { csvRowsToColumns } from './service';
+
+describe('csvRowsToColumns', () => {
+  it('should transpose rows to columns', () => {
+    const input = 'a,b,c\n1,2,3\nx,y,z';
+    const result = csvRowsToColumns(input, false, '', '#');
+    expect(result).toBe('a,1,x\nb,2,y\nc,3,z');
+  });
+
+  it('should fill empty values with custom filler', () => {
+    const input = 'a,b\n1\nx,y,z';
+    const result = csvRowsToColumns(input, false, 'FILL', '#');
+    expect(result).toBe('a,1,x\nb,FILL,y\nFILL,FILL,z');
+  });
+
+  it('should fill empty values with empty strings when emptyValuesFilling is true', () => {
+    const input = 'a,b\n1\nx,y,z';
+    const result = csvRowsToColumns(input, true, 'FILL', '#');
+    expect(result).toBe('a,1,x\nb,,y\n,,z');
+  });
+
+  it('should ignore rows starting with the comment character', () => {
+    const input = '#comment\n1,2,3\nx,y,z';
+    const result = csvRowsToColumns(input, false, '', '#');
+    expect(result).toBe('1,x\n2,y\n3,z');
+  });
+
+  it('should handle an empty input', () => {
+    const input = '';
+    const result = csvRowsToColumns(input, false, '', '#');
+    expect(result).toBe('');
+  });
+
+  it('should handle input with only comments', () => {
+    const input = '#comment\n#another comment';
+    const result = csvRowsToColumns(input, false, '', '#');
+    expect(result).toBe('');
+  });
+
+  it('should handle single row input', () => {
+    const input = 'a,b,c';
+    const result = csvRowsToColumns(input, false, '', '#');
+    expect(result).toBe('a\nb\nc');
+  });
+
+  it('should handle single column input', () => {
+    const input = 'a\nb\nc';
+    const result = csvRowsToColumns(input, false, '', '#');
+    expect(result).toBe('a,b,c');
+  });
+
+  it('should handle this case onlinetools #1', () => {
+    const input =
+      'Variety,Origin\nArabica,Ethiopia\nRobusta,Africa\nLiberica,Philippines\nMocha,\n//green tea';
+    const result = csvRowsToColumns(input, false, '1x', '//');
+    expect(result).toBe(
+      'Variety,Arabica,Robusta,Liberica,Mocha\nOrigin,Ethiopia,Africa,Philippines,1x'
+    );
+  });
+});