[Tests] Test course tab export

services/frontend/tests/unit/coursesTabExport.test.ts

@@ -0,0 +1,70 @@
+import { assert, describe, it } from 'vitest'
+
+import {
+  getGroupIdToExportKey,
+  renameKeys,
+} from '@/components/PopulationComponents/Students/Table/CoursesTab/excelExport'
+
+const createModules = (modules: Record<string, [code: string, groupId: string][]>) =>
+  new Map(
+    Object.entries(modules).map(([parentCode, courses]) => [
+      parentCode,
+      { courses: courses.map(([code, groupId]) => ({ code, groupId })) },
+    ])
+  )
+
+void describe('getGroupIdToExportKey', () => {
+  void it('maps each course groupId to its course code', () => {
+    const modules = createModules({
+      MOD1: [
+        ['TKT10001', 'otm-1'],
+        ['TKT10002', 'otm-2'],
+      ],
+      MOD2: [['MAT11001', 'otm-3']],
+    })
+
+    assert.deepEqual(getGroupIdToExportKey(modules), {
+      'otm-1': 'TKT10001',
+      'otm-2': 'TKT10002',
+      'otm-3': 'MAT11001',
+    })
+  })
+
+  void it('uses the first code when the same groupId appears under several modules', () => {
+    const modules = createModules({
+      MOD1: [['TKT10001', 'otm-1']],
+      MOD2: [['TKT10001-OLD', 'otm-1']],
+    })
+
+    assert.deepEqual(getGroupIdToExportKey(modules), { 'otm-1': 'TKT10001' })
+  })
+
+  void it('keeps keys unique when separate groupIds share a code', () => {
+    const modules = createModules({
+      MOD1: [['TKT10001', 'otm-1']],
+      MOD2: [['TKT10001', 'otm-2']],
+    })
+
+    assert.deepEqual(getGroupIdToExportKey(modules), {
+      'otm-1': 'TKT10001',
+      'otm-2': 'TKT10001 (otm-2)',
+    })
+  })
+
+  void it('returns an empty map when there are no modules', () => {
+    assert.deepEqual(getGroupIdToExportKey(new Map()), {})
+  })
+})
+
+void describe('renameKeys', () => {
+  void it('renames mapped keys and keeps other keys and all values unchanged', () => {
+    const course = { grade: '5', exportValue: '5' }
+    const row = { studentNumber: '123456789', totalPassed: 1, 'otm-1': course }
+
+    assert.deepEqual(renameKeys(row, { 'otm-1': 'TKT10001' }), {
+      studentNumber: '123456789',
+      totalPassed: 1,
+      TKT10001: course,
+    })
+  })
+})