From a5b2293ea81e5bda8bb9d6ecb431c3bfc27b47b6 Mon Sep 17 00:00:00 2001
From: Aaro Koivukangas <aaro@koivukangas.cc>
Date: Thu, 20 Aug 2026 09:32:21 +0300
Subject: [PATCH] [UnitTests] Add startYearAtUniFilter tests

---
 .../tests/unit/filters/startYearAtUni.test.ts | 34 +++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 services/frontend/tests/unit/filters/startYearAtUni.test.ts

diff --git a/services/frontend/tests/unit/filters/startYearAtUni.test.ts b/services/frontend/tests/unit/filters/startYearAtUni.test.ts
new file mode 100644
index 000000000..6918134a6
--- /dev/null
+++ b/services/frontend/tests/unit/filters/startYearAtUni.test.ts
@@ -0,0 +1,34 @@
+import { assert, describe, it } from 'vitest'
+
+import { startYearAtUniFilter } from '@/components/FilterView/filters/startYearAtUni'
+import { FormattedStudent } from '@oodikone/shared/types/studentData'
+
+import { createStudent } from './helpers'
+
+const filterStudent = (student: FormattedStudent, selected: number | string) =>
+  startYearAtUniFilter().filter(student, { args: undefined, options: { selected }, precomputed: undefined })
+
+void describe('startYearAtUniFilter', () => {
+  void it("should return true when selected year matches the student's starting year (FALL)", () => {
+    const student = createStudent({ started: new Date('2020-08-01') })
+
+    assert.strictEqual(filterStudent(student, 2020), true)
+  })
+
+  void it("should return true when selected year matches the student's starting year (SPRING)", () => {
+    const student = createStudent({ started: new Date('2020-03-01') })
+
+    assert.strictEqual(filterStudent(student, 2020), true)
+  })
+
+  void it("should return false when selected year doesn't match the student's starting year", () => {
+    const student = createStudent({ started: new Date('2020-08-01') })
+
+    assert.strictEqual(filterStudent(student, 2021), false)
+  })
+
+  void it('isActive should match the filter state', () => {
+    assert.strictEqual(startYearAtUniFilter().isActive({ selected: '' }, undefined), false)
+    assert.strictEqual(startYearAtUniFilter().isActive({ selected: 2020 }, undefined), true)
+  })
+})