From da1a9d4036014860aefadb8181c03de40e0a4a74 Mon Sep 17 00:00:00 2001
From: Mateusz Kwasniewski <kwasniewski.mateusz@gmail.com>
Date: Wed, 6 Dec 2023 09:10:15 +0100
Subject: [PATCH] test: Filter item test (#5557)

---
 .../common/FilterItem/FilterItem.test.tsx     | 113 ++++++++++++++++++
 1 file changed, 113 insertions(+)
 create mode 100644 frontend/src/component/common/FilterItem/FilterItem.test.tsx

diff --git a/frontend/src/component/common/FilterItem/FilterItem.test.tsx b/frontend/src/component/common/FilterItem/FilterItem.test.tsx
new file mode 100644
index 0000000000..e1dc637e5b
--- /dev/null
+++ b/frontend/src/component/common/FilterItem/FilterItem.test.tsx
@@ -0,0 +1,113 @@
+import { screen } from '@testing-library/react';
+import { render } from 'utils/testRenderer';
+import { FilterItem } from './FilterItem';
+
+const getOption = (option: string) =>
+    screen.getByText(option).closest('li')!.querySelector('input')!;
+
+const setup = (initialState: FilterItem) => {
+    const recordedChanges: FilterItem[] = [];
+    const mockProps = {
+        label: 'Test Label',
+        options: [
+            { label: 'Option 1', value: '1' },
+            { label: 'Option 2', value: '2' },
+            { label: 'Option 3', value: '3' },
+        ],
+        onChange: (value: FilterItem) => {
+            recordedChanges.push(value);
+        },
+        state: initialState,
+    };
+
+    render(<FilterItem {...mockProps} />);
+
+    return recordedChanges;
+};
+
+describe('FilterItem Component', () => {
+    it('renders initial state correctly', async () => {
+        const mockState = {
+            operator: 'IS_ANY_OF',
+            values: ['1', '3'],
+        };
+
+        const recordedChanges = setup(mockState);
+
+        const valuesElement = await screen.findByText('1, 3');
+        await screen.findByText('is any of');
+        expect(valuesElement).toBeInTheDocument();
+
+        valuesElement.click();
+        await screen.findByPlaceholderText('Search');
+
+        expect(getOption('Option 1').checked).toBe(true);
+        expect(getOption('Option 2').checked).toBe(false);
+        expect(getOption('Option 3').checked).toBe(true);
+
+        getOption('Option 2').click();
+
+        expect(recordedChanges).toEqual([
+            { operator: 'IS_ANY_OF', values: ['1', '3', '2'] },
+        ]);
+    });
+
+    it('adjusts operator to match singular item', async () => {
+        const mockState = {
+            operator: 'IS_ANY_OF',
+            values: ['1'],
+        };
+
+        const recordedChanges = setup(mockState);
+
+        expect(recordedChanges).toEqual([{ operator: 'IS', values: ['1'] }]);
+    });
+
+    it('adjusts operator to match plural items', async () => {
+        const mockState = {
+            operator: 'IS',
+            values: ['1', '2'],
+        };
+
+        const recordedChanges = setup(mockState);
+
+        expect(recordedChanges).toEqual([
+            { operator: 'IS_ANY_OF', values: ['1', '2'] },
+        ]);
+    });
+
+    it('switches operator', async () => {
+        const mockState = {
+            operator: 'IS_ANY_OF',
+            values: ['1', '3'],
+        };
+
+        const recordedChanges = setup(mockState);
+
+        const operatorsElement = await screen.findByText('is any of');
+
+        operatorsElement.click();
+        const newOperator = await screen.findByText('is not any of');
+
+        newOperator.click();
+
+        expect(recordedChanges).toEqual([
+            { operator: 'IS_NOT_ANY_OF', values: ['1', '3'] },
+        ]);
+    });
+
+    it('deletes all values', async () => {
+        const mockState = {
+            operator: 'IS_ANY_OF',
+            values: ['1', '3'],
+        };
+
+        const recordedChanges = setup(mockState);
+
+        const deleteElement = await screen.findByLabelText('delete');
+
+        deleteElement.click();
+
+        expect(recordedChanges).toEqual([{ operator: 'IS', values: [] }]);
+    });
+});