tests: add SessionStorage unit tests

Author: alessiofrittoli

__tests__/storage/session.test.ts

@@ -0,0 +1,85 @@
+/**
+ * @jest-environment jsdom
+ */
+import { SessionStorage } from '@/storage/SessionStorage'
+
+describe( 'SessionStorage', () => {
+
+	beforeEach( () => {
+		sessionStorage.clear()
+	} )
+	
+
+	describe( 'SessionStorage.set()', () => {
+
+		it( 'sets an item', () => {
+			SessionStorage.set( 'key', 'value' )
+			expect( SessionStorage.get( 'key' ) ).toBe( 'value' )
+		} )
+
+	} )
+	
+	
+	describe( 'SessionStorage.get()', () => {
+
+		it( 'gets an item', () => {
+			SessionStorage.set( 'key', 'value' )
+			expect( SessionStorage.get( 'key' ) ).toBe( 'value' )
+		} )
+
+		it( 'returns `undefined` for non-existing key', () => {
+			expect( SessionStorage.get( 'nonExistingKey' ) ).toBeUndefined()
+		} )
+
+	} )
+
+
+	describe( 'SessionStorage.delete()', () => {
+
+		it( 'removes an item', () => {
+			SessionStorage.set( 'key', 'value' )
+			SessionStorage.delete( 'key' )
+			expect( SessionStorage.get( 'key' ) ).toBeUndefined()
+		} )
+
+	} )
+
+
+	describe( 'SessionStorage.clear()', () => {
+
+		it( 'clears all items', () => {
+			SessionStorage.set( 'key1', 'value1' )
+			SessionStorage.set( 'key2', 'value2' )
+			SessionStorage.clear()
+			expect( SessionStorage.get( 'key1' ) ).toBeUndefined()
+			expect( SessionStorage.get( 'key2' ) ).toBeUndefined()
+		} )
+
+	} )
+
+	describe( 'SessionStorage.key()', () => {
+
+		it( 'returns the correct key for a given index', () => {
+			SessionStorage.set( 'key1', 'value1' )
+			SessionStorage.set( 'key2', 'value2' )
+			expect( SessionStorage.key( 0 ) ).toBe( 'key1' )
+			expect( SessionStorage.key( 1 ) ).toBe( 'key2' )
+		} )
+
+	} )
+
+	describe( 'SessionStorage.getLength()', () => {
+
+		it( 'returns the correct length', () => {
+			expect( SessionStorage.getLength() ).toBe( 0 )
+			SessionStorage.set( 'key1', 'value1' )
+			expect( SessionStorage.getLength() ).toBe( 1 )
+			SessionStorage.set( 'key2', 'value2' )
+			expect( SessionStorage.getLength() ).toBe( 2 )
+			SessionStorage.clear()
+			expect( SessionStorage.getLength() ).toBe( 0 )
+		} )
+
+	} )
+
+} )