test: add comprehensive tests for improved ApplicationData typization

Co-authored-by: mandrake-sw <174416152+mandrake-sw@users.noreply.github.com>

Author: Copilot

test/unit/application-data-types.spec.ts

@@ -0,0 +1,104 @@
+import test from 'node:test'
+import assert from 'node:assert'
+
+import { ApplicationTag, BACNetAppData, CalendarWeekDay, CalendarDateRange } from '../../src'
+
+test.describe('ApplicationData types', () => {
+	test('should correctly type OCTET_STRING as number[]', () => {
+		const octetStringData: BACNetAppData<ApplicationTag.OCTET_STRING> = {
+			type: ApplicationTag.OCTET_STRING,
+			value: [0x01, 0x02, 0x03, 0x04],
+		}
+		
+		assert.strictEqual(octetStringData.type, ApplicationTag.OCTET_STRING)
+		assert.ok(Array.isArray(octetStringData.value))
+		assert.strictEqual(octetStringData.value[0], 0x01)
+	})
+
+	test('should correctly type BOOLEAN as boolean', () => {
+		const booleanData: BACNetAppData<ApplicationTag.BOOLEAN> = {
+			type: ApplicationTag.BOOLEAN,
+			value: true,
+		}
+		
+		assert.strictEqual(booleanData.type, ApplicationTag.BOOLEAN)
+		assert.strictEqual(typeof booleanData.value, 'boolean')
+		assert.strictEqual(booleanData.value, true)
+	})
+
+	test('should correctly type EMPTYLIST as unknown[]', () => {
+		const emptyListData: BACNetAppData<ApplicationTag.EMPTYLIST> = {
+			type: ApplicationTag.EMPTYLIST,
+			value: [],
+		}
+		
+		assert.strictEqual(emptyListData.type, ApplicationTag.EMPTYLIST)
+		assert.ok(Array.isArray(emptyListData.value))
+		assert.strictEqual(emptyListData.value.length, 0)
+	})
+
+	test('should correctly type WEEKNDAY as CalendarWeekDay', () => {
+		const weekDayData: BACNetAppData<ApplicationTag.WEEKNDAY> = {
+			type: ApplicationTag.WEEKNDAY,
+			value: {
+				len: 4,
+				month: 1,
+				week: 1,
+				wday: 1,
+			} as CalendarWeekDay,
+		}
+		
+		assert.strictEqual(weekDayData.type, ApplicationTag.WEEKNDAY)
+		assert.strictEqual(typeof weekDayData.value, 'object')
+		assert.strictEqual(weekDayData.value.month, 1)
+	})
+
+	test('should correctly type DATERANGE as CalendarDateRange', () => {
+		const dateRangeData: BACNetAppData<ApplicationTag.DATERANGE> = {
+			type: ApplicationTag.DATERANGE,
+			value: {
+				len: 16,
+				startDate: {
+					len: 8,
+					value: new Date('2024-01-01'),
+				},
+				endDate: {
+					len: 8,
+					value: new Date('2024-12-31'),
+				},
+			} as CalendarDateRange,
+		}
+		
+		assert.strictEqual(dateRangeData.type, ApplicationTag.DATERANGE)
+		assert.strictEqual(typeof dateRangeData.value, 'object')
+		assert.strictEqual(dateRangeData.value.len, 16)
+	})
+
+	test('should correctly type DATETIME as Date', () => {
+		const dateTimeData: BACNetAppData<ApplicationTag.DATETIME> = {
+			type: ApplicationTag.DATETIME,
+			value: new Date('2024-01-01T12:00:00Z'),
+		}
+		
+		assert.strictEqual(dateTimeData.type, ApplicationTag.DATETIME)
+		assert.ok(dateTimeData.value instanceof Date)
+		assert.strictEqual(dateTimeData.value.getFullYear(), 2024)
+	})
+
+	test('should allow complex structures with unknown for untyped entries', () => {
+		const complexData: BACNetAppData<ApplicationTag.WEEKLY_SCHEDULE> = {
+			type: ApplicationTag.WEEKLY_SCHEDULE,
+			value: {
+				// This can be any complex structure for now
+				scheduleId: 123,
+				entries: [
+					{ day: 'Monday', schedule: [] },
+					{ day: 'Tuesday', schedule: [] },
+				],
+			} as unknown,
+		}
+		
+		assert.strictEqual(complexData.type, ApplicationTag.WEEKLY_SCHEDULE)
+		assert.strictEqual(typeof complexData.value, 'object')
+	})
+})