test(logger): add filter function

test/logger/filter.test.ts

@@ -0,0 +1,62 @@
+import { describe, expect, it } from 'bun:test'
+
+import { filterLog } from '~/logger/filter'
+import { LogLevel, Options } from '~/types'
+
+describe('filterLog', () => {
+  const logLevel: LogLevel = 'info'
+  const status = 200
+  const method = 'GET'
+
+  it('should return true if no filter is provided', () => {
+    expect(filterLog(logLevel, status, method)).toBe(true)
+  })
+
+  it('should filter by log level (single value)', () => {
+    const options: Options = { config: { logFilter: { level: 'error' } } }
+    expect(filterLog(logLevel, status, method, options)).toBe(false)
+  })
+
+  it('should filter by log level (array)', () => {
+    const options: Options = {
+      config: { logFilter: { level: ['error', 'info'] } }
+    }
+    expect(filterLog(logLevel, status, method, options)).toBe(true)
+  })
+
+  it('should filter by status (single value)', () => {
+    const options: Options = { config: { logFilter: { status: 404 } } }
+    expect(filterLog(logLevel, status, method, options)).toBe(false)
+  })
+
+  it('should filter by status (array)', () => {
+    const options: Options = { config: { logFilter: { status: [200, 404] } } }
+    expect(filterLog(logLevel, status, method, options)).toBe(true)
+  })
+
+  it('should filter by method (single value)', () => {
+    const options: Options = { config: { logFilter: { method: 'POST' } } }
+    expect(filterLog(logLevel, status, method, options)).toBe(false)
+  })
+
+  it('should filter by method (array)', () => {
+    const options: Options = {
+      config: { logFilter: { method: ['GET', 'POST'] } }
+    }
+    expect(filterLog(logLevel, status, method, options)).toBe(true)
+  })
+
+  it('should return false if any filter condition is not met', () => {
+    const options: Options = {
+      config: { logFilter: { level: 'info', status: 404, method: 'POST' } }
+    }
+    expect(filterLog(logLevel, status, method, options)).toBe(false)
+  })
+
+  it('should return true if all filter conditions are met', () => {
+    const options: Options = {
+      config: { logFilter: { level: 'info', status: 200, method: 'GET' } }
+    }
+    expect(filterLog(logLevel, status, method, options)).toBe(true)
+  })
+})