Merge pull request #137 from MaurizioPz/#133

Added tests for ETag

__tests__/modules/etag.test.ts

@@ -1,4 +1,5 @@
 import { eTag } from '../../packages/etag/src'
+import { Stats } from 'fs'
 
 describe('etag(entity)', () => {
   it('should require an entity', () => {
@@ -18,4 +19,31 @@ describe('etag(entity)', () => {
     expect(eTag('论')).toBe('"3-QkSKq8sXBjHL2tFAZknA2n6LYzM"')
     expect(eTag('论', { weak: true })).toBe('W/"3-QkSKq8sXBjHL2tFAZknA2n6LYzM"')
   })
+  it('should reject number entities', function () {
+    expect(() => eTag(<any>1)).toThrow('Received type number')
+  })
+  describe('Buffer', () => {
+    it('should work on empty', function () {
+      expect(eTag(Buffer.from(''))).toBe('"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk"')
+    })
+    it('should generate a strong ETag', () => {
+      expect(eTag(Buffer.from('beep boop'))).toBe('"9-fINXV39R1PCo05OqGqr7KIY9lCE"')
+    })
+  })
+  describe('fs.Stats', () => {
+    it('should generate a weak ETag', () => {
+      const stats = new Stats()
+      stats.mtime = new Date(Date.UTC(2020, 1, 1))
+      stats.size = 1024
+      expect(eTag(stats)).toBe('W/"16ffe0c0c00-400"')
+    })
+  })
+  describe('weak', () => {
+    it('should generate a weak ETag', () => {
+      expect(eTag('beep boop', { weak: true })).toBe('W/"9-fINXV39R1PCo05OqGqr7KIY9lCE"')
+    })
+    it('should generate a strong ETag', () => {
+      expect(eTag('beep boop', { weak: false })).toBe('"9-fINXV39R1PCo05OqGqr7KIY9lCE"')
+    })
+  })
 })