Update anagram.test.ts

exercises/practice/anagram/anagram.test.ts

@@ -1,33 +1,40 @@
 import { describe, it, expect, xit } from '@jest/globals'
 import { Anagram } from './anagram.ts'
 
+const areSetsEqual = <T>(setA: Set<T>, setB: Set<T>): boolean =>
+  setA.size === setB.size && [...setA].every((val) => setB.has(val))
+
 describe('Anagram', () => {
   it('no matches', () => {
     const subject = new Anagram('diaper')
     const matches = subject.matches('hello', 'world', 'zombies', 'pants')
+    const expected = []
 
-    expect(matches).toEqual([])
+    expect(areSetsEqual(new Set(expected), new Set(matches))).toEqual(true)
   })
 
   xit('detects two anagrams', () => {
     const subject = new Anagram('solemn')
     const matches = subject.matches('lemons', 'cherry', 'melons')
+    const expected = ['lemons', 'melons']
 
-    expect(matches).toEqual(['lemons', 'melons'])
+    expect(areSetsEqual(new Set(expected), new Set(matches))).toEqual(true)
   })
 
   xit('does not detect anagram subsets', () => {
     const subject = new Anagram('good')
     const matches = subject.matches('dog', 'goody')
+    const expected = []
 
-    expect(matches).toEqual([])
+    expect(areSetsEqual(new Set(expected), new Set(matches))).toEqual(true)
   })
 
   xit('detects anagram', () => {
     const subject = new Anagram('listen')
     const matches = subject.matches('enlists', 'google', 'inlets', 'banana')
+    const expected = ['inlets']
 
-    expect(matches).toEqual(['inlets'])
+    expect(areSetsEqual(new Set(expected), new Set(matches))).toEqual(true)
   })
 
   xit('detects three anagrams', () => {
@@ -40,98 +47,112 @@ describe('Anagram', () => {
       'largely',
       'leading'
     )
+    const expected = ['gallery', 'regally', 'largely']
 
-    expect(matches).toEqual(['gallery', 'regally', 'largely'])
+    expect(areSetsEqual(new Set(expected), new Set(matches))).toEqual(true)
   })
 
   xit('detects multiple anagrams with different case', () => {
     const subject = new Anagram('nose')
     const matches = subject.matches('Eons', 'ONES')
+    const expected = ['Eons', 'ONES']
 
-    expect(matches).toEqual(['Eons', 'ONES'])
+    expect(areSetsEqual(new Set(expected), new Set(matches))).toEqual(true)
   })
 
   xit('does not detect non-anagrams with identical checksum', () => {
     const subject = new Anagram('mass')
     const matches = subject.matches('last')
+    const expected = []
 
-    expect(matches).toEqual([])
+    expect(areSetsEqual(new Set(expected), new Set(matches))).toEqual(true)
   })
 
   xit('detects anagrams case-insensitively', () => {
     const subject = new Anagram('Orchestra')
     const matches = subject.matches('cashregister', 'Carthorse', 'radishes')
+    const expected = ['Carthorse']
 
-    expect(matches).toEqual(['Carthorse'])
+    expect(areSetsEqual(new Set(expected), new Set(matches))).toEqual(true)
   })
 
   xit('detects anagrams using case-insensitive subject', () => {
     const subject = new Anagram('Orchestra')
     const matches = subject.matches('cashregister', 'carthorse', 'radishes')
+    const expected = ['carthorse']
 
-    expect(matches).toEqual(['carthorse'])
+    expect(areSetsEqual(new Set(expected), new Set(matches))).toEqual(true)
   })
 
   xit('detects anagrams using case-insensitive possible matches', () => {
     const subject = new Anagram('orchestra')
     const matches = subject.matches('cashregister', 'Carthorse', 'radishes')
+    const expected = ['Carthorse']
 
-    expect(matches).toEqual(['Carthorse'])
+    expect(areSetsEqual(new Set(expected), new Set(matches))).toEqual(true)
   })
 
   xit('does not detect an anagram if the original word is repeated', () => {
     const subject = new Anagram('go')
     const matches = subject.matches('go Go GO')
+    const expected = []
 
-    expect(matches).toEqual([])
+    expect(areSetsEqual(new Set(expected), new Set(matches))).toEqual(true)
   })
 
   xit('anagrams must use all letters exactly once', () => {
     const subject = new Anagram('tapper')
     const matches = subject.matches('patter')
+    const expected = []
 
-    expect(matches).toEqual([])
+    expect(areSetsEqual(new Set(expected), new Set(matches))).toEqual(true)
   })
 
   xit('words are not anagrams of themselves', () => {
     const subject = new Anagram('BANANA')
     const matches = subject.matches('BANANA')
+    const expected = []
 
-    expect(matches).toEqual([])
+    expect(areSetsEqual(new Set(expected), new Set(matches))).toEqual(true)
   })
 
   xit('words are not anagrams of themselves even if letter case is partially different', () => {
     const subject = new Anagram('BANANA')
     const matches = subject.matches('Banana')
+    const expected = []
 
-    expect(matches).toEqual([])
+    expect(areSetsEqual(new Set(expected), new Set(matches))).toEqual(true)
   })
 
   xit('words are not anagrams of themselves even if letter case is completely different', () => {
     const subject = new Anagram('BANANA')
     const matches = subject.matches('Banana')
+    const expected = []
 
-    expect(matches).toEqual([])
+    expect(areSetsEqual(new Set(expected), new Set(matches))).toEqual(true)
   })
 
   xit('words other than themselves can be anagrams', () => {
     const subject = new Anagram('LISTEN')
     const matches = subject.matches('LISTEN', 'Silent')
+    const expected = ['Silent']
 
-    expect(matches).toEqual(['Silent'])
+    expect(areSetsEqual(new Set(expected), new Set(matches))).toEqual(true)
   })
 
   xit('matches() accepts string arguments', () => {
     const subject = new Anagram('ant')
     const matches = subject.matches('stand', 'tan', 'at')
+    const expected = ['tan']
 
-    expect(matches).toEqual(['tan'])
+    expect(areSetsEqual(new Set(expected), new Set(matches))).toEqual(true)
   })
 
   xit('matches() accepts single string argument', () => {
     const subject = new Anagram('ant')
     const matches = subject.matches('tan')
+    const expected = ['tan']
 
-    expect(matches).toEqual(['tan'])
+    expect(areSetsEqual(new Set(expected), new Set(matches))).toEqual(true)
   })
 })