chore: merge "Tests check anagrams (#693)"

* add test cases for checkAnagram function to cover additional inputs and edge cases

* adjust spacing between tests to be more consistent with other files

* update CheckAnagram to return boolean value instead of string

* add a reference link and definition of Anagram to CheckAnagram documentation

String/test/CheckAnagram.test.js

@@ -16,16 +16,73 @@ describe('checkAnagram', () => {
       expect(SUT).toBe('Not string(s)')
     }
   )
-  it('expects to return "Not anagram" if the arguments have different lengths', () => {
+
+  it('expects to return false if the arguments have different lengths', () => {
     const SUT = checkAnagram('abs', 'abds')
-    expect(SUT).toBe('Not anagrams')
+    expect(SUT).toBe(false)
   })
-  it('expects to return "Not anagram" if the arguments are not anagrams', () => {
+
+  it('expects to return false if the arguments are not anagrams', () => {
     const SUT = checkAnagram('abcs', 'abds')
-    expect(SUT).toBe('Not anagrams')
+    expect(SUT).toBe(false)
   })
-  it('expects to return "Anagram" if the arguments are anagram', () => {
+
+  it('expects to return true if the arguments are anagrams', () => {
     const SUT = checkAnagram('abcd', 'bcad')
-    expect(SUT).toBe('Anagrams')
+    expect(SUT).toBe(true)
+  })
+
+  it('expects to return true if the arguments of length 1 and are the same letter', () => {
+    const SUT = checkAnagram('a', 'a')
+    expect(SUT).toBe(true)
+  })
+
+  it('expects to return true if the arguments of are both empty strings', () => {
+    const SUT = checkAnagram('', '')
+    expect(SUT).toBe(true)
+  })
+
+  it('expects to return true if the arguments are anagrams with an odd length', () => {
+    const SUT = checkAnagram('abcde', 'edcab')
+    expect(SUT).toBe(true)
+  })
+
+  it('expects to return true if the arguments are anagrams with an even length', () => {
+    const SUT = checkAnagram('abcdef', 'fedcab')
+    expect(SUT).toBe(true)
+  })
+
+  it('expects to return false if either argument is an empty string while the other is not', () => {
+    const SUT = checkAnagram('', 'edcab')
+    expect(SUT).toBe(false)
+    const SUT2 = checkAnagram('edcab', '')
+    expect(SUT2).toBe(false)
+  })
+
+  it('expects to return false if the arguments contain the same letters but have unequal case', () => {
+    const SUT = checkAnagram('ABDCE', 'abcde')
+    expect(SUT).toBe(false)
+    const SUT2 = checkAnagram('AbCdE', 'aBCdE')
+    expect(SUT2).toBe(false)
+  })
+
+  it('expects to return true if the arguments are anagrams and contain number characters', () => {
+    const SUT = checkAnagram('a1b2', '12ba')
+    expect(SUT).toBe(true)
+  })
+
+  it('expects to return true if the arguments are anagrams and contain space characters', () => {
+    const SUT = checkAnagram('a1 b2', '1 2ba')
+    expect(SUT).toBe(true)
+  })
+
+  it('expects to return true if the arguments are anagrams and contain punctuation characters', () => {
+    const SUT = checkAnagram('a!1b@2', '1@2ba!')
+    expect(SUT).toBe(true)
+  })
+
+  it('expects to return false if the arguments contain the same letters but contain a different amount of space characters', () => {
+    const SUT = checkAnagram('ea        cb', 'e cba')
+    expect(SUT).toBe(false)
   })
 })