Add tests for sample, sampleSize

test/sample/sample.test.js

@@ -5,9 +5,13 @@ test('Testing sample', (t) => {
   //For more information on all the methods supported by tape
   //Please go to https://github.com/substack/tape
   t.true(typeof sample === 'function', 'sample is a Function');
+  const arr = [3,7,9,11];
+  t.true(arr.includes(sample(arr)), 'Returns a random element from the array');
+  t.equal(sample([1]), 1, 'Works for single-element arrays');
+  t.equal(sample([]), undefined, 'Returns undefined for empty array');
   //t.deepEqual(sample(args..), 'Expected');
   //t.equal(sample(args..), 'Expected');
   //t.false(sample(args..), 'Expected');
   //t.throws(sample(args..), 'Expected');
   t.end();
-});
+});

test/sampleSize/sampleSize.test.js

@@ -5,9 +5,15 @@ test('Testing sampleSize', (t) => {
   //For more information on all the methods supported by tape
   //Please go to https://github.com/substack/tape
   t.true(typeof sampleSize === 'function', 'sampleSize is a Function');
+  const arr = [3,7,9,11];
+  t.equal(sampleSize(arr).length, 1, 'Returns a single element without n specified');
+  t.true(sampleSize(arr, 2).every(x => arr.includes(x)), 'Returns a random sample of specified size from an array');
+  t.equal(sampleSize(arr, 5).length, 4, 'Returns all elements in an array if n >= length');
+  t.deepEqual(sampleSize([], 2), [], 'Returns an empty array if original array is empty');
+  t.deepEqual(sampleSize(arr, 0), [], 'Returns an empty array if n = 0');
   //t.deepEqual(sampleSize(args..), 'Expected');
   //t.equal(sampleSize(args..), 'Expected');
   //t.false(sampleSize(args..), 'Expected');
   //t.throws(sampleSize(args..), 'Expected');
   t.end();
-});
+});

test/shuffle/shuffle.test.js

@@ -6,7 +6,10 @@ test('Testing shuffle', (t) => {
   //Please go to https://github.com/substack/tape
   t.true(typeof shuffle === 'function', 'shuffle is a Function');
   const arr = [1,2,3,4,5,6];
-  //t.notDeepEqual(shuffle(arr), arr, 'Shuffles the array'); Does not work always (got a test failing once)
+  t.notEqual(shuffle(arr), arr, 'Shuffles the array');
+  t.true(shuffle(arr).every(x => arr.includes(x)), 'New array contains all original elements');
+  t.deepEqual(shuffle([]),[],'Works for empty arrays');
+  t.deepEqual(shuffle([1]),[1],'Works for single-element arrays');
   //t.deepEqual(shuffle(args..), 'Expected');
   //t.equal(shuffle(args..), 'Expected');
   //t.false(shuffle(args..), 'Expected');

test/testlog

@@ -1,4 +1,4 @@
-Test log for: Thu Feb 08 2018 16:12:32 GMT+0200 (GTB Standard Time)
+Test log for: Fri Feb 09 2018 13:05:56 GMT+0200 (GTB Standard Time)
 
 > 30-seconds-of-code@0.0.1 test G:\My Files\git Repositories\30-seconds-of-code
 > tape test/**/*.test.js | tap-spec
@@ -1296,10 +1296,18 @@ Test log for: Thu Feb 08 2018 16:12:32 GMT+0200 (GTB Standard Time)
   Testing sample
 
     √ sample is a Function
+    √ Returns a random element from the array
+    √ Works for single-element arrays
+    √ Returns undefined for empty array
 
   Testing sampleSize
 
     √ sampleSize is a Function
+    √ Returns a single element without n specified
+    √ Returns a random sample of specified size from an array
+    √ Returns all elements in an array if n >= length
+    √ Returns an empty array if original array is empty
+    √ Returns an empty array if n = 0
 
   Testing scrollToTop
 
@@ -1332,6 +1340,10 @@ Test log for: Thu Feb 08 2018 16:12:32 GMT+0200 (GTB Standard Time)
   Testing shuffle
 
     √ shuffle is a Function
+    √ Shuffles the array
+    √ New array contains all original elements
+    √ Works for empty arrays
+    √ Works for single-element arrays
 
   Testing similarity
 
@@ -1758,8 +1770,8 @@ Test log for: Thu Feb 08 2018 16:12:32 GMT+0200 (GTB Standard Time)
     √ Works with multiple promises
 
 
-  total:     856
+  total:     868
-  passing:   856
+  passing:   868
   duration:  2.4s