Use round() instead of floor() in repeat, add unit test

src/blocks/scratch3_control.js

@@ -49,7 +49,7 @@ class Scratch3ControlBlocks {
     }
 
     repeat (args, util) {
-        const times = Math.floor(Cast.toNumber(args.TIMES));
+        const times = Math.round(Cast.toNumber(args.TIMES));
         // Initialize loop
         if (typeof util.stackFrame.loopCounter === 'undefined') {
             util.stackFrame.loopCounter = times;

test/unit/blocks_control.js

@@ -31,6 +31,33 @@ test('repeat', t => {
     t.end();
 });
 
+test('repeat rounds with round()', t => {
+    const rt = new Runtime();
+    const c = new Control(rt);
+
+    const roundingTest = (inputForRepeat, expectedTimes) => {
+        // Test harness (mocks `util`)
+        let i = 0;
+        const util = {
+            stackFrame: Object.create(null),
+            startBranch: function () {
+                i++;
+                c.repeat({TIMES: inputForRepeat}, util);
+            }
+        };
+
+        // Execute test
+        c.repeat({TIMES: inputForRepeat}, util);
+        t.strictEqual(i, expectedTimes);
+    };
+
+    // Execute tests
+    roundingTest(3.2, 3);
+    roundingTest(3.7, 4);
+    roundingTest(3.5, 4);
+    t.end();
+});
+
 test('repeatUntil', t => {
     const rt = new Runtime();
     const c = new Control(rt);