Add test for checking that the loop command can loop only once/fall through

Author: Real-Septicake

tests/expected/test_kb_cmd.expect

@@ -2,6 +2,8 @@ loop test starting
 loop test completed
 nesting test starting
 nesting test completed
+single iteration test starting
+single iteration test completed
 char table test starting
 char table test completed
 word test starting

tests/src/test_kb_cmd.c

@@ -38,6 +38,10 @@ testEnd(loopTest, "loop test")
 testStart(nestingTest, "nesting test")
 testEnd(nestingTest, "nesting test")
 
+// Single Iteration prints
+testStart(singleIterationTest, "single iteration test")
+testEnd(singleIterationTest, "single iteration test")
+
 // Char table prints
 testStart(charTableTest, "char table test")
 testEnd(charTableTest, "char table test")
@@ -75,6 +79,11 @@ int testNestedLoop(int) {
     return 0;
 }
 
+int testSingleIteration(int) {
+    ASSERT_M(v == 1, "Expected to loop 1 time, looped %i time(s) instead", v);
+    return 0;
+}
+
 // Char table testing
 int capitalShiftTest(int) {
     ASSERT(Key_a == charToPressCMD['a'].c);
@@ -124,6 +133,15 @@ void test_main() {
         funcCMD(testNestedLoop),
         funcCMD(nestingTestEnd),
 
+        funcCMD(vReset),
+        // Single iteration test
+        funcCMD(singleIterationTestStart),
+        loopStartCMD(1),
+        funcCMD(vInc),
+        loopEndCMD(),
+        funcCMD(testSingleIteration),
+        funcCMD(singleIterationTestEnd), 
+
         // Char table values test
         funcCMD(charTableTestStart),
         funcCMD(capitalShiftTest),