add iterable tests

Author: Alan-95-hub

src/test/java/org/cactoos/iterable/CycledTest.java

@@ -48,4 +48,16 @@ void notCycledEmptyTest() {
             new HasValue<>(0L)
         ).affirm();
     }
+
+    @Test
+    void varargsConstructorTest() {
+        new Assertion<>(
+            "Must repeat varargs",
+            new ItemAt<>(
+                6,
+                new Cycled<>(1, 2, 3, 4)
+            ),
+            new HasValue<>(3)
+        ).affirm();
+    }
 }

src/test/java/org/cactoos/iterable/FilteredTest.java

@@ -142,4 +142,15 @@ void filterWithNumberFilter() {
         ).affirm();
     }
 
+    @Test
+    void varargsConstructorTest() {
+        new Assertion<>(
+            "Must have filtered varargs",
+            new Filtered<>(
+                num -> num % 2 == 0,
+                1, 2, 3, 4, 11, 20
+            ),
+            new HasValues<>(2, 4, 20)
+        ).affirm();
+    }
 }

src/test/java/org/cactoos/iterable/HeadOfTest.java

@@ -32,4 +32,15 @@ void headIterable() {
         );
     }
 
+    @Test
+    void varargsConstructorTest() {
+        MatcherAssert.assertThat(
+            "Must skip elements from varargs",
+            new HeadOf<>(
+                2,
+                1, 2, 3, 4
+            ),
+            new HasValues<>(1, 2)
+        );
+    }
 }

src/test/java/org/cactoos/iterable/IterableOfBytesTest.java

@@ -38,4 +38,13 @@ void convertsBytesToIterable() {
             new HasValues<>(bytes[0], bytes[1], bytes[2])
         ).affirm();
     }
+
+    @Test
+    void convertsStringToIterableOfBytes() {
+        new Assertion<>(
+            "Must create Iterable from String",
+            new IterableOfBytes("TEST"),
+            new HasValues<>((byte) 'T', (byte) 'E', (byte) 'S', (byte) 'T')
+        ).affirm();
+    }
 }

src/test/java/org/cactoos/iterable/ReversedTest.java

@@ -100,4 +100,13 @@ void isEmpty() {
             new IsNot<>(new IsEmptyIterable<>())
         ).affirm();
     }
+
+    @Test
+    void reversesVarargs() {
+        new Assertion<>(
+            "Must reverse varargs",
+            new Reversed<>(1, 2, 3, 4),
+            new IsEqual<>(new IterableOf<>(4, 3, 2, 1))
+        ).affirm();
+    }
 }

src/test/java/org/cactoos/iterable/ShuffledTest.java

@@ -65,4 +65,13 @@ void shuffleIterableWithRandomized() {
             )
         ).affirm();
     }
+
+    @Test
+    void shufflesVarargs() {
+        new Assertion<>(
+            "Must shuffle elements from varargs",
+            new Shuffled<>(1, 2, 3, 4, 4, 5),
+            new HasValues<>(1, 2, 3, 4, 4, 5)
+        ).affirm();
+    }
 }