Merge pull request #7 from dykov/add-next-method

Edit method descriptions

src/main/java/io/github/dgroup/enumerable4j/Enumerable.java

@@ -47,6 +47,7 @@ public interface Enumerable<X> extends Collection<X> {
 
     /**
      * Passes each element of the collection to the given block.
+     * If no predicate (null) is given, then true is returned instead.
      * @param prd The predicate to match each element.
      * @return The true if the block never returns false or nil.
      */
@@ -62,6 +63,7 @@ default boolean all(Predicate<X> prd) {
 
     /**
      * Passes at least one element of the collection to the given block.
+     * If no predicate (null) is given, then true is returned instead.
      * @param prd The predicate to match at least one element.
      * @return The true if the block never returns false or nil.
      */
@@ -77,6 +79,7 @@ default boolean any(Predicate<X> prd) {
 
     /**
      * Doesn't passes elements of the collection to the given block.
+     * If no predicate (null) is given, then true is returned instead.
      * @param prd The predicate to match none elements.
      * @return The true if the block never returns false or nil.
      */
@@ -159,7 +162,7 @@ default X find(Predicate<X> prd, X alt) {
 
     /**
      * Returns an enumerable containing all elements, on which given function was applied.
-     * If no function (null) is given, then 'this' is returned instead.
+     * If no function (null) is given, then empty enumerable is returned instead.
      * @param fnc The function to apply to each element.
      * @param <Y> The type of target entity.
      * @return The enumerable.
@@ -197,7 +200,6 @@ default long count(Predicate<X> prd) {
      * Returns a result of the reduction of the elements in this stream,
      * using provided identity value and accumulation function operator.
      * If no function (null) is given, then identity is returned instead.
-     *
      * @param idn The identity value of the accumulation function.
      * @param opr The accumulation function operator which combining previous and current values.
      * @return Result of of combining elements.
@@ -230,6 +232,7 @@ default Enumerable<X> after(Predicate<X> prd) {
      * @param prd The function to match element after which enumerable elements should be returned.
      * @param size The number of elements the enumerable should be limited to.
      * @return The enumerable.
+     * @throws IllegalArgumentException If the size is negative.
      */
     default Enumerable<X> after(Predicate<X> prd, long size) {
         final Enumerable<X> out;

src/test/java/io/github/dgroup/enumerable4j/FindTest.java

@@ -77,7 +77,7 @@ void altFind() {
     @Test
     void altNullPredicate() {
         new Assertion<>(
-            "In case of null predicate we will get the same enumerable",
+            "In case of null predicate, we get the alternative result",
             new Linked<>(1, 2, 3).find(null, 100),
             new IsEqual<>(100)
         ).affirm();

src/test/java/io/github/dgroup/enumerable4j/MapTest.java

@@ -25,6 +25,7 @@
 package io.github.dgroup.enumerable4j;
 
 import org.hamcrest.collection.IsEmptyIterable;
+import org.hamcrest.core.AllOf;
 import org.hamcrest.core.IsNot;
 import org.junit.jupiter.api.Test;
 import org.llorllale.cactoos.matchers.Assertion;
@@ -42,7 +43,7 @@ final class MapTest {
     @Test
     void map() {
         new Assertion<>(
-            "All numbers where multiplied on 10",
+            "All numbers are multiplied by 10",
             new Linked<>(2, 3, 4).map(val -> val * 10),
             new HasValues<>(20, 30, 40)
         ).affirm();
@@ -51,7 +52,7 @@ void map() {
     @Test
     void nullFunction() {
         new Assertion<>(
-            "All numbers are the same",
+            "In case null-function, an empty enumerable is returned",
             new Linked<>(2, 3, 4).map(null),
             new IsEmptyIterable<>()
         ).affirm();
@@ -62,8 +63,9 @@ void negative() {
         new Assertion<>(
             "All numbers converted to numbers squares",
             new Linked<>(0, 1, 2, 3).map(val -> val * val),
-            new IsNot<>(
-                new HasValues<>(5, 7, 9)
+            new AllOf<>(
+                new IsNot<>(new HasValues<>(5, 7, 9)),
+                new HasValues<>(0, 1, 4, 9)
             )
         ).affirm();
     }

src/test/java/io/github/dgroup/enumerable4j/NoneTest.java

@@ -24,7 +24,6 @@
 
 package io.github.dgroup.enumerable4j;
 
-import org.hamcrest.core.IsEqual;
 import org.junit.jupiter.api.Test;
 import org.llorllale.cactoos.matchers.Assertion;
 import org.llorllale.cactoos.matchers.IsTrue;
@@ -52,7 +51,7 @@ void negative() {
         new Assertion<>(
             "All values in enumerable are negative",
             new Linked<>(1, 2, 3).none(val -> val < 0),
-            new IsEqual<>(true)
+            new IsTrue()
         ).affirm();
     }