From d67ace8e1e45a3b301a7358ae726f371468381dd Mon Sep 17 00:00:00 2001
From: Tomasz Lelek <tomekl007@gmail.com>
Date: Fri, 24 Feb 2017 16:19:28 +0100
Subject: [PATCH] BAEL-655 test for partially apllied function (#1227)

* BAEL-655 test for partially apllied function

* BAEL-655 example of tuple transformation
---
 jooq/src/test/java/com/baeldung/JOOLTest.java | 37 +++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/jooq/src/test/java/com/baeldung/JOOLTest.java b/jooq/src/test/java/com/baeldung/JOOLTest.java
index 18fca1f67a..13bf1a3ec3 100644
--- a/jooq/src/test/java/com/baeldung/JOOLTest.java
+++ b/jooq/src/test/java/com/baeldung/JOOLTest.java
@@ -1,8 +1,15 @@
 package com.baeldung;
 
 
+import junit.framework.Assert;
 import org.jooq.lambda.Seq;
 import org.jooq.lambda.Unchecked;
+import org.jooq.lambda.function.Function1;
+import org.jooq.lambda.function.Function2;
+import org.jooq.lambda.tuple.Tuple;
+import org.jooq.lambda.tuple.Tuple2;
+import org.jooq.lambda.tuple.Tuple3;
+import org.jooq.lambda.tuple.Tuple4;
 import org.junit.Test;
 
 import java.util.Arrays;
@@ -203,4 +210,34 @@ public class JOOLTest {
         );
     }
 
+    @Test
+    public void givenFunction_whenAppliedPartially_shouldAddNumberToPartialArgument() {
+        //given
+        Function2<Integer, Integer, Integer> addTwoNumbers = (v1, v2) -> v1 + v2;
+        addTwoNumbers.toBiFunction();
+        Function1<Integer, Integer> addToTwo = addTwoNumbers.applyPartially(2);
+
+        //when
+        Integer result = addToTwo.apply(5);
+
+        //then
+        assertEquals(result, (Integer) 7);
+    }
+
+    @Test
+    public void givenSeqOfTuples_whenTransformToLowerNumberOfTuples_shouldHaveProperResult() {
+        //given
+        Seq<Tuple3<String, String, Integer>> personDetails = Seq.of(tuple("michael", "similar", 49), tuple("jodie", "variable", 43));
+        Tuple2<String, String> tuple = tuple("winter", "summer");
+
+        //when
+        List<Tuple4<String, String, String, String>> result = personDetails.map(t -> t.limit2().concat(tuple)).toList();
+
+        //then
+        assertEquals(
+          result,
+          Arrays.asList(tuple("michael", "similar", "winter", "summer"), tuple("jodie", "variable", "winter", "summer"))
+        );
+    }
+
 }