BAEL-2400: Adds examples for currying

2019-03-11 07:33:59 +01:00
parent c9ac3be4c5
commit 9578f0de93
3 changed files with 169 additions and 0 deletions
@@ -0,0 +1,58 @@
+package com.baeldung.currying;
+
+import org.junit.Test;
+
+import java.time.LocalDate;
+
+import static com.baeldung.currying.Letter.LETTER_CREATOR;
+import static com.baeldung.currying.Letter.SIMPLE_CURRIED_LETTER_CREATOR;
+import static com.baeldung.currying.Letter.SIMPLE_LETTER_CREATOR;
+import static org.junit.Assert.assertEquals;
+
+public class LetterUnitTest {
+    private static final String BODY = "BODY";
+    private static final String SALUTATION = "SALUTATION";
+    private static final String RETURNING_ADDRESS = "RETURNING ADDRESS";
+    private static final String INSIDE_ADDRESS = "INSIDE ADDRESS";
+    private static final LocalDate DATE_OF_LETTER = LocalDate.of(2013, 3, 1);
+    private static final String CLOSING = "CLOSING";
+    private static final Letter SIMPLE_LETTER = new Letter(SALUTATION, BODY);
+    private static final Letter LETTER = new Letter(RETURNING_ADDRESS, INSIDE_ADDRESS, DATE_OF_LETTER, SALUTATION, BODY, CLOSING);
+
+    @Test
+    public void whenStaticCreateMethodIsCalled_thenaSimpleLetterIsCreated() {
+        assertEquals(SIMPLE_LETTER, Letter.createLetter(SALUTATION, BODY));
+    }
+
+    @Test
+    public void whenStaticBiFunctionIsCalled_thenaSimpleLetterIsCreated() {
+        assertEquals(SIMPLE_LETTER, SIMPLE_LETTER_CREATOR.apply(SALUTATION, BODY));
+    }
+
+    @Test
+    public void whenStaticSimpleCurriedFunctionIsCalled_thenaSimpleLetterIsCreated() {
+        assertEquals(SIMPLE_LETTER, SIMPLE_CURRIED_LETTER_CREATOR.apply(SALUTATION).apply(BODY));
+    }
+
+    @Test
+    public void whenStaticCurriedFunctionIsCalled_thenaLetterIsCreated() {
+        assertEquals(LETTER, LETTER_CREATOR
+            .apply(RETURNING_ADDRESS)
+            .apply(CLOSING)
+            .apply(DATE_OF_LETTER)
+            .apply(INSIDE_ADDRESS)
+            .apply(SALUTATION)
+            .apply(BODY));
+    }
+
+    @Test
+    public void whenStaticBuilderIsCalled_thenaLetterIsCreated() {
+        assertEquals(LETTER, Letter.builder()
+            .withReturnAddress(RETURNING_ADDRESS)
+            .withClosing(CLOSING)
+            .withDateOfLetter(DATE_OF_LETTER)
+            .withInsideAddress(INSIDE_ADDRESS)
+            .withSalutation(SALUTATION)
+            .withBody(BODY));
+    }
+}