From 7821ee5da847fc8a9afa5fd685cf090a4fb9f72c Mon Sep 17 00:00:00 2001
From: Andreas Kutschera <andreas.kutschera@web.de>
Date: Fri, 3 Mar 2023 16:22:30 +0100
Subject: [PATCH] fix: create BigDecimal as SpecialSpecimen

Refs: #85
---
 .../nylle/javafixture/SpecimenType.java       |  3 +++
 .../javafixture/specimen/SpecialSpecimen.java | 13 +++++++++++++
 .../nylle/javafixture/SpecimenTypeTest.java   |  3 +++
 .../specimen/SpecialSpecimenTest.java         | 19 +++++++++++++++++++
 4 files changed, 38 insertions(+)

diff --git a/src/main/java/com/github/nylle/javafixture/SpecimenType.java b/src/main/java/com/github/nylle/javafixture/SpecimenType.java
index 2fb2748..3d7c5e4 100644
--- a/src/main/java/com/github/nylle/javafixture/SpecimenType.java
+++ b/src/main/java/com/github/nylle/javafixture/SpecimenType.java
@@ -165,6 +165,9 @@ public boolean isSpecialType() {
         if (asClass().equals(java.math.BigInteger.class)) {
             return true;
         }
+        if (asClass().equals(java.math.BigDecimal.class)) {
+            return true;
+        }
         if (asClass().equals(java.io.File.class)) {
             return true;
         }
diff --git a/src/main/java/com/github/nylle/javafixture/specimen/SpecialSpecimen.java b/src/main/java/com/github/nylle/javafixture/specimen/SpecialSpecimen.java
index f40ca12..420ad50 100644
--- a/src/main/java/com/github/nylle/javafixture/specimen/SpecialSpecimen.java
+++ b/src/main/java/com/github/nylle/javafixture/specimen/SpecialSpecimen.java
@@ -3,10 +3,12 @@
 import com.github.nylle.javafixture.Context;
 import com.github.nylle.javafixture.CustomizationContext;
 import com.github.nylle.javafixture.ISpecimen;
+import com.github.nylle.javafixture.PseudoRandom;
 import com.github.nylle.javafixture.SpecimenType;
 
 import java.io.File;
 import java.lang.annotation.Annotation;
+import java.math.BigDecimal;
 import java.math.BigInteger;
 import java.net.URI;
 import java.net.URISyntaxException;
@@ -44,6 +46,9 @@ public T create(CustomizationContext customizationContext, Annotation[] annotati
         if (type.asClass().equals(BigInteger.class)) {
             return (T) createBigInteger();
         }
+        if (type.asClass().equals(BigDecimal.class)) {
+            return (T) createBigDecimal();
+        }
         try {
             return (T) new URI("https://localhost/" + UUID.randomUUID());
         } catch (URISyntaxException e) {
@@ -61,4 +66,12 @@ private BigInteger createBigInteger() {
         }
         return result;
     }
+
+    private BigDecimal createBigDecimal() {
+        var bd = new BigDecimal(new PseudoRandom().nextLong(new Random().nextBoolean()));
+        if (context.getConfiguration().usePositiveNumbersOnly()) {
+            return bd.abs();
+        }
+        return bd;
+    }
 }
diff --git a/src/test/java/com/github/nylle/javafixture/SpecimenTypeTest.java b/src/test/java/com/github/nylle/javafixture/SpecimenTypeTest.java
index 5813233..f8ea0f3 100644
--- a/src/test/java/com/github/nylle/javafixture/SpecimenTypeTest.java
+++ b/src/test/java/com/github/nylle/javafixture/SpecimenTypeTest.java
@@ -16,6 +16,7 @@
 import java.io.File;
 import java.lang.reflect.ParameterizedType;
 import java.lang.reflect.Type;
+import java.math.BigDecimal;
 import java.math.BigInteger;
 import java.net.URI;
 import java.time.Duration;
@@ -262,6 +263,7 @@ void isSpecialType() {
         assertThat(new SpecimenType<File>() {}.isSpecialType()).isTrue();
         assertThat(new SpecimenType<URI>() {}.isSpecialType()).isTrue();
         assertThat(new SpecimenType<BigInteger>() {}.isSpecialType()).isTrue();
+        assertThat(new SpecimenType<BigDecimal>() {}.isSpecialType()).isTrue();
     }
 
     @TestWithCases
@@ -269,6 +271,7 @@ void isSpecialType() {
     @TestCase(class1 = File.class, bool2 = true)
     @TestCase(class1 = URI.class, bool2 = true)
     @TestCase(class1 = BigInteger.class, bool2 = true)
+    @TestCase(class1 = BigDecimal.class, bool2 = true)
     void isSpecialTypeFromClass(Class<?> value, boolean expected) {
         assertThat(SpecimenType.fromClass(value).isSpecialType()).isEqualTo(expected);
     }
diff --git a/src/test/java/com/github/nylle/javafixture/specimen/SpecialSpecimenTest.java b/src/test/java/com/github/nylle/javafixture/specimen/SpecialSpecimenTest.java
index b72463f..27ec69a 100644
--- a/src/test/java/com/github/nylle/javafixture/specimen/SpecialSpecimenTest.java
+++ b/src/test/java/com/github/nylle/javafixture/specimen/SpecialSpecimenTest.java
@@ -11,6 +11,7 @@
 
 import java.io.File;
 import java.lang.annotation.Annotation;
+import java.math.BigDecimal;
 import java.math.BigInteger;
 import java.net.URI;
 import java.util.Map;
@@ -111,4 +112,22 @@ void createNonNegativeBigInteger() {
         assertThat(actual).isNotNegative();
     }
 
+    @Test
+    @DisplayName("create BigDecimal creates random number")
+    void createBigDecimal() {
+        var sut = new SpecialSpecimen<>(new SpecimenType<BigDecimal>() {}, context);
+        var actual = sut.create(noContext(), new Annotation[0]);
+
+        assertThat(actual).isInstanceOf(BigDecimal.class);
+    }
+
+    @Test
+    @DisplayName("create BigDecimal acreates non-negative random number when context demands it")
+    void createNonNegativeBigDecimal() {
+        var context = new Context(Configuration.configure().usePositiveNumbersOnly(true));
+        var sut = new SpecialSpecimen<>(new SpecimenType<BigDecimal>() {}, context);
+        var actual = sut.create(noContext(), new Annotation[0]);
+
+        assertThat(actual).isNotNegative();
+    }
 }