From 2e790d4245c59fb893ca8310bceadf69b0c34669 Mon Sep 17 00:00:00 2001
From: Stanislav Bashkyrtsev <stanislav.bashkirtsev@gmail.com>
Date: Sat, 10 Aug 2019 11:59:50 +0300
Subject: [PATCH] (v2.5.0) Add `mixedCase()` for upper/lower case randomization

Strings like `blah` can be turned into `bLAh`.
---
 README.md                                          |  1 +
 datagen/pom.xml                                    |  2 +-
 .../main/java/io/qala/datagen/RandomShortApi.java  | 14 ++++++++++++++
 .../java/io/qala/datagen/RandomShortApiTest.java   | 13 +++++++++++--
 examples/pom.xml                                   |  2 +-
 java8types/pom.xml                                 |  2 +-
 junit5/pom.xml                                     |  2 +-
 pom.xml                                            |  2 +-
 8 files changed, 31 insertions(+), 7 deletions(-)

diff --git a/README.md b/README.md
index bcd9d57..d2843fd 100644
--- a/README.md
+++ b/README.md
@@ -80,6 +80,7 @@ import static io.qala.datagen.RandomShortApi.*;
 | `length(4).with(spacesRight(2)).english()`               |                      | `"hF  "`
 | `length(10).with(prefix("BLAH")).numeric()`              |                      | `"BLAH453677"`
 | `between(1, 10).alphanumerics(4)`                        |                      | `["cvA", "mTMDj0", "N", ""]`
+|                                                          | `mixedCase("blah")`  | `"bLaH"`
 
 ## Nulls & Blanks
 
diff --git a/datagen/pom.xml b/datagen/pom.xml
index 2fb094b..4a862d0 100644
--- a/datagen/pom.xml
+++ b/datagen/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>qala-datagen-parent</artifactId>
         <groupId>io.qala.datagen</groupId>
-        <version>2.4.0</version>
+        <version>2.5.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/datagen/src/main/java/io/qala/datagen/RandomShortApi.java b/datagen/src/main/java/io/qala/datagen/RandomShortApi.java
index 9c46ed0..6e70cc7 100644
--- a/datagen/src/main/java/io/qala/datagen/RandomShortApi.java
+++ b/datagen/src/main/java/io/qala/datagen/RandomShortApi.java
@@ -175,6 +175,20 @@ public static String specialSymbols(int exactLength) {
     public static String specialSymbols(int min, int max) {
         return between(min, max).specialSymbols();
     }
+    /**
+     * Returns a string with upper/lower case changed in random places, e.g. {@code Blah -> bLaH}
+     *
+     * @param original string to change the case of its letters, can't be null
+     * @return a string with upper/lower case letters in random places
+     */
+    public static String mixedCase(String original) {
+        char[] result = original.toCharArray();
+        for (int i = 0; i < result.length; i++) {
+            char c = result[i];
+            result[i] = bool() ? Character.toUpperCase(c) : Character.toLowerCase(c);
+        }
+        return new String(result);
+    }
 
     /**
      * Returns an array of random booleans (true/false).
diff --git a/datagen/src/test/java/io/qala/datagen/RandomShortApiTest.java b/datagen/src/test/java/io/qala/datagen/RandomShortApiTest.java
index 3fd5ee0..47a1664 100644
--- a/datagen/src/test/java/io/qala/datagen/RandomShortApiTest.java
+++ b/datagen/src/test/java/io/qala/datagen/RandomShortApiTest.java
@@ -13,8 +13,7 @@
 import static org.hamcrest.CoreMatchers.hasItem;
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.core.IsNot.not;
-import static org.junit.jupiter.api.Assertions.assertFalse;
-import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.*;
 
 @DisplayName("Functional Randomizer")
 class RandomShortApiTest {
@@ -46,6 +45,16 @@ class RandomShortApiTest {
         assertFalse(sampleMultiple(asList(integer(), integer())).isEmpty());
     }
 
+    @Test void mixedCaseReturnsSameStringWithDifferentCases() {
+        String original = alphanumeric(200);
+        String mixed = mixedCase(original);
+        assertNotEquals(original, mixed);
+        assertEquals(original.toLowerCase(), mixed.toLowerCase());
+    }
+    @Test void emptyStringInMixedCaseIsEmptyString() {
+        assertEquals("", mixedCase(blankOr("")));
+    }
+
     private void assertOnlyOneIsNull(Object o1, Object o2) {
         if (o1 == null) assertNotNull(o2);
         if (o2 == null) assertNotNull(o1);
diff --git a/examples/pom.xml b/examples/pom.xml
index 7f5ddc9..26dce0c 100644
--- a/examples/pom.xml
+++ b/examples/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>qala-datagen-parent</artifactId>
         <groupId>io.qala.datagen</groupId>
-        <version>2.4.0</version>
+        <version>2.5.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/java8types/pom.xml b/java8types/pom.xml
index c51dfe8..f82fc57 100644
--- a/java8types/pom.xml
+++ b/java8types/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>qala-datagen-parent</artifactId>
         <groupId>io.qala.datagen</groupId>
-        <version>2.4.0</version>
+        <version>2.5.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/junit5/pom.xml b/junit5/pom.xml
index 6abdee5..86ae7c9 100644
--- a/junit5/pom.xml
+++ b/junit5/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>qala-datagen-parent</artifactId>
         <groupId>io.qala.datagen</groupId>
-        <version>2.4.0</version>
+        <version>2.5.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/pom.xml b/pom.xml
index 45b751e..efa2242 100644
--- a/pom.xml
+++ b/pom.xml
@@ -7,7 +7,7 @@
     <groupId>io.qala.datagen</groupId>
     <artifactId>qala-datagen-parent</artifactId>
     <packaging>pom</packaging>
-    <version>2.4.0</version>
+    <version>2.5.0</version>
 
     <licenses>
         <license>