From 9dfa0b538509b1336a0afa3f26e3fe750d93a7cb Mon Sep 17 00:00:00 2001
From: Andy Wilkinson <awilkinson@pivotal.io>
Date: Fri, 29 Jan 2016 11:15:45 +0000
Subject: [PATCH] Polish PatternReplacingContentModifier

---
 .../PatternReplacingContentModifier.java         | 16 ++++++++--------
 .../PatternReplacingContentModifierTests.java    | 13 +++++++++++++
 2 files changed, 21 insertions(+), 8 deletions(-)

diff --git a/spring-restdocs-core/src/main/java/org/springframework/restdocs/operation/preprocess/PatternReplacingContentModifier.java b/spring-restdocs-core/src/main/java/org/springframework/restdocs/operation/preprocess/PatternReplacingContentModifier.java
index 58d4e3a7..7fe67754 100644
--- a/spring-restdocs-core/src/main/java/org/springframework/restdocs/operation/preprocess/PatternReplacingContentModifier.java
+++ b/spring-restdocs-core/src/main/java/org/springframework/restdocs/operation/preprocess/PatternReplacingContentModifier.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2015 the original author or authors.
+ * Copyright 2014-2016 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -35,8 +35,8 @@ class PatternReplacingContentModifier implements ContentModifier {
 	private final String replacement;
 
 	/**
-	 * Creates a new {@link PatternReplacingContentModifier} that will replace occurences
-	 * the given {@code pattern} with the given {@code replacement}.
+	 * Creates a new {@link PatternReplacingContentModifier} that will replace occurrences
+	 * of the given {@code pattern} with the given {@code replacement}.
 	 *
 	 * @param pattern the pattern
 	 * @param replacement the replacement
@@ -56,7 +56,7 @@ class PatternReplacingContentModifier implements ContentModifier {
 			original = new String(content);
 		}
 		Matcher matcher = this.pattern.matcher(original);
-		StringBuilder buffer = new StringBuilder();
+		StringBuilder builder = new StringBuilder();
 		int previous = 0;
 		while (matcher.find()) {
 			String prefix;
@@ -68,13 +68,13 @@ class PatternReplacingContentModifier implements ContentModifier {
 				prefix = original.substring(previous, matcher.start());
 				previous = matcher.end();
 			}
-			buffer.append(prefix);
-			buffer.append(this.replacement);
+			builder.append(prefix);
+			builder.append(this.replacement);
 		}
 		if (previous < original.length()) {
-			buffer.append(original.substring(previous));
+			builder.append(original.substring(previous));
 		}
-		return buffer.toString().getBytes();
+		return builder.toString().getBytes();
 	}
 
 }
diff --git a/spring-restdocs-core/src/test/java/org/springframework/restdocs/operation/preprocess/PatternReplacingContentModifierTests.java b/spring-restdocs-core/src/test/java/org/springframework/restdocs/operation/preprocess/PatternReplacingContentModifierTests.java
index 1046cad9..9d37ed78 100644
--- a/spring-restdocs-core/src/test/java/org/springframework/restdocs/operation/preprocess/PatternReplacingContentModifierTests.java
+++ b/spring-restdocs-core/src/test/java/org/springframework/restdocs/operation/preprocess/PatternReplacingContentModifierTests.java
@@ -46,6 +46,19 @@ public class PatternReplacingContentModifierTests {
 				is(equalTo("{\"id\" : \"<<uuid>>\"}".getBytes())));
 	}
 
+	@Test
+	public void contentThatDoesNotMatchIsUnchanged() throws Exception {
+		Pattern pattern = Pattern.compile(
+				"[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}",
+				Pattern.CASE_INSENSITIVE);
+		PatternReplacingContentModifier contentModifier = new PatternReplacingContentModifier(
+				pattern, "<<uuid>>");
+		assertThat(
+				contentModifier.modifyContent(
+						"{\"id\" : \"CA76-ED42-11CE-BACD\"}".getBytes(), null),
+				is(equalTo("{\"id\" : \"CA76-ED42-11CE-BACD\"}".getBytes())));
+	}
+
 	@Test
 	public void encodingIsPreserved() {
 		String japaneseContent = "\u30b3\u30f3\u30c6\u30f3\u30c4";