From eea4d4bf3eac9d0ed7967d771234a5a60a57d24c Mon Sep 17 00:00:00 2001
From: Guy Bedford <guybedford@gmail.com>
Date: Wed, 30 May 2018 12:44:03 +0200
Subject: [PATCH] fix trim intro/outro bug

---
 src/Chunk.js        | 8 ++++----
 test/MagicString.js | 6 ++++++
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/src/Chunk.js b/src/Chunk.js
index 9798f59..117a917 100644
--- a/src/Chunk.js
+++ b/src/Chunk.js
@@ -121,12 +121,12 @@ export default class Chunk {
 
 		if (trimmed.length) {
 			if (trimmed !== this.content) {
-				this.split(this.start + trimmed.length).edit('', false);
+				this.split(this.start + trimmed.length).edit('', undefined, true);
 			}
 			return true;
 
 		} else {
-			this.edit('', false);
+			this.edit('', undefined, true);
 
 			this.intro = this.intro.replace(rx, '');
 			if (this.intro.length) return true;
@@ -142,12 +142,12 @@ export default class Chunk {
 		if (trimmed.length) {
 			if (trimmed !== this.content) {
 				this.split(this.end - trimmed.length);
-				this.edit('', false);
+				this.edit('', undefined, true);
 			}
 			return true;
 
 		} else {
-			this.edit('', false);
+			this.edit('', undefined, true);
 
 			this.outro = this.outro.replace(rx, '');
 			if (this.outro.length) return true;
diff --git a/test/MagicString.js b/test/MagicString.js
index 80421b7..0880bf1 100644
--- a/test/MagicString.js
+++ b/test/MagicString.js
@@ -1162,6 +1162,12 @@ describe( 'MagicString', () => {
 			const s = new MagicString( '  abcdefghijkl  ' );
 			assert.strictEqual( s.trim(), s );
 		});
+
+		it( 'should support trimming chunks with intro and outro', () => {
+			const s = new MagicString( '    \n' );
+			s.appendRight(4, 'test');
+			assert.strictEqual( s.trim().toString(), 'test' );
+		});
 	});
 
 	describe( 'trimLines', () => {