From 71cb446f010e791ca77a27c416a79b5ccb3f075b Mon Sep 17 00:00:00 2001
From: Jeff Sharkey <jsharkey@android.com>
Date: Wed, 30 Jan 2013 16:35:04 -0800
Subject: Add wrapping support to IndentingPrintWriter.

When created with a wrapping width, any content longer than the
requested width will be wrapped onto additional lines.  This supports
use-cases like dumping lots of data with printPair().

Improve documentation and add tests to verify behavior.

Change-Id: Ibdfce198f0e69f4df7725544fd1cd02fa029c647
---
 .../internal/util/IndentingPrintWriterTest.java    | 132 +++++++++++++++++++++
 1 file changed, 132 insertions(+)
 create mode 100644 core/tests/coretests/src/com/android/internal/util/IndentingPrintWriterTest.java

(limited to 'core/tests/coretests')

diff --git a/core/tests/coretests/src/com/android/internal/util/IndentingPrintWriterTest.java b/core/tests/coretests/src/com/android/internal/util/IndentingPrintWriterTest.java
new file mode 100644
index 0000000..6773612
--- /dev/null
+++ b/core/tests/coretests/src/com/android/internal/util/IndentingPrintWriterTest.java
@@ -0,0 +1,132 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.internal.util;
+
+import junit.framework.TestCase;
+
+import java.io.ByteArrayOutputStream;
+import java.io.PrintWriter;
+
+/**
+ * Tests for {@link IndentingPrintWriter}.
+ */
+public class IndentingPrintWriterTest extends TestCase {
+
+    private ByteArrayOutputStream mStream;
+    private PrintWriter mWriter;
+
+    @Override
+    protected void setUp() throws Exception {
+        super.setUp();
+
+        mStream = new ByteArrayOutputStream();
+        mWriter = new PrintWriter(mStream);
+    }
+
+    public void testMultipleIndents() throws Exception {
+        final IndentingPrintWriter pw = new IndentingPrintWriter(mWriter, "  ");
+
+        pw.print("Hello");
+        pw.increaseIndent();
+        pw.println();
+        pw.print("World");
+        pw.increaseIndent();
+        pw.println();
+        pw.print("And");
+        pw.decreaseIndent();
+        pw.println();
+        pw.print("Goodbye");
+        pw.decreaseIndent();
+        pw.println();
+        pw.print("World");
+        pw.println();
+
+        pw.flush();
+        assertEquals("Hello\n  World\n    And\n  Goodbye\nWorld\n", mStream.toString());
+    }
+
+    public void testAdjustIndentAfterNewline() throws Exception {
+        final IndentingPrintWriter pw = new IndentingPrintWriter(mWriter, "  ");
+
+        pw.println("Hello");
+        pw.increaseIndent();
+        pw.println("World");
+
+        pw.flush();
+        assertEquals("Hello\n  World\n", mStream.toString());
+    }
+
+    public void testWrapping() throws Exception {
+        final IndentingPrintWriter pw = new IndentingPrintWriter(mWriter, "", 10);
+
+        pw.print("dog ");
+        pw.print("cat ");
+        pw.print("cow ");
+        pw.print("meow ");
+
+        pw.flush();
+        assertEquals("dog cat \ncow meow ", mStream.toString());
+    }
+
+    public void testWrappingIndented() throws Exception {
+        final IndentingPrintWriter pw = new IndentingPrintWriter(mWriter, "    ", 10);
+
+        pw.increaseIndent();
+        pw.print("dog ");
+        pw.print("meow ");
+        pw.print("a ");
+        pw.print("b ");
+        pw.print("cow ");
+
+        pw.flush();
+        assertEquals("    dog \n    meow \n    a b \n    cow ", mStream.toString());
+    }
+
+    public void testWrappingEmbeddedNewlines() throws Exception {
+        final IndentingPrintWriter pw = new IndentingPrintWriter(mWriter, "  ", 10);
+
+        pw.increaseIndent();
+        pw.print("Lorem ipsum \ndolor sit \namet, consectetur \nadipiscing elit.");
+
+        pw.flush();
+        assertEquals("  Lorem ip\n  sum \n  dolor si\n  t \n  amet, co\n"
+                + "  nsectetu\n  r \n  adipisci\n  ng elit.\n", mStream.toString());
+    }
+
+    public void testWrappingSingleGiant() throws Exception {
+        final IndentingPrintWriter pw = new IndentingPrintWriter(mWriter, "  ", 10);
+
+        pw.increaseIndent();
+        pw.print("Lorem ipsum dolor sit amet, consectetur adipiscing elit.");
+
+        pw.flush();
+        assertEquals("  Lorem ip\n  sum dolo\n  r sit am\n  et, cons\n"
+                + "  ectetur \n  adipisci\n  ng elit.\n", mStream.toString());
+    }
+
+    public void testWrappingPrefixedGiant() throws Exception {
+        final IndentingPrintWriter pw = new IndentingPrintWriter(mWriter, "  ", 10);
+
+        pw.increaseIndent();
+        pw.print("foo");
+        pw.print("Lorem ipsum dolor sit amet, consectetur adipiscing elit.");
+
+        pw.flush();
+        assertEquals("  foo\n  Lorem ip\n  sum dolo\n  r sit am\n  et, cons\n"
+                + "  ectetur \n  adipisci\n  ng elit.\n", mStream.toString());
+    }
+}
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