xref: /external/apache-harmony/luni/src/test/api/common/org/apache/harmony/luni/tests/java/lang/StringBuffer2Test.java

/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You 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 org.apache.harmony.luni.tests.java.lang;

public class StringBuffer2Test extends junit.framework.TestCase {

	StringBuffer testBuffer;

	/**
	 * @tests java.lang.StringBuffer#StringBuffer()
	 */
	public void test_Constructor() {
		// Test for method java.lang.StringBuffer()
		new StringBuffer();
		assertTrue("Invalid buffer created", true);
	}

	/**
	 * @tests java.lang.StringBuffer#StringBuffer(int)
	 */
	public void test_ConstructorI() {
		// Test for method java.lang.StringBuffer(int)
		StringBuffer sb = new StringBuffer(8);
		assertEquals("Newly constructed buffer is of incorrect length", 0, sb
				.length());
	}

	/**
	 * @tests java.lang.StringBuffer#StringBuffer(java.lang.String)
	 */
	public void test_ConstructorLjava_lang_String() {
		// Test for method java.lang.StringBuffer(java.lang.String)

		StringBuffer sb = new StringBuffer("HelloWorld");

		assertTrue("Invalid buffer created", sb.length() == 10
				&& (sb.toString().equals("HelloWorld")));

		boolean pass = false;
		try {
			new StringBuffer(null);
		} catch (NullPointerException e) {
			pass = true;
		}
		assertTrue("Should throw NullPointerException", pass);
	}

	/**
	 * @tests java.lang.StringBuffer#append(char[])
	 */
	public void test_append$C() {
		// Test for method java.lang.StringBuffer
		// java.lang.StringBuffer.append(char [])
		char buf[] = new char[4];
		"char".getChars(0, 4, buf, 0);
		testBuffer.append(buf);
		assertEquals("Append of char[] failed",
				"This is a test bufferchar", testBuffer.toString());
	}

	/**
	 * @tests java.lang.StringBuffer#append(char[], int, int)
	 */
	public void test_append$CII() {
		// Test for method java.lang.StringBuffer
		// java.lang.StringBuffer.append(char [], int, int)
		StringBuffer sb = new StringBuffer();
		char[] buf1 = { 'H', 'e', 'l', 'l', 'o' };
		char[] buf2 = { 'W', 'o', 'r', 'l', 'd' };
		sb.append(buf1, 0, buf1.length);
		assertEquals("Buffer is invalid length after append", 5, sb.length());
		sb.append(buf2, 0, buf2.length);
		assertEquals("Buffer is invalid length after append", 10, sb.length());
		assertTrue("Buffer contains invalid chars", (sb.toString()
				.equals("HelloWorld")));
	}

	/**
	 * @tests java.lang.StringBuffer#append(char)
	 */
	public void test_appendC() {
		// Test for method java.lang.StringBuffer
		// java.lang.StringBuffer.append(char)
		StringBuffer sb = new StringBuffer();
		char buf1 = 'H';
		char buf2 = 'W';
		sb.append(buf1);
		assertEquals("Buffer is invalid length after append", 1, sb.length());
		sb.append(buf2);
		assertEquals("Buffer is invalid length after append", 2, sb.length());
		assertTrue("Buffer contains invalid chars",
				(sb.toString().equals("HW")));
	}

	/**
	 * @tests java.lang.StringBuffer#append(double)
	 */
	public void test_appendD() {
		// Test for method java.lang.StringBuffer
		// java.lang.StringBuffer.append(double)
		StringBuffer sb = new StringBuffer();
		sb.append(Double.MAX_VALUE);
		assertEquals("Buffer is invalid length after append", 22, sb.length());
		assertEquals("Buffer contains invalid characters",
				"1.7976931348623157E308", sb.toString());
	}

	/**
	 * @tests java.lang.StringBuffer#append(float)
	 */
	public void test_appendF() {
		// Test for method java.lang.StringBuffer
		// java.lang.StringBuffer.append(float)
		StringBuffer sb = new StringBuffer();
		final float floatNum = 900.87654F;
		sb.append(floatNum);
		assertTrue("Buffer is invalid length after append: " + sb.length(), sb
				.length() == String.valueOf(floatNum).length());
		assertTrue("Buffer contains invalid characters", sb.toString().equals(
				String.valueOf(floatNum)));
	}

	/**
	 * @tests java.lang.StringBuffer#append(int)
	 */
	public void test_appendI() {
		// Test for method java.lang.StringBuffer
		// java.lang.StringBuffer.append(int)
		StringBuffer sb = new StringBuffer();
		sb.append(9000);
		assertEquals("Buffer is invalid length after append", 4, sb.length());
		sb.append(1000);
		assertEquals("Buffer is invalid length after append", 8, sb.length());
		assertEquals("Buffer contains invalid characters",
				"90001000", sb.toString());
	}

	/**
	 * @tests java.lang.StringBuffer#append(long)
	 */
	public void test_appendJ() {
		// Test for method java.lang.StringBuffer
		// java.lang.StringBuffer.append(long)

		StringBuffer sb = new StringBuffer();
		long t = 927654321098L;
		sb.append(t);
		assertEquals("Buffer is of invlaid length", 12, sb.length());
		assertEquals("Buffer contains invalid characters",
				"927654321098", sb.toString());
	}

	/**
	 * @tests java.lang.StringBuffer#append(java.lang.Object)
	 */
	public void test_appendLjava_lang_Object() {
		// Test for method java.lang.StringBuffer
		// java.lang.StringBuffer.append(java.lang.Object)
		StringBuffer sb = new StringBuffer();
		Object obj1 = new Object();
		Object obj2 = new Object();
		sb.append(obj1);
		sb.append(obj2);
		assertTrue("Buffer contains invalid characters", sb.toString().equals(
				obj1.toString() + obj2.toString()));
	}

	/**
	 * @tests java.lang.StringBuffer#append(java.lang.String)
	 */
	public void test_appendLjava_lang_String() {
		// Test for method java.lang.StringBuffer
		// java.lang.StringBuffer.append(java.lang.String)
		StringBuffer sb = new StringBuffer();
		String buf1 = "Hello";
		String buf2 = "World";
		sb.append(buf1);
		assertEquals("Buffer is invalid length after append", 5, sb.length());
		sb.append(buf2);
		assertEquals("Buffer is invalid length after append", 10, sb.length());
		assertTrue("Buffer contains invalid chars", (sb.toString()
				.equals("HelloWorld")));
	}

	/**
	 * @tests java.lang.StringBuffer#append(boolean)
	 */
	public void test_appendZ() {
		// Test for method java.lang.StringBuffer
		// java.lang.StringBuffer.append(boolean)
		StringBuffer sb = new StringBuffer();
		sb.append(false);
		assertEquals("Buffer is invalid length after append", 5, sb.length());
		sb.append(true);
		assertEquals("Buffer is invalid length after append", 9, sb.length());
		assertTrue("Buffer is invalid length after append", (sb.toString()
				.equals("falsetrue")));
	}

	/**
	 * @tests java.lang.StringBuffer#capacity()
	 */
	public void test_capacity() {
		// Test for method int java.lang.StringBuffer.capacity()
		StringBuffer sb = new StringBuffer(10);
		assertEquals("Returned incorrect capacity", 10, sb.capacity());
		sb.ensureCapacity(100);
		assertTrue("Returned incorrect capacity", sb.capacity() >= 100);
	}

	/**
	 * @tests java.lang.StringBuffer#charAt(int)
	 */
	public void test_charAtI() {
		// Test for method char java.lang.StringBuffer.charAt(int)
		assertEquals("Returned incorrect char", 's', testBuffer.charAt(3));

		// Test for StringIndexOutOfBoundsException
		boolean exception = false;
		try {
			testBuffer.charAt(-1);
		} catch (StringIndexOutOfBoundsException e) {
			exception = true;
		} catch (ArrayIndexOutOfBoundsException e) {
		}
		assertTrue("Should throw StringIndexOutOfBoundsException", exception);
	}

	/**
	 * @tests java.lang.StringBuffer#delete(int, int)
	 */
	public void test_deleteII() {
		// Test for method java.lang.StringBuffer
		// java.lang.StringBuffer.delete(int, int)
		testBuffer.delete(7, 7);
		assertEquals("Deleted chars when start == end", "This is a test buffer", testBuffer.toString()
				);
		testBuffer.delete(4, 14);
		assertEquals("Deleted incorrect chars",
				"This buffer", testBuffer.toString());

		testBuffer = new StringBuffer("This is a test buffer");
		String sharedStr = testBuffer.toString();
		testBuffer.delete(0, testBuffer.length());
		assertEquals("Didn't clone shared buffer", "This is a test buffer", sharedStr
				);
		assertTrue("Deleted incorrect chars", testBuffer.toString().equals(""));
		testBuffer.append("more stuff");
		assertEquals("Didn't clone shared buffer 2", "This is a test buffer", sharedStr
				);
		assertEquals("Wrong contents", "more stuff", testBuffer.toString());
		try {
			testBuffer.delete(-5, 2);
		} catch (IndexOutOfBoundsException e) {
		}
		assertEquals("Wrong contents 2",
				"more stuff", testBuffer.toString());
	}

	/**
	 * @tests java.lang.StringBuffer#deleteCharAt(int)
	 */
	public void test_deleteCharAtI() {
		// Test for method java.lang.StringBuffer
		// java.lang.StringBuffer.deleteCharAt(int)
		testBuffer.deleteCharAt(3);
		assertEquals("Deleted incorrect char",
				"Thi is a test buffer", testBuffer.toString());
	}

	/**
	 * @tests java.lang.StringBuffer#ensureCapacity(int)
	 */
	public void test_ensureCapacityI() {
		// Test for method void java.lang.StringBuffer.ensureCapacity(int)
		StringBuffer sb = new StringBuffer(10);

		sb.ensureCapacity(100);
		assertTrue("Failed to increase capacity", sb.capacity() >= 100);
	}

	/**
	 * @tests java.lang.StringBuffer#getChars(int, int, char[], int)
	 */
	public void test_getCharsII$CI() {
		// Test for method void java.lang.StringBuffer.getChars(int, int, char
		// [], int)

		char[] buf = new char[10];
		testBuffer.getChars(4, 8, buf, 2);
		assertTrue("Returned incorrect chars", new String(buf, 2, 4)
				.equals(testBuffer.toString().substring(4, 8)));

		boolean exception = false;
		try {
			StringBuffer buf2 = new StringBuffer("");
			buf2.getChars(0, 0, new char[5], 2);
		} catch (IndexOutOfBoundsException e) {
			exception = true;
		}
		assertTrue("did not expect IndexOutOfBoundsException", !exception);
	}

	/**
	 * @tests java.lang.StringBuffer#insert(int, char[])
	 */
	public void test_insertI$C() {
		// Test for method java.lang.StringBuffer
		// java.lang.StringBuffer.insert(int, char [])
		char buf[] = new char[4];
		"char".getChars(0, 4, buf, 0);
		testBuffer.insert(15, buf);
		assertEquals("Insert test failed",
				"This is a test charbuffer", testBuffer.toString());

		boolean exception = false;
		StringBuffer buf1 = new StringBuffer("abcd");
		try {
			buf1.insert(-1, (char[]) null);
		} catch (StringIndexOutOfBoundsException e) {
			exception = true;
		} catch (NullPointerException e) {
		}
		assertTrue("Should throw StringIndexOutOfBoundsException", exception);
	}

	/**
	 * @tests java.lang.StringBuffer#insert(int, char[], int, int)
	 */
	public void test_insertI$CII() {
		// Test for method java.lang.StringBuffer
		// java.lang.StringBuffer.insert(int, char [], int, int)
		char[] c = new char[] { 'n', 'o', 't', ' ' };
		testBuffer.insert(8, c, 0, 4);
		assertEquals("This is not a test buffer", testBuffer.toString());

		StringBuffer buf1 = new StringBuffer("abcd");
		try {
			buf1.insert(-1, (char[]) null, 0, 0);
			fail();
		} catch (NullPointerException expected) {
		} catch (StringIndexOutOfBoundsException expected) {
		}

        try {
            testBuffer.insert(testBuffer.length() - 1, c, -1, 1);
        } catch (StringIndexOutOfBoundsException e) {
            //expected
        }

	}

	/**
	 * @tests java.lang.StringBuffer#insert(int, char)
	 */
	public void test_insertIC() {
		// Test for method java.lang.StringBuffer
		// java.lang.StringBuffer.insert(int, char)
		testBuffer.insert(15, 'T');
		assertEquals("Insert test failed",
				"This is a test Tbuffer", testBuffer.toString());
	}

	/**
	 * @tests java.lang.StringBuffer#insert(int, double)
	 */
	public void test_insertID() {
		// Test for method java.lang.StringBuffer
		// java.lang.StringBuffer.insert(int, double)
		testBuffer.insert(15, Double.MAX_VALUE);
		assertTrue("Insert test failed", testBuffer.toString().equals(
				"This is a test " + Double.MAX_VALUE + "buffer"));
	}

	/**
	 * @tests java.lang.StringBuffer#insert(int, float)
	 */
	public void test_insertIF() {
		// Test for method java.lang.StringBuffer
		// java.lang.StringBuffer.insert(int, float)
		testBuffer.insert(15, Float.MAX_VALUE);
		String testBufferString = testBuffer.toString();
		String expectedResult = "This is a test "
				+ String.valueOf(Float.MAX_VALUE) + "buffer";
		assertTrue("Insert test failed, got: " + "\'" + testBufferString + "\'"
				+ " but wanted: " + "\'" + expectedResult + "\'",
				testBufferString.equals(expectedResult));
	}

	/**
	 * @tests java.lang.StringBuffer#insert(int, int)
	 */
	public void test_insertII() {
		// Test for method java.lang.StringBuffer
		// java.lang.StringBuffer.insert(int, int)
		testBuffer.insert(15, 100);
		assertEquals("Insert test failed",
				"This is a test 100buffer", testBuffer.toString());
	}

	/**
	 * @tests java.lang.StringBuffer#insert(int, long)
	 */
	public void test_insertIJ() {
		// Test for method java.lang.StringBuffer
		// java.lang.StringBuffer.insert(int, long)
		testBuffer.insert(15, 88888888888888888L);
		assertEquals("Insert test failed",
				"This is a test 88888888888888888buffer", testBuffer.toString());
	}

	/**
	 * @tests java.lang.StringBuffer#insert(int, java.lang.Object)
	 */
	public void test_insertILjava_lang_Object() {
		// Test for method java.lang.StringBuffer
		// java.lang.StringBuffer.insert(int, java.lang.Object)
		Object obj1 = new Object();
		testBuffer.insert(15, obj1);
		assertTrue("Insert test failed", testBuffer.toString().equals(
				"This is a test " + obj1.toString() + "buffer"));
	}

	/**
	 * @tests java.lang.StringBuffer#insert(int, java.lang.String)
	 */
	public void test_insertILjava_lang_String() {
		// Test for method java.lang.StringBuffer
		// java.lang.StringBuffer.insert(int, java.lang.String)

		testBuffer.insert(15, "STRING ");
		assertEquals("Insert test failed",
				"This is a test STRING buffer", testBuffer.toString());
	}

	/**
	 * @tests java.lang.StringBuffer#insert(int, boolean)
	 */
	public void test_insertIZ() {
		// Test for method java.lang.StringBuffer
		// java.lang.StringBuffer.insert(int, boolean)
		testBuffer.insert(15, true);
		assertEquals("Insert test failed",
				"This is a test truebuffer", testBuffer.toString());
	}

	/**
	 * @tests java.lang.StringBuffer#length()
	 */
	public void test_length() {
		// Test for method int java.lang.StringBuffer.length()
		assertEquals("Incorrect length returned", 21, testBuffer.length());
	}

	/**
	 * @tests java.lang.StringBuffer#replace(int, int, java.lang.String)
	 */
	public void test_replaceIILjava_lang_String() {
		// Test for method java.lang.StringBuffer
		// java.lang.StringBuffer.replace(int, int, java.lang.String)
		testBuffer.replace(5, 9, "is a replaced");
		assertTrue("Replace failed, wanted: " + "\'"
				+ "This is a replaced test buffer" + "\'" + " but got: " + "\'"
				+ testBuffer.toString() + "\'", testBuffer.toString().equals(
				"This is a replaced test buffer"));
		assertEquals("insert1", "text", new StringBuffer().replace(0, 0, "text")
				.toString());
		assertEquals("insert2", "123text", new StringBuffer("123").replace(3, 3, "text")
				.toString());
		assertEquals("insert2", "1text23", new StringBuffer("123").replace(1, 1, "text")
				.toString());
	}

	private String writeString(String in) {
		StringBuffer result = new StringBuffer();
		result.append("\"");
		for (int i = 0; i < in.length(); i++) {
			result.append(" 0x" + Integer.toHexString(in.charAt(i)));
		}
		result.append("\"");
		return result.toString();
	}

	private void reverseTest(String id, String org, String rev, String back) {
		// create non-shared StringBuffer
		StringBuffer sb = new StringBuffer(org);
		sb.reverse();
		String reversed = sb.toString();
		assertTrue("reversed surrogate " + id + ": " + writeString(reversed),
				reversed.equals(rev));
		// create non-shared StringBuffer
		sb = new StringBuffer(reversed);
		sb.reverse();
		reversed = sb.toString();
		assertTrue("reversed surrogate " + id + "a: " + writeString(reversed),
				reversed.equals(back));

		// test algorithm when StringBuffer is shared
		sb = new StringBuffer(org);
		String copy = sb.toString();
		assertEquals(org, copy);
		sb.reverse();
		reversed = sb.toString();
		assertTrue("reversed surrogate " + id + ": " + writeString(reversed),
				reversed.equals(rev));
		sb = new StringBuffer(reversed);
		copy = sb.toString();
		assertEquals(rev, copy);
		sb.reverse();
		reversed = sb.toString();
		assertTrue("reversed surrogate " + id + "a: " + writeString(reversed),
				reversed.equals(back));

	}

	/**
	 * @tests java.lang.StringBuffer#reverse()
	 */
	public void test_reverse() {
		// Test for method java.lang.StringBuffer
		// java.lang.StringBuffer.reverse()
		String org;
		org = "a";
		reverseTest("0", org, org, org);

		org = "ab";
		reverseTest("1", org, "ba", org);

		org = "abcdef";
		reverseTest("2", org, "fedcba", org);

		org = "abcdefg";
		reverseTest("3", org, "gfedcba", org);

	}

	/**
	 * @tests java.lang.StringBuffer#setCharAt(int, char)
	 */
	public void test_setCharAtIC() {
		// Test for method void java.lang.StringBuffer.setCharAt(int, char)
		StringBuffer s = new StringBuffer("HelloWorld");
		s.setCharAt(4, 'Z');
		assertEquals("Returned incorrect char", 'Z', s.charAt(4));
	}

	/**
	 * @tests java.lang.StringBuffer#setLength(int)
	 */
	public void test_setLengthI() {
		// Test for method void java.lang.StringBuffer.setLength(int)
		testBuffer.setLength(1000);
		assertEquals("Failed to increase length", 1000, testBuffer.length());
		assertTrue("Increase in length trashed buffer", testBuffer.toString()
				.startsWith("This is a test buffer"));
		testBuffer.setLength(2);
		assertEquals("Failed to decrease length", 2, testBuffer.length());
		assertEquals("Decrease in length failed",
				"Th", testBuffer.toString());
	}

	/**
	 * @tests java.lang.StringBuffer#substring(int)
	 */
	public void test_substringI() {
		// Test for method java.lang.String
		// java.lang.StringBuffer.substring(int)
		assertEquals("Returned incorrect substring", "is a test buffer", testBuffer.substring(5)
				);
	}

	/**
	 * @tests java.lang.StringBuffer#substring(int, int)
	 */
	public void test_substringII() {
		// Test for method java.lang.String
		// java.lang.StringBuffer.substring(int, int)
		assertEquals("Returned incorrect substring", "is", testBuffer.substring(5, 7)
				);
	}

	/**
	 * @tests java.lang.StringBuffer#toString()
	 */
	public void test_toString() {
		// Test for method java.lang.String java.lang.StringBuffer.toString()
		assertEquals("Incorrect string value returned", "This is a test buffer", testBuffer.toString()
				);
	}

	@Override
    protected void setUp() {
		testBuffer = new StringBuffer("This is a test buffer");
	}
}