Create StringBuilderWriterTest.java

Author: mercyblitz

microsphere-java-core/src/test/java/io/microsphere/io/StringBuilderWriterTest.java

@@ -0,0 +1,149 @@
+/*
+ * 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 io.microsphere.io;
+
+import io.microsphere.AbstractTestCase;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static io.microsphere.util.StringUtils.EMPTY_STRING;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+/**
+ * {@link StringBuilderWriter} Test
+ *
+ * @author <a href="mailto:mercyblitz@gmail.com">Mercy</a>
+ * @see StringBuilderWriter
+ * @since 1.0.0
+ */
+class StringBuilderWriterTest extends AbstractTestCase {
+
+    private StringBuilderWriter writer;
+
+    @BeforeEach
+    void setUp() {
+        this.writer = new StringBuilderWriter();
+    }
+
+    @Test
+    public void testConstructorWithCapacity() {
+        int size = random.nextInt(1024);
+        StringBuilderWriter writer = new StringBuilderWriter(size);
+        assertEquals(size, writer.getBuilder().capacity());
+    }
+
+    @Test
+    void testConstructorWithStringBuilder() {
+        StringBuilderWriter writer = new StringBuilderWriter(new StringBuilder("Hello"));
+        assertEquals("Hello", writer.toString());
+    }
+
+    @Test
+    void testWriteWithChar() {
+        writer.write('H');
+        assertEquals("H", writer.toString());
+    }
+
+    @Test
+    void testWriteWithChars() {
+        writer.write("Hello".toCharArray());
+        assertEquals("Hello", writer.toString());
+    }
+
+    @Test
+    void testWriteWithCharsOnEmpty() {
+        writer.write((char[]) null);
+        writer.write(new char[0]);
+    }
+
+    @Test
+    void testWriteWithCharsAndRange() {
+        writer.write("Hello".toCharArray(), 0, 2);
+        assertEquals("He", writer.toString());
+    }
+
+    @Test
+    void testWriteWithCharsAndRangeOnNull() {
+        writer.write((char[]) null, 0, 0);
+        writer.write(new char[0], 0, 0);
+    }
+
+    @Test
+    void testWriteWithString() {
+        writer.write("Hello");
+        assertEquals("Hello", writer.toString());
+    }
+
+    @Test
+    void testWriteWithStringOnEmpty() {
+        writer.write(TEST_NULL_STRING);
+        writer.write(EMPTY_STRING);
+    }
+
+    @Test
+    void testWriteWithStringAndRange() {
+        writer.write("Hello", 0, 2);
+        assertEquals("He", writer.toString());
+    }
+
+    @Test
+    void testWriteWithStringAndRangeOnEmpty() {
+        writer.write(TEST_NULL_STRING, 0, 0);
+        writer.write(EMPTY_STRING, 0, 0);
+    }
+
+    @Test
+    void testAppendWithChar() {
+        writer.append('H');
+        assertEquals("H", writer.toString());
+    }
+
+    @Test
+    void testAppendWithCharSequence() {
+        writer.append("Hello");
+        assertEquals("Hello", writer.toString());
+    }
+
+    @Test
+    void testAppendWithCharSequenceOnEmpty() {
+        writer.append(TEST_NULL_STRING);
+        writer.append(EMPTY_STRING);
+    }
+
+    @Test
+    void testAppendWithCharSequenceAndRange() {
+        writer.append("Hello", 0, 2);
+        assertEquals("He", writer.toString());
+    }
+
+    @Test
+    void testAppendWithCharSequenceAndRangeOnEmpty() {
+        writer.append(TEST_NULL_STRING, 0, 0);
+        writer.append(EMPTY_STRING, 0, 0);
+    }
+
+    @Test
+    void testClose() {
+        writer.close();
+    }
+
+    @Test
+    void testFlush() {
+        writer.flush();
+    }
+}