[SPR-6025] PropertyPlaceholderUtils introduced

org.springframework.core/src/test/java/org/springframework/util/PropertyPlaceholderUtilsTests.java

@@ -0,0 +1,72 @@
+/*
+ * Copyright 2002-2009 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.
+ * 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.springframework.util;
+
+import java.util.Properties;
+
+import org.junit.Test;
+import static org.junit.Assert.assertEquals;
+
+/** @author Rob Harrop */
+public class PropertyPlaceholderUtilsTests {
+
+	@Test
+	public void testWithProperties() {
+		String text = "foo=${foo}";
+		Properties props = new Properties();
+		props.setProperty("foo", "bar");
+
+		assertEquals("foo=bar", PropertyPlaceholderUtils.replacePlaceholders(text, props));
+	}
+
+	@Test
+	public void testWithMultipleProperties() {
+		String text = "foo=${foo},bar=${bar}";
+		Properties props = new Properties();
+		props.setProperty("foo", "bar");
+		props.setProperty("bar", "baz");
+
+		assertEquals("foo=bar,bar=baz", PropertyPlaceholderUtils.replacePlaceholders(text, props));
+	}
+
+	@Test
+	public void testWithResolver() {
+		String text = "foo=${foo}";
+
+		assertEquals("foo=bar",
+				PropertyPlaceholderUtils.replacePlaceholders(text, new PropertyPlaceholderUtils.PlaceholderResolver() {
+
+					public String resolvePlaceholder(String placeholderName) {
+						if ("foo".equals(placeholderName)) {
+							return "bar";
+						}
+						else {
+							return null;
+						}
+					}
+				}));
+	}
+
+	@Test
+	public void testUnresolvedPlaceholderIsIgnored() {
+		String text = "foo=${foo},bar=${bar}";
+		Properties props = new Properties();
+		props.setProperty("foo", "bar");
+		
+		assertEquals("foo=bar,bar=${bar}", PropertyPlaceholderUtils.replacePlaceholders(text, props));
+	}
+}