#44 - Added infrastructure to prevent passwords from being printed to the console.

Introduced value objects to properly abstract command line arguments and introduced an interface Masked that allows masking a String value when printed to the console.

src/test/java/org/springframework/data/release/build/ArgumentUnitTest.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2017 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.data.release.build;
+
+import static org.hamcrest.CoreMatchers.*;
+import static org.junit.Assert.*;
+
+import org.junit.Test;
+import org.springframework.data.release.build.CommandLine.Argument;
+import org.springframework.data.release.model.Password;
+
+/**
+ * Unit tests for {@link Argument}.
+ * 
+ * @author Oliver Gierke
+ */
+public class ArgumentUnitTest {
+
+	@Test
+	public void masksMaskedForToString() {
+
+		Argument argument = Argument.of("password").withValue(Password.of("password"));
+
+		assertThat(argument.toCommandLineArgument(), is("password=password"));
+		assertThat(argument.toString(), startsWith("password=********"));
+	}
+
+	@Test
+	public void quotesValue() {
+
+		Argument argument = Argument.of("quoted").withQuotedValue("value");
+
+		assertThat(argument.toCommandLineArgument(), is("quoted=\"value\""));
+	}
+
+	@Test
+	public void argCreatesJvmArgument() {
+		assertThat(Argument.arg("foo").toCommandLineArgument(), is("-Dfoo"));
+	}
+
+	@Test
+	public void profileCreatesMavenProfile() {
+		assertThat(Argument.profile("foo").toCommandLineArgument(), is("-Pfoo"));
+		assertThat(Argument.profile("foo", "bar").toCommandLineArgument(), is("-Pfoo,bar"));
+	}
+}