[#1880] Added tests

src/test/java/picocli/Issue1880.java

@@ -0,0 +1,60 @@
+package picocli;
+
+import static org.junit.Assert.*;
+import picocli.CommandLine;
+
+import org.junit.Test;
+
+public class Issue1880 {
+
+    @CommandLine.Command
+    static class TestCommand implements Runnable {
+
+        @CommandLine.Option(
+            names = {"--no-interactive"},
+           /* defaultValue = "true",*/
+            negatable = true
+        )
+        public boolean interactive = true;
+
+        public void run() {}
+    }
+
+    @Test
+    public void optionIsTrueByDefault() {
+        final CommandLine commandLine = new CommandLine(new TestCommand());
+        final CommandLine.ParseResult parseResult = commandLine.parseArgs();
+        final TestCommand command = (TestCommand) parseResult.commandSpec().userObject();
+        assertTrue(command.interactive);
+    }
+
+    @Test
+    public void optionFalseWhenSpecified() {
+        final TestCommand command = new TestCommand();
+        new CommandLine(command).parseArgs("--no-interactive");
+        assertFalse(command.interactive);
+    }
+
+    @Test
+    public void optionTrueWhenNegatedFormSpecified() {
+        final TestCommand command = new TestCommand();
+        new CommandLine(command).parseArgs("--interactive");
+        assertTrue(command.interactive);
+    }
+
+    @Test
+    public void optionCanBeSetToFalse() {
+        final TestCommand command = new TestCommand();
+        //CommandLine.tracer().setLevel(CommandLine.TraceLevel.DEBUG);
+        new CommandLine(command).parseArgs("--no-interactive=false");
+        assertFalse(command.interactive);
+    }
+
+    @Test
+    public void optionNegatedFormSetToFalseIsTrue() {
+        final TestCommand command = new TestCommand();
+        new CommandLine(command).parseArgs("--interactive=false");
+        assertTrue(command.interactive);
+    }
+
+}