add test for #964

src/test/java/picocli/SynopsisOrderTest.java

@@ -0,0 +1,45 @@
+package picocli;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.contrib.java.lang.system.ProvideSystemProperty;
+import org.junit.contrib.java.lang.system.SystemErrRule;
+import picocli.CommandLine.ArgGroup;
+import picocli.CommandLine.Command;
+import picocli.CommandLine.Help;
+
+import static java.lang.String.format;
+import static org.junit.Assert.assertEquals;
+import static picocli.TestUtil.usageString;
+
+public class SynopsisOrderTest {
+	@Rule
+	public final ProvideSystemProperty ansiOFF = new ProvideSystemProperty("picocli.ansi", "false");
+	@Rule
+	public final SystemErrRule systemErrRule = new SystemErrRule().enableLog().muteForSuccessfulTests();
+
+	@Command()
+	class SynopsisOrder {
+		class Group {
+			@CommandLine.Option(names = "--option1", required = true)
+			String value1;
+		}
+
+		class AllGroups {
+			@CommandLine.ArgGroup(exclusive = false, multiplicity = "1", order = 1) Group group;
+			@CommandLine.Option(names = "--option2", required = true, order = 2) String value2;
+		}
+
+		@ArgGroup(exclusive = true, multiplicity = "1")
+		AllGroups allGroups;
+	}
+
+	@Test
+	public void testSynopsisOrderForArgGroup() {
+		String result = usageString(new SynopsisOrder(), Help.Ansi.OFF);
+		assertEquals(format("" +
+				"Usage: <main class> (--option1=<value1> | (--option2=<value2>))%n" +
+				"      --option1=<value1>%n" +
+				"      --option2=<value2>%n"), result);
+	}
+}