#72: Joined throw the NoArgFoundException in case if source argument wasn't specified

dgroup · dgroup · commit ae33ebeebe2e · 2019-06-12T22:31:40.000+05:30
diff --git a/src/main/java/io/github/dgroup/term4j/arg/Joined.java b/src/main/java/io/github/dgroup/term4j/arg/Joined.java
@@ -50,6 +50,7 @@ public Joined(final Arg<? extends Collection<X>> args, final X... items) {
      * Ctor.
      * @param args All command-line arguments.
      * @param items The items to be merged into original value.
+     * @checkstyle AnonInnerLengthCheck (30 lines)
      */
     public Joined(final Arg<? extends Collection<X>> args, final Collection<X> items) {
         super(new Arg<Collection<X>>() {
@@ -60,7 +61,13 @@ public String label() {
 
             @Override
             public Collection<X> value() throws ArgNotFoundException {
-                return new org.cactoos.collection.Joined<>(args.value(), items);
+                final Collection<X> val;
+                if (this.specifiedByUser()) {
+                    val = new org.cactoos.collection.Joined<>(args.value(), items);
+                } else {
+                    val = items;
+                }
+                return val;
             }
 
             @Override
diff --git a/src/test/java/io/github/dgroup/term4j/arg/JoinedTest.java b/src/test/java/io/github/dgroup/term4j/arg/JoinedTest.java
@@ -63,4 +63,19 @@ public void value() {
             new ArgHave<>("Tom", "Mike", "Hank", "Bob", "Alex")
         ).affirm();
     }
+
+    @Test
+    public void absent() {
+        new Assertion<>(
+            "The source argument wasn't specified at all",
+            new Joined<>(
+                new Strings(
+                    "--users",
+                    new ListOf<>("--host", "host.com")
+                ),
+                "Bob", "Alex"
+            ),
+            new ArgHave<>("Bob", "Alex")
+        ).affirm();
+    }
 }
