Improve Java examples

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1 files changed, 35 insertions, 0 deletions

diff --git a/base_workspace/examples/java-native/src/test/java/com/example/myproject/TestHello.java b/base_workspace/examples/java-native/src/test/java/com/example/myproject/TestHello.java
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index 0000000000..d50e6e503f
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+++ b/base_workspace/examples/java-native/src/test/java/com/example/myproject/TestHello.java
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+package com.example.myproject;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+import java.nio.charset.StandardCharsets;
+
+/**
+ * Tests different numbers of arguments to main().
+ *
+ * <p>With an empty args array, {@link Greeter} should print "Hello world". If there are one or more
+ * args, {@link Greeter} should print "Hello &lt;arg[0]&gt;".</p>
+ */
+public class TestHello {
+
+  @Test
+  public void testNoArgument() throws Exception {
+    ByteArrayOutputStream out = new ByteArrayOutputStream();
+    Greeter.out = new PrintStream(out);
+    Greeter.main();
+    assertEquals("Hello world\n", new String(out.toByteArray(), StandardCharsets.UTF_8));
+  }
+
+  @Test
+  public void testWithArgument() throws Exception {
+    ByteArrayOutputStream out = new ByteArrayOutputStream();
+    Greeter.out = new PrintStream(out);
+    Greeter.main("toto");
+    assertEquals("Hello toto\n", new String(out.toByteArray(), StandardCharsets.UTF_8));
+  }
+
+}