Add sanity unit test for options classes that are subclasses of other options classes.

--
MOS_MIGRATED_REVID=120125572

1 files changed, 22 insertions, 0 deletions

diff --git a/src/test/java/com/google/devtools/common/options/OptionsParserTest.java b/src/test/java/com/google/devtools/common/options/OptionsParserTest.java
index 468139e056..96845a1ff6 100644
--- a/src/test/java/com/google/devtools/common/options/OptionsParserTest.java
+++ b/src/test/java/com/google/devtools/common/options/OptionsParserTest.java
@@ -86,6 +86,15 @@ public class OptionsParserTest {
     public String baz;
   }
 
+  /** Subclass of an options class. */
+  public static class ExampleBazSubclass extends ExampleBaz {
+
+    @Option(name = "baz_subclass",
+            category = "one",
+            defaultValue = "defaultBazSubclass")
+    public String bazSubclass;
+  }
+
   /**
    * Example with empty to null string converter
    */
@@ -146,6 +155,19 @@ public class OptionsParserTest {
   }
 
   @Test
+  public void parseWithOptionsInheritance() throws OptionsParsingException {
+    OptionsParser parser = newOptionsParser(ExampleBazSubclass.class);
+    parser.parse("--baz_subclass=cat", "--baz=dog");
+    ExampleBazSubclass subclassOptions = parser.getOptions(ExampleBazSubclass.class);
+    assertThat(subclassOptions.bazSubclass).isEqualTo("cat");
+    assertThat(subclassOptions.baz).isEqualTo("dog");
+    ExampleBaz options = parser.getOptions(ExampleBaz.class);
+    // This is a test showcasing the lack of functionality for retrieving parsed options at a
+    // superclass type class type. If there's a need for this functionality, we can add it later.
+    assertThat(options).isNull();
+  }
+
+  @Test
   public void parserWithUnknownOption() {
     OptionsParser parser = newOptionsParser(ExampleFoo.class, ExampleBaz.class);
     try {