Added HostDependentDownloadableContributionTest

app/test/cc/arduino/packages/contributions/HostDependentDownloadableContributionStub.java

@@ -0,0 +1,28 @@
+package cc.arduino.packages.contributions;
+
+public class HostDependentDownloadableContributionStub extends HostDependentDownloadableContribution {
+  @Override
+  public String getHost() {
+    return null;
+  }
+
+  @Override
+  public String getUrl() {
+    return null;
+  }
+
+  @Override
+  public String getChecksum() {
+    return null;
+  }
+
+  @Override
+  public long getSize() {
+    return 0;
+  }
+
+  @Override
+  public String getArchiveFileName() {
+    return null;
+  }
+}

app/test/cc/arduino/packages/contributions/HostDependentDownloadableContributionTest.java

@@ -0,0 +1,52 @@
+package cc.arduino.packages.contributions;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+public class HostDependentDownloadableContributionTest {
+
+  @Test
+  public void macOsXPositiveTest() {
+    HostDependentDownloadableContributionStub contribution = new HostDependentDownloadableContributionStub() {
+      @Override
+      public String getHost() {
+        return "x86_64-apple-darwin";
+      }
+    };
+    System.setProperty("os.name", "Mac OS X");
+    System.setProperty("os.arch", "x86_64");
+
+    assertTrue(contribution.isCompatible());
+  }
+
+  @Test
+  public void macOsXNegativeTest() {
+    HostDependentDownloadableContributionStub contribution = new HostDependentDownloadableContributionStub() {
+      @Override
+      public String getHost() {
+        return "x86_64-apple-darwin";
+      }
+    };
+    System.setProperty("os.name", "Linux");
+    System.setProperty("os.arch", "amd64");
+
+    assertFalse(contribution.isCompatible());
+  }
+
+  @Test
+  public void macOsXNegativeTest2() {
+    HostDependentDownloadableContributionStub contribution = new HostDependentDownloadableContributionStub() {
+      @Override
+      public String getHost() {
+        return "x86_64-apple-darwin";
+      }
+    };
+    System.setProperty("os.name", "Mac OS X");
+    System.setProperty("os.arch", "i686");
+
+    assertFalse(contribution.isCompatible());
+  }
+
+}