Add test for issue google#22

src/test/java/com/google/simplecfg/NullableDereferenceTest.java

@@ -142,4 +142,11 @@ public class NullableDereferenceTest {
         "testdata/NullableDereferenceIssue13.javax:33:7: "
         + "Dereferencing obj, which was declared @Nullable.");
   }
+
+  @Test public void issue22() {
+    Collection<String> findings = StmtCfgTest.findings("NullableDereferenceIssue22");
+    assertThat(findings).containsExactly(
+        "testdata/NullableDereferenceIssue22.javax:25:12: "
+        + "Dereferencing obj, which was declared @Nullable.");
+  }
 }

testdata/NullableDereferenceIssue22.javax

@@ -0,0 +1,33 @@
+/**
+ * Copyright 2015 Google Inc. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import javax.annotation.Nullable;
+
+/**
+ * This is test data, not real source code!
+ * Test for GitHub issue #13 (https://github.com/google/simplecfg/issues/13).
+ */
+public class NullableDereferenceIssue22 {
+  public int test(@Nullable Object obj) {
+    ensure(obj != null);
+    return obj.hashCode(); // False positive finding generated here.
+  }
+
+  private void ensure(boolean condition) throws Error {
+    if (!condition) {
+      throw new Error("Condition was false");
+    }
+  }
+}