Test that CK rules don't fire in non-component files

Reviewed By: jvillard

Differential Revision: D3694101

fbshipit-source-id: 1c2913f

infer/tests/codetoanalyze/objcpp/componentkit/Test2.mm

@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2016 - present Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+#import <Foundation/Foundation.h>
+
+// This import alone shouldn't trigger lint rules, since its impl is not in
+// this translation unit.
+// Mimic importing CKComponnet
+@interface CKComponent : NSObject
+@end
+@implementation CKComponent
+@end
+
+// Mimic importing CKCompositeComponnet
+@interface CKCompositeComponent : NSObject
++ (instancetype)newWithComponent:(CKComponent*)component;
+@end
+@implementation CKCompositeComponent
++ (instancetype)newWithComponent:(CKComponent*)component {
+  return nil;
+}
+@end
+
+@interface SomeClass : NSObject
+@end
+@implementation SomeClass {
+  NSString* _foo;
+}
+
+- (instancetype)init {
+  if (self = [super init]) {
+    NSString* foo = @"HI"; // no error
+    _foo = foo;
+  }
+}
+@end

infer/tests/endtoend/objcpp/componentkit/MutableLocalVariableInNonComponentTest.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2016 - present Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+package endtoend.objcpp.componentkit;
+
+  import static org.hamcrest.MatcherAssert.assertThat;
+  import static utils.matchers.ResultContainsLineNumbers.containsLinesOfError;
+  import static org.hamcrest.core.IsNot.not;
+  import com.google.common.collect.ImmutableList;
+  import org.junit.BeforeClass;
+  import org.junit.ClassRule;
+  import org.junit.Test;
+  import java.io.IOException;
+  import utils.DebuggableTemporaryFolder;
+  import utils.InferException;
+  import utils.InferResults;
+  import utils.InferRunner;
+
+  public class MutableLocalVariableInNonComponentTest {
+
+    public static final String FILE =
+        "infer/tests/codetoanalyze/objcpp/componentkit/Test2.mm";
+    private static ImmutableList<String> inferCmd;
+    public static final String MUTABLE_LOCAL_VARIABLE_IN_COMPONENT_FILE =
+        "MUTABLE_LOCAL_VARIABLE_IN_COMPONENT_FILE";
+
+    @ClassRule
+    public static DebuggableTemporaryFolder folder = new DebuggableTemporaryFolder();
+
+    @BeforeClass
+    public static void runInfer() throws InterruptedException, IOException {
+      inferCmd = InferRunner.createObjCPPInferCommand(
+        folder,
+        FILE);
+    }
+    @Test
+    public void MLVsInComponentFile()
+        throws InterruptedException, IOException, InferException {
+      InferResults inferResults = InferRunner.runInferObjC(inferCmd);
+      assertThat(
+          "Results should not contain " + MUTABLE_LOCAL_VARIABLE_IN_COMPONENT_FILE,
+          inferResults,
+          not(containsLinesOfError(new int[]{38}, MUTABLE_LOCAL_VARIABLE_IN_COMPONENT_FILE)));
+    }
+}