From 2ef1a4bffb905b02cfd8ea46d1d41216c973d472 Mon Sep 17 00:00:00 2001
From: peter <peter@jetbrains.com>
Date: Mon, 20 Mar 2017 13:22:45 +0100
Subject: [PATCH] a test for how dfa treats static final string comparison
 (IDEA-169892)

---
 .../dataFlow/fixture/InternedStringConstants.java      | 10 ++++++++++
 .../codeInspection/DataFlowInspectionTest.java         |  1 +
 2 files changed, 11 insertions(+)
 create mode 100644 java/java-tests/testData/inspection/dataFlow/fixture/InternedStringConstants.java

diff --git a/java/java-tests/testData/inspection/dataFlow/fixture/InternedStringConstants.java b/java/java-tests/testData/inspection/dataFlow/fixture/InternedStringConstants.java
new file mode 100644
index 000000000000..aa452db55ab2
--- /dev/null
+++ b/java/java-tests/testData/inspection/dataFlow/fixture/InternedStringConstants.java
@@ -0,0 +1,10 @@
+class Example {
+
+  public static final String FIRST = "f";
+  public static final String SECOND = "d";
+  public static final String THIRD = FIRST + SECOND;
+
+  public static void main(String[] args) {
+    System.out.println(THIRD == "fd");
+  }
+}
\ No newline at end of file
diff --git a/java/java-tests/testSrc/com/intellij/codeInspection/DataFlowInspectionTest.java b/java/java-tests/testSrc/com/intellij/codeInspection/DataFlowInspectionTest.java
index 59c7d90faf7f..fd790365d43c 100644
--- a/java/java-tests/testSrc/com/intellij/codeInspection/DataFlowInspectionTest.java
+++ b/java/java-tests/testSrc/com/intellij/codeInspection/DataFlowInspectionTest.java
@@ -95,6 +95,7 @@ public class DataFlowInspectionTest extends DataFlowInspectionTestCase {
   public void testCheckEnumConstantConstructor() { doTest(); }
   public void testCompareToEnumConstant() throws Throwable { doTest(); }
   public void testEqualsConstant() throws Throwable { doTest(); }
+  public void testInternedStringConstants() throws Throwable { doTest(); }
   public void testDontSaveTypeValue() { doTest(); }
   public void testFinalLoopVariableInstanceof() throws Throwable { doTest(); }
   public void testGreaterIsNotEquals() throws Throwable { doTest(); }