From 089a8a01852467414314592ba342713e2b71ad6d Mon Sep 17 00:00:00 2001
From: Ivan Dubrov <idubrov@guidewire.com>
Date: Thu, 27 Aug 2015 13:42:12 -0700
Subject: Fixing issue when lambda method could not be found

closes #81
---
 .../com/github/dcevm/test/lambdas/LambdaTest.java  | 81 ++++++++++++++++++++--
 1 file changed, 77 insertions(+), 4 deletions(-)

(limited to 'dcevm/src')

diff --git a/dcevm/src/test/java8/com/github/dcevm/test/lambdas/LambdaTest.java b/dcevm/src/test/java8/com/github/dcevm/test/lambdas/LambdaTest.java
index efacdbbc..90134954 100644
--- a/dcevm/src/test/java8/com/github/dcevm/test/lambdas/LambdaTest.java
+++ b/dcevm/src/test/java8/com/github/dcevm/test/lambdas/LambdaTest.java
@@ -24,16 +24,15 @@
 
 package com.github.dcevm.test.lambdas;
 
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Ignore;
-import org.junit.Test;
+import org.junit.*;
 
 import java.util.concurrent.Callable;
+import java.util.function.Consumer;
 
 import static com.github.dcevm.test.util.HotSwapTestHelper.__toVersion__;
 import static com.github.dcevm.test.util.HotSwapTestHelper.__version__;
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
 
 /**
  * Tests for lambda expressions.
@@ -66,4 +65,78 @@ public class LambdaTest {
     assertEquals(30, (int) lambda.call());
     assertEquals(40, (int) lambda2.call());
   }
+
+  // version 0
+  public static class LambdaC2 {
+    public int i = 0;
+
+    public void doit() {
+      LambdaTest.methodWithLambdaParam(integer -> i += integer);
+    }
+  }
+
+  // version 1
+  public static class LambdaC2___1 {
+    int i = 0;
+
+    public void doit() {
+      LambdaTest.methodWithLambdaParam(integer -> i -= integer);
+    }
+  }
+
+  public static void methodWithLambdaParam(Consumer<Integer> consumer) {
+    consumer.accept(1);
+  }
+
+  @Test
+  public void testMethodLambda2() throws Exception {
+    assert __version__() == 0;
+
+    final LambdaC2 instance = new LambdaC2();
+    instance.doit();
+    Assert.assertEquals(1, instance.i);
+
+    __toVersion__(1);
+
+    instance.doit();
+    Assert.assertEquals(0, instance.i);
+  }
+
+  // version 0
+  public static class LambdaC3 {
+    public int i = 0;
+    public Consumer<Integer> l = x -> i += x;
+
+    public void doit() {
+      LambdaTest.methodWithLambdaParam(l);
+    }
+  }
+
+  // version 1
+  public static class LambdaC3___1 {
+    int i = 0;
+    public Consumer<Integer> l = null;
+
+    public void doit() {
+      LambdaTest.methodWithLambdaParam(l);
+    }
+  }
+
+  @Test
+  public void testMethodLambda3() throws Exception {
+    assert __version__() == 0;
+
+    final LambdaC3 instance = new LambdaC3();
+    instance.doit();
+    Assert.assertEquals(1, instance.i);
+
+    __toVersion__(1);
+
+    try {
+      instance.doit();
+      fail("Should get NoSuchMethodError as method implementing lambda should be gone in version 1");
+    } catch (NoSuchMethodError e) {
+      // Ok!
+    }
+  }
 }
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