Add lazy loading tests

Author: smowton

regression/cbmc-java/lazyloading1/A.class

@@ -0,0 +1,8 @@
+CORE
+test.class
+--lazy-methods --verbosity 10 --function test.main
+^EXIT=0$
+^SIGNAL=0$
+elaborate java::A\.f:\(\)V
+--
+elaborate java::B\.g:\(\)V

regression/cbmc-java/lazyloading1/B.class

@@ -0,0 +1,21 @@
+// The most basic lazy loading test: A::f is directly called, B::g should be unreachable
+
+public class test
+{
+  A a;
+  B b;
+  public static void main()
+  {
+    A.f();
+  }
+}
+
+class A
+{
+  public static void f() {}
+}
+
+class B
+{
+  public static void g() {}
+}

regression/cbmc-java/lazyloading1/test.class

@@ -0,0 +1,8 @@
+CORE
+test.class
+--lazy-methods --verbosity 10 --function test.main
+^EXIT=0$
+^SIGNAL=0$
+elaborate java::A\.f:\(\)V
+--
+elaborate java::B\.g:\(\)V

regression/cbmc-java/lazyloading1/test.desc

@@ -0,0 +1,23 @@
+// This test checks that because A is instantiated in main and B is not,
+// A::f is reachable and B::g is not
+
+public class test
+{
+  A a;
+  B b;
+  public static void main()
+  {
+    A a = new A();
+    a.f();
+  }
+}
+
+class A
+{
+  public void f() {}
+}
+
+class B
+{
+  public void g() {}
+}

regression/cbmc-java/lazyloading1/test.java

@@ -0,0 +1,8 @@
+CORE
+test.class
+--lazy-methods --verbosity 10 --function test.main
+^EXIT=0$
+^SIGNAL=0$
+elaborate java::A\.f:\(\)V
+--
+elaborate java::B\.g:\(\)V

regression/cbmc-java/lazyloading2/A.class

@@ -0,0 +1,30 @@
+// This test checks that because `main` has a parameter of type C, which has a field of type A,
+// A::f is considered reachable, but B::g is not.
+
+public class test
+{
+  public static void main(C c)
+  {
+    c.a.f();
+  }
+}
+
+class A
+{
+  public void f() {}
+}
+
+class B
+{
+  public void g() {}
+}
+
+class C
+{
+  A a;
+}
+
+class D
+{
+  B b;
+}