nullity: initial tests

java/java-tests/testData/codeInsight/nullityinferrer/beforeParameterCheckedForNull.java

@@ -0,0 +1,34 @@
+import org.jetbrains.annotations.*;
+
+class Test {
+  void bar(String str) {
+    if (str == null) {
+      foo(str);
+    }
+  }
+
+  String foo(String str) {
+    return str;
+  }
+
+  String foo1(String str) {
+    if (str == null);
+    return (str);
+  }
+
+  String foo2(String str) {
+    if (str == null);
+    return ((String)str);
+  }
+
+  String fram(String str, boolean b) {
+    if (str != null) {
+      return b ? str : "not null strimg";
+    }
+    return "str was null";
+  }
+
+
+
+
+}