Dataflow: perform ranges addition (part of IDEA-184800)

java/java-tests/testData/inspection/dataFlow/fixture/LongRangeAdd.java

@@ -0,0 +1,42 @@
+import java.util.*;
+
+public class LongRangeAdd {
+  void test(int x, int y) {
+    if (x > 0 && x < 10) {
+      if (<warning descr="Condition 'y > x + 10 && y < 0' is always 'false'">y > x + 10 &&
+           <warning descr="Condition 'y < 0' is always 'false' when reached">y < 0</warning></warning>){
+        System.out.println("Impossible");
+      }
+    }
+  }
+
+  void testLoop() {
+    for (int i = 0; i < 10; i = i + 1) {
+      if (<warning descr="Condition 'i + 1 == 15' is always 'false'">i + 1 == 15</warning>) {
+        System.out.println("Impossible");
+      }
+      if (<warning descr="Condition 'i + 1 == -10' is always 'false'">i + 1 == -10</warning>) {
+        System.out.println("Impossible");
+      }
+      System.out.println(i);
+    }
+  }
+
+  void testNestedLoop() {
+    for (int i = 0; i < 10; i = i + 1) {
+      for (int j = 0; j < 10; j = j + 1) {
+        if (i + j == 0) {
+          if (<warning descr="Condition 'i != 0' is always 'false'">i != 0</warning>) {
+            System.out.println("never");
+          }
+          if (<warning descr="Condition 'j != 0' is always 'false'">j != 0</warning>) {
+            System.out.println("never");
+          }
+        }
+        if (<warning descr="Condition 'i + j == 20' is always 'false'">i + j == 20</warning>) {
+          System.out.println("never");
+        }
+      }
+    }
+  }
+}