Support BreakConverter in ConvertSwitchToIfIntention

Fixes IDEA-141261 'Replace 'switch' with 'if'' intention produces incorrect code if some 'case' clause contains 'break' statement inside 'if'

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/convertSwitchToIf/afterBreakInIf.java

@@ -0,0 +1,15 @@
+// "Replace 'switch' with 'if'" "true"
+class X {
+  void m(String s, boolean r) {
+      if ("a".equals(s)) {
+          System.out.println("a");
+          if (r) {
+              return;
+          }
+
+          System.out.println("d");
+      } else {
+          System.out.println("d");
+      }
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/convertSwitchToIf/afterBreakInIf2.java

@@ -0,0 +1,14 @@
+// "Replace 'switch' with 'if'" "true"
+class X {
+  void m(String s, boolean r) {
+      if ("a".equals(s)) {
+          System.out.println("a");
+          if (r) {
+          } else {
+              throw new RuntimeException();
+          }
+      } else {
+          System.out.println("d");
+      }
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/convertSwitchToIf/afterBreakWithLabel.java

@@ -0,0 +1,23 @@
+// "Replace 'switch' with 'if'" "true"
+class X {
+  int m(String s, int x) {
+    if (x > 0) {
+      SWITCH:
+      if ("a".equals(s)) {
+          System.out.println("a");
+          for (int i = 0; i < 10; i++) {
+              System.out.println(i);
+              if (i == x) return 0;
+              if (i == x * 2) break;
+          }
+
+          System.out.println("d");
+      } else {
+          System.out.println("d");
+      }
+    } else {
+      return 1;
+    }
+    return 0;
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/convertSwitchToIf/afterString.java

@@ -2,15 +2,13 @@
 class X {
   public void doSomething( String value) {
       //comment1
-      //comment3
       //comment4
-      //comment5
       //comment6
-      //comment7
       //comment8
       if ("case1".equals(value)) {//comment2
-      } else if ("case2".equals(value)) {
-      } else {
+          //comment3
+      } else if ("case2".equals(value)) {//comment5
+      } else {//comment7
       }
   }
 }

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/convertSwitchToIf/beforeBreakInIf.java

@@ -0,0 +1,14 @@
+// "Replace 'switch' with 'if'" "true"
+class X {
+  void m(String s, boolean r) {
+    swi<caret>tch (s) {
+      case "a":
+        System.out.println("a");
+        if (r) {
+          break;
+        }
+      default:
+        System.out.println("d");
+    }
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/convertSwitchToIf/beforeBreakInIf2.java

@@ -0,0 +1,16 @@
+// "Replace 'switch' with 'if'" "true"
+class X {
+  void m(String s, boolean r) {
+    swi<caret>tch (s) {
+      case "a":
+        System.out.println("a");
+        if (r) {
+          break;
+        } else {
+          throw new RuntimeException();
+        }
+      default:
+        System.out.println("d");
+    }
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/convertSwitchToIf/beforeBreakInIfCannotConvert.java

@@ -0,0 +1,15 @@
+// "Replace 'switch' with 'if'" "false"
+class X {
+  void m(String s, boolean r) {
+    swi<caret>tch (s) {
+      case "a":
+        System.out.println("a");
+        if (r) {
+          break;
+        }
+      default:
+        System.out.println("d");
+    }
+    System.out.println("oops");
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/convertSwitchToIf/beforeBreakWithLabel.java

@@ -0,0 +1,22 @@
+// "Replace 'switch' with 'if'" "true"
+class X {
+  int m(String s, int x) {
+    if (x > 0) {
+      SWITCH:
+      swi<caret>tch (s){
+      case "a":
+        System.out.println("a");
+        for(int i=0; i<10; i++) {
+          System.out.println(i);
+          if(i == x) break SWITCH;
+          if(i == x*2) break;
+        }
+      default:
+        System.out.println("d");
+      }
+    } else {
+      return 1;
+    }
+    return 0;
+  }
+}