added test cases

Author: krishnateja2314

clang/test/Refactor/SwitchToIf/basic.cpp

@@ -0,0 +1,22 @@
+// RUN: clang-refactor -action switch-to-if %s -- 2>&1 | FileCheck %s
+
+void foo(int x) {
+  switch (x) { // CHECK: Start refactoring here
+  case 1:
+    bar();
+    break;
+  case 2:
+    baz();
+    break;
+  default:
+    qux();
+  }
+}
+
+// CHECK: if (x == 1) {
+// CHECK-NEXT:     bar();
+// CHECK-NEXT: } else if (x == 2) {
+// CHECK-NEXT:     baz();
+// CHECK-NEXT: } else {
+// CHECK-NEXT:     qux();
+// CHECK-NEXT: }

clang/test/Refactor/SwitchToIf/fallthrough.cpp

@@ -0,0 +1,23 @@
+// RUN: clang-refactor -action switch-to-if %s -- 2>&1 | FileCheck %s
+
+void g(int v) {
+  switch (v) {
+  case 3:
+    alpha();
+    [[fallthrough]];
+  case 4:
+    beta();
+    break;
+  default:
+    gamma();
+  }
+}
+
+// CHECK: if (v == 3) {
+// CHECK-NEXT:     alpha();
+// CHECK-NEXT:     beta();
+// CHECK-NEXT: } else if (v == 4) {
+// CHECK-NEXT:     beta();
+// CHECK-NEXT: } else {
+// CHECK-NEXT:     gamma();
+// CHECK-NEXT: }

clang/test/Refactor/SwitchToIf/multi_case.cpp

@@ -0,0 +1,23 @@
+// RUN: clang-refactor -action switch-to-if %s -- 2>&1 | FileCheck %s
+
+void test(int n) {
+  switch (n) {
+  case 1:
+  case 2:
+    handleSmall();
+    break;
+  case 10:
+    handleLarge();
+    break;
+  default:
+    handleOther();
+  }
+}
+
+// CHECK: if (n == 1 || n == 2) {
+// CHECK-NEXT:     handleSmall();
+// CHECK-NEXT: } else if (n == 10) {
+// CHECK-NEXT:     handleLarge();
+// CHECK-NEXT: } else {
+// CHECK-NEXT:     handleOther();
+// CHECK-NEXT: }

clang/test/Refactor/SwitchToIf/no_default.cpp

@@ -0,0 +1,18 @@
+// RUN: clang-refactor -action switch-to-if %s -- 2>&1 | FileCheck %s
+
+void f(int k) {
+  switch (k) {
+  case 5:
+    ping();
+    break;
+  case 7:
+    pong();
+    break;
+  }
+}
+
+// CHECK: if (k == 5) {
+// CHECK-NEXT:     ping();
+// CHECK-NEXT: } else if (k == 7) {
+// CHECK-NEXT:     pong();
+// CHECK-NEXT: }