Issue #3839: One new method to optimise design and detect empty LITERAL_CASE. Added corresponding UTs. Updated documentation

1 files changed, 36 insertions, 0 deletions

diff --git a/src/test/resources/com/puppycrawl/tools/checkstyle/checks/blocks/InputEmptyCase.java b/src/test/resources/com/puppycrawl/tools/checkstyle/checks/blocks/InputEmptyCase.java
new file mode 100644
index 000000000..b8c1df3f6
--- /dev/null
+++ b/src/test/resources/com/puppycrawl/tools/checkstyle/checks/blocks/InputEmptyCase.java
@@ -0,0 +1,36 @@
+////////////////////////////////////////////////////////////////////////////////
+// Input test file for testing empty LITERAL_CASE.
+// Created: 2017
+////////////////////////////////////////////////////////////////////////////////
+package com.puppycrawl.tools.checkstyle.checks.blocks;
+
+class InputEmptyCase
+{
+    void method1(int a) {
+        switch (a) {}
+        switch (a) {case 1: ; } // no violation
+        switch (a) {case 1:{}}  // 1 violation
+        switch (a) {
+            case 1:
+        }
+        switch (a) {
+            case 1: // 1 violation
+            {}
+        }
+        switch (a) {
+            case 1: // 1 violation if checking statements
+            {// none if checking text
+            }
+        }
+    }
+
+    public void method2(char c) {
+        switch(c) { case 0: } // no violation
+        switch(c) { case 0: {} method1(1); } // 1 violation
+        switch(c) { case 0: method1(0); {} } // no violation
+        switch(c) { case 0: case 1: {} } // 1 violation
+        switch(c) { case 0: {} case 1: {// 2 violations if checking statements
+        }
+        }
+    }
+}