Issue #15340: created InputFormatted file for section 2.3.1 whitespac…

…e characters

config/checkstyle-resources-suppressions.xml

@@ -135,7 +135,7 @@
   <suppress checks="FileTabCharacter"
     files="src[\\/]test[\\/]resources[\\/]com[\\/]puppycrawl[\\/]tools[\\/]checkstyle[\\/]filters[\\/]suppresswithplaintextcommentfilter[\\/]Input.*"/>
   <suppress checks="FileTabCharacter"
-    files="[\\/]it[\\/]resources[\\/]com[\\/]google[\\/]checkstyle[\\/]test[\\/]chapter2filebasic[\\/]rule231filetab[\\/]InputWhitespaceCharacters\.java"/>
+    files="[\\/]it[\\/]resources[\\/]com[\\/]google[\\/]checkstyle[\\/]test[\\/]chapter2filebasic[\\/]rule231filetab[\\/]Input.*\.java"/>
   <suppress checks="FileTabCharacter"
     files="[\\/]InputRegressionJavaClass1\.java"/>
   <suppress checks="FileTabCharacter"

src/it/java/com/google/checkstyle/test/chapter2filebasic/rule231filetab/WhitespaceCharactersTest.java

@@ -35,4 +35,9 @@ public void testFileTab() throws Exception {
         verifyWithWholeConfig(getPath("InputWhitespaceCharacters.java"));
     }
 
+    @Test
+    public void testFileTabFormatted() throws Exception {
+        verifyWithWholeConfig(getPath("InputFormattedWhitespaceCharacters.java"));
+    }
+
 }

src/it/resources/com/google/checkstyle/test/chapter2filebasic/rule231filetab/InputFormattedWhitespaceCharacters.java

@@ -0,0 +1,39 @@
+package com.google.checkstyle.test.chapter2filebasic.rule231filetab;
+
+final class InputFormattedWhitespaceCharacters {
+  // Long line ----------------------------------------------------------------
+  // Contains a tab ->	<- // violation 'Line contains a tab character.'
+  // Contains trailing whitespace ->
+
+  /**
+   * Some javadoc.
+   *
+   * @param badFormat1 bad format
+   * @param badFormat2 bad format
+   * @param badFormat3 bad format
+   * @return hack
+   * @throws Exception abc
+   */
+  int test1(int badFormat1, int badFormat2, final int badFormat3) throws Exception {
+    return 0;
+  }
+
+  // A very, very long line that is OK because it matches the regexp "^.*is OK.*regexp.*$"
+  // long line that has a tab ->	<- and would be OK if tab counted as 1 char
+  // violation above 'Line contains a tab character.'
+
+  // tabs that count as one char because of their position ->	<-   ->	<-
+  // violation above 'Line contains a tab character.'
+
+  /** some lines to test the column after tabs. */
+  void violateColumnAfterTabs() {
+    // with tab-width 8 all statements below start at the same column,
+    // with different combinations of ' ' and '\t' before the statement
+    int tab0 = 1;
+    int tab1 = 1;
+    int tab2 = 1;
+    int tab3 = 1;
+    int tab4 = 1;
+    int tab5 = 1;
+  }
+}