2 files changed, 24 insertions, 1 deletions
diff --git a/sonar-css-plugin/src/main/java/org/sonar/css/plugin/rules/DeclarationBlockNoDuplicateProperties.java b/sonar-css-plugin/src/main/java/org/sonar/css/plugin/rules/DeclarationBlockNoDuplicateProperties.java
index 5c4b00a..474ee09 100644
--- a/sonar-css-plugin/src/main/java/org/sonar/css/plugin/rules/DeclarationBlockNoDuplicateProperties.java
+++ b/sonar-css-plugin/src/main/java/org/sonar/css/plugin/rules/DeclarationBlockNoDuplicateProperties.java
@@ -23,10 +23,19 @@ import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 import org.sonar.check.Rule;
+import org.sonar.check.RuleProperty;
 
 @Rule(key = "S4656")
 public class DeclarationBlockNoDuplicateProperties implements CssRule {
 
+  private static final boolean DEFAULT_IGNORE_FALLBACKS = true;
+
+  @RuleProperty(
+    key = "ignoreFallbacks",
+    description = "Ignore consecutive duplicated properties with different values.",
+    defaultValue = "" + DEFAULT_IGNORE_FALLBACKS)
+  boolean ignoreFallbacks = DEFAULT_IGNORE_FALLBACKS;
+
   @Override
   public String stylelintKey() {
     return "declaration-block-no-duplicate-properties";
@@ -34,7 +43,7 @@ public class DeclarationBlockNoDuplicateProperties implements CssRule {
 
   @Override
   public Object stylelintOptions() {
-    return Arrays.asList(true, new StylelintIgnoreOption());
+    return ignoreFallbacks ? Arrays.asList(true, new StylelintIgnoreOption()) : true;
   }
 
   private static class StylelintIgnoreOption {
diff --git a/sonar-css-plugin/src/test/java/org/sonar/css/plugin/rules/CssRuleTest.java b/sonar-css-plugin/src/test/java/org/sonar/css/plugin/rules/CssRuleTest.java
index 8b1e74c..cbd402d 100644
--- a/sonar-css-plugin/src/test/java/org/sonar/css/plugin/rules/CssRuleTest.java
+++ b/sonar-css-plugin/src/test/java/org/sonar/css/plugin/rules/CssRuleTest.java
@@ -50,4 +50,18 @@ public class CssRuleTest {
     String optionsAsJson = new Gson().toJson(instance.stylelintOptions());
     assertThat(optionsAsJson).isEqualTo("[true,{\"ignoreAtRules\":[\"foo\"]}]");
   }
+
+  @Test
+  public void declaration_block_no_duplicate_properties_default() {
+    String optionsAsJson = new Gson().toJson(new DeclarationBlockNoDuplicateProperties().stylelintOptions());
+    assertThat(optionsAsJson).isEqualTo("[true,{\"ignore\":[\"consecutive-duplicates-with-different-values\"]}]");
+  }
+
+  @Test
+  public void declaration_block_no_duplicate_properties_custom() {
+    DeclarationBlockNoDuplicateProperties instance = new DeclarationBlockNoDuplicateProperties();
+    instance.ignoreFallbacks = false;
+    String optionsAsJson = new Gson().toJson(instance.stylelintOptions());
+    assertThat(optionsAsJson).isEqualTo("true");
+  }
 }