Add rule S5362: Expressions within "calc" should be valid (#180)

Removes S4650 from the default profile, because of overlap.

6 files changed, 76 insertions, 3 deletions

diff --git a/sonar-css-plugin/src/main/java/org/sonar/css/plugin/CssRules.java b/sonar-css-plugin/src/main/java/org/sonar/css/plugin/CssRules.java
index ec7a27c..a4a47b4 100644
--- a/sonar-css-plugin/src/main/java/org/sonar/css/plugin/CssRules.java
+++ b/sonar-css-plugin/src/main/java/org/sonar/css/plugin/CssRules.java
@@ -44,6 +44,7 @@ import org.sonar.css.plugin.rules.DeclarationBlockNoDuplicateProperties;
 import org.sonar.css.plugin.rules.DeclarationBlockNoShorthandPropertyOverrides;
 import org.sonar.css.plugin.rules.FontFamilyNoDuplicateNames;
 import org.sonar.css.plugin.rules.FontFamilyNoMissingGenericFamilyKeyword;
+import org.sonar.css.plugin.rules.FunctionCalcNoInvalid;
 import org.sonar.css.plugin.rules.FunctionCalcNoUnspacedOperator;
 import org.sonar.css.plugin.rules.FunctionLinearGradientNoNonstandardDirection;
 import org.sonar.css.plugin.rules.KeyframeDeclarationNoImportant;
@@ -88,6 +89,7 @@ public class CssRules {
       FontFamilyNoDuplicateNames.class,
       FontFamilyNoMissingGenericFamilyKeyword.class,
       FunctionCalcNoUnspacedOperator.class,
+      FunctionCalcNoInvalid.class,
       FunctionLinearGradientNoNonstandardDirection.class,
       KeyframeDeclarationNoImportant.class,
       MediaFeatureNameNoUnknown.class,
diff --git a/sonar-css-plugin/src/main/java/org/sonar/css/plugin/rules/FunctionCalcNoInvalid.java b/sonar-css-plugin/src/main/java/org/sonar/css/plugin/rules/FunctionCalcNoInvalid.java
new file mode 100644
index 0000000..e22a79c
--- /dev/null
+++ b/sonar-css-plugin/src/main/java/org/sonar/css/plugin/rules/FunctionCalcNoInvalid.java
@@ -0,0 +1,31 @@
+/*
+ * SonarCSS
+ * Copyright (C) 2018-2019 SonarSource SA
+ * mailto:info AT sonarsource DOT com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+package org.sonar.css.plugin.rules;
+
+import org.sonar.check.Rule;
+
+@Rule(key = "S5362")
+public class FunctionCalcNoInvalid implements CssRule {
+
+  @Override
+  public String stylelintKey() {
+    return "function-calc-no-invalid";
+  }
+}
diff --git a/sonar-css-plugin/src/main/resources/org/sonar/l10n/css/rules/css/S5362.html b/sonar-css-plugin/src/main/resources/org/sonar/l10n/css/rules/css/S5362.html
new file mode 100644
index 0000000..66fa5cd
--- /dev/null
+++ b/sonar-css-plugin/src/main/resources/org/sonar/l10n/css/rules/css/S5362.html
@@ -0,0 +1,24 @@
+<p>To perform calculations when specifying a CSS property <code>calc()</code> function can be used. This function takes single expression as
+parameter. When writing this expression some rules must be respected:</p>
+<ul>
+  <li> no empty <code>calc()</code> </li>
+  <li> there should be an operator between the arguments, spacing should be respected </li>
+  <li> there should not be any division by zero </li>
+  <li> the resolved type should be valid for where the expression is placed </li>
+</ul>
+<p>Otherwise <code>calc()</code> function will be invalid and the entire rule using it will be ignored.</p>
+<h2>Noncompliant Code Example</h2>
+<pre>
+.btn {
+  border: solid black 1px;
+  width: calc(100% 80px);  /* Noncompliant */
+}
+</pre>
+<h2>Compliant Solution</h2>
+<pre>
+.btn {
+  border: solid black 1px;
+  width: calc(100% - 80px);
+}
+</pre>
+
diff --git a/sonar-css-plugin/src/main/resources/org/sonar/l10n/css/rules/css/S5362.json b/sonar-css-plugin/src/main/resources/org/sonar/l10n/css/rules/css/S5362.json
new file mode 100644
index 0000000..bde6f63
--- /dev/null
+++ b/sonar-css-plugin/src/main/resources/org/sonar/l10n/css/rules/css/S5362.json
@@ -0,0 +1,16 @@
+{
+  "title": "Expressions within \"calc\" should be valid",
+  "type": "BUG",
+  "status": "ready",
+  "remediation": {
+    "func": "Constant\/Issue",
+    "constantCost": "5min"
+  },
+  "tags": [
+    
+  ],
+  "defaultSeverity": "Critical",
+  "ruleSpecification": "RSPEC-5362",
+  "sqKey": "S5362",
+  "scope": "All"
+}
diff --git a/sonar-css-plugin/src/main/resources/org/sonar/l10n/css/rules/css/Sonar_way_profile.json b/sonar-css-plugin/src/main/resources/org/sonar/l10n/css/rules/css/Sonar_way_profile.json
index 9b98de0..7834cba 100644
--- a/sonar-css-plugin/src/main/resources/org/sonar/l10n/css/rules/css/Sonar_way_profile.json
+++ b/sonar-css-plugin/src/main/resources/org/sonar/l10n/css/rules/css/Sonar_way_profile.json
@@ -6,7 +6,6 @@
     "S4647",
     "S4648",
     "S4649",
-    "S4650",
     "S4651",
     "S4652",
     "S4653",
@@ -23,6 +22,7 @@
     "S4666",
     "S4667",
     "S4668",
-    "S4670"
+    "S4670",
+    "S5362"
   ]
 }
diff --git a/sonar-css-plugin/src/test/java/org/sonar/css/plugin/SonarWayProfileTest.java b/sonar-css-plugin/src/test/java/org/sonar/css/plugin/SonarWayProfileTest.java
index d622b79..0717e95 100644
--- a/sonar-css-plugin/src/test/java/org/sonar/css/plugin/SonarWayProfileTest.java
+++ b/sonar-css-plugin/src/test/java/org/sonar/css/plugin/SonarWayProfileTest.java
@@ -38,7 +38,7 @@ public class SonarWayProfileTest {
     assertThat(profile.language()).isEqualTo(CssLanguage.KEY);
     assertThat(profile.name()).isEqualTo(SonarWayProfile.PROFILE_NAME);
     assertThat(profile.rules()).extracting("repoKey").containsOnly(CssRulesDefinition.REPOSITORY_KEY);
-    assertThat(profile.rules()).extracting("ruleKey").hasSize(CssRules.getRuleClasses().size() - 1);
+    assertThat(profile.rules()).extracting("ruleKey").hasSize(CssRules.getRuleClasses().size() - 2);
   }
 
 }