Provides error location for ArithmeticException. (#11877)

Change-Id: Ieb63ad556c3dc01196f0b9898aed9670923c9138

3 files changed, 34 insertions, 5 deletions

diff --git a/theme-compiler/src/com/vaadin/sass/internal/expression/ArithmeticExpressionEvaluator.java b/theme-compiler/src/com/vaadin/sass/internal/expression/ArithmeticExpressionEvaluator.java
index 7dbd8ae1a0..552b464941 100644
--- a/theme-compiler/src/com/vaadin/sass/internal/expression/ArithmeticExpressionEvaluator.java
+++ b/theme-compiler/src/com/vaadin/sass/internal/expression/ArithmeticExpressionEvaluator.java
@@ -99,7 +99,8 @@ public class ArithmeticExpressionEvaluator {
                         continue inputTermLoop;
                     }
                 }
-                throw new ArithmeticException();
+                throw new ArithmeticException("Illegal arithmetic expression",
+                        term);
             }
             if (current.getLexicalUnitType() == SCSSLexicalUnit.SCSS_OPERATOR_LEFT_PAREN) {
                 operators.push(Parentheses.LEFT);
@@ -115,7 +116,7 @@ public class ArithmeticExpressionEvaluator {
         while (!operators.isEmpty()) {
             Object operator = operators.pop();
             if (operator == Parentheses.LEFT) {
-                throw new ArithmeticException("Unexpected \"(\" found");
+                throw new ArithmeticException("Unexpected \"(\" found", term);
             }
             createNewOperand((BinaryOperator) operator, operands);
         }
@@ -123,7 +124,7 @@ public class ArithmeticExpressionEvaluator {
         if (!operands.isEmpty()) {
             LexicalUnitImpl operand = (LexicalUnitImpl) operands.peek();
             throw new ArithmeticException("Unexpected operand "
-                    + operand.toString() + " found");
+                    + operand.toString() + " found", term);
         }
         return expression;
     }
diff --git a/theme-compiler/src/com/vaadin/sass/internal/expression/exception/ArithmeticException.java b/theme-compiler/src/com/vaadin/sass/internal/expression/exception/ArithmeticException.java
index 13b6f0e936..f9ab90fc32 100644
--- a/theme-compiler/src/com/vaadin/sass/internal/expression/exception/ArithmeticException.java
+++ b/theme-compiler/src/com/vaadin/sass/internal/expression/exception/ArithmeticException.java
@@ -15,12 +15,28 @@
  */
 package com.vaadin.sass.internal.expression.exception;
 
+import com.vaadin.sass.internal.parser.LexicalUnitImpl;
+
 public class ArithmeticException extends RuntimeException {
     public ArithmeticException(String errorMsg) {
         super(errorMsg);
     }
 
-    public ArithmeticException() {
-        super("Illegal arithmetic expression");
+    public ArithmeticException(String error, LexicalUnitImpl term) {
+        super(buildMessage(error, term));
+    }
+
+    private static String buildMessage(String message, LexicalUnitImpl term) {
+        StringBuilder builder = new StringBuilder(message);
+
+        builder.append(": \"");
+        builder.append(term.toString());
+        builder.append("\" [");
+        builder.append(term.getLineNumber());
+        builder.append(",");
+        builder.append(term.getColumnNumber());
+        builder.append("]");
+
+        return builder.toString();
     }
 }
diff --git a/theme-compiler/tests/src/com/vaadin/sass/internal/expression/ArithmeticExpressionEvaluatorTest.java b/theme-compiler/tests/src/com/vaadin/sass/internal/expression/ArithmeticExpressionEvaluatorTest.java
index 8978eb812e..c408255d0e 100644
--- a/theme-compiler/tests/src/com/vaadin/sass/internal/expression/ArithmeticExpressionEvaluatorTest.java
+++ b/theme-compiler/tests/src/com/vaadin/sass/internal/expression/ArithmeticExpressionEvaluatorTest.java
@@ -19,6 +19,7 @@ import org.junit.Assert;
 import org.junit.Test;
 import org.w3c.css.sac.LexicalUnit;
 
+import com.vaadin.sass.internal.expression.exception.ArithmeticException;
 import com.vaadin.sass.internal.expression.exception.IncompatibleUnitsException;
 import com.vaadin.sass.internal.parser.LexicalUnitImpl;
 
@@ -122,4 +123,15 @@ public class ArithmeticExpressionEvaluatorTest {
         Assert.assertEquals(LexicalUnit.SAC_CENTIMETER,
                 result.getLexicalUnitType());
     }
+
+    @Test(expected = ArithmeticException.class)
+    public void testNonExistingSignal() {
+        LexicalUnitImpl operand2Integer = LexicalUnitImpl.createInteger(2, 3,
+                null, 2);
+        LexicalUnitImpl operatorComma = LexicalUnitImpl.createComma(2, 3,
+                operand2Integer);
+        LexicalUnitImpl operand3Integer = LexicalUnitImpl.createInteger(2, 3,
+                operatorComma, 3);
+        LexicalUnitImpl result = evaluator.evaluate(operand2Integer);
+    }
 }