avoid scientific notation when converting floats back to strings

Author: rbri

src/main/java/com/gargoylesoftware/css/parser/LexicalUnitImpl.java

@@ -15,6 +15,9 @@
 package com.gargoylesoftware.css.parser;
 
 import java.io.Serializable;
+import java.text.DecimalFormat;
+import java.text.DecimalFormatSymbols;
+import java.util.Locale;
 
 /**
  * Implementation of {@link LexicalUnit}.
@@ -688,7 +691,11 @@ private String getTrimedFloatValue() {
         if (f - i == 0) {
             return Integer.toString((int) f);
         }
-        return Float.toString(f);
+
+        final DecimalFormat decimalFormat = new DecimalFormat("0", DecimalFormatSymbols.getInstance(Locale.ENGLISH));
+        decimalFormat.setGroupingUsed(false);
+        decimalFormat.setMaximumFractionDigits(4);
+        return decimalFormat.format(f);
     }
 
     /**

src/test/java/com/gargoylesoftware/css/parser/LexicalUnitImplTest.java

@@ -386,8 +386,30 @@ public void createNumberFromFloatPecision() throws Exception {
         Assert.assertNull(unit.getNextLexicalUnit());
         Assert.assertNull(unit.getPreviousLexicalUnit());
 
-        Assert.assertEquals("1.2345676", unit.toString());
-        Assert.assertEquals("REAL(1.2345676)", ((LexicalUnitImpl) unit).toDebugString());
+        Assert.assertEquals("1.2346", unit.toString());
+        Assert.assertEquals("REAL(1.2346)", ((LexicalUnitImpl) unit).toDebugString());
+    }
+
+    /**
+     * @throws Exception if any error occurs
+     */
+    @Test
+    public void createNumberFromFloatPecisionWithoutExponent() throws Exception {
+        final LexicalUnit unit = LexicalUnitImpl.createNumber(null, 0.0001f);
+
+        Assert.assertEquals(LexicalUnitType.REAL, unit.getLexicalUnitType());
+        Assert.assertEquals(0.0001f, unit.getFloatValue(), 0.0001f);
+        Assert.assertEquals(0, unit.getIntegerValue());
+        Assert.assertEquals("", unit.getDimensionUnitText());
+        Assert.assertNull(unit.getFunctionName());
+        Assert.assertNull(unit.getParameters());
+        Assert.assertNull(unit.getStringValue());
+
+        Assert.assertNull(unit.getNextLexicalUnit());
+        Assert.assertNull(unit.getPreviousLexicalUnit());
+
+        Assert.assertEquals("0.0001", unit.toString());
+        Assert.assertEquals("REAL(0.0001)", ((LexicalUnitImpl) unit).toDebugString());
     }
 
     /**