Simplifying since Locale.getDefault() is used by default

src/main/groovy/org/scoverage/OverallCheckTask.groovy

@@ -46,7 +46,11 @@ class OverallCheckTask extends DefaultTask {
     /** Set if want to change default from 'reportDir' in scoverage extension. */
     File reportDir
 
+    /** Overwrite to test for a specific locale. */
+    Locale locale
+
     protected XmlParser parser
+
     protected DecimalFormat df = new DecimalFormat("#.##")
 
     OverallCheckTask() {
@@ -73,7 +77,7 @@ class OverallCheckTask extends DefaultTask {
 
         try {
             Node xml = parser.parse(reportFile)
-            NumberFormat nf = NumberFormat.getInstance(Locale.getDefault());
+            NumberFormat nf = NumberFormat.getInstance(locale == null ? Locale.getDefault() : locale);
             Double coverageValue = nf.parse(xml.attribute(coverageType.paramName) as String).doubleValue();
             Double overallRate = coverageType.normalize(coverageValue)
             def difference = (minimumRate - overallRate)

src/test/groovy/org/scoverage/AcceptanceTestUtils.groovy

@@ -41,7 +41,7 @@ class AcceptanceTestUtils {
         File reportFile = new File(reportDir, coverageType.fileName)
         def xml = parser.parse(reportFile)
         println("reportfile path: ${reportFile.absolutePath}")
-        NumberFormat nf = NumberFormat.getInstance(Locale.getDefault());
+        NumberFormat nf = NumberFormat.getInstance();
         nf.parse(xml.attribute(coverageType.paramName) as String).doubleValue();
     }
 }

src/test/groovy/org/scoverage/OverallCheckTaskTest.groovy

@@ -13,6 +13,9 @@ import org.junit.Rule
 import org.junit.Test
 import org.junit.rules.ExpectedException
 
+import javax.swing.text.NumberFormatter
+import java.text.NumberFormat
+
 /**
  * Copied from the Internet, just to check if we have correct exception thrown.
  */
@@ -41,17 +44,6 @@ class CauseMatcher extends TypeSafeMatcher<Throwable> {
 }
 
 class OverallCheckTaskTest {
-    private static Locale defaultLocale
-    @BeforeClass
-    public static void setup() {
-        defaultLocale = Locale.getDefault()
-        Locale.setDefault(Locale.US)
-    }
-
-    @AfterClass
-    public static void tearDown() {
-        Locale.setDefault(defaultLocale)
-    }
 
     @Rule
     public ExpectedException expectedException = ExpectedException.none()
@@ -60,6 +52,7 @@ class OverallCheckTaskTest {
         Project project = ProjectBuilder.builder().build()
         project.plugins.apply(ScoveragePlugin)
         project.tasks.create('bob', OverallCheckTask) {
+            locale = Locale.US
             minimumRate = coverageRate
             reportDir = new File('src/test/resources')
             coverageType = type
@@ -74,6 +67,7 @@ class OverallCheckTaskTest {
         Project project = ProjectBuilder.builder().build()
         project.plugins.apply(ScoveragePlugin)
         project.tasks.create('bob', OverallCheckTask) {
+            locale = Locale.US
             minimumRate = 1.0
             reportDir = new File('src/test/nothingthere')
             coverageType = CoverageType.Line
@@ -114,9 +108,10 @@ class OverallCheckTaskTest {
     @Test
     void failsWhenStatementRateIsBelowTarget() {
         Project project = projectForRate(1, CoverageType.Statement)
+        NumberFormat nf = NumberFormat.getInstance()
         expectedException.expectCause(new CauseMatcher(
                 GradleException.class,
-                OverallCheckTask.errorMsg("33.33", "100", CoverageType.Statement)
+                OverallCheckTask.errorMsg(nf.format(new Double(33.33)), "100", CoverageType.Statement)
         ))
         project.tasks.bob.execute()
     }