(#194) Fix numbers decimal separator

src/functionalTest/java/org/scoverage/ScoverageFunctionalTest.java

@@ -11,8 +11,6 @@
 
 import java.io.File;
 import java.io.IOException;
-import java.text.NumberFormat;
-import java.text.ParseException;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -108,12 +106,12 @@ protected File resolve(File file, String relativePath) {
         return file.toPath().resolve(relativePath).toFile();
     }
 
-    private Double coverage(File reportDir, CoverageType coverageType) throws IOException, SAXException, ParseException {
+    private Double coverage(File reportDir, CoverageType coverageType) throws IOException, SAXException, NumberFormatException {
 
         File reportFile = reportDir.toPath().resolve(coverageType.getFileName()).toFile();
         Node xml = parser.parse(reportFile);
         Object attribute = xml.attribute(coverageType.getParamName());
-        double rawValue = NumberFormat.getInstance().parse(attribute.toString()).doubleValue();
+        double rawValue = Double.parseDouble(attribute.toString());
         return coverageType.normalize(rawValue) * 100.0;
     }
 

src/main/groovy/org/scoverage/CoverageChecker.groovy

@@ -6,7 +6,7 @@ import org.gradle.api.logging.Logger
 import org.gradle.internal.impldep.com.google.common.annotations.VisibleForTesting
 
 import java.text.DecimalFormat
-import java.text.NumberFormat
+import java.text.DecimalFormatSymbols
 
 /**
  * Handles different types of coverage Scoverage can measure.
@@ -56,38 +56,32 @@ class CoverageChecker {
     }
 
     public void checkLineCoverage(File reportDir, CoverageType coverageType, double minimumRate) throws GradleException {
-        NumberFormat defaultNf = NumberFormat.getInstance(Locale.getDefault())
-        checkLineCoverage(reportDir, coverageType, minimumRate, defaultNf)
-    }
-
-    public void checkLineCoverage(File reportDir, CoverageType coverageType, double minimumRate, NumberFormat nf) throws GradleException {
         logger.info("Checking coverage. Type: {}. Minimum rate: {}", coverageType, minimumRate)
 
         XmlParser parser = new XmlParser()
         parser.setFeature('http://apache.org/xml/features/disallow-doctype-decl', false)
         parser.setFeature('http://apache.org/xml/features/nonvalidating/load-external-dtd', false)
 
-        DecimalFormat df = new DecimalFormat("#.##")
-
         try {
             File reportFile = new File(reportDir, coverageType.fileName)
             Node xml = parser.parse(reportFile)
-            Double coverageValue = nf.parse(xml.attribute(coverageType.paramName) as String).doubleValue()
+            Double coverageValue = (xml.attribute(coverageType.paramName) as String).toDouble()
             Double overallRate = coverageType.normalize(coverageValue)
             def difference = (minimumRate - overallRate)
 
             if (difference > 1e-7) {
-                String is = df.format(overallRate * 100)
-                String needed = df.format(minimumRate * 100)
-                throw new GradleException(errorMsg(is, needed, coverageType))
+                throw new GradleException(errorMsg(overallRate, minimumRate, coverageType))
             }
         } catch (FileNotFoundException fnfe) {
             throw new GradleException(fileNotFoundErrorMsg(coverageType), fnfe)
         }
     }
 
     @VisibleForTesting
-    protected static String errorMsg(String actual, String expected, CoverageType type) {
+    protected static String errorMsg(double overallRate, double minimumRate, CoverageType type) {
+        DecimalFormat df = new DecimalFormat("#.##", DecimalFormatSymbols.getInstance(Locale.US))
+        String actual = df.format(overallRate * 100)
+        String expected = df.format(minimumRate * 100)
         "Only $actual% of project is covered by tests instead of $expected% (coverageType: $type)"
     }
 

src/test/groovy/org/scoverage/CoverageCheckerTest.groovy

@@ -10,15 +10,13 @@ import org.junit.rules.TemporaryFolder
 import org.slf4j.LoggerFactory
 
 import java.nio.file.Paths
-import java.text.NumberFormat
 
+import static org.junit.Assert.assertEquals
 import static org.junit.Assert.assertThat
 import static org.junit.jupiter.api.Assertions.assertThrows
 
 class CoverageCheckerTest {
 
-    private NumberFormat numberFormat = NumberFormat.getInstance(Locale.US)
-
     private File reportDir = Paths.get(getClass().getClassLoader().getResource("checkTask").toURI()).toFile()
 
     private CoverageChecker checker = new CoverageChecker(LoggerFactory.getLogger(CoverageCheckerTest.class))
@@ -31,68 +29,74 @@ class CoverageCheckerTest {
     @Test
     void failsWhenReportFileIsNotFound() {
         assertFailure(CoverageChecker.fileNotFoundErrorMsg(CoverageType.Line), {
-            checker.checkLineCoverage(tempDir.getRoot(), CoverageType.Line, 0.0, numberFormat)
+            checker.checkLineCoverage(tempDir.getRoot(), CoverageType.Line, 0.0)
         })
     }
 
     // line coverage
 
     @Test
     void failsWhenLineRateIsBelowTarget() {
-        assertFailure(CoverageChecker.errorMsg("66", "100", CoverageType.Line), {
-            checker.checkLineCoverage(reportDir, CoverageType.Line, 1.0, numberFormat)
+        assertFailure(CoverageChecker.errorMsg(0.66, 1.0, CoverageType.Line), {
+            checker.checkLineCoverage(reportDir, CoverageType.Line, 1.0)
         })
     }
 
     @Test
     void doesNotFailWhenLineRateIsAtTarget() {
-        checker.checkLineCoverage(reportDir, CoverageType.Line, 0.66, numberFormat)
+        checker.checkLineCoverage(reportDir, CoverageType.Line, 0.66)
     }
 
     @Test
     void doesNotFailWhenLineRateIsAboveTarget() {
-        checker.checkLineCoverage(reportDir, CoverageType.Line, 0.6, numberFormat)
+        checker.checkLineCoverage(reportDir, CoverageType.Line, 0.6)
     }
 
     // Statement coverage
 
     @Test
     void failsWhenStatementRateIsBelowTarget() {
-        assertFailure(CoverageChecker.errorMsg(numberFormat.format(new Double(33.33)), "100", CoverageType.Statement), {
-            checker.checkLineCoverage(reportDir, CoverageType.Statement, 1.0, numberFormat)
+        assertFailure(CoverageChecker.errorMsg(0.3333, 1.0, CoverageType.Statement), {
+            checker.checkLineCoverage(reportDir, CoverageType.Statement, 1.0)
         })
     }
 
     @Test
     void doesNotFailWhenStatementRateIsAtTarget() {
-        checker.checkLineCoverage(reportDir, CoverageType.Statement, 0.33, numberFormat)
+        checker.checkLineCoverage(reportDir, CoverageType.Statement, 0.33)
     }
 
     @Test
     void doesNotFailWhenStatementRateIsAboveTarget() {
-        checker.checkLineCoverage(reportDir, CoverageType.Statement, 0.3, numberFormat)
+        checker.checkLineCoverage(reportDir, CoverageType.Statement, 0.3)
     }
 
     // Branch coverage
 
     @Test
     void failsWhenBranchRateIsBelowTarget() {
-        assertFailure(CoverageChecker.errorMsg("50", "100", CoverageType.Branch), {
-            checker.checkLineCoverage(reportDir, CoverageType.Branch, 1.0, numberFormat)
+        assertFailure(CoverageChecker.errorMsg(0.5, 1.0, CoverageType.Branch), {
+            checker.checkLineCoverage(reportDir, CoverageType.Branch, 1.0)
         })
     }
 
     @Test
     void doesNotFailWhenBranchRateIsAtTarget() {
-        checker.checkLineCoverage(reportDir, CoverageType.Branch, 0.5, numberFormat)
+        checker.checkLineCoverage(reportDir, CoverageType.Branch, 0.5)
     }
 
     @Test
     void doesNotFailWhenBranchRateIsAboveTarget() {
-        checker.checkLineCoverage(reportDir, CoverageType.Branch, 0.45, numberFormat)
+        checker.checkLineCoverage(reportDir, CoverageType.Branch, 0.45)
+    }
+
+    @Test
+    void printsErrorMsgInEnglishWithUpTwoDecimalPointsPrecision() {
+        assertEquals("Only 54.32% of project is covered by tests instead of 90% (coverageType: Branch)",
+                CoverageChecker.errorMsg(0.54321, 0.9, CoverageType.Branch))
     }
 
-    private void assertFailure(String message, Executable executable) {
+    private static void assertFailure(String message, Executable executable) {
         GradleException e = assertThrows(GradleException.class, executable)
         assertThat(e, new CauseMatcher(message))
     }