fix formula types and add tarantula

src/main/java/fr/spoonlabs/flacoco/localization/spectrum/SpectrumFormula.java

@@ -2,10 +2,12 @@
 
 import fr.spoonlabs.flacoco.localization.spectrum.formulas.Formula;
 import fr.spoonlabs.flacoco.localization.spectrum.formulas.OchiaiFormula;
+import fr.spoonlabs.flacoco.localization.spectrum.formulas.TarantulaFormula;
 
 public enum SpectrumFormula {
 
-	OCHIAI(new OchiaiFormula());
+	OCHIAI(new OchiaiFormula()),
+	TARANTULA(new TarantulaFormula());
 
 	private final Formula formula;
 

src/main/java/fr/spoonlabs/flacoco/localization/spectrum/formulas/Formula.java

@@ -1,23 +1,8 @@
-/**
- * Copyright (C) 2019 GZoltar contributors.
- * 
- * This file is part of GZoltar.
- * 
- * GZoltar 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.
- * 
- * GZoltar 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 GZoltar. If
- * not, see <https://www.gnu.org/licenses/>.
- */
 package fr.spoonlabs.flacoco.localization.spectrum.formulas;
 
 public interface Formula {
 
-	public double compute(int nPassingNotExecuting, int nFailingNotExecuting, int nPassingExecuting,
-			int nFailingExecuting);
+	public double compute(double nPassingNotExecuting, double nFailingNotExecuting, double nPassingExecuting,
+			double nFailingExecuting);
+
 }

src/main/java/fr/spoonlabs/flacoco/localization/spectrum/formulas/OchiaiFormula.java

@@ -5,8 +5,8 @@ public class OchiaiFormula implements Formula {
 	public OchiaiFormula() {
 	}
 
-	public double compute(int nPassingNotExecuting, int nFailingNotExecuting, int nPassingExecuting,
-			int nFailingExecuting) {
+	public double compute(double nPassingNotExecuting, double nFailingNotExecuting, double nPassingExecuting,
+			double nFailingExecuting) {
 
 		if ((nFailingExecuting + nPassingExecuting == 0) || (nFailingExecuting + nFailingNotExecuting == 0)) {
 			return 0;

src/main/java/fr/spoonlabs/flacoco/localization/spectrum/formulas/TarantulaFormula.java

@@ -0,0 +1,20 @@
+package fr.spoonlabs.flacoco.localization.spectrum.formulas;
+
+public class TarantulaFormula implements Formula {
+
+	public TarantulaFormula() {
+	}
+
+	public double compute(double nPassingNotExecuting, double nFailingNotExecuting, double nPassingExecuting,
+			double nFailingExecuting) {
+		double passingTerm = nPassingNotExecuting + nPassingExecuting == 0 ? 0 : nPassingExecuting / (nPassingNotExecuting + nPassingExecuting);
+		double failingTerm = nFailingNotExecuting + nFailingExecuting == 0 ? 0 : nFailingExecuting / (nFailingNotExecuting + nFailingExecuting);
+
+		if (passingTerm + failingTerm == 0) {
+			return 0;
+		}
+
+		return failingTerm / (passingTerm + failingTerm);
+	}
+
+}

src/test/java/fr/spoonlabs/flacoco/api/FlacocoTest.java

@@ -91,6 +91,62 @@ public void testExampleFL1SpectrumBasedOchiaiDefaultMode() {
 		assertOrdered(susp, locations);
 	}
 
+	@Test
+	public void testExampleFL1SpectrumBasedTarantulaDefaultMode() {
+		// Run only on target release >= 5
+		Assume.assumeTrue(getCompilerVersion() >= 5);
+
+		// Setup config
+		FlacocoConfig config = getDefaultFlacocoConfig();
+		config.setProjectPath(new File("./examples/exampleFL1/FLtest1").getAbsolutePath());
+		config.setSpectrumFormula(SpectrumFormula.TARANTULA);
+
+		// Run Flacoco
+		Flacoco flacoco = new Flacoco(config);
+
+		// Run default mode
+		FlacocoResult result = flacoco.run();
+
+		for (Map.Entry<Location, Suspiciousness> entry : result.getDefaultSuspiciousnessMap().entrySet()) {
+			System.out.println(entry);
+		}
+
+		// Check executed tests
+		assertEquals(4, result.getExecutedTests().size());
+		assertTrue(result.getExecutedTests().containsAll(Arrays.asList(
+				new StringTestMethod("fr.spoonlabs.FLtest1.CalculatorTest", "testMul"),
+				new StringTestMethod("fr.spoonlabs.FLtest1.CalculatorTest", "testDiv"),
+				new StringTestMethod("fr.spoonlabs.FLtest1.CalculatorTest", "testSubs"),
+				new StringTestMethod("fr.spoonlabs.FLtest1.CalculatorTest", "testSum")
+		)));
+
+		// Check failing tests
+		assertEquals(1, result.getFailingTests().size());
+		assertTrue(result.getFailingTests().contains(new StringTestMethod("fr.spoonlabs.FLtest1.CalculatorTest", "testMul")));
+
+		// Check ignored tests weren't executed
+		assertFalse(result.getExecutedTests().contains(new StringTestMethod("fr.spoonlabs.FLtest1.CalculatorTest", "testIgnore")));
+
+		Map<Location, Suspiciousness> susp = result.getDefaultSuspiciousnessMap();
+		assertEquals(6, susp.size());
+
+		// Line executed only by the failing
+		assertEquals(1.0, susp.get(new Location("fr.spoonlabs.FLtest1.Calculator", 15)).getScore(), 0);
+
+		// Line executed by a mix of failing and passing
+		assertEquals(0.75, susp.get(new Location("fr.spoonlabs.FLtest1.Calculator", 14)).getScore(), 0.01);
+		assertEquals(0.6, susp.get(new Location("fr.spoonlabs.FLtest1.Calculator", 12)).getScore(), 0.01);
+
+		// Lines executed by all test
+		assertEquals(0.5, susp.get(new Location("fr.spoonlabs.FLtest1.Calculator", 10)).getScore(), 0);
+		assertEquals(0.5, susp.get(new Location("fr.spoonlabs.FLtest1.Calculator", 5)).getScore(), 0);
+		assertEquals(0.5, susp.get(new Location("fr.spoonlabs.FLtest1.Calculator", 6)).getScore(), 0);
+
+		List<Location> locations = result.getSuspiciousLocationList();
+		assertEquals(6, locations.size());
+		assertOrdered(susp, locations);
+	}
+
 	@Test
 	public void testExampleFL1SpectrumBasedOchiaiDefaultModeThreshold() {
 		// Run only on target release >= 5

src/test/java/fr/spoonlabs/flacoco/api/Math70Test.java

@@ -44,7 +44,7 @@ public void setUp() {
     }
 
     @Test
-    public void testMath70() {
+    public void testMath70Ochiai() {
         // Setup config
         FlacocoConfig config = new FlacocoConfig();
         config.setProjectPath(new File("./examples/math_70").getAbsolutePath());
@@ -80,6 +80,44 @@ public void testMath70() {
         assertEquals(0.5, susp.get(new Location("org.apache.commons.math.analysis.solvers.BisectionSolver", 87)).getScore(), 0);
     }
 
+    @Test
+    public void testMath70Tarantula() {
+        // Setup config
+        FlacocoConfig config = new FlacocoConfig();
+        config.setProjectPath(new File("./examples/math_70").getAbsolutePath());
+        config.setWorkspace(workspaceDir.getRoot().getAbsolutePath());
+        config.setFamily(FlacocoConfig.FaultLocalizationFamily.SPECTRUM_BASED);
+        config.setSpectrumFormula(SpectrumFormula.TARANTULA);
+        config.setThreshold(0.5);
+
+        // Run Flacoco
+        Flacoco flacoco = new Flacoco(config);
+
+        // Run default mode
+        FlacocoResult result = flacoco.run();
+
+        for (Map.Entry<Location, Suspiciousness> entry : result.getDefaultSuspiciousnessMap().entrySet()) {
+            System.out.println(entry);
+        }
+
+        // TODO: Flacoco is only able of executing 2178 tests
+        //assertEquals(2181, result.getExecutedTests().size());
+        assertEquals(1, result.getFailingTests().size());
+
+        Map<Location, Suspiciousness> susp = result.getDefaultSuspiciousnessMap();
+        assertEquals(30, susp.size());
+
+        assertEquals(1.0, susp.get(new Location("org.apache.commons.math.analysis.solvers.BisectionSolver", 72)).getScore(), 0);
+        assertEquals(0.99, susp.get(new Location("org.apache.commons.math.analysis.solvers.BisectionSolver", 66)).getScore(), 0.01);
+        assertEquals(0.99, susp.get(new Location("org.apache.commons.math.analysis.solvers.BisectionSolver", 81)).getScore(), 0.01);
+        assertEquals(0.99, susp.get(new Location("org.apache.commons.math.analysis.solvers.BisectionSolver", 80)).getScore(), 0.01);
+        assertEquals(0.99, susp.get(new Location("org.apache.commons.math.analysis.solvers.BisectionSolver", 89)).getScore(), 0.01);
+        assertEquals(0.99, susp.get(new Location("org.apache.commons.math.analysis.solvers.BisectionSolver", 88)).getScore(), 0.01);
+        assertEquals(0.99, susp.get(new Location("org.apache.commons.math.analysis.solvers.BisectionSolver", 87)).getScore(), 0.01);
+        assertEquals(0.99, susp.get(new Location("org.apache.commons.math.analysis.solvers.BisectionSolver", 87)).getScore(), 0.01);
+    }
+
+
 
     @Test
     public void testMath70TestDetection() {