Support testing against interfaces instead of implementations

- Fix not working cases

Author: Hélios GILLES

org.moreunit.plugin/src/org/moreunit/matching/CorrespondingTypeSearcher.java

@@ -86,6 +86,13 @@ private Collection<IType> findPotentialTargets(boolean withLikelyMatches) throws
         boolean qualifyWithPackage = ! withLikelyMatches;
         Set<String> patterns = new LinkedHashSet<>(nameEvaluation.getAllCorrespondingClassPatterns(qualifyWithPackage));
 
+        Set<IType> matches = SearchTools.searchFor(patterns, searchScope);
+
+        if(matches.size() == 1 && ! matches.iterator().next().isInterface())
+        {
+            return matches;
+        }
+
         if(type != null && ! nameEvaluation.isTestCase())
         {
             try
@@ -119,7 +126,7 @@ private Collection<IType> findPotentialTargets(boolean withLikelyMatches) throws
             }
         }
 
-        Set<IType> matches = SearchTools.searchFor(patterns, searchScope);
+        matches = SearchTools.searchFor(patterns, searchScope);
 
         if(nameEvaluation.isTestCase())
         {

org.moreunit.test/test/org/moreunit/matching/InterfaceCorrespondingTypeSearcherTest.java

@@ -5,6 +5,7 @@
 import java.util.Collection;
 
 import org.eclipse.jdt.core.IType;
+import org.eclipse.jdt.core.JavaModelException;
 import org.junit.Test;
 import org.moreunit.test.context.ContextTestCase;
 import org.moreunit.test.context.Preferences;
@@ -15,7 +16,7 @@ public class InterfaceCorrespondingTypeSearcherTest extends ContextTestCase
 {
     @Project(mainCls = "class Foo", testCls = "FooTest")
     @Test
-    public void getMatches_should_return_test_for_class() throws Exception
+    public void getMatches_should_return_test_for_class()
     {
         CorrespondingTypeSearcher searcher = new CorrespondingTypeSearcher(context.getCompilationUnit("Foo"), getPreferences());
         Collection<IType> matches = searcher.getMatches(false);
@@ -25,7 +26,7 @@ public void getMatches_should_return_test_for_class() throws Exception
 
     @Project(mainCls = "interface Foo", testCls = "FooTest")
     @Test
-    public void getMatches_should_return_test_for_interface() throws Exception
+    public void getMatches_should_return_test_for_interface()
     {
         context.getPrimaryTypeHandler("Foo").createSubclass("FooImpl");
 
@@ -37,7 +38,7 @@ public void getMatches_should_return_test_for_interface() throws Exception
 
     @Project(mainCls = "interface Foo", testCls = "FooTest")
     @Test
-    public void getMatches_should_return_implementation_for_interface_test_and_exclude_interface() throws Exception
+    public void getMatches_should_return_implementation_for_interface_test_and_exclude_interface()
     {
         context.getPrimaryTypeHandler("Foo").createSubclass("FooImpl");
 
@@ -50,7 +51,7 @@ public void getMatches_should_return_implementation_for_interface_test_and_exclu
 
     @Project(mainCls = "interface Foo", testCls = "FooTest")
     @Test
-    public void getMatches_should_return_interface_test_for_implementation() throws Exception
+    public void getMatches_should_return_interface_test_for_implementation()
     {
         context.getPrimaryTypeHandler("Foo").createSubclass("FooImpl");
 
@@ -62,7 +63,7 @@ public void getMatches_should_return_interface_test_for_implementation() throws
 
     @Project(mainCls = "interface Foo")
     @Test
-    public void getMatches_should_return_interface_for_implementation_test() throws Exception
+    public void getMatches_should_return_interface_for_implementation_test()
     {
         context.getPrimaryTypeHandler("Foo").createSubclass("FooImpl");
         context.getProjectHandler().getTestSrcFolderHandler().createClass("FooImplTest");
@@ -75,7 +76,7 @@ public void getMatches_should_return_interface_for_implementation_test() throws
 
     @Project(mainCls = "interface Foo", testCls = "FooTest")
     @Test
-    public void getMatches_should_include_interface_if_it_has_default_method() throws Exception
+    public void getMatches_should_include_interface_if_it_has_default_method() throws JavaModelException
     {
         IType foo = context.getPrimaryTypeHandler("Foo").get();
         foo.createMethod("default void bar() {}", null, true, null);