1 files changed, 51 insertions, 0 deletions
diff --git a/javaparser-symbol-solver-testing/src/test/java/com/github/javaparser/symbolsolver/logic/FunctionInterfaceLogicTest.java b/javaparser-symbol-solver-testing/src/test/java/com/github/javaparser/symbolsolver/logic/FunctionInterfaceLogicTest.java
new file mode 100644
index 000000000..bda2cc900
--- /dev/null
+++ b/javaparser-symbol-solver-testing/src/test/java/com/github/javaparser/symbolsolver/logic/FunctionInterfaceLogicTest.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2016 Federico Tomassetti
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.github.javaparser.symbolsolver.logic;
+
+import com.github.javaparser.resolution.types.ResolvedType;
+import com.github.javaparser.symbolsolver.model.resolution.TypeSolver;
+import com.github.javaparser.symbolsolver.model.typesystem.ReferenceTypeImpl;
+import com.github.javaparser.symbolsolver.reflectionmodel.ReflectionClassDeclaration;
+import com.github.javaparser.symbolsolver.reflectionmodel.ReflectionInterfaceDeclaration;
+import com.github.javaparser.symbolsolver.resolution.typesolvers.ReflectionTypeSolver;
+import org.junit.Test;
+
+import java.util.function.Consumer;
+import java.util.function.Function;
+
+import static org.junit.Assert.assertEquals;
+
+public class FunctionInterfaceLogicTest {
+
+    @Test
+    public void testGetFunctionalMethodNegativeCaseOnClass() {
+        TypeSolver typeSolver = new ReflectionTypeSolver();
+        ResolvedType string = new ReferenceTypeImpl(new ReflectionClassDeclaration(String.class, typeSolver), typeSolver);
+        assertEquals(false, FunctionalInterfaceLogic.getFunctionalMethod(string).isPresent());
+    }
+
+    @Test
+    public void testGetFunctionalMethodPositiveCasesOnInterfaces() {
+        TypeSolver typeSolver = new ReflectionTypeSolver();
+        ResolvedType function = new ReferenceTypeImpl(new ReflectionInterfaceDeclaration(Function.class, typeSolver), typeSolver);
+        assertEquals(true, FunctionalInterfaceLogic.getFunctionalMethod(function).isPresent());
+        assertEquals("apply", FunctionalInterfaceLogic.getFunctionalMethod(function).get().getName());
+        ResolvedType consumer = new ReferenceTypeImpl(new ReflectionInterfaceDeclaration(Consumer.class, typeSolver), typeSolver);
+        assertEquals(true, FunctionalInterfaceLogic.getFunctionalMethod(consumer).isPresent());
+        assertEquals("accept", FunctionalInterfaceLogic.getFunctionalMethod(consumer).get().getName());
+    }
+}