1 files changed, 65 insertions, 0 deletions
diff --git a/src/test/java/org/apache/commons/lang3/function/MethodInvokersBiFunctionTest.java b/src/test/java/org/apache/commons/lang3/function/MethodInvokersBiFunctionTest.java
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+++ b/src/test/java/org/apache/commons/lang3/function/MethodInvokersBiFunctionTest.java
@@ -0,0 +1,65 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 org.apache.commons.lang3.function;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import java.lang.reflect.Method;
+import java.util.function.BiFunction;
+
+import org.apache.commons.lang3.exception.CustomUncheckedException;
+import org.junit.jupiter.api.Test;
+
+/**
+ * Tests {@link MethodInvokers#asBiFunction(Method)}.
+ */
+public class MethodInvokersBiFunctionTest extends MethodFixtures {
+
+    @Test
+    public void testApply1Arg() throws NoSuchMethodException, SecurityException {
+        final BiFunction<MethodFixtures, String, String> func = MethodInvokers.asBiFunction(getMethodForGetString1Arg());
+        assertEquals(INSTANCE.getString1Arg("A"), func.apply(INSTANCE, "A"));
+    }
+
+    @Test
+    public void testApply1ArgThrowsUnchecked() throws NoSuchMethodException, SecurityException {
+        final BiFunction<MethodFixtures, String, String> func = MethodInvokers.asBiFunction(getMethodForGetString1ArgThrowsUnchecked());
+        assertThrows(CustomUncheckedException.class, () -> func.apply(INSTANCE, "A"));
+    }
+
+    @Test
+    public void testConstructorForNull() throws SecurityException {
+        assertThrows(NullPointerException.class, () -> MethodInvokers.asBiFunction(null));
+    }
+
+    @Test
+    public void testFullExample() throws SecurityException, ReflectiveOperationException {
+        final Method method = String.class.getMethod("charAt", int.class);
+        final BiFunction<String, Integer, Character> function = MethodInvokers.asBiFunction(method);
+        assertEquals('C', function.apply("ABC", 2));
+    }
+
+    @Test
+    public void testToString() throws SecurityException, ReflectiveOperationException {
+        // Should not blow up and must return _something_
+        assertFalse(MethodInvokers.asBiFunction(getMethodForGetString1Arg()).toString().isEmpty());
+    }
+
+}