adding ValidatingVisitor#passesTypeCheck()

This method handles the possible combinations of the Schema#requires* methods and the nullable flag

It is currently only used by ObjectSchema

Also removing unused ValidatingVisitor ctor.

Author: erosb

core/src/test/java/org/everit/json/schema/ValidatingVisitorTest.java

@@ -0,0 +1,71 @@
+package org.everit.json.schema;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.verifyZeroInteractions;
+
+import org.json.JSONObject;
+import org.junit.Before;
+import org.junit.Test;
+
+public class ValidatingVisitorTest {
+
+    private ValidationFailureReporter reporter;
+
+
+    @Before
+    public void before() {
+        reporter = mock(ValidationFailureReporter.class);
+    }
+
+    @Test
+    public void passesTypeCheck_otherType_noRequires() {
+        ValidatingVisitor subject = new ValidatingVisitor("string", reporter);
+        assertFalse(subject.passesTypeCheck(JSONObject.class, false, null));
+        verifyZeroInteractions(reporter);
+    }
+
+    @Test
+    public void passesTypeCheck_otherType_requires() {
+        ValidatingVisitor subject = new ValidatingVisitor("string", reporter);
+        assertFalse(subject.passesTypeCheck(JSONObject.class, true, null));
+        verify(reporter).failure(JSONObject.class, "string");
+    }
+
+    @Test
+    public void passesTypeCheck_otherType_nullPermitted_nullObject() {
+        ValidatingVisitor subject = new ValidatingVisitor(JSONObject.NULL, reporter);
+        assertFalse(subject.passesTypeCheck(JSONObject.class, true, Boolean.TRUE));
+        verifyZeroInteractions(reporter);
+    }
+
+    @Test
+    public void passesTypeCheck_otherType_nullPermitted_nullReference() {
+        ValidatingVisitor subject = new ValidatingVisitor(null, reporter);
+        assertFalse(subject.passesTypeCheck(JSONObject.class, true, Boolean.TRUE));
+        verifyZeroInteractions(reporter);
+    }
+
+    @Test
+    public void passesTypeCheck_nullPermitted_nonNullValue() {
+        ValidatingVisitor subject = new ValidatingVisitor("string", reporter);
+        assertFalse(subject.passesTypeCheck(JSONObject.class, true, Boolean.TRUE));
+        verify(reporter).failure(JSONObject.class, "string");
+    }
+
+    @Test
+    public void passesTypeCheck_requiresType_nullableIsNull() {
+        ValidatingVisitor subject = new ValidatingVisitor(null, reporter);
+        assertFalse(subject.passesTypeCheck(JSONObject.class, true, null));
+        verify(reporter).failure(JSONObject.class, null);
+    }
+
+    @Test
+    public void passesTypeCheck_sameType() {
+        ValidatingVisitor subject = new ValidatingVisitor("string", reporter);
+        assertTrue(subject.passesTypeCheck(String.class, true, Boolean.TRUE));
+        verifyZeroInteractions(reporter);
+    }
+}