[java] Add unit test for JavaTypeDefinitionSimple

pmd-java/src/test/java/net/sourceforge/pmd/typeresolution/typedefinition/JavaTypeDefinitionSimpleTest.java

@@ -0,0 +1,66 @@
+/**
+ * BSD-style license; for more info see http://pmd.sourceforge.net/license.html
+ */
+
+package net.sourceforge.pmd.typeresolution.typedefinition;
+
+import java.util.ArrayList;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import net.sourceforge.pmd.lang.java.typeresolution.typedefinition.JavaTypeDefinition;
+
+public class JavaTypeDefinitionSimpleTest {
+
+    /**
+     * Tests the raw type {@code ArrayList}.
+     */
+    @Test
+    public void arrayListWithoutBoundGenerics() {
+        JavaTypeDefinition typeDef = JavaTypeDefinition.forClass(ArrayList.class);
+        Assert.assertTrue(typeDef.isGeneric());
+        Assert.assertTrue(typeDef.isRawType());
+        Assert.assertEquals(1, typeDef.getTypeParameterCount());
+
+        JavaTypeDefinition genericType = typeDef.getGenericType(0);
+        Assert.assertFalse(genericType.isGeneric());
+        Assert.assertEquals(Object.class, genericType.getType());
+    }
+
+    /**
+     * Tests the type {@code ArrayList<String>}.
+     */
+    @Test
+    public void arrayListOfString() {
+        JavaTypeDefinition typeDef = JavaTypeDefinition.forClass(ArrayList.class, JavaTypeDefinition.forClass(String.class));
+        Assert.assertTrue(typeDef.isGeneric());
+        Assert.assertEquals(1, typeDef.getTypeParameterCount());
+        Assert.assertTrue(typeDef.isClassOrInterface());
+        Assert.assertFalse(typeDef.isArrayType());
+
+        JavaTypeDefinition genericType = typeDef.getGenericType(0);
+        Assert.assertFalse(genericType.isGeneric());
+        Assert.assertEquals(String.class, genericType.getType());
+
+        JavaTypeDefinition genericTypeByName = typeDef.getGenericType("E");
+        Assert.assertEquals(String.class, genericTypeByName.getType());
+    }
+
+    @Test
+    public void array() {
+        JavaTypeDefinition typeDef = JavaTypeDefinition.forClass(String[].class);
+        Assert.assertFalse(typeDef.isGeneric());
+        Assert.assertTrue(typeDef.isArrayType());
+        Assert.assertFalse(typeDef.isClassOrInterface());
+        Assert.assertEquals(String.class, typeDef.getElementType().getType());
+        Assert.assertFalse(typeDef.isPrimitive());
+    }
+
+    @Test
+    public void primitive() {
+        JavaTypeDefinition typeDef = JavaTypeDefinition.forClass(int.class);
+        Assert.assertTrue(typeDef.isPrimitive());
+        Assert.assertFalse(typeDef.isClassOrInterface());
+    }
+}