1 files changed, 274 insertions, 0 deletions
diff --git a/common-parameters/src/test/java/org/onap/policy/common/parameters/TestFieldValidator.java b/common-parameters/src/test/java/org/onap/policy/common/parameters/TestFieldValidator.java
new file mode 100644
index 00000000..e4432c8d
--- /dev/null
+++ b/common-parameters/src/test/java/org/onap/policy/common/parameters/TestFieldValidator.java
@@ -0,0 +1,274 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2021 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.common.parameters;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
+import lombok.Getter;
+import org.junit.Before;
+import org.junit.Test;
+import org.onap.policy.common.parameters.annotations.Min;
+import org.onap.policy.common.parameters.annotations.NotNull;
+
+public class TestFieldValidator extends ValidatorUtil {
+    private static final String UNANNOTATED_FIELD = "unannotated";
+    private static final String INT_FIELD = "intValue";
+    private static final int VALID_INT = 10;
+    private static final int INVALID_INT = -10;
+
+    @Getter
+    private int unannotated;
+
+    @Min(0)
+    @Getter
+    private int intValue;
+
+    @NotNull
+    @Getter
+    private boolean boolValue;
+
+    @NotNull
+    @Getter
+    private String notNullValue;
+
+    @Min(0)
+    @Getter
+    private static int staticField;
+
+    /**
+     * Has no accessor.
+     */
+    @Min(0)
+    private int noMethod;
+
+    /**
+     * Accessor is {@link #getStaticMethod()}, which is static.
+     */
+    @Min(0)
+    private int staticMethod;
+
+    /**
+     * Accessor is {@link #getVoidMethod()}, which returns a void.
+     */
+    @Min(0)
+    private int voidMethod;
+
+    /**
+     * Accessor is {@link #getParameterizedMethod()}, which requires a parameter.
+     */
+    @Min(0)
+    private int parameterizedMethod;
+
+    /**
+     * Accessor is {@link #getExMethod()}, which throws an exception.
+     */
+    @Min(0)
+    private int exMethod;
+
+
+    @Before
+    public void setUp() {
+        bean = new BeanValidator();
+    }
+
+    @Test
+    public void testGetAnnotation() {
+        // field-level annotation
+        assertThat(new FieldValidator(bean, TestFieldValidator.class, getField(INT_FIELD)).isEmpty()).isFalse();
+
+        // class-level annotation
+        assertThat(new FieldValidator(bean, ClassAnnot.class, getField(ClassAnnot.class, "text")).isEmpty()).isFalse();
+    }
+
+    @Test
+    public void testFieldValidator() throws NoSuchFieldException, SecurityException {
+        /*
+         * Note: nested classes contain fields like "$this", thus the check for "$" in the
+         * variable name is already covered by the other tests.
+         */
+
+        /*
+         * Class with no annotations.
+         */
+        @NotNull
+        class NoAnnotations {
+            @SuppressWarnings("unused")
+            String strValue;
+        }
+
+        Field field = NoAnnotations.class.getDeclaredField("this$0");
+
+        assertThat(new FieldValidator(bean, NoAnnotations.class, field).isEmpty()).isTrue();
+
+        // unannotated
+        assertThat(new FieldValidator(bean, TestFieldValidator.class, getField("unannotated")).isEmpty()).isTrue();
+
+        // these are invalid for various reasons
+
+        Field staticField2 = getField("staticField");
+        assertThatThrownBy(() -> new FieldValidator(bean, TestFieldValidator.class, staticField2))
+                        .isInstanceOf(IllegalArgumentException.class);
+
+        Field noMethodField = getField("noMethod");
+        assertThatThrownBy(() -> new FieldValidator(bean, TestFieldValidator.class, noMethodField))
+                        .isInstanceOf(IllegalArgumentException.class);
+
+        // annotated
+        assertThat(new FieldValidator(bean, TestFieldValidator.class, getField(INT_FIELD)).isEmpty()).isFalse();
+    }
+
+    @Test
+    public void testFieldValidator_SetNullAllowed() {
+        // default - null is allowed
+        assertThat(new FieldValidator(bean, TestFieldValidator.class, getField(INT_FIELD)).isNullAllowed()).isTrue();
+
+        // field-level NotNull
+        assertThat(new FieldValidator(bean, TestFieldValidator.class, getField("notNullValue")).isNullAllowed())
+                        .isFalse();
+
+        // class-level NotNull
+        assertThat(new FieldValidator(bean, ClassAnnot.class, getField(ClassAnnot.class, "noMethod")).isNullAllowed())
+                        .isFalse();
+    }
+
+    @Test
+    public void testValidateField_testGetValue() {
+        // unannotated
+        BeanValidationResult result = new BeanValidationResult(MY_NAME, this);
+        new FieldValidator(bean, getClass(), getField(UNANNOTATED_FIELD)).validateField(result, this);
+        assertThat(result.getResult()).isNull();
+
+        // valid
+        intValue = VALID_INT;
+        result = new BeanValidationResult(MY_NAME, this);
+        new FieldValidator(bean, getClass(), getField(INT_FIELD)).validateField(result, this);
+        assertThat(result.getResult()).isNull();
+
+        // invalid
+        intValue = INVALID_INT;
+        result = new BeanValidationResult(MY_NAME, this);
+        new FieldValidator(bean, getClass(), getField(INT_FIELD)).validateField(result, this);
+        assertThat(result.getResult()).contains(INT_FIELD);
+
+        // throws an exception
+        FieldValidator validator = new FieldValidator(bean, TestFieldValidator.class, getField("exMethod"));
+        BeanValidationResult result2 = new BeanValidationResult(MY_NAME, this);
+        assertThatThrownBy(() -> validator.validateField(result2, this)).isInstanceOf(IllegalArgumentException.class)
+                        .getCause().isInstanceOf(InvocationTargetException.class).getCause()
+                        .hasMessage("expected exception");
+    }
+
+    @Test
+    public void testClassOnly() {
+        // class-level annotation has no bearing on a static field
+        assertThat(new FieldValidator(bean, ClassAnnot.class, getField(ClassAnnot.class, "staticValue")).isEmpty())
+                        .isTrue();
+
+        // field-level annotation on a static field
+        Field staticField2 = getField("staticField");
+        assertThatThrownBy(() -> new FieldValidator(bean, TestFieldValidator.class, staticField2))
+                        .isInstanceOf(IllegalArgumentException.class);
+    }
+
+    @Test
+    public void testGetAccessor() {
+        // uses "getXxx"
+        assertThat(new FieldValidator(bean, TestFieldValidator.class, getField(INT_FIELD)).isEmpty()).isFalse();
+
+        // uses "isXxx"
+        assertThat(new FieldValidator(bean, TestFieldValidator.class, getField("boolValue")).isEmpty()).isFalse();
+    }
+
+    @Test
+    public void testGetMethod() {
+        assertThat(new FieldValidator(bean, TestFieldValidator.class, getField(INT_FIELD)).isEmpty()).isFalse();
+
+        // these are invalid for various reasons
+
+        Field noMethodField = getField("noMethod");
+        assertThatThrownBy(() -> new FieldValidator(bean, TestFieldValidator.class, noMethodField))
+                        .isInstanceOf(IllegalArgumentException.class);
+
+        Field staticMethodField = getField("staticMethod");
+        assertThatThrownBy(() -> new FieldValidator(bean, TestFieldValidator.class, staticMethodField))
+                        .isInstanceOf(IllegalArgumentException.class);
+    }
+
+    @Test
+    public void testValidMethod() {
+        assertThat(new FieldValidator(bean, TestFieldValidator.class, getField(INT_FIELD)).isEmpty()).isFalse();
+
+        // these are invalid for various reasons
+
+        Field staticMethodField = getField("staticMethod");
+        assertThatThrownBy(() -> new FieldValidator(bean, TestFieldValidator.class, staticMethodField))
+                        .isInstanceOf(IllegalArgumentException.class);
+
+        Field voidMethodField = getField("voidMethod");
+        assertThatThrownBy(() -> new FieldValidator(bean, TestFieldValidator.class, voidMethodField))
+                        .isInstanceOf(IllegalArgumentException.class);
+
+        Field paramMethodField = getField("parameterizedMethod");
+        assertThatThrownBy(() -> new FieldValidator(bean, TestFieldValidator.class, paramMethodField))
+                        .isInstanceOf(IllegalArgumentException.class);
+    }
+
+    @Test
+    public void testIsFieldAnnotated_testSetFieldAnnotated() {
+        // annotated at the field level
+        assertThat(new FieldValidator(bean, getClass(), getField(INT_FIELD)).isFieldAnnotated()).isTrue();
+
+        // unannotated
+        assertThat(new FieldValidator(bean, getClass(), getField(UNANNOTATED_FIELD)).isFieldAnnotated()).isFalse();
+    }
+
+    public static int getStaticMethod() {
+        return -1000;
+    }
+
+    public void getVoidMethod() {
+        // do nothing
+    }
+
+    public int getParameterizedMethod(boolean flag) {
+        return 0;
+    }
+
+    public int getExMethod() {
+        throw new RuntimeException("expected exception");
+    }
+
+    @NotNull
+    public static class ClassAnnot {
+        @Getter
+        private String text;
+
+        // no "get" method
+        @SuppressWarnings("unused")
+        private String noMethod;
+
+        @Getter
+        private static int staticValue;
+    }
+}