commom/Preconditions Util Test (#1727)

* common/parameterUtils unit test

dolphinscheduler-common/src/test/java/org/apache/dolphinscheduler/common/utils/PreconditionsTest.java

+/*
+ * 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.dolphinscheduler.common.utils;
+
+import org.junit.Assert;
+import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import static org.hamcrest.core.StringContains.containsString;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertThat;
+
+
+public class PreconditionsTest {
+    public static final Logger logger = LoggerFactory.getLogger(PreconditionsTest.class);
+
+    /**
+     * Test checkNotNull
+     */
+    @Test
+    public void testCheckNotNull() throws Exception {
+        String testReference = "test reference";
+        //test  reference is not null
+        Assert.assertEquals(testReference,Preconditions.checkNotNull(testReference));
+        Assert.assertEquals(testReference,Preconditions.checkNotNull(testReference,"reference is null"));
+        Assert.assertEquals(testReference,Preconditions.checkNotNull(testReference,"%s is null",testReference));
+
+        //test  reference is  null
+        try {
+            Preconditions.checkNotNull(null);
+        } catch (NullPointerException ex) {
+            assertNull(ex.getMessage());
+        }
+
+        try {
+            Preconditions.checkNotNull("");
+        } catch (NullPointerException ex) {
+            assertNull(ex.getMessage());
+        }
+        //test  reference is  null ,expect contains errorMessage
+        try {
+            Preconditions.checkNotNull(null,"reference is null");
+        } catch (NullPointerException ex) {
+            assertThat(ex.getMessage(), containsString("reference is null"));
+        }
+
+        try {
+            Preconditions.checkNotNull("","reference is null");
+        } catch (NullPointerException ex) {
+            assertThat(ex.getMessage(), containsString("reference is null"));
+        }
+
+        //test  reference is  null ,expect contains errorMessageTemplate and errorMessageArgs
+        try {
+            Preconditions.checkNotNull(null,"%s is null",testReference);
+        } catch (NullPointerException ex) {
+            assertThat(ex.getMessage(), containsString(testReference + " is null"));
+        }
+
+        try {
+            Preconditions.checkNotNull("","%s is null",testReference);
+        } catch (NullPointerException ex) {
+            assertThat(ex.getMessage(), containsString(testReference + " is null"));
+        }
+    }
+
+    /**
+     * Test checkArgument
+     */
+    @Test
+    public void testCheckArgument() throws Exception {
+
+        int argument = 100;
+        //boolean condition is true
+        Preconditions.checkArgument(argument > 0 && argument < 200);
+
+        //boolean condition is false
+        try {
+            Preconditions.checkArgument(argument > 0 && argument < 50);
+        } catch (IllegalArgumentException ex) {
+            assertNull(ex.getMessage());
+        }
+
+        //boolean condition is false ,expect contains errorMessage
+        try {
+            Preconditions.checkArgument(argument > 300, "argument is error");
+        } catch (IllegalArgumentException ex) {
+            assertThat(ex.getMessage(), containsString("argument is error"));
+        }
+
+        //boolean condition is false,expect contains errorMessageTemplate and errorMessageArgs
+        try {
+            Preconditions.checkArgument(argument > 0 && argument < 99, "argument %s is error",argument);
+        } catch (IllegalArgumentException ex) {
+            assertThat(ex.getMessage(), containsString( "argument " + argument +  " is error"));
+        }
+    }
+
+    /**
+     * Test checkState
+     */
+    @Test
+    public void testCheckState() throws Exception {
+        int state = 1;
+        //boolean condition is true
+        Preconditions.checkState(state == 1);
+        Preconditions.checkState(state > -1);
+
+        //boolean condition is false
+        try {
+            Preconditions.checkState(state > 2);
+        } catch (IllegalStateException ex) {
+            assertNull(ex.getMessage());
+        }
+
+        //boolean condition is false ,expect contains errorMessage
+        try {
+            Preconditions.checkState(state < 1, "state is error");
+        } catch (IllegalStateException ex) {
+            assertThat(ex.getMessage(), containsString("state is error"));
+        }
+
+        //boolean condition is false,expect contains errorMessageTemplate and errorMessageArgs
+        try {
+            Preconditions.checkState(state < -1 , "state %s is error",state);
+        } catch (IllegalStateException ex) {
+            assertThat(ex.getMessage(), containsString( "state " + state +  " is error"));
+        }
+    }
+
+    /**
+     * Test checkElementIndex
+     */
+    @Test
+    public void testCheckElementIndex() throws Exception {
+        int index = 2;
+        int size = 30;
+
+        //boolean condition is true
+        Preconditions.checkElementIndex(index, size);
+
+        //boolean condition is false
+        try {
+            Preconditions.checkElementIndex(-1, 10);
+        } catch (IndexOutOfBoundsException ex) {
+            assertThat(ex.getMessage(), containsString("Index: -1, Size: 10"));
+        }
+
+        //boolean condition is false ,expect contains errorMessage
+        try {
+            Preconditions.checkElementIndex(100, 50, "index is greater than size");
+        } catch (IndexOutOfBoundsException ex) {
+            assertThat(ex.getMessage(), containsString("index is greater than size Index: 100, Size: 50"));
+        }
+    }
+}