[Add] PixivSearchBuilder 增加equals, hashCode, toString方法的覆写;

[Update] PixivSearchBuilderTest 补充测试项;

src/test/java/net/lamgc/cgj/pixiv/PixivSearchBuilderTest.java

@@ -1,5 +1,6 @@
 package net.lamgc.cgj.pixiv;
 
+import org.junit.Assert;
 import org.junit.Test;
 
 public class PixivSearchBuilderTest {
@@ -12,4 +13,14 @@ public class PixivSearchBuilderTest {
         System.out.println(builder.buildURL());
     }
 
+    @Test
+    public void equalsTest() {
+        Assert.assertEquals(new PixivSearchBuilder("风景"), new PixivSearchBuilder("风景"));
+    }
+
+    @Test
+    public void hashCodeTest() {
+        Assert.assertEquals(new PixivSearchBuilder("风景").hashCode(), new PixivSearchBuilder("风景").hashCode());
+    }
+
 }