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Java > Open Source Codes > com > db4o > test > nativequery > expr > ExpressionTestCase


1 /* Copyright (C) 2004 - 2006 db4objects Inc. http://www.db4o.com
2
3 This file is part of the db4o open source object database.
4
5 db4o is free software; you can redistribute it and/or modify it under
6 the terms of version 2 of the GNU General Public License as published
7 by the Free Software Foundation and as clarified by db4objects' GPL
8 interpretation policy, available at
9 http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
10 Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
11 Suite 350, San Mateo, CA 94403, USA.
12
13 db4o is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 for more details.
17
18 You should have received a copy of the GNU General Public License along
19 with this program; if not, write to the Free Software Foundation, Inc.,
20 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 package com.db4o.test.nativequery.expr;
22
23 import com.db4o.nativequery.expr.*;
24 import com.db4o.nativequery.expr.cmp.*;
25 import com.db4o.nativequery.expr.cmp.field.*;
26
27 import db4ounit.*;
28
29 public class ExpressionTestCase implements TestCase {
30     public void testEqualsHashCodeFieldValue() {
31         FieldValue fieldValue = new FieldValue(PredicateFieldRoot.INSTANCE,"a");
32         assertEqualsHashCode(fieldValue,new FieldValue(PredicateFieldRoot.INSTANCE,"a"));
33         assertNotEquals(fieldValue,new FieldValue(PredicateFieldRoot.INSTANCE,"b"));
34     }
35     
36     public void testEqualsHashCodeConst() {
37         BoolConstExpression expr = BoolConstExpression.TRUE;
38         assertEqualsHashCode(expr,BoolConstExpression.TRUE);
39         assertNotEquals(expr,new FieldValue(PredicateFieldRoot.INSTANCE,"b"));
40     }
41
42     public void testEqualsHashCodeNot() {
43         NotExpression expr = new NotExpression(BoolConstExpression.TRUE);
44         assertEqualsHashCode(expr,new NotExpression(BoolConstExpression.TRUE));
45         assertNotEquals(expr,new NotExpression(BoolConstExpression.FALSE));
46     }
47
48     public void testEqualsHashCodeAnd() {
49         AndExpression expr = new AndExpression(BoolConstExpression.TRUE,BoolConstExpression.FALSE);
50         assertEqualsHashCode(expr,new AndExpression(BoolConstExpression.TRUE,BoolConstExpression.FALSE));
51         assertNotEquals(expr,new AndExpression(BoolConstExpression.FALSE,BoolConstExpression.FALSE));
52         assertNotEquals(expr,new AndExpression(BoolConstExpression.TRUE,BoolConstExpression.TRUE));
53         assertEqualsHashCode(expr,new AndExpression(BoolConstExpression.FALSE,BoolConstExpression.TRUE));
54     }
55
56     public void testEqualsHashCodeOr() {
57         OrExpression expr = new OrExpression(BoolConstExpression.TRUE,BoolConstExpression.FALSE);
58         assertEqualsHashCode(expr,new OrExpression(BoolConstExpression.TRUE,BoolConstExpression.FALSE));
59         assertNotEquals(expr,new OrExpression(BoolConstExpression.FALSE,BoolConstExpression.FALSE));
60         assertNotEquals(expr,new OrExpression(BoolConstExpression.TRUE,BoolConstExpression.TRUE));
61         assertEqualsHashCode(expr,new OrExpression(BoolConstExpression.FALSE,BoolConstExpression.TRUE));
62     }
63
64     public void testEqualsHashCodeComparison() {
65         FieldValue[] fieldVals={new FieldValue(PredicateFieldRoot.INSTANCE,"A"),new FieldValue(CandidateFieldRoot.INSTANCE,"B")};
66         ConstValue[] constVals={new ConstValue("X"),new ConstValue("Y")};
67         ComparisonExpression expr = new ComparisonExpression(fieldVals[0],constVals[0],ComparisonOperator.EQUALS);
68         assertEqualsHashCode(expr,new ComparisonExpression(fieldVals[0],constVals[0],ComparisonOperator.EQUALS));
69         assertNotEquals(expr,new ComparisonExpression(fieldVals[1],constVals[0],ComparisonOperator.EQUALS));
70         assertNotEquals(expr,new ComparisonExpression(fieldVals[0],constVals[1],ComparisonOperator.EQUALS));
71         assertNotEquals(expr,new ComparisonExpression(fieldVals[0],constVals[0],ComparisonOperator.SMALLER));
72     }
73
74     private void assertEqualsHashCode(Object JavaDoc obj,Object JavaDoc same) {
75         Assert.isTrue(obj.equals(obj));
76         Assert.isTrue(obj.equals(same));
77         Assert.isTrue(same.equals(obj));
78         Assert.isFalse(obj.equals(null));
79         Assert.isFalse(obj.equals(new Object JavaDoc()));
80         Assert.areEqual(obj.hashCode(),same.hashCode());
81     }
82
83     private void assertNotEquals(Object JavaDoc obj,Object JavaDoc other) {
84         Assert.isFalse(obj.equals(other));
85         Assert.isFalse(other.equals(obj));
86     }
87 }
88
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