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8e060ad0
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java-design-patterns
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体验新版 GitCode,发现更多精彩内容 >>
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8e060ad0
编写于
8月 08, 2020
作者:
A
Anurag Agarwal
浏览文件
操作
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电子邮件补丁
差异文件
Refactors null object pattern to java-11
上级
a5038c43
变更
4
隐藏空白更改
内联
并排
Showing
4 changed file
with
32 addition
and
33 deletion
+32
-33
null-object/src/main/java/com/iluwatar/nullobject/App.java
null-object/src/main/java/com/iluwatar/nullobject/App.java
+10
-6
null-object/src/test/java/com/iluwatar/nullobject/AppTest.java
...object/src/test/java/com/iluwatar/nullobject/AppTest.java
+1
-5
null-object/src/test/java/com/iluwatar/nullobject/NullNodeTest.java
...t/src/test/java/com/iluwatar/nullobject/NullNodeTest.java
+2
-2
null-object/src/test/java/com/iluwatar/nullobject/TreeTest.java
...bject/src/test/java/com/iluwatar/nullobject/TreeTest.java
+19
-20
未找到文件。
null-object/src/main/java/com/iluwatar/nullobject/App.java
浏览文件 @
8e060ad0
...
...
@@ -37,12 +37,16 @@ public class App {
* @param args command line args
*/
public
static
void
main
(
String
[]
args
)
{
Node
root
=
new
NodeImpl
(
"1"
,
new
NodeImpl
(
"11"
,
new
NodeImpl
(
"111"
,
NullNode
.
getInstance
(),
NullNode
.
getInstance
()),
NullNode
.
getInstance
()),
new
NodeImpl
(
"12"
,
NullNode
.
getInstance
(),
new
NodeImpl
(
"122"
,
NullNode
.
getInstance
(),
NullNode
.
getInstance
())));
Node
root
=
new
NodeImpl
(
"1"
,
new
NodeImpl
(
"11"
,
new
NodeImpl
(
"111"
,
NullNode
.
getInstance
(),
NullNode
.
getInstance
()),
NullNode
.
getInstance
()
),
new
NodeImpl
(
"12"
,
NullNode
.
getInstance
(),
new
NodeImpl
(
"122"
,
NullNode
.
getInstance
(),
NullNode
.
getInstance
())
)
);
root
.
walk
();
}
...
...
null-object/src/test/java/com/iluwatar/nullobject/AppTest.java
浏览文件 @
8e060ad0
...
...
@@ -26,15 +26,11 @@ package com.iluwatar.nullobject;
import
org.junit.jupiter.api.Test
;
/**
*
* Application test
*
*/
public
class
AppTest
{
@Test
public
void
test
()
{
String
[]
args
=
{};
App
.
main
(
args
);
App
.
main
(
new
String
[]{});
}
}
null-object/src/test/java/com/iluwatar/nullobject/NullNodeTest.java
浏览文件 @
8e060ad0
...
...
@@ -42,14 +42,14 @@ public class NullNodeTest {
*/
@Test
public
void
testGetInstance
()
{
final
NullNode
instance
=
NullNode
.
getInstance
();
final
var
instance
=
NullNode
.
getInstance
();
assertNotNull
(
instance
);
assertSame
(
instance
,
NullNode
.
getInstance
());
}
@Test
public
void
testFields
()
{
final
NullNode
node
=
NullNode
.
getInstance
();
final
var
node
=
NullNode
.
getInstance
();
assertEquals
(
0
,
node
.
getTreeSize
());
assertNull
(
node
.
getName
());
assertNull
(
node
.
getLeft
());
...
...
null-object/src/test/java/com/iluwatar/nullobject/TreeTest.java
浏览文件 @
8e060ad0
...
...
@@ -23,22 +23,21 @@
package
com.iluwatar.nullobject
;
import
static
org
.
junit
.
jupiter
.
api
.
Assertions
.
assertEquals
;
import
static
org
.
junit
.
jupiter
.
api
.
Assertions
.
assertNotNull
;
import
static
org
.
junit
.
jupiter
.
api
.
Assertions
.
assertSame
;
import
static
org
.
junit
.
jupiter
.
api
.
Assertions
.
assertTrue
;
import
ch.qos.logback.classic.Logger
;
import
ch.qos.logback.classic.spi.ILoggingEvent
;
import
ch.qos.logback.core.AppenderBase
;
import
java.util.LinkedList
;
import
java.util.List
;
import
org.junit.jupiter.api.AfterEach
;
import
org.junit.jupiter.api.BeforeEach
;
import
org.junit.jupiter.api.Test
;
import
org.slf4j.LoggerFactory
;
import
java.util.LinkedList
;
import
java.util.List
;
import
static
org
.
junit
.
jupiter
.
api
.
Assertions
.
assertEquals
;
import
static
org
.
junit
.
jupiter
.
api
.
Assertions
.
assertNotNull
;
import
static
org
.
junit
.
jupiter
.
api
.
Assertions
.
assertSame
;
import
static
org
.
junit
.
jupiter
.
api
.
Assertions
.
assertTrue
;
/**
* Date: 12/26/15 - 11:44 PM
*
...
...
@@ -75,12 +74,12 @@ public class TreeTest {
private
static
final
Node
TREE_ROOT
;
static
{
final
NodeImpl
level1B
=
new
NodeImpl
(
"level1_b"
,
NullNode
.
getInstance
(),
NullNode
.
getInstance
());
final
NodeImpl
level2B
=
new
NodeImpl
(
"level2_b"
,
NullNode
.
getInstance
(),
NullNode
.
getInstance
());
final
NodeImpl
level3A
=
new
NodeImpl
(
"level3_a"
,
NullNode
.
getInstance
(),
NullNode
.
getInstance
());
final
NodeImpl
level3B
=
new
NodeImpl
(
"level3_b"
,
NullNode
.
getInstance
(),
NullNode
.
getInstance
());
final
NodeImpl
level2A
=
new
NodeImpl
(
"level2_a"
,
level3A
,
level3B
);
final
NodeImpl
level1A
=
new
NodeImpl
(
"level1_a"
,
level2A
,
level2B
);
final
var
level1B
=
new
NodeImpl
(
"level1_b"
,
NullNode
.
getInstance
(),
NullNode
.
getInstance
());
final
var
level2B
=
new
NodeImpl
(
"level2_b"
,
NullNode
.
getInstance
(),
NullNode
.
getInstance
());
final
var
level3A
=
new
NodeImpl
(
"level3_a"
,
NullNode
.
getInstance
(),
NullNode
.
getInstance
());
final
var
level3B
=
new
NodeImpl
(
"level3_b"
,
NullNode
.
getInstance
(),
NullNode
.
getInstance
());
final
var
level2A
=
new
NodeImpl
(
"level2_a"
,
level3A
,
level3B
);
final
var
level1A
=
new
NodeImpl
(
"level1_a"
,
level2A
,
level2B
);
TREE_ROOT
=
new
NodeImpl
(
"root"
,
level1A
,
level1B
);
}
...
...
@@ -112,17 +111,17 @@ public class TreeTest {
@Test
public
void
testGetLeft
()
{
final
Node
level1
=
TREE_ROOT
.
getLeft
();
final
var
level1
=
TREE_ROOT
.
getLeft
();
assertNotNull
(
level1
);
assertEquals
(
"level1_a"
,
level1
.
getName
());
assertEquals
(
5
,
level1
.
getTreeSize
());
final
Node
level2
=
level1
.
getLeft
();
final
var
level2
=
level1
.
getLeft
();
assertNotNull
(
level2
);
assertEquals
(
"level2_a"
,
level2
.
getName
());
assertEquals
(
3
,
level2
.
getTreeSize
());
final
Node
level3
=
level2
.
getLeft
();
final
var
level3
=
level2
.
getLeft
();
assertNotNull
(
level3
);
assertEquals
(
"level3_a"
,
level3
.
getName
());
assertEquals
(
1
,
level3
.
getTreeSize
());
...
...
@@ -132,7 +131,7 @@ public class TreeTest {
@Test
public
void
testGetRight
()
{
final
Node
level1
=
TREE_ROOT
.
getRight
();
final
var
level1
=
TREE_ROOT
.
getRight
();
assertNotNull
(
level1
);
assertEquals
(
"level1_b"
,
level1
.
getName
());
assertEquals
(
1
,
level1
.
getTreeSize
());
...
...
@@ -140,7 +139,7 @@ public class TreeTest {
assertSame
(
NullNode
.
getInstance
(),
level1
.
getLeft
());
}
private
class
InMemoryAppender
extends
AppenderBase
<
ILoggingEvent
>
{
private
static
class
InMemoryAppender
extends
AppenderBase
<
ILoggingEvent
>
{
private
final
List
<
ILoggingEvent
>
log
=
new
LinkedList
<>();
public
InMemoryAppender
()
{
...
...
@@ -154,7 +153,7 @@ public class TreeTest {
}
public
boolean
logContains
(
String
message
)
{
return
log
.
stream
().
anyMatch
(
event
->
event
.
getMessage
().
equals
(
message
)
);
return
log
.
stream
().
map
(
ILoggingEvent:
:
getMessage
).
anyMatch
(
message:
:
equals
);
}
public
int
getLogSize
()
{
...
...
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