Junit Test for InputStreamReader with Mockito
3
Can you please help me in writing the Junit test case for the below code?
public class ConsoleReader implements InputReader {
public Cell readInput() {
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
System.out.print("Enter the co-ordinate Seperated by Comma");
String coOrdinates = reader.readLine();
String values=coOrdinates.split("\,");
return new Cell(Integer.parseInt(values[0]),Integer.parseInt(values[1]));
} catch (IOException ioe) {
ioe.printStackTrace();
}
return null;
}
}
java junit mockito
asked Nov 20 '18 at 12:02
SunnySunny
17013
add a comment |
3
Can you please help me in writing the Junit test case for the below code?
public class ConsoleReader implements InputReader {
public Cell readInput() {
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
System.out.print("Enter the co-ordinate Seperated by Comma");
String coOrdinates = reader.readLine();
String values=coOrdinates.split("\,");
return new Cell(Integer.parseInt(values[0]),Integer.parseInt(values[1]));
} catch (IOException ioe) {
ioe.printStackTrace();
}
return null;
}
}
java junit mockito
asked Nov 20 '18 at 12:02
SunnySunny
17013
1
Insteed ofnew InputStreamReader(System.in)passSystem.inas method argument so you will be able to actually push data into the stream.
– Antoniossss
Nov 20 '18 at 12:10
Possible duplicate of Mocking Java InputStream
– Renny
Nov 20 '18 at 13:01
1
as Antoniossss has suggested the best solution (even from design perspective). if you dont like that solution , there is a tricky/dirty solution. use the System.setIn and set a mock inputstream , once your test case is executed restore the system.in using the same method. this will work only in environment you dont have securitymanger or you have permission to setIO
– hunter
Nov 20 '18 at 13:57
add a comment |
3
3
3
Can you please help me in writing the Junit test case for the below code?
public class ConsoleReader implements InputReader {
public Cell readInput() {
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
System.out.print("Enter the co-ordinate Seperated by Comma");
String coOrdinates = reader.readLine();
String values=coOrdinates.split("\,");
return new Cell(Integer.parseInt(values[0]),Integer.parseInt(values[1]));
} catch (IOException ioe) {
ioe.printStackTrace();
}
return null;
}
}
java junit mockito
asked Nov 20 '18 at 12:02
SunnySunny
17013
Can you please help me in writing the Junit test case for the below code?
public class ConsoleReader implements InputReader {
public Cell readInput() {
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
System.out.print("Enter the co-ordinate Seperated by Comma");
String coOrdinates = reader.readLine();
String values=coOrdinates.split("\,");
return new Cell(Integer.parseInt(values[0]),Integer.parseInt(values[1]));
} catch (IOException ioe) {
ioe.printStackTrace();
}
return null;
}
}
java junit mockito
java junit mockito
asked Nov 20 '18 at 12:02
SunnySunny
17013
asked Nov 20 '18 at 12:02
SunnySunny
17013
edited Nov 20 '18 at 12:08
Sunny
asked Nov 20 '18 at 12:02
SunnySunny
17013
asked Nov 20 '18 at 12:02
SunnySunny
17013
asked Nov 20 '18 at 12:02
SunnySunny
17013
17013
1
Insteed ofnew InputStreamReader(System.in)passSystem.inas method argument so you will be able to actually push data into the stream.
– Antoniossss
Nov 20 '18 at 12:10
Possible duplicate of Mocking Java InputStream
– Renny
Nov 20 '18 at 13:01
1
as Antoniossss has suggested the best solution (even from design perspective). if you dont like that solution , there is a tricky/dirty solution. use the System.setIn and set a mock inputstream , once your test case is executed restore the system.in using the same method. this will work only in environment you dont have securitymanger or you have permission to setIO
– hunter
Nov 20 '18 at 13:57
add a comment |
1
Insteed ofnew InputStreamReader(System.in)passSystem.inas method argument so you will be able to actually push data into the stream.
– Antoniossss
Nov 20 '18 at 12:10
Possible duplicate of Mocking Java InputStream
– Renny
Nov 20 '18 at 13:01
1
as Antoniossss has suggested the best solution (even from design perspective). if you dont like that solution , there is a tricky/dirty solution. use the System.setIn and set a mock inputstream , once your test case is executed restore the system.in using the same method. this will work only in environment you dont have securitymanger or you have permission to setIO
– hunter
Nov 20 '18 at 13:57
1
1
Insteed of
new InputStreamReader(System.in) pass System.in as method argument so you will be able to actually push data into the stream.– Antoniossss
Nov 20 '18 at 12:10
Insteed of
new InputStreamReader(System.in) pass System.in as method argument so you will be able to actually push data into the stream.– Antoniossss
Nov 20 '18 at 12:10
Possible duplicate of Mocking Java InputStream
– Renny
Nov 20 '18 at 13:01
Possible duplicate of Mocking Java InputStream
– Renny
Nov 20 '18 at 13:01
1
1
as Antoniossss has suggested the best solution (even from design perspective). if you dont like that solution , there is a tricky/dirty solution. use the System.setIn and set a mock inputstream , once your test case is executed restore the system.in using the same method. this will work only in environment you dont have securitymanger or you have permission to setIO
– hunter
Nov 20 '18 at 13:57
as Antoniossss has suggested the best solution (even from design perspective). if you dont like that solution , there is a tricky/dirty solution. use the System.setIn and set a mock inputstream , once your test case is executed restore the system.in using the same method. this will work only in environment you dont have securitymanger or you have permission to setIO
– hunter
Nov 20 '18 at 13:57
add a comment |
2 Answers
2
active
oldest
votes
0
You can use Mockito to mock the BufferedReader, like the example below.
BufferedReader bufferedReader = Mockito.mock(BufferedReader.class);
Mockito.when(bufferedReader.readLine()).thenReturn("1", "2", "3");
// You can mock the result based on the type of result you are expecting.
answered Nov 20 '18 at 12:33
joemokenelajoemokenela
1616
But he must pass that mock first.
– Antoniossss
Nov 20 '18 at 12:37
add a comment |
2
Extract the
readeras a field. (You can initiaize it either directly or in constructor)
private final BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
Define a getter (either
publicorprotected)
protected BufferedReader getReader(){
return reader;
}
Remove initialization of
new BufferedReader(...)from your method. Retrieve it usinggetReader()instead.
public Cell readInput() {
try {
System.out.print("Enter the co-ordinate Seperated by Comma");
String coOrdinates = getReader().readLine();
String values=coOrdinates.split("\,");
return new Cell(Integer.parseInt(values[0]),Integer.parseInt(values[1]));
} catch (IOException ioe) {
ioe.printStackTrace();
}
return null;
}
In your test class initialize your
ConsoleReaderasMockito.spy
ConsoleReader consoleReader = spy(new ConsoleReader());
Mock your getter
@Before
public void setUp() {
BufferedReader bufferedReader = mock(BufferedReader.class);
doReturn(bufferedReader).when(consoleReader).getReader();
doCallRealMethod().when(consoleReader).readInput();
}
Define your test:
@Test
public void testReadInput() {
when(bufferedReader.readLine()).thenReturn("123,456");
Cell expectedCell = new Cell(123, 456);
Cell actualCell = consoleReader.readInput();
assertEquals(expectedCell, actualCell);
}
answered Nov 20 '18 at 15:06
ETOETO
2,6231628
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
0
You can use Mockito to mock the BufferedReader, like the example below.
BufferedReader bufferedReader = Mockito.mock(BufferedReader.class);
Mockito.when(bufferedReader.readLine()).thenReturn("1", "2", "3");
// You can mock the result based on the type of result you are expecting.
answered Nov 20 '18 at 12:33
joemokenelajoemokenela
1616
But he must pass that mock first.
– Antoniossss
Nov 20 '18 at 12:37
add a comment |
0
You can use Mockito to mock the BufferedReader, like the example below.
BufferedReader bufferedReader = Mockito.mock(BufferedReader.class);
Mockito.when(bufferedReader.readLine()).thenReturn("1", "2", "3");
// You can mock the result based on the type of result you are expecting.
answered Nov 20 '18 at 12:33
joemokenelajoemokenela
1616
But he must pass that mock first.
– Antoniossss
Nov 20 '18 at 12:37
add a comment |
0
0
0
You can use Mockito to mock the BufferedReader, like the example below.
BufferedReader bufferedReader = Mockito.mock(BufferedReader.class);
Mockito.when(bufferedReader.readLine()).thenReturn("1", "2", "3");
// You can mock the result based on the type of result you are expecting.
answered Nov 20 '18 at 12:33
joemokenelajoemokenela
1616
You can use Mockito to mock the BufferedReader, like the example below.
BufferedReader bufferedReader = Mockito.mock(BufferedReader.class);
Mockito.when(bufferedReader.readLine()).thenReturn("1", "2", "3");
// You can mock the result based on the type of result you are expecting.
answered Nov 20 '18 at 12:33
joemokenelajoemokenela
1616
answered Nov 20 '18 at 12:33
joemokenelajoemokenela
1616
answered Nov 20 '18 at 12:33
joemokenelajoemokenela
1616
answered Nov 20 '18 at 12:33
joemokenelajoemokenela
1616
1616
But he must pass that mock first.
– Antoniossss
Nov 20 '18 at 12:37
add a comment |
But he must pass that mock first.
– Antoniossss
Nov 20 '18 at 12:37
But he must pass that mock first.
– Antoniossss
Nov 20 '18 at 12:37
But he must pass that mock first.
– Antoniossss
Nov 20 '18 at 12:37
add a comment |
2
Extract the
readeras a field. (You can initiaize it either directly or in constructor)
private final BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
Define a getter (either
publicorprotected)
protected BufferedReader getReader(){
return reader;
}
Remove initialization of
new BufferedReader(...)from your method. Retrieve it usinggetReader()instead.
public Cell readInput() {
try {
System.out.print("Enter the co-ordinate Seperated by Comma");
String coOrdinates = getReader().readLine();
String values=coOrdinates.split("\,");
return new Cell(Integer.parseInt(values[0]),Integer.parseInt(values[1]));
} catch (IOException ioe) {
ioe.printStackTrace();
}
return null;
}
In your test class initialize your
ConsoleReaderasMockito.spy
ConsoleReader consoleReader = spy(new ConsoleReader());
Mock your getter
@Before
public void setUp() {
BufferedReader bufferedReader = mock(BufferedReader.class);
doReturn(bufferedReader).when(consoleReader).getReader();
doCallRealMethod().when(consoleReader).readInput();
}
Define your test:
@Test
public void testReadInput() {
when(bufferedReader.readLine()).thenReturn("123,456");
Cell expectedCell = new Cell(123, 456);
Cell actualCell = consoleReader.readInput();
assertEquals(expectedCell, actualCell);
}
answered Nov 20 '18 at 15:06
ETOETO
2,6231628
add a comment |
2
Extract the
readeras a field. (You can initiaize it either directly or in constructor)
private final BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
Define a getter (either
publicorprotected)
protected BufferedReader getReader(){
return reader;
}
Remove initialization of
new BufferedReader(...)from your method. Retrieve it usinggetReader()instead.
public Cell readInput() {
try {
System.out.print("Enter the co-ordinate Seperated by Comma");
String coOrdinates = getReader().readLine();
String values=coOrdinates.split("\,");
return new Cell(Integer.parseInt(values[0]),Integer.parseInt(values[1]));
} catch (IOException ioe) {
ioe.printStackTrace();
}
return null;
}
In your test class initialize your
ConsoleReaderasMockito.spy
ConsoleReader consoleReader = spy(new ConsoleReader());
Mock your getter
@Before
public void setUp() {
BufferedReader bufferedReader = mock(BufferedReader.class);
doReturn(bufferedReader).when(consoleReader).getReader();
doCallRealMethod().when(consoleReader).readInput();
}
Define your test:
@Test
public void testReadInput() {
when(bufferedReader.readLine()).thenReturn("123,456");
Cell expectedCell = new Cell(123, 456);
Cell actualCell = consoleReader.readInput();
assertEquals(expectedCell, actualCell);
}
answered Nov 20 '18 at 15:06
ETOETO
2,6231628
add a comment |
2
2
2
Extract the
readeras a field. (You can initiaize it either directly or in constructor)
private final BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
Define a getter (either
publicorprotected)
protected BufferedReader getReader(){
return reader;
}
Remove initialization of
new BufferedReader(...)from your method. Retrieve it usinggetReader()instead.
public Cell readInput() {
try {
System.out.print("Enter the co-ordinate Seperated by Comma");
String coOrdinates = getReader().readLine();
String values=coOrdinates.split("\,");
return new Cell(Integer.parseInt(values[0]),Integer.parseInt(values[1]));
} catch (IOException ioe) {
ioe.printStackTrace();
}
return null;
}
In your test class initialize your
ConsoleReaderasMockito.spy
ConsoleReader consoleReader = spy(new ConsoleReader());
Mock your getter
@Before
public void setUp() {
BufferedReader bufferedReader = mock(BufferedReader.class);
doReturn(bufferedReader).when(consoleReader).getReader();
doCallRealMethod().when(consoleReader).readInput();
}
Define your test:
@Test
public void testReadInput() {
when(bufferedReader.readLine()).thenReturn("123,456");
Cell expectedCell = new Cell(123, 456);
Cell actualCell = consoleReader.readInput();
assertEquals(expectedCell, actualCell);
}
answered Nov 20 '18 at 15:06
ETOETO
2,6231628
Extract the
readeras a field. (You can initiaize it either directly or in constructor)
private final BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
Define a getter (either
publicorprotected)
protected BufferedReader getReader(){
return reader;
}
Remove initialization of
new BufferedReader(...)from your method. Retrieve it usinggetReader()instead.
public Cell readInput() {
try {
System.out.print("Enter the co-ordinate Seperated by Comma");
String coOrdinates = getReader().readLine();
String values=coOrdinates.split("\,");
return new Cell(Integer.parseInt(values[0]),Integer.parseInt(values[1]));
} catch (IOException ioe) {
ioe.printStackTrace();
}
return null;
}
In your test class initialize your
ConsoleReaderasMockito.spy
ConsoleReader consoleReader = spy(new ConsoleReader());
Mock your getter
@Before
public void setUp() {
BufferedReader bufferedReader = mock(BufferedReader.class);
doReturn(bufferedReader).when(consoleReader).getReader();
doCallRealMethod().when(consoleReader).readInput();
}
Define your test:
@Test
public void testReadInput() {
when(bufferedReader.readLine()).thenReturn("123,456");
Cell expectedCell = new Cell(123, 456);
Cell actualCell = consoleReader.readInput();
assertEquals(expectedCell, actualCell);
}
answered Nov 20 '18 at 15:06
ETOETO
2,6231628
answered Nov 20 '18 at 15:06
ETOETO
2,6231628
answered Nov 20 '18 at 15:06
ETOETO
2,6231628
answered Nov 20 '18 at 15:06
ETOETO
2,6231628
2,6231628
add a comment |
add a comment |
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1
Insteed of
new InputStreamReader(System.in)passSystem.inas method argument so you will be able to actually push data into the stream.– Antoniossss
Nov 20 '18 at 12:10
Possible duplicate of Mocking Java InputStream
– Renny
Nov 20 '18 at 13:01
1
as Antoniossss has suggested the best solution (even from design perspective). if you dont like that solution , there is a tricky/dirty solution. use the System.setIn and set a mock inputstream , once your test case is executed restore the system.in using the same method. this will work only in environment you dont have securitymanger or you have permission to setIO
– hunter
Nov 20 '18 at 13:57