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Java/src/test/java/com/datastructures/StackTest.java at Development · iDev-git/Java · GitHub
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datastructures
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/
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/
test
/
java
/
com
/
datastructures
/
StackTest.java
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package
com
.
datastructures
;
import
org
.
junit
.
jupiter
.
api
.
Assertions
;
import
org
.
junit
.
jupiter
.
api
.
Test
;
import
java
.
util
.
EmptyStackException
;
class
StackTest
{
@
Test
void
testEmpty
() {
Stack
<
Integer
>
myStack
=
new
Stack
<>();
boolean
isEmpty
=
myStack
.
empty
();
Assertions
.
assertTrue
(
isEmpty
);
myStack
.
push
(
10
);
isEmpty
=
myStack
.
empty
();
Assertions
.
assertFalse
(
isEmpty
);
}
@
Test
void
testPeekWithoutElements
() {
Assertions
.
assertThrows
(
EmptyStackException
.
class
, () -> {
Stack
<
Integer
>
myStack
=
new
Stack
<>();
myStack
.
peek
();
});
}
@
Test
void
testPeekWithElements
() {
Stack
<
Integer
>
myStack
=
new
Stack
<>();
myStack
.
push
(
10
);
myStack
.
push
(
20
);
myStack
.
push
(
30
);
myStack
.
push
(
40
);
Assertions
.
assertEquals
(
40
, (
int
)
myStack
.
peek
());
}
@
Test
void
testPopWithoutElements
() {
Assertions
.
assertThrows
(
EmptyStackException
.
class
, () -> {
Stack
<
Integer
>
myStack
=
new
Stack
<>();
myStack
.
pop
();
});
}
@
Test
void
testPopWithElements
() {
Stack
<
Integer
>
myStack
=
new
Stack
<>();
myStack
.
push
(
10
);
myStack
.
push
(
20
);
myStack
.
push
(
30
);
myStack
.
push
(
40
);
myStack
.
push
(
50
);
Assertions
.
assertEquals
(
50
, (
int
)
myStack
.
pop
());
}
@
Test
void
testPushWithinInitialCapacity
() {
Stack
<
Integer
>
myStack
=
new
Stack
<>();
myStack
.
push
(
10
);
myStack
.
push
(
20
);
myStack
.
push
(
30
);
myStack
.
push
(
40
);
myStack
.
push
(
50
);
myStack
.
push
(
60
);
myStack
.
push
(
70
);
myStack
.
push
(
80
);
myStack
.
push
(
90
);
myStack
.
push
(
100
);
Assertions
.
assertEquals
(
10
,
myStack
.
size
());
}
@
Test
void
testPushOutsideInitialCapacity
() {
Stack
<
Integer
>
myStack
=
new
Stack
<>();
myStack
.
push
(
10
);
myStack
.
push
(
20
);
myStack
.
push
(
30
);
myStack
.
push
(
40
);
myStack
.
push
(
50
);
myStack
.
push
(
60
);
myStack
.
push
(
70
);
myStack
.
push
(
80
);
myStack
.
push
(
90
);
myStack
.
push
(
100
);
myStack
.
push
(
110
);
Assertions
.
assertEquals
(
11
,
myStack
.
size
());
}
@
Test
void
testSearchWithObjectUnavailable
() {
Stack
<
Integer
>
myStack
=
new
Stack
<>();
myStack
.
push
(
10
);
myStack
.
push
(
20
);
myStack
.
push
(
30
);
Assertions
.
assertEquals
(-
1
,
myStack
.
search
(
50
));
}
@
Test
void
testSearchWithObjectAvailable
() {
Stack
<
Integer
>
myStack
=
new
Stack
<>();
myStack
.
push
(
10
);
myStack
.
push
(
20
);
myStack
.
push
(
30
);
Assertions
.
assertEquals
(
3
,
myStack
.
search
(
10
));
}
}
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