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using json unit test files in a java program
How do I test a private function or a class that has private methods, fields or inner classes?Is Java “pass-by-reference” or “pass-by-value”?How do I efficiently iterate over each entry in a Java Map?Unit Testing C CodeWhat's the best strategy for unit-testing database-driven applications?How do I read / convert an InputStream into a String in Java?When to use LinkedList over ArrayList in Java?How do I generate random integers within a specific range in Java?How do I convert a String to an int in Java?Creating a memory leak with Java
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I am trying to unit test some code. I have 2 fields in my input data that may or may not be in the data, so I want to test all 4 scenarios (ab, a not b, b not a, neither a nor b). I created 4 different json files to use as mocked input, covering each scenario. I could have created one file with neither field, and then just added the required field into the mock data for each of the 4 tests. That approach to me, seems like the test has too much control over the test data. I prefer the 4 files approach, but one of my coworkers is complaining about 4 files being almost exactly the same.
I know this is asking for opinion, but which seems like a better approach? Have all 4 files, or have each test manipulate the data before the assertion?
java unit-testing
edited Mar 29 at 8:43
Krishnan Mahadevan
9,9183 gold badges19 silver badges47 bronze badges
asked Mar 28 at 20:53
MarkMark
8061 gold badge12 silver badges41 bronze badges
add a comment
|
I am trying to unit test some code. I have 2 fields in my input data that may or may not be in the data, so I want to test all 4 scenarios (ab, a not b, b not a, neither a nor b). I created 4 different json files to use as mocked input, covering each scenario. I could have created one file with neither field, and then just added the required field into the mock data for each of the 4 tests. That approach to me, seems like the test has too much control over the test data. I prefer the 4 files approach, but one of my coworkers is complaining about 4 files being almost exactly the same.
I know this is asking for opinion, but which seems like a better approach? Have all 4 files, or have each test manipulate the data before the assertion?
java unit-testing
edited Mar 29 at 8:43
Krishnan Mahadevan
9,9183 gold badges19 silver badges47 bronze badges
asked Mar 28 at 20:53
MarkMark
8061 gold badge12 silver badges41 bronze badges
It kinda depends. If the files are super big, then just one. If they are smaller, then it depends on if it takes longer to change a value, or add a value. 4 files will take longer to load though.
– JustAFellowCoder
Mar 28 at 20:58
My vote is no files -- If this were me I'd want the test to just inject the json directly, so I don't have to keep the contents of the files in sync with my test over time. I might consider using files if the data was really large. If your class under test requires you provide a file, it's probably doing too much anyway, and should be split up.
– Gus
Mar 28 at 21:01
Also consider cost of maintenance. If those two fields turn into four and you need to test all combinations, you have to supply 16 files.
– Not a JD
Mar 28 at 21:09
my 4 files are fairly small (60 lines each)
– Mark
Mar 28 at 21:37
60 lines, not much of a problem either way won't make a difference. Completely arbitrary. Just different ways you'll have to code it.
– JustAFellowCoder
Mar 29 at 0:43
add a comment
|
I am trying to unit test some code. I have 2 fields in my input data that may or may not be in the data, so I want to test all 4 scenarios (ab, a not b, b not a, neither a nor b). I created 4 different json files to use as mocked input, covering each scenario. I could have created one file with neither field, and then just added the required field into the mock data for each of the 4 tests. That approach to me, seems like the test has too much control over the test data. I prefer the 4 files approach, but one of my coworkers is complaining about 4 files being almost exactly the same.
I know this is asking for opinion, but which seems like a better approach? Have all 4 files, or have each test manipulate the data before the assertion?
java unit-testing
edited Mar 29 at 8:43
Krishnan Mahadevan
9,9183 gold badges19 silver badges47 bronze badges
asked Mar 28 at 20:53
MarkMark
8061 gold badge12 silver badges41 bronze badges
I am trying to unit test some code. I have 2 fields in my input data that may or may not be in the data, so I want to test all 4 scenarios (ab, a not b, b not a, neither a nor b). I created 4 different json files to use as mocked input, covering each scenario. I could have created one file with neither field, and then just added the required field into the mock data for each of the 4 tests. That approach to me, seems like the test has too much control over the test data. I prefer the 4 files approach, but one of my coworkers is complaining about 4 files being almost exactly the same.
I know this is asking for opinion, but which seems like a better approach? Have all 4 files, or have each test manipulate the data before the assertion?
java unit-testing
java unit-testing
edited Mar 29 at 8:43
Krishnan Mahadevan
9,9183 gold badges19 silver badges47 bronze badges
asked Mar 28 at 20:53
MarkMark
8061 gold badge12 silver badges41 bronze badges
edited Mar 29 at 8:43
Krishnan Mahadevan
9,9183 gold badges19 silver badges47 bronze badges
asked Mar 28 at 20:53
MarkMark
8061 gold badge12 silver badges41 bronze badges
edited Mar 29 at 8:43
Krishnan Mahadevan
9,9183 gold badges19 silver badges47 bronze badges
edited Mar 29 at 8:43
Krishnan Mahadevan
9,9183 gold badges19 silver badges47 bronze badges
edited Mar 29 at 8:43
Krishnan Mahadevan
9,9183 gold badges19 silver badges47 bronze badges
9,9183 gold badges19 silver badges47 bronze badges
asked Mar 28 at 20:53
MarkMark
8061 gold badge12 silver badges41 bronze badges
asked Mar 28 at 20:53
MarkMark
8061 gold badge12 silver badges41 bronze badges
asked Mar 28 at 20:53
MarkMark
8061 gold badge12 silver badges41 bronze badges
8061 gold badge12 silver badges41 bronze badges
It kinda depends. If the files are super big, then just one. If they are smaller, then it depends on if it takes longer to change a value, or add a value. 4 files will take longer to load though.
– JustAFellowCoder
Mar 28 at 20:58
My vote is no files -- If this were me I'd want the test to just inject the json directly, so I don't have to keep the contents of the files in sync with my test over time. I might consider using files if the data was really large. If your class under test requires you provide a file, it's probably doing too much anyway, and should be split up.
– Gus
Mar 28 at 21:01
Also consider cost of maintenance. If those two fields turn into four and you need to test all combinations, you have to supply 16 files.
– Not a JD
Mar 28 at 21:09
my 4 files are fairly small (60 lines each)
– Mark
Mar 28 at 21:37
60 lines, not much of a problem either way won't make a difference. Completely arbitrary. Just different ways you'll have to code it.
– JustAFellowCoder
Mar 29 at 0:43
add a comment
|
It kinda depends. If the files are super big, then just one. If they are smaller, then it depends on if it takes longer to change a value, or add a value. 4 files will take longer to load though.
– JustAFellowCoder
Mar 28 at 20:58
My vote is no files -- If this were me I'd want the test to just inject the json directly, so I don't have to keep the contents of the files in sync with my test over time. I might consider using files if the data was really large. If your class under test requires you provide a file, it's probably doing too much anyway, and should be split up.
– Gus
Mar 28 at 21:01
Also consider cost of maintenance. If those two fields turn into four and you need to test all combinations, you have to supply 16 files.
– Not a JD
Mar 28 at 21:09
my 4 files are fairly small (60 lines each)
– Mark
Mar 28 at 21:37
60 lines, not much of a problem either way won't make a difference. Completely arbitrary. Just different ways you'll have to code it.
– JustAFellowCoder
Mar 29 at 0:43
It kinda depends. If the files are super big, then just one. If they are smaller, then it depends on if it takes longer to change a value, or add a value. 4 files will take longer to load though.
– JustAFellowCoder
Mar 28 at 20:58
It kinda depends. If the files are super big, then just one. If they are smaller, then it depends on if it takes longer to change a value, or add a value. 4 files will take longer to load though.
– JustAFellowCoder
Mar 28 at 20:58
My vote is no files -- If this were me I'd want the test to just inject the json directly, so I don't have to keep the contents of the files in sync with my test over time. I might consider using files if the data was really large. If your class under test requires you provide a file, it's probably doing too much anyway, and should be split up.
– Gus
Mar 28 at 21:01
My vote is no files -- If this were me I'd want the test to just inject the json directly, so I don't have to keep the contents of the files in sync with my test over time. I might consider using files if the data was really large. If your class under test requires you provide a file, it's probably doing too much anyway, and should be split up.
– Gus
Mar 28 at 21:01
Also consider cost of maintenance. If those two fields turn into four and you need to test all combinations, you have to supply 16 files.
– Not a JD
Mar 28 at 21:09
Also consider cost of maintenance. If those two fields turn into four and you need to test all combinations, you have to supply 16 files.
– Not a JD
Mar 28 at 21:09
my 4 files are fairly small (60 lines each)
– Mark
Mar 28 at 21:37
my 4 files are fairly small (60 lines each)
– Mark
Mar 28 at 21:37
60 lines, not much of a problem either way won't make a difference. Completely arbitrary. Just different ways you'll have to code it.
– JustAFellowCoder
Mar 29 at 0:43
60 lines, not much of a problem either way won't make a difference. Completely arbitrary. Just different ways you'll have to code it.
– JustAFellowCoder
Mar 29 at 0:43
add a comment
|
1 Answer
1
active
oldest
votes
Like for me, your coworker is right.
Create two files: a.json-part and b.json-part. Let's a.json-part contains
"a": .....
and b.json-part contains similar content for b (NB: not a JSON, just a part!)
So, for your tests you can build test data by simple concatenation of parts like
String ab_json = "" + readAsText("a.json-part") + "," + readAsText("b.json-part") + "";
String a_not_b_json = "" + readAsText("a.json-part") + "";
and so on.
In this case you can combine your fields as you want and can be sure you didn't miss any file in case if some field is changed.
answered Mar 28 at 23:07
Bor LazeBor Laze
2,1868 silver badges18 bronze badges
add a comment
|
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Like for me, your coworker is right.
Create two files: a.json-part and b.json-part. Let's a.json-part contains
"a": .....
and b.json-part contains similar content for b (NB: not a JSON, just a part!)
So, for your tests you can build test data by simple concatenation of parts like
String ab_json = "" + readAsText("a.json-part") + "," + readAsText("b.json-part") + "";
String a_not_b_json = "" + readAsText("a.json-part") + "";
and so on.
In this case you can combine your fields as you want and can be sure you didn't miss any file in case if some field is changed.
answered Mar 28 at 23:07
Bor LazeBor Laze
2,1868 silver badges18 bronze badges
add a comment
|
Like for me, your coworker is right.
Create two files: a.json-part and b.json-part. Let's a.json-part contains
"a": .....
and b.json-part contains similar content for b (NB: not a JSON, just a part!)
So, for your tests you can build test data by simple concatenation of parts like
String ab_json = "" + readAsText("a.json-part") + "," + readAsText("b.json-part") + "";
String a_not_b_json = "" + readAsText("a.json-part") + "";
and so on.
In this case you can combine your fields as you want and can be sure you didn't miss any file in case if some field is changed.
answered Mar 28 at 23:07
Bor LazeBor Laze
2,1868 silver badges18 bronze badges
add a comment
|
Like for me, your coworker is right.
Create two files: a.json-part and b.json-part. Let's a.json-part contains
"a": .....
and b.json-part contains similar content for b (NB: not a JSON, just a part!)
So, for your tests you can build test data by simple concatenation of parts like
String ab_json = "" + readAsText("a.json-part") + "," + readAsText("b.json-part") + "";
String a_not_b_json = "" + readAsText("a.json-part") + "";
and so on.
In this case you can combine your fields as you want and can be sure you didn't miss any file in case if some field is changed.
answered Mar 28 at 23:07
Bor LazeBor Laze
2,1868 silver badges18 bronze badges
Like for me, your coworker is right.
Create two files: a.json-part and b.json-part. Let's a.json-part contains
"a": .....
and b.json-part contains similar content for b (NB: not a JSON, just a part!)
So, for your tests you can build test data by simple concatenation of parts like
String ab_json = "" + readAsText("a.json-part") + "," + readAsText("b.json-part") + "";
String a_not_b_json = "" + readAsText("a.json-part") + "";
and so on.
In this case you can combine your fields as you want and can be sure you didn't miss any file in case if some field is changed.
answered Mar 28 at 23:07
Bor LazeBor Laze
2,1868 silver badges18 bronze badges
answered Mar 28 at 23:07
Bor LazeBor Laze
2,1868 silver badges18 bronze badges
answered Mar 28 at 23:07
Bor LazeBor Laze
2,1868 silver badges18 bronze badges
answered Mar 28 at 23:07
Bor LazeBor Laze
2,1868 silver badges18 bronze badges
2,1868 silver badges18 bronze badges
add a comment
|
add a comment
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It kinda depends. If the files are super big, then just one. If they are smaller, then it depends on if it takes longer to change a value, or add a value. 4 files will take longer to load though.
– JustAFellowCoder
Mar 28 at 20:58
My vote is no files -- If this were me I'd want the test to just inject the json directly, so I don't have to keep the contents of the files in sync with my test over time. I might consider using files if the data was really large. If your class under test requires you provide a file, it's probably doing too much anyway, and should be split up.
– Gus
Mar 28 at 21:01
Also consider cost of maintenance. If those two fields turn into four and you need to test all combinations, you have to supply 16 files.
– Not a JD
Mar 28 at 21:09
my 4 files are fairly small (60 lines each)
– Mark
Mar 28 at 21:37
60 lines, not much of a problem either way won't make a difference. Completely arbitrary. Just different ways you'll have to code it.
– JustAFellowCoder
Mar 29 at 0:43