Question:
There is a test task:
Given a view file
operand1;operand2;operation;result operand1;operand2;operation;result operand1;operand2;operation;result operand1;operand2;operation;result
Each line describes an arithmetic operation.
operand1 and operand2 – operands, integers
operation – arithmetic operation + – / *
result – result of operation operation on operand1 and operand2
The file can contain any field values
Required
- Implement JUnit tests for arithmetic operations.
- Each action should appear in the report as a separate test case
End of the quest
I understand how to write JUnit tests, but I don't understand what exactly is being tested in this case.
Am I right in thinking that you need to first write a code that parses variables, 4 functions for different arithmetic operations, and then use JUnit to check the correctness of the functions based on test equalities in the file?
I ask you to express your understanding of the problem.
Answer:
I would write a script (although if there are several lines, then it is possible with pens), which, based on the source file, will generate a Java file with tests. That is, for each line of the source file, it will generate something like
@Test
public void test1() {
int actual = operand1 operationoperand2;
int expect = result;
assertEquals(expect , actual);
}
well, of course, a few lines of "binding" for all this, so that the module would be "compiled".
In a more sophisticated way, I would add a check to 0 for operand2 if operation is / .
UPD
Here on my knees in perl to do in 5 minutes, for an interview I consider it the most
#!/usr/bin/perl
use strict;
use warnings;
print '
import junit.framework.*;
public class JavaTest extends TestCase {
protected void setUp(){
}
';
my $i = 1;
while (my $line = <>) {
chomp $line;
my ($op1, $op2, $oper, $result) = split /;/, $line;
print <<"ONE_TEST";
\@Test
public void test$i() {
int actual = $op1 $oper $op2;
int expect = $result;
assertEquals(expect, actual);
}
ONE_TEST
$i += 1;
}
print "}\n";