In a unittest, we have assertThrown average([1], [1, 2]));
As assert statement throws an exception.
But the unittest fails, which seems odd, as an assert did thr
Have I found another bug in DMD?
```
import std.stdio : writeln;
import std.exception : enforce, assertThrown, assertNotThrown;
void main()
{
auto result = average([], []);
// assert is not caught in catch block
// enforce is caught in catch block
try
{
result = average([1], [1, 2]);
}
catch (Exception e)
{
writeln("Caught exception: ", e.msg);
}
}
int[] average(int[] a, int[] b)
{
assert( a.length == b.length, "assert: Input slices must have
the same length"); // assert will not be caught in catch block
// enforce(a.length == b.length, "enforce: Input slices must
have the same length"); // enforce will be caught in catch
block
// Implementation goes here
return cast(int[])[]; // Initial result, so it compiles
}
unittest
{
/* Must throw for uneven slices */
assertThrown(average([1], [1, 2]));
/* Must not throw for empty slices */
assertNotThrown(average([], []));
}
```
Running it in Linux Terminal
```
bb@fedora:~/temp/c42_p217_6a_testing_for_exceptions$ dub test
--force # with assert only
No source files found in configuration 'library'.
Falling back to default configuration for test runner.
Starting Performing "unittest" build using /usr/bin/dmd for
x86_64.
Building c42_6a_testing_for_exceptions ~master: building
configuration [application]
Linking c42_6a_testing_for_exceptions
Running c42_6a_testing_for_exceptions
core.exception.AssertError@source/app.d(22): assert: Input
slices must have the same length
----------------
??:? _d_assert_msg [0x40301c]
source/app.d:22 int[] app.average(int[], int[]) [0x400d6e]
source/app.d:32 pure @safe int[]
app.__unittest_L29_C1().__dgliteral_L32_C22() [0x400e46]
/usr/include/dmd/phobos/std/exception.d:294 pure nothrow @safe
void std.exception.assertThrown!(Exception,
int[]).assertThrown(lazy int[], immutable(char)[],
immutable(char)[], ulong) [0x4025b2]
source/app.d:32 void app.__unittest_L29_C1() [0x400daf]
??:? void app.__modtest() [0x402cbc]
??:? int
core.runtime.runModuleUnitTests().__foreachbody_L603_C5(object.ModuleInfo*) [0x40c52e]
??:? int object.ModuleInfo.opApply(scope int
delegate(object.ModuleInfo*)).__lambda_L2519_C13(immutable(object.ModuleInfo*)) [0x40a087]
??:? int rt.minfo.moduleinfos_apply(scope int
delegate(immutable(object.ModuleInfo*))).__foreachbody_L585_C5(ref rt.sections_elf_shared.DSO) [0x412593]
??:? int rt.sections_elf_shared.DSO.opApply(scope int
delegate(ref rt.sections_elf_shared.DSO)) [0x412be5]
??:? int rt.minfo.moduleinfos_apply(scope int
delegate(immutable(object.ModuleInfo*))) [0x412521]
??:? int object.ModuleInfo.opApply(scope int
delegate(object.ModuleInfo*)) [0x40a059]
??:? runModuleUnitTests [0x40c363]
??:? void rt.dmain2._d_run_main2(char[][], ulong, extern (C) int
function(char[][])*).runAll() [0x403c0c]
??:? void rt.dmain2._d_run_main2(char[][], ulong, extern (C) int
function(char[][])*).tryExec(scope void delegate()) [0x403b99]
??:? _d_run_main2 [0x403b0f]
??:? _d_run_main [0x403917]
/usr/include/dmd/druntime/import/core/internal/entrypoint.d:29
main [0x400e99]
??:? [0x7f80e860f5b4]
??:? __libc_start_main [0x7f80e860f667]
??:? _start [0x400b64]
1/1 modules FAILED unittests
Error Program exited with code 1
```
