Debug output during automation tests

I am trying to debug the following unit test for a 2D TArray-based class (MatrixRmn).

Something is wrong with my maths in this particular method, however debugging using break points in Visual Studio is a lesson in frustration, due to how Watching values cannot use an operator, leading to a series of lines looking like: PreReduced.operator.operator

I have tried logging values, however I cannot see anything in my logs when running the test in the editor! (Session Frontend → Automation → Start Tests).

bool MatrixRmnSolve::RunTest(const FString& Parameters)
{
	MatrixRmn PreReduced = MatrixRmn(4, 3);
	MatrixRmn ExpectedReduced = MatrixRmn(4, 3);

	PreReduced[0][0] = 1;
	PreReduced[0][1] = 2;
	PreReduced[0][2] = -2;
	PreReduced[1][0] = 2;
	PreReduced[1][1] = 3;
	PreReduced[1][2] = 0;
	PreReduced[2][0] = -1;
	PreReduced[2][1] = -1;
	PreReduced[2][2] = -3;
	PreReduced[3][0] = -4;
	PreReduced[3][1] = -11;
	PreReduced[3][2] = 22;

	ExpectedReduced[0][0] = 1;
	ExpectedReduced[0][1] = 0;
	ExpectedReduced[0][2] = 0;
	ExpectedReduced[1][0] = 0;
	ExpectedReduced[1][1] = 1;
	ExpectedReduced[1][2] = 0;
	ExpectedReduced[2][0] = 0;
	ExpectedReduced[2][1] = 0;
	ExpectedReduced[2][2] = 1;
	ExpectedReduced[3][0] = -8;
	ExpectedReduced[3][1] = 1;
	ExpectedReduced[3][2] = -2;

	MatrixRmn TestReduced = MatrixRmn(PreReduced);
	TestReduced.ConvertToRowEchelonForm();

	UE_LOG(LogTemp, Log, TEXT("TestReduced value is BLAH")); //, FString(TestReduced)
	//UE_LOG(LogTemp, Log, TEXT("ExpectedReduced value is %s"), FString(ExpectedReduced));

	TestEqual("ConvertToRowEchelonForm", TestReduced, ExpectedReduced);

	return true;
}

Figured out, looking at the wrong log…

I should have been looking at Session Frontend → Console, not Window->Developer Tools->Output Log.