rename methods with capital... Test Output...
...letter as first character

...Test Output unaltered

$ java -ea FractionTest
FractionTest tests verbose output:
test "Divide by zero: that 1/0 should throw an IllegalArgumentException exception" passes.

test ".equal method: that 1/2 .equals 1/2" passes.

test ".equal method: that 1/2 equals 3/6" passes.

test ".equal method: that -1/2 equals 1/-2" passes.

test ".equal method: that -1/-2 equals 1/2" passes.

test ".equal method: that 4/-8 does not equal 1/2" passes.

test "Multiply: that multiplying 1/2 by 3/5 gives 3/10" passes.

test "Divide: that (2/9) / (3/5) gives 10/27" passes.

test "Divide by zero: that (1/1) / (0/1) should throw an IllegalArgumentException exception" passes.

test "Add: that 1/2 + 1/4 gives 3/4" passes.

test "Add: that 2/9 + 3/5 gives 37/45" passes.

test "Subtract: that 2/9 - 3/5 gives -17/45" passes.

test "absValue: that absValue(-7/9) = 7/9" passes.

test "negate: that negate(7/9) = -7/9" passes.

test ".toString(): that (6/5).toString() is equal to "6/5" " passes.

test ".toString(): that (6/1).toString() is equal to "6" " passes.

test ".toString(): that (-1/4).toString() is equal to "-1/4" " passes.

test ".toString(): that (1/-4).toString() is equal to "-1/4" " passes.

FractionTest: All tests pass
Implement abs... Test output...
test that aB is recognized.

...Test output looks fine:

$ java -ea FractionCalculatorTest
FractionTestCalculator tests verbose output:
test "Simple parsing and operation: input of '1/2 * 3/4' should give '3/8'. Actually '3/8' is output." passes.

test "Simple parsing and operation: input of '1/2 / 3/4' should give '2/3'. Actually '2/3' is output." passes.

test "Simple parsing and operation: input of ' 1/2   +  -1/4 ' should give '1/4'. Actually '1/4' is output." passes.

test "Simple parsing and operation: input of '1/2 - 3/4' should give '-1/4'. Actually '-1/4' is output." passes.

test "Whole numbers: input of '3 * 9' should give '27'. Actually '27' is output." passes.

test "Abs: input of '-3 * 2/3 aB' should give '-2'. Actually '-2' is output." passes.

test "Invalid input no space: input of '1/2+1/2' should produce an ERROR. Actually '
ERROR unrecognized input '1/2+1/2' cannot process this
	Resetting calculator to its initial state (no operator and 0 as value)' is output." passes.

test "Invalid input two operators : input of '1/2 + - 3/4' should produce an ERROR. Actually '
ERROR you have input two operators: + and -.
	Resetting calculator to its initial state (no operator and 0 as value)' is output." passes.

test "Entering an invalid fraction input of '1/0' should produce an ERROR. Actually '
ERROR you have specified a fraction 1/0 with a zero denominator.
	Resetting calculator to its initial state (no operator and 0 as value)' is output." passes.

test "Try to divide by zero '1/2 / 0/3' should produce an ERROR. Actually '
ERROR you cannot divide by zero.
	Resetting calculator to its initial state (no operator and 0 as value)' is output." passes.

FractionCalculatorTest: All tests pass