public void HasCount_WithNonEmptyEnumerableAndLesserCount_ExpectsFalse()
 => False(ENMRBL_NON_EMPTY.HasCount(COUNT_LESSER));
 public void HasCount_WithNonEmptyEnumerableAndGreaterCount_ExpectsFalse()
 => False(ENMRBL_NON_EMPTY.HasCount(COUNT_GREATER));
 public void HasCount_WithNonEmptyEnumerableAndEmptyCount_ExpectsFalse()
 => False(ENMRBL_NON_EMPTY.HasCount(0));
 public void HasCount_WithNonEmptyEnumerableAndRightCount_ExpectsTrue()
 => True(ENMRBL_NON_EMPTY.HasCount(COUNT_RIGHT));
 public void HasCount_WithNonEmptyEnumerableAndNegativeCount_Throws()
 => Throws <ArgumentOutOfRangeException>(
     () => ENMRBL_NON_EMPTY.HasCount(-COUNT_ANY));