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added a new test of infeas. prob. with 2 constraints #159

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Merged
merged 5 commits into from
Nov 3, 2017
Merged

added a new test of infeas. prob. with 2 constraints #159

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8021b70
added a new test of infeas. prob. with 2 constraints
IssamT Nov 2, 2017
5b01004
updated linear12test
IssamT Nov 2, 2017
07e2c1e
minor fix
IssamT Nov 2, 2017
be267c8
fixes some errors
IssamT Nov 2, 2017
401c4e2
using atol outside of its purpose.
IssamT Nov 3, 2017
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45 changes: 45 additions & 0 deletions test/contlinear.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -1063,6 +1063,50 @@ function linear11test(solver::MOI.AbstractSolver; atol=Base.rtoldefault(Float64)
end
end

function linear12test(solver::MOI.AbstractSolver; atol=Base.rtoldefault(Float64), rtol=Base.rtoldefault(Float64))
@testset "test infeasible problem with 2 linear constraints" begin
# min x
# s.t. 2x-3y <= -7
# y <= 2
# x,y >= 0
@test MOI.supportsproblem(solver, MOI.ScalarAffineFunction{Float64}, [(MOI.ScalarAffineFunction{Float64},MOI.GreaterThan{Float64}),(MOI.SingleVariable,MOI.GreaterThan{Float64})])

m = MOI.SolverInstance(solver)
x = MOI.addvariable!(m)
y = MOI.addvariable!(m)
c1 = MOI.addconstraint!(m, MOI.ScalarAffineFunction([x,y], [2.0,-3.0], 0.0), MOI.LessThan(-7.0))
c2 = MOI.addconstraint!(m, MOI.ScalarAffineFunction([y], [1.0], 0.0), MOI.LessThan(2.0))
bndx = MOI.addconstraint!(m, MOI.SingleVariable(x), MOI.GreaterThan(0.0))
bndy = MOI.addconstraint!(m, MOI.SingleVariable(y), MOI.GreaterThan(0.0))
MOI.set!(m, MOI.ObjectiveFunction(), MOI.ScalarAffineFunction([x], [1.0], 0.0))
MOI.set!(m, MOI.ObjectiveSense(), MOI.MinSense)
MOI.optimize!(m)

@test MOI.canget(m, MOI.ResultCount())
if MOI.get(m, MOI.ResultCount()) >= 1
# solver returned an infeasibility ray
@test MOI.get(m, MOI.TerminationStatus()) == MOI.Success
@test MOI.get(m, MOI.DualStatus()) == MOI.InfeasibilityCertificate
@test MOI.canget(m, MOI.ConstraintDual(), c1)
cd1 = MOI.get(m, MOI.ConstraintDual(), c1)
cd2 = MOI.get(m, MOI.ConstraintDual(), c2)
bndxd = MOI.get(m, MOI.ConstraintDual(), bndx)
bndyd = MOI.get(m, MOI.ConstraintDual(), bndy)
@test cd1 < - atol
@test cd2 < - atol
@test - 3 * cd1 + cd2 ≈ -bndyd atol=atol rtol=rtol
@test 2 * cd1 ≈ -bndxd atol=atol rtol=rtol
@test -7 * cd1 + 2 * cd2 > atol
else
# solver returned nothing
@test MOI.get(m, MOI.ResultCount()) == 0
@test MOI.canget(m, MOI.PrimalStatus(1)) == false
@test MOI.get(m, MOI.TerminationStatus()) == MOI.InfeasibleNoResult ||
MOI.get(m, MOI.TerminationStatus()) == MOI.InfeasibleOrUnbounded
end
end
end

function contlineartest(solver::MOI.AbstractSolver; atol=Base.rtoldefault(Float64), rtol=Base.rtoldefault(Float64))
linear1test(solver, atol=atol, rtol=rtol)
linear2test(solver, atol=atol, rtol=rtol)
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You should add linear12test in this function

Expand All @@ -1075,4 +1119,5 @@ function contlineartest(solver::MOI.AbstractSolver; atol=Base.rtoldefault(Float6
linear9test(solver, atol=atol, rtol=rtol)
linear10test(solver, atol=atol, rtol=rtol)
linear11test(solver, atol=atol, rtol=rtol)
linear12test(solver, atol=atol, rtol=rtol)
end