Update README and tests.

Author: samuelsonric

README.md

@@ -10,7 +10,9 @@ The `sdplib` directory contains three semidefinite programming problems from the
 ```julia-repl
 julia> using FileIO, LinearAlgebra, JuMP
 
-julia> import MathOptChordalDecomposition, MosekTools, Mosek
+julia> import MosekTools, Mosek
+
+julia> import MathOptChordalDecomposition as MOCD
 
 julia> function construct_model(f, name::String)
            # load data
@@ -39,20 +41,18 @@ julia> model = construct_model(Mosek.Optimizer, "mcp124-1");
 julia> @time JuMP.optimize!(model)
   6.005076 seconds (2.53 k allocations: 515.859 KiB)
 
-julia> MOI.get(model, MOI.ObjectiveValue())
+julia> objective_value(model)
 141.9904770422396
 ```
 
 Solve the problem using [Mosek.jl](https://github.com/MOSEK/Mosek.jl) and MathOptChordalDecomposition.jl.
 
 ```julia-repl
-julia> model = construct_model("mcp124-1") do
-           MathOptChordalDecomposition.Optimizer(Mosek.Optimizer)
-       end;
+julia> model = construct_model(() -> MOCD.Optimizer(Mosek.Optimizer), "mcp124-1");
 
 julia> @time JuMP.optimize!(model)
   0.041175 seconds (230.72 k allocations: 11.800 MiB)
 
-julia> MOI.get(model.moi_backend.optimizer.model.inner, MOI.ObjectiveValue())
+julia> objective_value(model)
 141.99047611570586
 ```

test/runtests.jl

@@ -3,7 +3,7 @@ using LinearAlgebra
 using JuMP
 using Test
 
-import MathOptChordalDecomposition
+import MathOptChordalDecomposition as MOCD
 import Mosek
 import MosekTools
 
@@ -25,29 +25,29 @@ function construct_model(f, name::String)
 end
 
 model = construct_model("mcp124-1") do
-    MathOptChordalDecomposition.Optimizer(Mosek.Optimizer)
+    MOCD.Optimizer(Mosek.Optimizer)
 end
 
 JuMP.optimize!(model)
-@test round(MOI.get(model.moi_backend.optimizer.model.inner, MOI.ObjectiveValue()); digits = 2) == 141.99
+@test round(objective_value(model); digits = 2) == 141.99
 
 model = construct_model("mcp124-2") do
-    MathOptChordalDecomposition.Optimizer(Mosek.Optimizer)
+    MOCD.Optimizer(Mosek.Optimizer)
 end
 
 JuMP.optimize!(model)
-@test round(MOI.get(model.moi_backend.optimizer.model.inner, MOI.ObjectiveValue()); digits = 2) == 269.88
+@test round(objective_value(model); digits = 2) == 269.88
 
 model = construct_model("mcp124-3") do
-    MathOptChordalDecomposition.Optimizer(Mosek.Optimizer)
+    MOCD.Optimizer(Mosek.Optimizer)
 end
 
 JuMP.optimize!(model)
-@test round(MOI.get(model.moi_backend.optimizer.model.inner, MOI.ObjectiveValue()); digits = 2) == 467.75
+@test round(objective_value(model); digits = 2) == 467.75
 
 model = construct_model("mcp124-4") do
-    MathOptChordalDecomposition.Optimizer(Mosek.Optimizer)
+    MOCD.Optimizer(Mosek.Optimizer)
 end
 
 JuMP.optimize!(model)
-@test round(MOI.get(model.moi_backend.optimizer.model.inner, MOI.ObjectiveValue()); digits = 2) == 864.41
+@test round(objective_value(model); digits = 2) == 864.41