Update

Author: odow

src/Bridges/Constraint/bridges/ScalarSlackBridge.jl

@@ -55,7 +55,7 @@ function MOI.get(
     # that the original set was the same as the slacked set.
     return error(
         "Internal error: this method should never be called because it " *
-        "represents and invalid state. Please open an issue to report.",
+        "represents an invalid state. Please open an issue to report.",
     )
 end
 
@@ -68,7 +68,7 @@ function MOI.get(
     # that the original set was the same as the slacked set.
     return error(
         "Internal error: this method should never be called because it " *
-        "represents and invalid state. Please open an issue to report.",
+        "represents an invalid state. Please open an issue to report.",
     )
 end
 

test/Bridges/Constraint/ScalarSlackBridge.jl

@@ -426,6 +426,30 @@ function test_basis_status()
     return
 end
 
+function test_internal_error()
+    F, S = MOI.ScalarAffineFunction{Float64},MOI.EqualTo{Float64}
+    BT = MOI.Bridges.Constraint.ScalarSlackBridge{Float64,F,S}
+    model = MOI.Utilities.Model{Float64}()
+    x = MOI.add_variable(model)
+    set = MOI.EqualTo(1.0)
+    bridge = MOI.Bridges.Constraint.bridge_constraint(BT, model, 1.0 * x, set)
+    @test_throws(
+        ErrorException(
+            "Internal error: this method should never be called because it " *
+            "represents an invalid state. Please open an issue to report.",
+        ),
+        MOI.get(bridge, MOI.NumberOfConstraints{MOI.VariableIndex,S}()),
+    )
+    @test_throws(
+        ErrorException(
+            "Internal error: this method should never be called because it " *
+            "represents an invalid state. Please open an issue to report.",
+        ),
+        MOI.get(bridge, MOI.ListOfConstraintIndices{MOI.VariableIndex,S}()),
+    )
+    return
+end
+
 end  # module
 
 TestConstraintSlack.runtests()