fix tests

Author: dehann

src/DataBlobs/services/BlobEntry.jl

@@ -125,7 +125,7 @@ Also see: [`getBlobEntry`](@ref), [`addBlob!`](@ref), [`mergeBlobEntries!`](@ref
 function addBlobEntry!(
     var::AbstractDFGVariable, 
     entry::BlobEntry;
-    blobId::UUID = (isnothing(entry.blobId) ? entry.id : entry.blobId),
+    blobId::Union{UUID,Nothing} = (isnothing(entry.blobId) ? entry.id : entry.blobId),
     blobSize::Int = (hasfield(BlobEntry, :size) ? entry.size : -1)
 )
     # see https://github.com/JuliaRobotics/DistributedFactorGraphs.jl/issues/985

test/iifInterfaceTests.jl

@@ -253,8 +253,8 @@ end
     #get
     @test deepcopy(de1) == getBlobEntry(v1, :key1)
     @test deepcopy(de2) == getBlobEntry(dfg, :a, :key2)
-    @test_throws ErrorException getBlobEntry(v2, :key1)
-    @test_throws ErrorException getBlobEntry(dfg, :b, :key1)
+    @test_throws KeyError getBlobEntry(v2, :key1)
+    @test_throws KeyError getBlobEntry(dfg, :b, :key1)
 
     #update
     @test updateBlobEntry!(dfg, :a, de2_update) == de2_update