diff --git a/docs/make.jl b/docs/make.jl
index 142681d..578cdb5 100644
--- a/docs/make.jl
+++ b/docs/make.jl
@@ -16,6 +16,7 @@ makedocs(
         "index.md",
         "Manual" => "manual.md",
         "Library" => [
+            "Public" => "lib/public.md",
             "Graph" => "lib/internals/graph.md",
             "Node" => "lib/internals/node.md",
             "Task" => "lib/internals/task.md",
diff --git a/docs/src/lib/internals/properties.md b/docs/src/lib/internals/properties.md
new file mode 100644
index 0000000..5773020
--- /dev/null
+++ b/docs/src/lib/internals/properties.md
@@ -0,0 +1,22 @@
+# Properties
+
+## Type
+```@autodocs
+Modules = [MetagraphOptimization]
+Pages = ["properties/type.jl"]
+Order   = [:type]
+```
+
+## Create
+```@autodocs
+Modules = [MetagraphOptimization]
+Pages = ["task/create.jl"]
+Order   = [:function]
+```
+
+## Utility
+```@autodocs
+Modules = [MetagraphOptimization]
+Pages = ["properties/utility.jl"]
+Order   = [:function]
+```
diff --git a/examples/plot_chain.jl b/examples/plot_chain.jl
index 0298120..4e9cb1c 100644
--- a/examples/plot_chain.jl
+++ b/examples/plot_chain.jl
@@ -41,9 +41,9 @@ function gen_plot(filepath)
             i = i - 1
         end
 
-        props = graph_properties(g)
+        props = get_properties(g)
         push!(x, props.data)
-        push!(y, props.compute_effort)
+        push!(y, props.computeEffort)
     end
 
     println("\rDone.")
diff --git a/examples/plot_star.jl b/examples/plot_star.jl
index 2dca0a2..3f82fb5 100644
--- a/examples/plot_star.jl
+++ b/examples/plot_star.jl
@@ -44,9 +44,9 @@ function gen_plot(filepath)
 
 
 
-    props = graph_properties(g)
+    props = get_properties(g)
     x0 = props.data
-    y0 = props.compute_effort
+    y0 = props.computeEffort
 
     x = Vector{Float64}()
     y = Vector{Float64}()
@@ -55,9 +55,9 @@ function gen_plot(filepath)
     opt = get_operations(g)
     for op in opt.nodeFusions
         push_operation!(g, op)
-        props = graph_properties(g)
+        props = get_properties(g)
         push!(x, props.data)
-        push!(y, props.compute_effort)
+        push!(y, props.computeEffort)
         pop_operation!(g)
 
         push!(
@@ -65,15 +65,15 @@ function gen_plot(filepath)
             "NF: (" *
             string(props.data) *
             ", " *
-            string(props.compute_effort) *
+            string(props.computeEffort) *
             ")",
         )
     end
     for op in opt.nodeReductions
         push_operation!(g, op)
-        props = graph_properties(g)
+        props = get_properties(g)
         push!(x, props.data)
-        push!(y, props.compute_effort)
+        push!(y, props.computeEffort)
         pop_operation!(g)
 
         push!(
@@ -81,15 +81,15 @@ function gen_plot(filepath)
             "NR: (" *
             string(props.data) *
             ", " *
-            string(props.compute_effort) *
+            string(props.computeEffort) *
             ")",
         )
     end
     for op in opt.nodeSplits
         push_operation!(g, op)
-        props = graph_properties(g)
+        props = get_properties(g)
         push!(x, props.data)
-        push!(y, props.compute_effort)
+        push!(y, props.computeEffort)
         pop_operation!(g)
 
         push!(
@@ -97,7 +97,7 @@ function gen_plot(filepath)
             "NS: (" *
             string(props.data) *
             ", " *
-            string(props.compute_effort) *
+            string(props.computeEffort) *
             ")",
         )
     end
diff --git a/examples/profiling_utilities.jl b/examples/profiling_utilities.jl
index 0d14835..6aa7727 100644
--- a/examples/profiling_utilities.jl
+++ b/examples/profiling_utilities.jl
@@ -3,7 +3,7 @@ function test_random_walk(g::DAG, n::Int64)
     # the purpose here is to do "random" operations and reverse them again and validate that the graph stays the same and doesn't diverge
     reset_graph!(g)
 
-    properties = graph_properties(g)
+    properties = get_properties(g)
 
     for i in 1:n
         # choose push or pop
diff --git a/src/MetagraphOptimization.jl b/src/MetagraphOptimization.jl
index e4a0061..1e8c0c9 100644
--- a/src/MetagraphOptimization.jl
+++ b/src/MetagraphOptimization.jl
@@ -15,6 +15,8 @@ export AbstractComputeTask
 export AbstractDataTask
 export DataTask
 export FusedComputeTask
+export PossibleOperations
+export GraphProperties
 
 export make_node
 export make_edge
@@ -25,7 +27,7 @@ export is_exit_node
 export parents
 export children
 export compute
-export graph_properties
+export get_properties
 export get_exit_node
 export is_valid
 
@@ -55,6 +57,8 @@ export bytes_to_human_readable
 import Base.length
 import Base.show
 import Base.==
+import Base.+
+import Base.-
 import Base.in
 import Base.copy
 import Base.isempty
@@ -66,6 +70,7 @@ import Base.collect
 include("task/type.jl")
 include("node/type.jl")
 include("diff/type.jl")
+include("properties/type.jl")
 include("operation/type.jl")
 include("graph/type.jl")
 
@@ -96,6 +101,9 @@ include("operation/get.jl")
 include("operation/print.jl")
 include("operation/validate.jl")
 
+include("properties/create.jl")
+include("properties/utility.jl")
+
 include("task/create.jl")
 include("task/compare.jl")
 include("task/print.jl")
diff --git a/src/graph/print.jl b/src/graph/print.jl
index 729b14c..73df06c 100644
--- a/src/graph/print.jl
+++ b/src/graph/print.jl
@@ -58,12 +58,12 @@ function show(io::IO, graph::DAG)
     end
     println(io)
     println(io, "  Edges: ", noEdges)
-    properties = graph_properties(graph)
-    println(io, "  Total Compute Effort: ", properties.compute_effort)
+    properties = get_properties(graph)
+    println(io, "  Total Compute Effort: ", properties.computeEffort)
     println(io, "  Total Data Transfer: ", properties.data)
     return println(
         io,
         "  Total Compute Intensity: ",
-        properties.compute_intensity,
+        properties.computeIntensity,
     )
 end
diff --git a/src/graph/properties.jl b/src/graph/properties.jl
index ed5e985..211d8be 100644
--- a/src/graph/properties.jl
+++ b/src/graph/properties.jl
@@ -1,31 +1,17 @@
 """
-    graph_properties(graph::DAG)
+    get_properties(graph::DAG)
 
-Return the graph's properties, a named tuple with fields `.data`, `.compute_effort`, `.compute_intensity`, `.nodes` (number of nodes) and `.edges` (number of edges).
+Return the graph's [`GraphProperties`](@ref).
 """
-function graph_properties(graph::DAG)
+function get_properties(graph::DAG)
     # make sure the graph is fully generated
     apply_all!(graph)
 
-    d = 0
-    ce = 0
-    ed = 0
-    for node in graph.nodes
-        d += data(node.task) * length(node.parents)
-        ce += compute_effort(node.task)
-        ed += length(node.parents)
+    if (graph.properties.computeEffort == 0.0)
+        graph.properties = GraphProperties(graph)
     end
 
-    ci = ce / d
-
-    result = (
-        data = d,
-        compute_effort = ce,
-        compute_intensity = ci,
-        nodes = length(graph.nodes),
-        edges = ed,
-    )
-    return result
+    return graph.properties
 end
 
 """
diff --git a/src/graph/type.jl b/src/graph/type.jl
index f65c228..64ef860 100644
--- a/src/graph/type.jl
+++ b/src/graph/type.jl
@@ -41,6 +41,9 @@ mutable struct DAG
     # "snapshot" system: keep track of added/removed nodes/edges since last snapshot
     # these are muted in insert_node! etc.
     diff::Diff
+
+    # the cached properties of the DAG
+    properties::GraphProperties
 end
 
 """
@@ -69,5 +72,6 @@ function DAG()
         PossibleOperations(),
         Set{Node}(),
         Diff(),
+        GraphProperties(),
     )
 end
diff --git a/src/models/abc/parse.jl b/src/models/abc/parse.jl
index 9553dc2..d78b23b 100644
--- a/src/models/abc/parse.jl
+++ b/src/models/abc/parse.jl
@@ -195,6 +195,14 @@ function parse_abc(filename::String, verbose::Bool = false)
     #put all nodes into dirty nodes set
     graph.dirtyNodes = copy(graph.nodes)
 
+    if (verbose)
+        println("Generating the graph's properties")
+    end
+    graph.properties = GraphProperties(graph)
+
+    if (verbose)
+        println("Done")
+    end
     # don't actually need to read the edges
     return graph
 end
diff --git a/src/node/create.jl b/src/node/create.jl
index dd01d05..127f3c2 100644
--- a/src/node/create.jl
+++ b/src/node/create.jl
@@ -1,3 +1,43 @@
+
+DataTaskNode(t::AbstractDataTask) = DataTaskNode(
+    t,
+    Vector{Node}(),
+    Vector{Node}(),
+    UUIDs.uuid1(rng[threadid()]),
+    missing,
+    missing,
+    missing,
+)
+ComputeTaskNode(t::AbstractComputeTask) = ComputeTaskNode(
+    t,
+    Vector{Node}(),
+    Vector{Node}(),
+    UUIDs.uuid1(rng[threadid()]),
+    missing,
+    missing,
+    Vector{NodeFusion}(),
+)
+
+copy(m::Missing) = missing
+copy(n::ComputeTaskNode) = ComputeTaskNode(
+    copy(n.task),
+    copy(n.parents),
+    copy(n.children),
+    UUIDs.uuid1(rng[threadid()]),
+    copy(n.nodeReduction),
+    copy(n.nodeSplit),
+    copy(n.nodeFusions),
+)
+copy(n::DataTaskNode) = DataTaskNode(
+    copy(n.task),
+    copy(n.parents),
+    copy(n.children),
+    UUIDs.uuid1(rng[threadid()]),
+    copy(n.nodeReduction),
+    copy(n.nodeSplit),
+    copy(n.nodeFusion),
+)
+
 """
     make_node(t::AbstractTask)
 
diff --git a/src/node/properties.jl b/src/node/properties.jl
index 2edb400..b28a234 100644
--- a/src/node/properties.jl
+++ b/src/node/properties.jl
@@ -12,6 +12,18 @@ Return whether this node is an exit node of its graph, i.e., it has no parents.
 """
 is_exit_node(node::Node) = length(node.parents) == 0
 
+"""
+    data(edge::Edge)
+
+Return the data transfered by this edge, i.e., 0 if the child is a [`ComputeTaskNode`](@ref), otherwise the child's `data()`.
+"""
+function data(edge::Edge)
+    if typeof(edge.edge[1]) <: DataTaskNode
+        return data(edge.edge[1].task)
+    end
+    return 0.0
+end
+
 """
     children(node::Node)
 
diff --git a/src/node/type.jl b/src/node/type.jl
index db32f1b..e8a353a 100644
--- a/src/node/type.jl
+++ b/src/node/type.jl
@@ -81,25 +81,6 @@ mutable struct ComputeTaskNode <: Node
     nodeFusions::Vector{Operation}
 end
 
-DataTaskNode(t::AbstractDataTask) = DataTaskNode(
-    t,
-    Vector{Node}(),
-    Vector{Node}(),
-    UUIDs.uuid1(rng[threadid()]),
-    missing,
-    missing,
-    missing,
-)
-ComputeTaskNode(t::AbstractComputeTask) = ComputeTaskNode(
-    t,
-    Vector{Node}(),
-    Vector{Node}(),
-    UUIDs.uuid1(rng[threadid()]),
-    missing,
-    missing,
-    Vector{NodeFusion}(),
-)
-
 """
     Edge
 
@@ -116,23 +97,3 @@ struct Edge
         Tuple{ComputeTaskNode, DataTaskNode},
     }
 end
-
-copy(m::Missing) = missing
-copy(n::ComputeTaskNode) = ComputeTaskNode(
-    copy(n.task),
-    copy(n.parents),
-    copy(n.children),
-    UUIDs.uuid1(rng[threadid()]),
-    copy(n.nodeReduction),
-    copy(n.nodeSplit),
-    copy(n.nodeFusions),
-)
-copy(n::DataTaskNode) = DataTaskNode(
-    copy(n.task),
-    copy(n.parents),
-    copy(n.children),
-    UUIDs.uuid1(rng[threadid()]),
-    copy(n.nodeReduction),
-    copy(n.nodeSplit),
-    copy(n.nodeFusion),
-)
diff --git a/src/operation/apply.jl b/src/operation/apply.jl
index 6230322..b6da322 100644
--- a/src/operation/apply.jl
+++ b/src/operation/apply.jl
@@ -40,6 +40,9 @@ function apply_operation!(graph::DAG, operation::NodeFusion)
         operation.input[2],
         operation.input[3],
     )
+
+    graph.properties += GraphProperties(diff)
+
     return AppliedNodeFusion(operation, diff)
 end
 
@@ -52,6 +55,9 @@ Return an [`AppliedNodeReduction`](@ref) object generated from the graph's [`Dif
 """
 function apply_operation!(graph::DAG, operation::NodeReduction)
     diff = node_reduction!(graph, operation.input)
+
+    graph.properties += GraphProperties(diff)
+
     return AppliedNodeReduction(operation, diff)
 end
 
@@ -64,6 +70,9 @@ Return an [`AppliedNodeSplit`](@ref) object generated from the graph's [`Diff`](
 """
 function apply_operation!(graph::DAG, operation::NodeSplit)
     diff = node_split!(graph, operation.input)
+
+    graph.properties += GraphProperties(diff)
+
     return AppliedNodeSplit(operation, diff)
 end
 
@@ -127,6 +136,9 @@ function revert_diff!(graph::DAG, diff::Diff)
     for edge in diff.removedEdges
         insert_edge!(graph, edge.edge[1], edge.edge[2], false)
     end
+
+    graph.properties -= GraphProperties(diff)
+
     return nothing
 end
 
diff --git a/src/properties/create.jl b/src/properties/create.jl
new file mode 100644
index 0000000..6db46f4
--- /dev/null
+++ b/src/properties/create.jl
@@ -0,0 +1,73 @@
+"""
+   GraphProperties()
+
+Create an empty [`GraphProperties`](@ref) object.
+"""
+function GraphProperties()
+    return (
+        data = 0.0,
+        computeEffort = 0.0,
+        computeIntensity = 0.0,
+        cost = 0.0,
+        noNodes = 0,
+        noEdges = 0,
+    )::GraphProperties
+end
+
+"""
+   GraphProperties(graph::DAG)
+
+Calculate the graph's properties and return the constructed [`GraphProperties`](@ref) object.
+"""
+function GraphProperties(graph::DAG)
+    # make sure the graph is fully generated
+    apply_all!(graph)
+
+    d = 0.0
+    ce = 0.0
+    ed = 0
+    for node in graph.nodes
+        d += data(node.task) * length(node.parents)
+        ce += compute_effort(node.task)
+        ed += length(node.parents)
+    end
+
+    return (
+        data = d,
+        computeEffort = ce,
+        computeIntensity = (d == 0) ? 0.0 : ce / d,
+        cost = 0.0, # TODO
+        noNodes = length(graph.nodes),
+        noEdges = ed,
+    )::GraphProperties
+end
+
+"""
+   GraphProperties(diff::Diff)
+
+Create the graph properties difference from a given [`Diff`](@ref).
+The graph's properties after applying the [`Diff`](@ref) will be `get_properties(graph) + GraphProperties(diff)`.
+For reverting a diff, it's `get_properties(graph) - GraphProperties(diff)`.
+"""
+function GraphProperties(diff::Diff)
+    d = 0.0
+    ce = 0.0
+    c = 0.0 # TODO
+
+    ce =
+        reduce(+, compute_effort(n.task) for n in diff.addedNodes; init = 0.0) -
+        reduce(+, compute_effort(n.task) for n in diff.removedNodes; init = 0.0)
+
+    d =
+        reduce(+, data(e) for e in diff.addedEdges; init = 0.0) -
+        reduce(+, data(e) for e in diff.removedEdges; init = 0.0)
+
+    return (
+        data = d,
+        computeEffort = ce,
+        computeIntensity = (d == 0) ? 0.0 : ce / d,
+        cost = c,
+        noNodes = length(diff.addedNodes) - length(diff.removedNodes),
+        noEdges = length(diff.addedEdges) - length(diff.removedEdges),
+    )::GraphProperties
+end
diff --git a/src/properties/type.jl b/src/properties/type.jl
new file mode 100644
index 0000000..084486c
--- /dev/null
+++ b/src/properties/type.jl
@@ -0,0 +1,17 @@
+"""
+   GraphProperties
+
+Representation of a [`DAG`](@ref)'s properties.
+
+# Fields:
+`.data`: The total data transfer.\\
+`.computeEffort`: The total compute effort.\\
+`.computeIntensity`: The compute intensity, will always equal `.computeEffort / .data`.\\
+`.cost`: The estimated cost.\\
+`.noNodes`: Number of [`Node`](@ref)s.\\
+`.noEdges`: Number of [`Edge`](@ref)s.
+"""
+const GraphProperties = NamedTuple{
+    (:data, :computeEffort, :computeIntensity, :cost, :noNodes, :noEdges),
+    Tuple{Float64, Float64, Float64, Float64, Int, Int},
+}
diff --git a/src/properties/utility.jl b/src/properties/utility.jl
new file mode 100644
index 0000000..bf936db
--- /dev/null
+++ b/src/properties/utility.jl
@@ -0,0 +1,59 @@
+"""
+    -(prop1::GraphProperties, prop2::GraphProperties)
+
+Subtract `prop1` from `prop2` and return the result as a new [`GraphProperties`](@ref).
+Also take care to keep consistent compute intensity.
+"""
+function -(prop1::GraphProperties, prop2::GraphProperties)
+    return (
+        data = prop1.data - prop2.data,
+        computeEffort = prop1.computeEffort - prop2.computeEffort,
+        computeIntensity = if (prop1.data - prop2.data == 0)
+            0.0
+        else
+            (prop1.computeEffort - prop2.computeEffort) /
+            (prop1.data - prop2.data)
+        end,
+        cost = prop1.cost - prop2.cost,
+        noNodes = prop1.noNodes - prop2.noNodes,
+        noEdges = prop1.noEdges - prop2.noEdges,
+    )::GraphProperties
+end
+
+"""
+    +(prop1::GraphProperties, prop2::GraphProperties)
+
+Add `prop1` and `prop2` and return the result as a new [`GraphProperties`](@ref).
+Also take care to keep consistent compute intensity.
+"""
+function +(prop1::GraphProperties, prop2::GraphProperties)
+    return (
+        data = prop1.data + prop2.data,
+        computeEffort = prop1.computeEffort + prop2.computeEffort,
+        computeIntensity = if (prop1.data + prop2.data == 0)
+            0.0
+        else
+            (prop1.computeEffort + prop2.computeEffort) /
+            (prop1.data + prop2.data)
+        end,
+        cost = prop1.cost + prop2.cost,
+        noNodes = prop1.noNodes + prop2.noNodes,
+        noEdges = prop1.noEdges + prop2.noEdges,
+    )::GraphProperties
+end
+
+"""
+    -(prop::GraphProperties)
+
+Unary negation of the graph properties. `.computeIntensity` will not be negated because `.data` and `.computeEffort` both are.
+"""
+function -(prop::GraphProperties)
+    return (
+        data = -prop.data,
+        computeEffort = -prop.computeEffort,
+        computeIntensity = prop.computeIntensity,   # no negation here!
+        cost = -prop.cost,
+        noNodes = -prop.noNodes,
+        noEdges = -prop.noEdges,
+    )::GraphProperties
+end
diff --git a/test/known_graphs.jl b/test/known_graphs.jl
index cbbb5a1..de81c12 100644
--- a/test/known_graphs.jl
+++ b/test/known_graphs.jl
@@ -3,7 +3,7 @@ using Random
 function test_known_graph(name::String, n, fusion_test = true)
     @testset "Test $name Graph ($n)" begin
         graph = parse_abc(joinpath(@__DIR__, "..", "input", "$name.txt"))
-        props = graph_properties(graph)
+        props = get_properties(graph)
 
         if (fusion_test)
             test_node_fusion(graph)
@@ -14,13 +14,13 @@ end
 
 function test_node_fusion(g::DAG)
     @testset "Test Node Fusion" begin
-        props = graph_properties(g)
+        props = get_properties(g)
 
         options = get_operations(g)
 
         nodes_number = length(g.nodes)
         data = props.data
-        compute_effort = props.compute_effort
+        compute_effort = props.computeEffort
 
         while !isempty(options.nodeFusions)
             fusion = first(options.nodeFusions)
@@ -29,13 +29,13 @@ function test_node_fusion(g::DAG)
 
             push_operation!(g, fusion)
 
-            props = graph_properties(g)
+            props = get_properties(g)
             @test props.data < data
-            @test props.compute_effort == compute_effort
+            @test props.computeEffort == compute_effort
 
             nodes_number = length(g.nodes)
             data = props.data
-            compute_effort = props.compute_effort
+            compute_effort = props.computeEffort
 
             options = get_operations(g)
         end
@@ -49,7 +49,7 @@ function test_random_walk(g::DAG, n::Int64)
 
         @test is_valid(g)
 
-        properties = graph_properties(g)
+        properties = get_properties(g)
 
         for i in 1:n
             # choose push or pop
@@ -82,7 +82,7 @@ function test_random_walk(g::DAG, n::Int64)
 
         @test is_valid(g)
 
-        @test properties == graph_properties(g)
+        @test properties == get_properties(g)
     end
 end
 
diff --git a/test/runtests.jl b/test/runtests.jl
index 74f7f81..2ea1a76 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -5,6 +5,7 @@ using Test
     include("unit_tests_utility.jl")
     include("unit_tests_tasks.jl")
     include("unit_tests_nodes.jl")
+    include("unit_tests_properties.jl")
     include("node_reduction.jl")
     include("unit_tests_graph.jl")
 
diff --git a/test/unit_tests_graph.jl b/test/unit_tests_graph.jl
index 32efa11..77dd84c 100644
--- a/test/unit_tests_graph.jl
+++ b/test/unit_tests_graph.jl
@@ -69,7 +69,7 @@ import MetagraphOptimization.partners
     @test length(graph.nodes) == 26
     @test length(graph.dirtyNodes) == 26
 
-    # now for all the edgese
+    # now for all the edges
     insert_edge!(graph, d_PB, PB, false)
     insert_edge!(graph, d_PA, PA, false)
     insert_edge!(graph, d_PBp, PBp, false)
@@ -142,12 +142,12 @@ import MetagraphOptimization.partners
     @test operations == get_operations(graph)
     nf = first(operations.nodeFusions)
 
-    properties = graph_properties(graph)
-    @test properties.compute_effort == 134
+    properties = get_properties(graph)
+    @test properties.computeEffort == 134
     @test properties.data == 62
-    @test properties.compute_intensity ≈ 134 / 62
-    @test properties.nodes == 26
-    @test properties.edges == 25
+    @test properties.computeIntensity ≈ 134 / 62
+    @test properties.noNodes == 26
+    @test properties.noEdges == 25
 
     push_operation!(graph, nf)
     # **does not immediately apply the operation**
@@ -161,17 +161,17 @@ import MetagraphOptimization.partners
           (addedNodes = 0, removedNodes = 0, addedEdges = 0, removedEdges = 0)
 
     # this applies pending operations
-    properties = graph_properties(graph)
+    properties = get_properties(graph)
 
     @test length(graph.nodes) == 24
     @test length(graph.appliedOperations) == 1
     @test length(graph.operationsToApply) == 0
     @test length(graph.dirtyNodes) != 0
-    @test properties.nodes == 24
-    @test properties.edges == 23
-    @test properties.compute_effort == 134
+    @test properties.noNodes == 24
+    @test properties.noEdges == 23
+    @test properties.computeEffort == 134
     @test properties.data < 62
-    @test properties.compute_intensity > 134 / 62
+    @test properties.computeIntensity > 134 / 62
 
     operations = get_operations(graph)
     @test length(graph.dirtyNodes) == 0
@@ -205,12 +205,12 @@ import MetagraphOptimization.partners
     @test length(graph.appliedOperations) == 0
     @test length(graph.operationsToApply) == 0
 
-    properties = graph_properties(graph)
-    @test properties.nodes == 26
-    @test properties.edges == 25
-    @test properties.compute_effort == 134
+    properties = get_properties(graph)
+    @test properties.noNodes == 26
+    @test properties.noEdges == 25
+    @test properties.computeEffort == 134
     @test properties.data == 62
-    @test properties.compute_intensity ≈ 134 / 62
+    @test properties.computeIntensity ≈ 134 / 62
 
     operations = get_operations(graph)
     @test length(operations) ==
diff --git a/test/unit_tests_properties.jl b/test/unit_tests_properties.jl
new file mode 100644
index 0000000..97a53ad
--- /dev/null
+++ b/test/unit_tests_properties.jl
@@ -0,0 +1,52 @@
+
+@testset "GraphProperties Unit Tests" begin
+    prop = GraphProperties()
+
+    @test prop.data == 0.0
+    @test prop.computeEffort == 0.0
+    @test prop.computeIntensity == 0.0
+    @test prop.cost == 0.0
+    @test prop.noNodes == 0.0
+    @test prop.noEdges == 0.0
+
+    prop2 = (
+        data = 5.0,
+        computeEffort = 6.0,
+        computeIntensity = 6.0 / 5.0,
+        cost = 0.0,
+        noNodes = 2,
+        noEdges = 3,
+    )::GraphProperties
+
+    @test prop + prop2 == prop2
+    @test prop2 - prop == prop2
+
+    negProp = -prop2
+    @test negProp.data == -5.0
+    @test negProp.computeEffort == -6.0
+    @test negProp.computeIntensity == 6.0 / 5.0
+    @test negProp.cost == 0.0
+    @test negProp.noNodes == -2
+    @test negProp.noEdges == -3
+
+    @test negProp + prop2 == GraphProperties()
+
+    prop3 = (
+        data = 7.0,
+        computeEffort = 3.0,
+        computeIntensity = 7.0 / 3.0,
+        cost = 0.0,
+        noNodes = -3,
+        noEdges = 2,
+    )::GraphProperties
+
+    propSum = prop2 + prop3
+
+    @test propSum.data == 12.0
+    @test propSum.computeEffort == 9.0
+    @test propSum.computeIntensity == 9.0 / 12.0
+    @test propSum.cost == 0.0
+    @test propSum.noNodes == -1
+    @test propSum.noEdges == 5
+end
+println("GraphProperties Unit Tests Complete!")