287 lines
12 KiB
Elixir
287 lines
12 KiB
Elixir
defmodule RDF.DescriptionTest do
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use ExUnit.Case
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defmodule EX, do:
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use RDF.Vocabulary, base_uri: "http://example.com/description/"
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doctest RDF.Description
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alias RDF.Description
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import RDF, only: [uri: 1, literal: 1, bnode: 1]
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def description, do: Description.new(EX.Subject)
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def description(content), do: Description.add(description(), content)
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def description_of_subject(%Description{subject: subject}, subject), do: true
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def description_of_subject(_, _), do: false
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def empty_description(%Description{predications: predications}) do
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predications == %{}
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end
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def description_includes_predication(desc, {predicate, object}) do
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desc.predications
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|> Map.get(predicate, %{})
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|> Enum.member?({object, nil})
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end
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describe "creating an empty description" do
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test "with a subject URI" do
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assert description_of_subject(Description.new(URI.parse("http://example.com/description/subject")),
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URI.parse("http://example.com/description/subject"))
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end
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test "with a raw subject URI string" do
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assert description_of_subject(Description.new("http://example.com/description/subject"),
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URI.parse("http://example.com/description/subject"))
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end
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test "with an unresolved subject URI term atom" do
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assert description_of_subject(Description.new(EX.Bar), uri(EX.Bar))
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end
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test "with a BlankNode subject" do
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assert description_of_subject(Description.new(bnode(:foo)), bnode(:foo))
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end
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end
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test "creating a description with a single initial triple" do
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desc = Description.new({EX.Subject, EX.predicate, EX.Object})
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assert description_of_subject(desc, uri(EX.Subject))
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assert description_includes_predication(desc, {EX.predicate, uri(EX.Object)})
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desc = Description.new(EX.Subject, EX.predicate, 42)
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assert description_of_subject(desc, uri(EX.Subject))
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assert description_includes_predication(desc, {EX.predicate, literal(42)})
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end
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test "creating a description with a list of initial triples" do
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desc = Description.new([{EX.Subject, EX.predicate1, EX.Object1},
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{EX.Subject, EX.predicate2, EX.Object2}])
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assert description_of_subject(desc, uri(EX.Subject))
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assert description_includes_predication(desc, {EX.predicate1, uri(EX.Object1)})
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assert description_includes_predication(desc, {EX.predicate2, uri(EX.Object2)})
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desc = Description.new(EX.Subject, EX.predicate, [EX.Object, bnode(:foo), "bar"])
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assert description_of_subject(desc, uri(EX.Subject))
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assert description_includes_predication(desc, {EX.predicate, uri(EX.Object)})
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assert description_includes_predication(desc, {EX.predicate, bnode(:foo)})
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assert description_includes_predication(desc, {EX.predicate, literal("bar")})
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end
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test "creating a description from another description" do
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desc1 = Description.new({EX.Other, EX.predicate, EX.Object})
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desc2 = Description.new(EX.Subject, desc1)
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assert description_of_subject(desc2, uri(EX.Subject))
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assert description_includes_predication(desc2, {EX.predicate, uri(EX.Object)})
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end
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test "creating a description from a map with convertible RDF term" do
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desc = Description.new(EX.Subject, %{EX.Predicate => EX.Object})
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assert description_of_subject(desc, uri(EX.Subject))
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assert description_includes_predication(desc, {uri(EX.Predicate), uri(EX.Object)})
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end
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describe "add" do
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test "a predicate-object-pair of proper RDF terms" do
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assert Description.add(description(), EX.predicate, uri(EX.Object))
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|> description_includes_predication({EX.predicate, uri(EX.Object)})
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assert Description.add(description(), {EX.predicate, uri(EX.Object)})
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|> description_includes_predication({EX.predicate, uri(EX.Object)})
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end
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test "a predicate-object-pair of convertible RDF terms" do
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assert Description.add(description(),
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"http://example.com/description/predicate", uri(EX.Object))
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|> description_includes_predication({EX.predicate, uri(EX.Object)})
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assert Description.add(description(),
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{"http://example.com/description/predicate", 42})
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|> description_includes_predication({EX.predicate, literal(42)})
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# TODO: Test a url-string as object ...
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assert Description.add(description(),
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{"http://example.com/description/predicate", bnode(:foo)})
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|> description_includes_predication({EX.predicate, bnode(:foo)})
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end
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test "a proper triple" do
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assert Description.add(description(),
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{uri(EX.Subject), EX.predicate, uri(EX.Object)})
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|> description_includes_predication({EX.predicate, uri(EX.Object)})
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assert Description.add(description(),
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{uri(EX.Subject), EX.predicate, literal(42)})
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|> description_includes_predication({EX.predicate, literal(42)})
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assert Description.add(description(),
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{uri(EX.Subject), EX.predicate, bnode(:foo)})
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|> description_includes_predication({EX.predicate, bnode(:foo)})
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end
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test "add ignores triples not about the subject of the Description struct" do
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assert empty_description(
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Description.add(description(), {EX.Other, EX.predicate, uri(EX.Object)}))
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end
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test "a list of predicate-object-pairs" do
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desc = Description.add(description(),
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[{EX.predicate, EX.Object1}, {EX.predicate, EX.Object2}])
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assert description_includes_predication(desc, {EX.predicate, uri(EX.Object1)})
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assert description_includes_predication(desc, {EX.predicate, uri(EX.Object2)})
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end
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test "a list of triples" do
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desc = Description.add(description(), [
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{EX.Subject, EX.predicate1, EX.Object1},
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{EX.Subject, EX.predicate2, EX.Object2}
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])
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assert description_includes_predication(desc, {EX.predicate1, uri(EX.Object1)})
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assert description_includes_predication(desc, {EX.predicate2, uri(EX.Object2)})
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end
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test "a list of mixed triples and predicate-object-pairs" do
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desc = Description.add(description(), [
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{EX.predicate, EX.Object1},
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{EX.Subject, EX.predicate, EX.Object2},
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{EX.Other, EX.predicate, EX.Object3}
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])
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assert description_of_subject(desc, uri(EX.Subject))
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assert description_includes_predication(desc, {EX.predicate, uri(EX.Object1)})
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assert description_includes_predication(desc, {EX.predicate, uri(EX.Object2)})
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refute description_includes_predication(desc, {EX.predicate, uri(EX.Object3)})
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end
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test "another description" do
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desc = description([{EX.predicate1, EX.Object1}, {EX.predicate2, EX.Object2}])
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|> Description.add(Description.new({EX.Other, EX.predicate3, EX.Object3}))
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assert description_of_subject(desc, uri(EX.Subject))
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assert description_includes_predication(desc, {EX.predicate1, uri(EX.Object1)})
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assert description_includes_predication(desc, {EX.predicate2, uri(EX.Object2)})
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assert description_includes_predication(desc, {EX.predicate3, uri(EX.Object3)})
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desc = Description.add(desc, Description.new({EX.Other, EX.predicate1, EX.Object4}))
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assert description_includes_predication(desc, {EX.predicate1, uri(EX.Object1)})
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assert description_includes_predication(desc, {EX.predicate2, uri(EX.Object2)})
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assert description_includes_predication(desc, {EX.predicate3, uri(EX.Object3)})
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assert description_includes_predication(desc, {EX.predicate1, uri(EX.Object4)})
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end
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test "a map of predications with convertible RDF terms" do
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desc = description([{EX.predicate1, EX.Object1}, {EX.predicate2, EX.Object2}])
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|> Description.add(%{EX.predicate3 => EX.Object3})
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assert description_of_subject(desc, uri(EX.Subject))
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assert description_includes_predication(desc, {EX.predicate1, uri(EX.Object1)})
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assert description_includes_predication(desc, {EX.predicate2, uri(EX.Object2)})
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assert description_includes_predication(desc, {EX.predicate3, uri(EX.Object3)})
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desc = Description.add(desc, %{EX.predicate1 => EX.Object1,
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EX.predicate2 => [EX.Object2, 42],
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EX.predicate3 => [bnode(:foo)]})
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assert Description.count(desc) == 5
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assert description_includes_predication(desc, {EX.predicate1, uri(EX.Object1)})
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assert description_includes_predication(desc, {EX.predicate2, uri(EX.Object2)})
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assert description_includes_predication(desc, {EX.predicate2, literal(42)})
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assert description_includes_predication(desc, {EX.predicate3, uri(EX.Object3)})
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assert description_includes_predication(desc, {EX.predicate3, bnode(:foo)})
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end
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test "a map of predications with inconvertible RDF terms" do
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assert_raise RDF.InvalidURIError, fn ->
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Description.add(description(), %{"not a URI" => uri(EX.Object)})
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end
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assert_raise RDF.InvalidLiteralError, fn ->
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Description.add(description(), %{EX.prop => self()})
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end
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end
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test "duplicates are ignored" do
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desc = Description.add(description(), {EX.predicate, EX.Object})
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assert Description.add(desc, {EX.predicate, EX.Object}) == desc
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assert Description.add(desc, {EX.Subject, EX.predicate, EX.Object}) == desc
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desc = Description.add(description(), {EX.predicate, 42})
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assert Description.add(desc, {EX.predicate, literal(42)}) == desc
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end
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test "non-convertible Triple elements are causing an error" do
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assert_raise RDF.InvalidURIError, fn ->
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Description.add(description(), {"not a URI", uri(EX.Object)})
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end
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assert_raise RDF.InvalidLiteralError, fn ->
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Description.add(description(), {EX.prop, self()})
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end
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end
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end
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test "pop a triple" do
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assert Description.pop(Description.new(EX.S)) == {nil, Description.new(EX.S)}
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{triple, desc} = Description.new({EX.S, EX.p, EX.O}) |> Description.pop
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assert {uri(EX.S), uri(EX.p), uri(EX.O)} == triple
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assert Enum.count(desc.predications) == 0
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{{subject, predicate, _}, desc} =
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Description.new([{EX.S, EX.p, EX.O1}, {EX.S, EX.p, EX.O2}])
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|> Description.pop
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assert {subject, predicate} == {uri(EX.S), uri(EX.p)}
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assert Enum.count(desc.predications) == 1
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{{subject, _, _}, desc} =
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Description.new([{EX.S, EX.p1, EX.O1}, {EX.S, EX.p2, EX.O2}])
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|> Description.pop
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assert subject == uri(EX.S)
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assert Enum.count(desc.predications) == 1
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end
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describe "Enumerable protocol" do
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test "Enum.count" do
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assert Enum.count(Description.new EX.foo) == 0
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assert Enum.count(Description.new {EX.S, EX.p, EX.O}) == 1
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assert Enum.count(Description.new [{EX.S, EX.p, EX.O1}, {EX.S, EX.p, EX.O2}]) == 2
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end
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test "Enum.member?" do
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refute Enum.member?(Description.new(EX.S), {uri(EX.S), EX.p, uri(EX.O)})
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assert Enum.member?(Description.new({EX.S, EX.p, EX.O}), {EX.S, EX.p, EX.O})
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desc = Description.new([
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{EX.Subject, EX.predicate1, EX.Object1},
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{EX.Subject, EX.predicate2, EX.Object2},
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{EX.predicate2, EX.Object3}])
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assert Enum.member?(desc, {EX.Subject, EX.predicate1, EX.Object1})
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assert Enum.member?(desc, {EX.Subject, EX.predicate2, EX.Object2})
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assert Enum.member?(desc, {EX.Subject, EX.predicate2, EX.Object3})
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refute Enum.member?(desc, {EX.Subject, EX.predicate1, EX.Object2})
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end
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test "Enum.reduce" do
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desc = Description.new([
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{EX.Subject, EX.predicate1, EX.Object1},
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{EX.Subject, EX.predicate2, EX.Object2},
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{EX.predicate2, EX.Object3}])
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assert desc == Enum.reduce(desc, description(),
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fn(triple, acc) -> acc |> Description.add(triple) end)
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end
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end
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describe "Access behaviour" do
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test "access with the [] operator" do
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assert Description.new(EX.Subject)[EX.predicate] == nil
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assert Description.new(EX.Subject, EX.predicate, EX.Object)[EX.predicate] == [uri(EX.Object)]
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assert Description.new(EX.Subject, EX.Predicate, EX.Object)[EX.Predicate] == [uri(EX.Object)]
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assert Description.new(EX.Subject, EX.predicate, EX.Object)["http://example.com/description/predicate"] == [uri(EX.Object)]
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assert Description.new([{EX.Subject, EX.predicate1, EX.Object1},
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{EX.Subject, EX.predicate1, EX.Object2},
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{EX.Subject, EX.predicate2, EX.Object3}])[EX.predicate1] ==
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[uri(EX.Object1), uri(EX.Object2)]
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end
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end
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end
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