Add NIP-01 compliant client code

spec/nostr/user_spec.rb

@@ -0,0 +1,126 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Nostr::User do
+  let(:keypair) do
+    Nostr::KeyPair.new(
+      private_key: '893c4cc8088924796b41dc788f7e2f746734497010b1a9f005c1faad7074b900',
+      public_key: '2d7661527d573cc8e84f665fa971dd969ba51e2526df00c149ff8e40a58f9558'
+    )
+  end
+
+  let(:user) do
+    described_class.new(keypair:)
+  end
+
+  describe '.new' do
+    context 'when no key pair is provided' do
+      let(:nostr_keygen) do
+        instance_double(Nostr::Keygen, generate_key_pair: keypair)
+      end
+
+      it 'creates an instance of a user with a new key pair' do
+        allow(Nostr::Keygen).to receive(:new).and_return(nostr_keygen)
+
+        user = described_class.new
+
+        aggregate_failures do
+          expect(user).to be_an_instance_of(described_class)
+          expect(user.keypair).to eq(keypair)
+        end
+      end
+    end
+
+    context 'when a key pair is provided' do
+      it 'creates an instance of a user using the provided key pair' do
+        user = described_class.new(keypair:)
+
+        expect(user.keypair).to eq(keypair)
+      end
+    end
+  end
+
+  describe '#keypair' do
+    it 'exposes the user key pair' do
+      expect(user.keypair).to eq(keypair)
+    end
+  end
+
+  describe '#create_event' do
+    context 'when created_at is missing' do
+      let(:now) { instance_double(Time, to_i: 1_230_981_305) }
+
+      before { allow(Time).to receive(:now).and_return(now) }
+
+      it 'builds and signs an event using the user key pair and the current time' do
+        event = user.create_event(
+          kind: Nostr::EventKind::TEXT_NOTE,
+          tags: [%w[e 189df012cfff8a075785b884bd702025f4a7a37710f581c4ac9d33e24b585408]],
+          content: 'Your feedback is appreciated, now pay $8'
+        )
+
+        expect(event).to eq(
+          Nostr::Event.new(
+            id: '2a3184512d34077601e992ba3c3215354b21a8c76f85c2c7f66093481854e811',
+            pubkey: '2d7661527d573cc8e84f665fa971dd969ba51e2526df00c149ff8e40a58f9558',
+            created_at: 1_230_981_305,
+            kind: 1,
+            tags: [%w[e 189df012cfff8a075785b884bd702025f4a7a37710f581c4ac9d33e24b585408]],
+            content: 'Your feedback is appreciated, now pay $8',
+            sig: '970fea8d213da86c583804522c45d04e61c18c433704b62f793f187bca82091c' \
+                 '3884d6207c6511c0966ecf6230082179a49257b03e5a4d2d08da9124a190f1bb'
+          )
+        )
+      end
+    end
+
+    context 'when tags is missing' do
+      it 'builds and signs an event using the user key pair and empty tags' do
+        event = user.create_event(
+          kind: Nostr::EventKind::TEXT_NOTE,
+          tags: [],
+          created_at: 1_230_981_305,
+          content: 'Your feedback is appreciated, now pay $8'
+        )
+
+        expect(event).to eq(
+          Nostr::Event.new(
+            id: 'ed35331e66dc166109d45daff39b8c1bf83d4c0c7a59a9a8a23b240dc126d526',
+            pubkey: '2d7661527d573cc8e84f665fa971dd969ba51e2526df00c149ff8e40a58f9558',
+            created_at: 1_230_981_305,
+            kind: 1,
+            tags: [],
+            content: 'Your feedback is appreciated, now pay $8',
+            sig: 'f5a2cdc29723c888df52afd6f8c6e260110f74ed23fee3edbf39fff4a9f1b9f1' \
+                 'c93284b02d4eba0481325bb5555624ddf969d5905b63f17191f9132a0ddd97b0'
+          )
+        )
+      end
+    end
+
+    context 'when all attributes are present' do
+      it 'builds and signs an event using the user key pair' do
+        event = user.create_event(
+          created_at: 1_230_981_305,
+          kind: Nostr::EventKind::TEXT_NOTE,
+          tags: [%w[e 189df012cfff8a075785b884bd702025f4a7a37710f581c4ac9d33e24b585408]],
+          content: 'Your feedback is appreciated, now pay $8'
+        )
+
+        expect(event).to eq(
+          Nostr::Event.new(
+            id: '2a3184512d34077601e992ba3c3215354b21a8c76f85c2c7f66093481854e811',
+            pubkey: '2d7661527d573cc8e84f665fa971dd969ba51e2526df00c149ff8e40a58f9558',
+            created_at: 1_230_981_305,
+            kind: 1,
+            tags: [%w[e 189df012cfff8a075785b884bd702025f4a7a37710f581c4ac9d33e24b585408]],
+            content: 'Your feedback is appreciated, now pay $8',
+            sig: '970fea8d213da86c583804522c45d04e61c18c433704b62f793f187bca82091c' \
+                 '3884d6207c6511c0966ecf6230082179a49257b03e5a4d2d08da9124a190f1bb'
+          )
+        )
+      end
+    end
+  end
+end