Add spec for sessions

spec/nylas/resources/sessions_spec.rb

@@ -0,0 +1,39 @@
+# frozen_string_literal: true
+
+describe Nylas::Sessions do
+  let(:sessions) { described_class.new(client) }
+  let(:response) do
+    [{
+      "session_id": "session-id-123"
+    }, "mock_request_id"]
+  end
+
+  describe "#create" do
+    it "calls the post method with the correct parameters" do
+      request_body = {
+        configuration_id: "configuration-123",
+        time_to_live: 30
+      }
+      path = "#{api_uri}/v3/scheduling/sessions"
+      allow(sessions).to receive(:post)
+        .with(path: path, request_body: request_body)
+        .and_return(response)
+
+      sessions_response = sessions.create(request_body: request_body)
+      expect(sessions_response).to eq(response)
+    end
+  end
+
+  describe "#destroy" do
+    it "calls the delete method with the correct parameters" do
+      session_id = "session-123"
+      path = "#{api_uri}/v3/scheduling/sessions/#{session_id}"
+      allow(sessions).to receive(:delete)
+        .with(path: path)
+        .and_return([true, "mock_request_id"])
+
+      sessions_response = sessions.destroy(session_id: session_id)
+      expect(sessions_response).to eq([true, "mock_request_id"])
+    end
+  end
+end