From c1dcd5f91ff082025cbba195af7ed938ce217667 Mon Sep 17 00:00:00 2001
From: Szymon Szukalski <szymon@skas.io>
Date: Thu, 24 Oct 2024 11:41:23 +1100
Subject: Add CLI::validate_arguments tests

---
 spec/cli_spec.rb | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/spec/cli_spec.rb b/spec/cli_spec.rb
index 4799ff0..0062c1c 100644
--- a/spec/cli_spec.rb
+++ b/spec/cli_spec.rb
@@ -38,4 +38,36 @@ RSpec.describe CLI do
       end
     end
   end
+
+  describe '#validate_arguments' do
+    context 'when no arguments are provided' do
+      it 'prints usage message and exits' do
+        expect do
+          CLI.new([])
+        end.to output(%r{Usage: family_tree <path/to/actions.txt>}).to_stdout.and raise_error(SystemExit)
+      end
+    end
+
+    context 'when an invalid file path is provided' do
+      it 'prints error message and exits' do
+        expect do
+          CLI.new([invalid_file_path])
+        end.to output(/Error: The file 'non_existent_file.txt' does not exist./).to_stdout.and raise_error(SystemExit)
+      end
+    end
+
+    context 'when a valid file path is provided' do
+      it 'does not print any message' do
+        expect do
+          CLI.new([valid_file_path])
+        end.not_to output.to_stdout
+      end
+
+      it 'does not raise any errors' do
+        expect do
+          CLI.new([valid_file_path])
+        end.not_to raise_error
+      end
+    end
+  end
 end
-- 
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