Skip empty lock files

2 files changed, 21 insertions, 0 deletions

diff --git a/spec/fixtures/empty/composer.lock b/spec/fixtures/empty/composer.lock
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/spec/fixtures/empty/composer.lock
diff --git a/spec/unit/core/parser_spec.rb b/spec/unit/core/parser_spec.rb
new file mode 100644
index 0000000..ab9be03
--- /dev/null
+++ b/spec/unit/core/parser_spec.rb
@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+RSpec.describe Spandx::Core::Parser do
+  subject { described_class }
+
+  describe ".for" do
+    describe "when the `composer.lock` file is empty" do
+      let(:empty_file) { fixture_file('empty/composer.lock') }
+      let(:result) { subject.for(empty_file) }
+
+      specify { expect(result).to be(Spandx::Core::Parser::UNKNOWN) }
+    end
+
+    describe "when the `composer.lock` file is discovered" do
+      let(:lock_file) { fixture_file('composer/composer.lock') }
+      let(:result) { subject.for(lock_file) }
+
+      specify { expect(result).to be_instance_of(Spandx::Php::Parsers::Composer) }
+    end
+  end
+end