1 files changed, 34 insertions, 0 deletions
diff --git a/spec/support_specs/graphql/var_spec.rb b/spec/support_specs/graphql/var_spec.rb
new file mode 100644
index 00000000000..f708f01a11e
--- /dev/null
+++ b/spec/support_specs/graphql/var_spec.rb
@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe ::Graphql::Var do
+  subject(:var) { described_class.new('foo', 'Int') }
+
+  it 'associates a name with a type and an initially empty value' do
+    expect(var).to have_attributes(
+      name: 'foo',
+      type: 'Int',
+      value: be_nil
+    )
+  end
+
+  it 'has a correct signature' do
+    expect(var).to have_attributes(sig: '$foo: Int')
+  end
+
+  it 'implements to_graphql_value as $name' do
+    expect(var.to_graphql_value).to eq('$foo')
+  end
+
+  it 'can set a value using with, returning a new object' do
+    with_value = var.with(42)
+
+    expect(with_value).to have_attributes(name: 'foo', type: 'Int', value: 42)
+    expect(var).to have_attributes(value: be_nil)
+  end
+
+  it 'returns an object suitable for passing to post_graphql(variables:)' do
+    expect(var.with(17).to_h).to eq('foo' => 17)
+  end
+end