1 files changed, 48 insertions, 0 deletions
diff --git a/spec/lib/gitlab/kubernetes/kubectl_cmd_spec.rb b/spec/lib/gitlab/kubernetes/kubectl_cmd_spec.rb
new file mode 100644
index 00000000000..f24ab5579df
--- /dev/null
+++ b/spec/lib/gitlab/kubernetes/kubectl_cmd_spec.rb
@@ -0,0 +1,48 @@
+# frozen_string_literal: true
+
+require 'fast_spec_helper'
+
+describe Gitlab::Kubernetes::KubectlCmd do
+  describe '.delete' do
+    it 'constructs string properly' do
+      args = %w(resource_type type --flag-1 --flag-2)
+
+      expected_command = 'kubectl delete resource_type type --flag-1 --flag-2'
+
+      expect(described_class.delete(*args)).to eq expected_command
+    end
+  end
+
+  describe '.apply_file' do
+    context 'without optional args' do
+      it 'requires filename to be present' do
+        expect { described_class.apply_file(nil) }.to raise_error(ArgumentError, "filename is not present")
+        expect { described_class.apply_file("  ") }.to raise_error(ArgumentError, "filename is not present")
+      end
+
+      it 'constructs string properly' do
+        expected_command = 'kubectl apply -f filename'
+
+        expect(described_class.apply_file('filename')).to eq expected_command
+      end
+    end
+
+    context 'with optional args' do
+      it 'constructs command properly with many args' do
+        args = %w(arg-1 --flag-0-1 arg-2 --flag-0-2)
+
+        expected_command = 'kubectl apply -f filename arg-1 --flag-0-1 arg-2 --flag-0-2'
+
+        expect(described_class.apply_file('filename', *args)).to eq expected_command
+      end
+
+      it 'constructs command properly with single arg' do
+        args = "arg-1"
+
+        expected_command = 'kubectl apply -f filename arg-1'
+
+        expect(described_class.apply_file('filename', args)).to eq(expected_command)
+      end
+    end
+  end
+end