Add test for create secret

Signed-off-by: Somtochi Onyekwere <somtochionyekwere@gmail.com>

cmd/flux/create_secret_helm_test.go

@@ -0,0 +1,31 @@
+package main
+
+import (
+	"testing"
+)
+
+func TestCreateHelmSecret(t *testing.T) {
+	tests := []struct {
+		name   string
+		args   string
+		assert assertFunc
+	}{
+		{
+			args:   "create secret helm",
+			assert: assertError("secret name is required"),
+		},
+		{
+			args:   "create secret helm helm-secret --username=my-username --password=my-password --namespace=my-namespace --export",
+			assert: assertGoldenFile("testdata/create_secret/helm/secret-helm.yaml"),
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			cmd := cmdTestCase{
+				args:   tt.args,
+				assert: tt.assert,
+			}
+			cmd.runTestCmd(t)
+		})
+	}
+}