test: increase test coverage (#712)

This PR adds tests for utility methods.

---------

Co-authored-by: pauhull <[email protected]>

internal/cmd/util/deprecation_test.go

@@ -0,0 +1,70 @@
+package util_test
+
+import (
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/dustin/go-humanize"
+	"github.com/stretchr/testify/assert"
+
+	"github.com/hetznercloud/cli/internal/cmd/util"
+	"github.com/hetznercloud/hcloud-go/v2/hcloud"
+)
+
+type testDeprecatable struct {
+	isDeprecated         bool
+	unavailableAfter     time.Time
+	deprecationAnnounced time.Time
+}
+
+func (t testDeprecatable) IsDeprecated() bool {
+	return t.isDeprecated
+}
+
+func (t testDeprecatable) UnavailableAfter() time.Time {
+	return t.unavailableAfter
+}
+
+func (t testDeprecatable) DeprecationAnnounced() time.Time {
+	return t.deprecationAnnounced
+}
+
+func TestDescribeDeprecation(t *testing.T) {
+
+	time.Local = time.UTC
+
+	type testCase struct {
+		deprecatable hcloud.Deprecatable
+		expected     string
+	}
+
+	dep := testDeprecatable{
+		isDeprecated:         true,
+		unavailableAfter:     time.Date(2021, 12, 31, 23, 59, 59, 0, time.UTC),
+		deprecationAnnounced: time.Date(2021, 1, 1, 0, 0, 0, 0, time.UTC),
+	}
+
+	tests := map[string]testCase{
+		"not deprecated": {
+			deprecatable: testDeprecatable{
+				isDeprecated: false,
+			},
+			expected: "",
+		},
+		"deprecated": {
+			deprecatable: dep,
+			expected: fmt.Sprintf(
+				"Deprecation:\n  Announced:\t\tFri Jan  1 00:00:00 UTC 2021 (%s)\n  Unavailable After:\tFri Dec 31 23:59:59 UTC 2021 (%s)\n",
+				humanize.Time(dep.DeprecationAnnounced()), humanize.Time(dep.UnavailableAfter()),
+			),
+		},
+	}
+
+	for name, test := range tests {
+		t.Run(name, func(t *testing.T) {
+			info := util.DescribeDeprecation(test.deprecatable)
+			assert.Equal(t, test.expected, info)
+		})
+	}
+}