chore: add unit tests for pkg/utils/os (#4509)

* chore: add unit tests for pkg/utils/os

Signed-off-by: Charles-Edouard Brétéché <charled.breteche@gmail.com>

* review

Signed-off-by: Charles-Edouard Brétéché <charled.breteche@gmail.com>

Signed-off-by: Charles-Edouard Brétéché <charled.breteche@gmail.com>

.github/workflows/codecov.yaml

@@ -22,6 +22,9 @@ jobs:
       - name: Checkout
         uses: actions/checkout@ec3a7ce113134d7a93b817d10a8272cb61118579 # v2.4.0
 
+      - name: Unshallow
+        run: git fetch --prune --unshallow
+
       - uses: actions/setup-go@424fc82d43fa5a37540bae62709ddcc23d9520d4 # v2.1.5
         with:
           go-version: '1.18'

pkg/utils/os/env_test.go

@@ -0,0 +1,48 @@
+package os
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGetEnvWithFallback(t *testing.T) {
+	type args struct {
+		name     string
+		fallback string
+	}
+	tests := []struct {
+		name  string
+		setup map[string]string
+		args  args
+		want  string
+	}{
+		{
+			name: "fallback",
+			args: args{
+				"xxx",
+				"yyy",
+			},
+			want: "yyy",
+		},
+		{
+			name: "no fallback",
+			setup: map[string]string{
+				"xxx": "zzz",
+			},
+			args: args{
+				"xxx",
+				"yyy",
+			},
+			want: "zzz",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			for k, v := range tt.setup {
+				t.Setenv(k, v)
+			}
+			assert.Equal(t, tt.want, GetEnvWithFallback(tt.args.name, tt.args.fallback))
+		})
+	}
+}