chore: add unit test for env.Load() function

internal/env/env_test.go

@@ -0,0 +1,49 @@
+package env_test
+
+import (
+	"os"
+	"testing"
+
+	"github.com/edmarfelipe/go-ci/internal/env"
+)
+
+func TestLoad(t *testing.T) {
+	testCases := []struct {
+		name     string
+		env      map[string]string
+		expected *env.Env
+	}{
+		{
+			name: "default values",
+			env:  map[string]string{},
+			expected: &env.Env{
+				ServiceAddr: ":8080",
+			},
+		},
+		{
+			name: "custom values",
+			env: map[string]string{
+				"SERVICE_PORT": ":9090",
+			},
+			expected: &env.Env{
+				ServiceAddr: ":9090",
+			},
+		},
+	}
+
+	for _, tc := range testCases {
+		os.Clearenv()
+		for k, v := range tc.env {
+			os.Setenv(k, v)
+		}
+
+		env, err := env.Load()
+		if err != nil {
+			t.Fatalf("test %s: unexpected error: %v", tc.name, err)
+		}
+
+		if env.ServiceAddr != tc.expected.ServiceAddr {
+			t.Errorf("test %s: expected ServiceAddr %q, got %q", tc.name, tc.expected.ServiceAddr, env.ServiceAddr)
+		}
+	}
+}