91 lines
2.3 KiB
Go
91 lines
2.3 KiB
Go
package lib
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import (
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"reflect"
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"testing"
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"time"
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"github.com/stretchr/testify/require"
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)
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func makeFullTelemetryConfig(t *testing.T) TelemetryConfig {
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var (
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strSliceVal = []string{"foo"}
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strVal = "foo"
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intVal = int64(1 * time.Second)
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)
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cfg := TelemetryConfig{}
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cfgP := reflect.ValueOf(&cfg)
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cfgV := cfgP.Elem()
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for i := 0; i < cfgV.NumField(); i++ {
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f := cfgV.Field(i)
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if !f.IsValid() || !f.CanSet() {
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continue
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}
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// Set non-zero values for all fields. We only implement kinds that exist
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// now for brevity but will fail the test if a new field type is added since
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// this is likely not implemented in MergeDefaults either.
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switch f.Kind() {
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case reflect.Slice:
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if f.Type() != reflect.TypeOf(strSliceVal) {
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t.Fatalf("unknown slice type in TelemetryConfig." +
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" You need to update MergeDefaults and this test code.")
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}
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f.Set(reflect.ValueOf(strSliceVal))
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case reflect.Int, reflect.Int64: // time.Duration == int64
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f.SetInt(intVal)
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case reflect.String:
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f.SetString(strVal)
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case reflect.Bool:
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f.SetBool(true)
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default:
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t.Fatalf("unknown field type in TelemetryConfig" +
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" You need to update MergeDefaults and this test code.")
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}
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}
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return cfg
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}
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func TestTelemetryConfig_MergeDefaults(t *testing.T) {
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tests := []struct {
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name string
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cfg TelemetryConfig
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defaults TelemetryConfig
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want TelemetryConfig
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}{
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{
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name: "basic merge",
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cfg: TelemetryConfig{
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StatsiteAddr: "stats.it:4321",
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},
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defaults: TelemetryConfig{
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StatsdAddr: "localhost:5678",
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StatsiteAddr: "localhost:1234",
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},
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want: TelemetryConfig{
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StatsdAddr: "localhost:5678",
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StatsiteAddr: "stats.it:4321",
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},
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},
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{
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// This test uses reflect to build a TelemetryConfig with every value set
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// to ensure that we exercise every possible field type. This means that
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// if new fields are added that are not supported types in the code, this
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// test should either ensure they work or fail to build the test case and
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// fail the test.
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name: "exhaustive",
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cfg: TelemetryConfig{},
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defaults: makeFullTelemetryConfig(t),
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want: makeFullTelemetryConfig(t),
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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c := tt.cfg
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c.MergeDefaults(&tt.defaults)
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require.Equal(t, tt.want, c)
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})
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}
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}
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