Function TestLabelNames

web/api/v1/api_test.go:814–919

(t *testing.T)

}

func TestLabelNames(t *testing.T) {
	// TestEndpoints doesn't have enough label names to test api.labelNames
	// endpoint properly. Hence we test it separately.
	s := promqltest.LoadedStorage(t, `
		load 1m
			test_metric1{foo1="bar", baz="abc"} 0+100x100
			test_metric1{foo2="boo"} 1+0x100
			test_metric2{foo="boo"} 1+0x100
			test_metric2{foo="boo", xyz="qwerty"} 1+0x100
			test_metric2{foo="baz", abc="qwerty"} 1+0x100
	`)

	api := &API{
		Queryable: s,
		parser:    testParser,
	}
	request := func(method, limit string, matchers ...string) (*http.Request, error) {
		u, err := url.Parse("http://example.com")
		require.NoError(t, err)
		q := u.Query()
		for _, matcher := range matchers {
			q.Add("match[]", matcher)
		}
		if limit != "" {
			q.Add("limit", limit)
		}
		u.RawQuery = q.Encode()

		r, err := http.NewRequest(method, u.String(), http.NoBody)
		if method == http.MethodPost {
			r.Header.Set("Content-Type", "application/x-www-form-urlencoded")
		}
		return r, err
	}

	for _, tc := range []struct {
		name              string
		api               *API
		matchers          []string
		limit             string
		expected          []string
		expectedErrorType errorType
	}{
		{
			name:     "no matchers",
			expected: []string{"__name__", "abc", "baz", "foo", "foo1", "foo2", "xyz"},
			api:      api,
		},
		{
			name:     "non empty label matcher",
			matchers: []string{`{foo=~".+"}`},
			expected: []string{"__name__", "abc", "foo", "xyz"},
			api:      api,
		},
		{
			name:     "non empty label matcher with limit",
			matchers: []string{`{foo=~".+"}`},
			expected: []string{"__name__", "abc"},