Query oracle and API freeze

Label matchers (equal, not-equal, regexp, not-regexp) in labels/, postings intersection/union/difference in internal/postings/, LabelValues and AllPostings on index, block, and head readers. ingot.go wired to real DB backed by head + block readers. Querier snapshots overlapping blocks, Select resolves matchers to postings, merged iterator chains blocks then head with block-wins dedup. Oracle tests compare every query against a naive []sample reference across head-only, block-only, head+block merge seam, multiple blocks, all four matcher types, and time range filtering.
2026-07-04 15:19:09 -04:00
parent 42b03db2fa
commit 323a6f2951
11 changed files with 1585 additions and 0 deletions
@@ -0,0 +1,107 @@
+package labels
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestMatcherMatches(t *testing.T) {
+	tests := []struct {
+		name    string
+		typ     MatchType
+		pattern string
+		value   string
+		want    bool
+	}{
+		// MatchEqual
+		{name: "equal_match", typ: MatchEqual, pattern: "foo", value: "foo", want: true},
+		{name: "equal_no_match", typ: MatchEqual, pattern: "foo", value: "bar", want: false},
+		{name: "equal_empty", typ: MatchEqual, pattern: "", value: "", want: true},
+		{name: "equal_empty_vs_nonempty", typ: MatchEqual, pattern: "", value: "x", want: false},
+
+		// MatchNotEqual
+		{name: "not_equal_match", typ: MatchNotEqual, pattern: "foo", value: "bar", want: true},
+		{name: "not_equal_no_match", typ: MatchNotEqual, pattern: "foo", value: "foo", want: false},
+		{name: "not_equal_empty", typ: MatchNotEqual, pattern: "", value: "x", want: true},
+
+		// MatchRegexp
+		{name: "regexp_exact", typ: MatchRegexp, pattern: "foo", value: "foo", want: true},
+		{name: "regexp_no_match", typ: MatchRegexp, pattern: "foo", value: "foobar", want: false},
+		{name: "regexp_alternation", typ: MatchRegexp, pattern: "foo|bar", value: "bar", want: true},
+		{name: "regexp_alternation_no_match", typ: MatchRegexp, pattern: "foo|bar", value: "baz", want: false},
+		{name: "regexp_wildcard", typ: MatchRegexp, pattern: "fo.*", value: "foobar", want: true},
+		{name: "regexp_prefix_anchored", typ: MatchRegexp, pattern: "fo", value: "foo", want: false},
+		{name: "regexp_dot_plus", typ: MatchRegexp, pattern: ".+", value: "anything", want: true},
+		{name: "regexp_dot_plus_empty", typ: MatchRegexp, pattern: ".+", value: "", want: false},
+
+		// MatchNotRegexp
+		{name: "not_regexp_match", typ: MatchNotRegexp, pattern: "foo", value: "bar", want: true},
+		{name: "not_regexp_no_match", typ: MatchNotRegexp, pattern: "foo", value: "foo", want: false},
+		{name: "not_regexp_alternation", typ: MatchNotRegexp, pattern: "foo|bar", value: "baz", want: true},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			m, err := NewMatcher(tc.typ, "__name__", tc.pattern)
+			require.NoError(t, err)
+			assert.Equal(t, tc.want, m.Matches(tc.value))
+		})
+	}
+}
+
+func TestNewMatcherBadRegexp(t *testing.T) {
+	_, err := NewMatcher(MatchRegexp, "__name__", "[invalid")
+	assert.Error(t, err)
+}
+
+func TestMustNewMatcherPanics(t *testing.T) {
+	assert.Panics(t, func() {
+		MustNewMatcher(MatchRegexp, "__name__", "[invalid")
+	})
+}
+
+func TestFromStrings(t *testing.T) {
+	tests := []struct {
+		name string
+		args []string
+		want []Label
+	}{
+		{
+			name: "single_pair",
+			args: []string{"__name__", "temp"},
+			want: []Label{{Name: "__name__", Value: "temp"}},
+		},
+		{
+			name: "multiple_pairs_sorted",
+			args: []string{"room", "office", "__name__", "temp"},
+			want: []Label{{Name: "__name__", Value: "temp"}, {Name: "room", Value: "office"}},
+		},
+		{
+			name: "empty",
+			args: []string{},
+			want: []Label{},
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			got := FromStrings(tc.args...)
+			assert.Equal(t, tc.want, got)
+		})
+	}
+}
+
+func TestFromStringsPanicsOnOdd(t *testing.T) {
+	assert.Panics(t, func() {
+		FromStrings("__name__")
+	})
+}
+
+func TestMatchTypeString(t *testing.T) {
+	assert.Equal(t, "=", MatchEqual.String())
+	assert.Equal(t, "!=", MatchNotEqual.String())
+	assert.Equal(t, "=~", MatchRegexp.String())
+	assert.Equal(t, "!~", MatchNotRegexp.String())
+}