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📁 ..	-	2025-05-25 12:27
📄 tag.go // Copyright (C) MongoDB, Inc. 2017-present. // // Licensed under the Apache License, Version 2.0 (the "License"); you may // not use this file except in compliance with the License. You may obtain // a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 // Package tag provides types for filtering replica set members using tags in a read preference. // // For more information about read preference tags, see // https://www.mongodb.com/docs/manual/core/read-preference-tags/ package tag // import "go.mongodb.org/mongo-driver/tag" import ( "bytes" "fmt" ) // Tag is a name/value pair. type Tag struct { Name string Value string } // String returns a human-readable human-readable description of the tag. func (tag Tag) String() string { return fmt.Sprintf("%s=%s", tag.Name, tag.Value) } // NewTagSetFromMap creates a tag set from a map. // // For more information about read preference tags, see // https://www.mongodb.com/docs/manual/core/read-preference-tags/ func NewTagSetFromMap(m map[string]string) Set { var set Set for k, v := range m { set = append(set, Tag{Name: k, Value: v}) } return set } // NewTagSetsFromMaps creates a list of tag sets from a slice of maps. // // For more information about read preference tags, see // https://www.mongodb.com/docs/manual/core/read-preference-tags/ func NewTagSetsFromMaps(maps []map[string]string) []Set { sets := make([]Set, 0, len(maps)) for _, m := range maps { sets = append(sets, NewTagSetFromMap(m)) } return sets } // Set is an ordered list of Tags. type Set []Tag // Contains indicates whether the name/value pair exists in the tagset. func (ts Set) Contains(name, value string) bool { for _, t := range ts { if t.Name == name && t.Value == value { return true } } return false } // ContainsAll indicates whether all the name/value pairs exist in the tagset. func (ts Set) ContainsAll(other []Tag) bool { for _, ot := range other { if !ts.Contains(ot.Name, ot.Value) { return false } } return true } // String returns a human-readable human-readable description of the tagset. func (ts Set) String() string { var b bytes.Buffer for i, tag := range ts { if i > 0 { b.WriteString(",") } b.WriteString(tag.String()) } return b.String() }	2.22 KB	2025-05-25 12:27
📄 tag_test.go // Copyright (C) MongoDB, Inc. 2017-present. // // Licensed under the Apache License, Version 2.0 (the "License"); you may // not use this file except in compliance with the License. You may obtain // a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 package tag import ( "testing" "go.mongodb.org/mongo-driver/internal/assert" "go.mongodb.org/mongo-driver/internal/require" ) func TestTag_String(t testing.T) { t.Parallel() tag := Tag{Name: "a", Value: "1"} assert.Equal(t, "a=1", tag.String(), `expected "a=1", got %q`, tag.String()) } func TestTagSets_NewTagSet(t testing.T) { t.Parallel() ts := Set{Tag{Name: "a", Value: "1"}} require.True(t, ts.Contains("a", "1")) require.False(t, ts.Contains("1", "a")) require.False(t, ts.Contains("A", "1")) require.False(t, ts.Contains("a", "10")) } func TestTagSets_NewTagSetFromMap(t testing.T) { t.Parallel() ts := NewTagSetFromMap(map[string]string{"a": "1"}) require.True(t, ts.Contains("a", "1")) require.False(t, ts.Contains("1", "a")) require.False(t, ts.Contains("A", "1")) require.False(t, ts.Contains("a", "10")) } func TestTagSets_NewTagSetsFromMaps(t testing.T) { t.Parallel() tss := NewTagSetsFromMaps([]map[string]string{{"a": "1"}, {"b": "1"}}) require.Len(t, tss, 2) ts := tss[0] require.True(t, ts.Contains("a", "1")) require.False(t, ts.Contains("1", "a")) require.False(t, ts.Contains("A", "1")) require.False(t, ts.Contains("a", "10")) ts = tss[1] require.True(t, ts.Contains("b", "1")) require.False(t, ts.Contains("1", "b")) require.False(t, ts.Contains("B", "1")) require.False(t, ts.Contains("b", "10")) } func TestTagSets_ContainsAll(t testing.T) { t.Parallel() ts := Set{ Tag{Name: "a", Value: "1"}, Tag{Name: "b", Value: "2"}, } test := Set{Tag{Name: "a", Value: "1"}} require.True(t, ts.ContainsAll(test)) test = Set{Tag{Name: "a", Value: "1"}, Tag{Name: "b", Value: "2"}} require.True(t, ts.ContainsAll(test)) test = Set{Tag{Name: "a", Value: "1"}, Tag{Name: "b", Value: "2"}} require.True(t, ts.ContainsAll(test)) test = Set{Tag{Name: "a", Value: "2"}, Tag{Name: "b", Value: "1"}} require.False(t, ts.ContainsAll(test)) test = Set{Tag{Name: "a", Value: "1"}, Tag{Name: "b", Value: "1"}} require.False(t, ts.ContainsAll(test)) test = Set{Tag{Name: "a", Value: "2"}, Tag{Name: "b", Value: "2"}} require.False(t, ts.ContainsAll(test)) } func TestTagSets_String(t testing.T) { t.Parallel() ts := Set{ Tag{Name: "a", Value: "1"}, Tag{Name: "b", Value: "2"}, } assert.Equal(t, "a=1,b=2", ts.String(), `expected "a=1,b=2", got %q`, ts.String()) }	2.56 KB	2025-05-25 12:27

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