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metadata: remove String method #7374

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merged 2 commits into from
Jul 1, 2024
Merged

metadata: remove String method #7374

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0d9717d
metadata: remove String method
dfawley Jul 1, 2024
0a107f3
rm tests
dfawley Jul 1, 2024
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15 changes: 0 additions & 15 deletions metadata/metadata.go
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Original file line number Diff line number Diff line change
Expand Up @@ -90,21 +90,6 @@ func Pairs(kv ...string) MD {
return md
}

// String implements the Stringer interface for pretty-printing a MD.
// Ordering of the values is non-deterministic as it ranges over a map.
func (md MD) String() string {
var sb strings.Builder
fmt.Fprintf(&sb, "MD{")
for k, v := range md {
if sb.Len() > 3 {
fmt.Fprintf(&sb, ", ")
}
fmt.Fprintf(&sb, "%s=[%s]", k, strings.Join(v, ", "))
}
fmt.Fprintf(&sb, "}")
return sb.String()
}

// Len returns the number of items in md.
func (md MD) Len() int {
return len(md)
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21 changes: 0 additions & 21 deletions metadata/metadata_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -22,7 +22,6 @@ import (
"context"
"reflect"
"strconv"
"strings"
"testing"
"time"

Expand Down Expand Up @@ -339,26 +338,6 @@ func (s) TestAppendToOutgoingContext_FromKVSlice(t *testing.T) {
}
}

func TestStringerMD(t *testing.T) {
for _, test := range []struct {
md MD
want []string
}{
{MD{}, []string{"MD{}"}},
{MD{"k1": []string{}}, []string{"MD{k1=[]}"}},
{MD{"k1": []string{"v1", "v2"}}, []string{"MD{k1=[v1, v2]}"}},
{MD{"k1": []string{"v1"}}, []string{"MD{k1=[v1]}"}},
{MD{"k1": []string{"v1", "v2"}, "k2": []string{}, "k3": []string{"1", "2", "3"}}, []string{"MD{", "k1=[v1, v2]", "k2=[]", "k3=[1, 2, 3]", "}"}},
} {
got := test.md.String()
for _, want := range test.want {
if !strings.Contains(got, want) {
t.Fatalf("Metadata string %q is missing %q", got, want)
}
}
}
}

// Old/slow approach to adding metadata to context
func Benchmark_AddingMetadata_ContextManipulationApproach(b *testing.B) {
// TODO: Add in N=1-100 tests once Go1.6 support is removed.
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