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- /*
- *
- * Copyright 2014 gRPC authors.
- *
- * 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
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
- package metadata
-
- import (
- "context"
- "reflect"
- "strconv"
- "testing"
- )
-
- func TestPairsMD(t *testing.T) {
- for _, test := range []struct {
- // input
- kv []string
- // output
- md MD
- }{
- {[]string{}, MD{}},
- {[]string{"k1", "v1", "k1", "v2"}, MD{"k1": []string{"v1", "v2"}}},
- } {
- md := Pairs(test.kv...)
- if !reflect.DeepEqual(md, test.md) {
- t.Fatalf("Pairs(%v) = %v, want %v", test.kv, md, test.md)
- }
- }
- }
-
- func TestCopy(t *testing.T) {
- const key, val = "key", "val"
- orig := Pairs(key, val)
- cpy := orig.Copy()
- if !reflect.DeepEqual(orig, cpy) {
- t.Errorf("copied value not equal to the original, got %v, want %v", cpy, orig)
- }
- orig[key][0] = "foo"
- if v := cpy[key][0]; v != val {
- t.Errorf("change in original should not affect copy, got %q, want %q", v, val)
- }
- }
-
- func TestJoin(t *testing.T) {
- for _, test := range []struct {
- mds []MD
- want MD
- }{
- {[]MD{}, MD{}},
- {[]MD{Pairs("foo", "bar")}, Pairs("foo", "bar")},
- {[]MD{Pairs("foo", "bar"), Pairs("foo", "baz")}, Pairs("foo", "bar", "foo", "baz")},
- {[]MD{Pairs("foo", "bar"), Pairs("foo", "baz"), Pairs("zip", "zap")}, Pairs("foo", "bar", "foo", "baz", "zip", "zap")},
- } {
- md := Join(test.mds...)
- if !reflect.DeepEqual(md, test.want) {
- t.Errorf("context's metadata is %v, want %v", md, test.want)
- }
- }
- }
-
- func TestGet(t *testing.T) {
- for _, test := range []struct {
- md MD
- key string
- wantVals []string
- }{
- {md: Pairs("My-Optional-Header", "42"), key: "My-Optional-Header", wantVals: []string{"42"}},
- {md: Pairs("Header", "42", "Header", "43", "Header", "44", "other", "1"), key: "HEADER", wantVals: []string{"42", "43", "44"}},
- {md: Pairs("HEADER", "10"), key: "HEADER", wantVals: []string{"10"}},
- } {
- vals := test.md.Get(test.key)
- if !reflect.DeepEqual(vals, test.wantVals) {
- t.Errorf("value of metadata %v is %v, want %v", test.key, vals, test.wantVals)
- }
- }
- }
-
- func TestSet(t *testing.T) {
- for _, test := range []struct {
- md MD
- setKey string
- setVals []string
- want MD
- }{
- {
- md: Pairs("My-Optional-Header", "42", "other-key", "999"),
- setKey: "Other-Key",
- setVals: []string{"1"},
- want: Pairs("my-optional-header", "42", "other-key", "1"),
- },
- {
- md: Pairs("My-Optional-Header", "42"),
- setKey: "Other-Key",
- setVals: []string{"1", "2", "3"},
- want: Pairs("my-optional-header", "42", "other-key", "1", "other-key", "2", "other-key", "3"),
- },
- {
- md: Pairs("My-Optional-Header", "42"),
- setKey: "Other-Key",
- setVals: []string{},
- want: Pairs("my-optional-header", "42"),
- },
- } {
- test.md.Set(test.setKey, test.setVals...)
- if !reflect.DeepEqual(test.md, test.want) {
- t.Errorf("value of metadata is %v, want %v", test.md, test.want)
- }
- }
- }
-
- func TestAppend(t *testing.T) {
- for _, test := range []struct {
- md MD
- appendKey string
- appendVals []string
- want MD
- }{
- {
- md: Pairs("My-Optional-Header", "42"),
- appendKey: "Other-Key",
- appendVals: []string{"1"},
- want: Pairs("my-optional-header", "42", "other-key", "1"),
- },
- {
- md: Pairs("My-Optional-Header", "42"),
- appendKey: "my-OptIoNal-HeAder",
- appendVals: []string{"1", "2", "3"},
- want: Pairs("my-optional-header", "42", "my-optional-header", "1",
- "my-optional-header", "2", "my-optional-header", "3"),
- },
- {
- md: Pairs("My-Optional-Header", "42"),
- appendKey: "my-OptIoNal-HeAder",
- appendVals: []string{},
- want: Pairs("my-optional-header", "42"),
- },
- } {
- test.md.Append(test.appendKey, test.appendVals...)
- if !reflect.DeepEqual(test.md, test.want) {
- t.Errorf("value of metadata is %v, want %v", test.md, test.want)
- }
- }
- }
-
- func TestAppendToOutgoingContext(t *testing.T) {
- // Pre-existing metadata
- ctx := NewOutgoingContext(context.Background(), Pairs("k1", "v1", "k2", "v2"))
- ctx = AppendToOutgoingContext(ctx, "k1", "v3")
- ctx = AppendToOutgoingContext(ctx, "k1", "v4")
- md, ok := FromOutgoingContext(ctx)
- if !ok {
- t.Errorf("Expected MD to exist in ctx, but got none")
- }
- want := Pairs("k1", "v1", "k1", "v3", "k1", "v4", "k2", "v2")
- if !reflect.DeepEqual(md, want) {
- t.Errorf("context's metadata is %v, want %v", md, want)
- }
-
- // No existing metadata
- ctx = AppendToOutgoingContext(context.Background(), "k1", "v1")
- md, ok = FromOutgoingContext(ctx)
- if !ok {
- t.Errorf("Expected MD to exist in ctx, but got none")
- }
- want = Pairs("k1", "v1")
- if !reflect.DeepEqual(md, want) {
- t.Errorf("context's metadata is %v, want %v", md, want)
- }
- }
-
- func TestAppendToOutgoingContext_Repeated(t *testing.T) {
- ctx := context.Background()
-
- for i := 0; i < 100; i = i + 2 {
- ctx1 := AppendToOutgoingContext(ctx, "k", strconv.Itoa(i))
- ctx2 := AppendToOutgoingContext(ctx, "k", strconv.Itoa(i+1))
-
- md1, _ := FromOutgoingContext(ctx1)
- md2, _ := FromOutgoingContext(ctx2)
-
- if reflect.DeepEqual(md1, md2) {
- t.Fatalf("md1, md2 = %v, %v; should not be equal", md1, md2)
- }
-
- ctx = ctx1
- }
- }
-
- func TestAppendToOutgoingContext_FromKVSlice(t *testing.T) {
- const k, v = "a", "b"
- kv := []string{k, v}
- ctx := AppendToOutgoingContext(context.Background(), kv...)
- md, _ := FromOutgoingContext(ctx)
- if md[k][0] != v {
- t.Fatalf("md[%q] = %q; want %q", k, md[k], v)
- }
- kv[1] = "xxx"
- md, _ = FromOutgoingContext(ctx)
- if md[k][0] != v {
- t.Fatalf("md[%q] = %q; want %q", k, md[k], v)
- }
- }
-
- // 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.
- const num = 10
- for n := 0; n < b.N; n++ {
- ctx := context.Background()
- for i := 0; i < num; i++ {
- md, _ := FromOutgoingContext(ctx)
- NewOutgoingContext(ctx, Join(Pairs("k1", "v1", "k2", "v2"), md))
- }
- }
- }
-
- // Newer/faster approach to adding metadata to context
- func BenchmarkAppendToOutgoingContext(b *testing.B) {
- const num = 10
- for n := 0; n < b.N; n++ {
- ctx := context.Background()
- for i := 0; i < num; i++ {
- ctx = AppendToOutgoingContext(ctx, "k1", "v1", "k2", "v2")
- }
- }
- }
-
- func BenchmarkFromOutgoingContext(b *testing.B) {
- ctx := context.Background()
- ctx = NewOutgoingContext(ctx, MD{"k3": {"v3", "v4"}})
- ctx = AppendToOutgoingContext(ctx, "k1", "v1", "k2", "v2")
-
- for n := 0; n < b.N; n++ {
- FromOutgoingContext(ctx)
- }
- }
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