snapshot of https://github.com/grpc/grpc-go.git (master, 2026-09-15; blobs > 131072B omitted)

internal/metadata/metadata_test.go

@@ -0,0 +1,117 @@
+/*
+ *
+ * Copyright 2020 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 (
+	"errors"
+	"reflect"
+	"testing"
+
+	"github.com/google/go-cmp/cmp"
+	"google.golang.org/grpc/attributes"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/resolver"
+)
+
+func TestGet(t *testing.T) {
+	tests := []struct {
+		name string
+		addr resolver.Address
+		want metadata.MD
+	}{
+		{
+			name: "not set",
+			addr: resolver.Address{},
+			want: nil,
+		},
+		{
+			name: "not set",
+			addr: resolver.Address{
+				Attributes: attributes.New(mdKey, mdValue(metadata.Pairs("k", "v"))),
+			},
+			want: metadata.Pairs("k", "v"),
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := Get(tt.addr); !cmp.Equal(got, tt.want) {
+				t.Errorf("Get() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestSet(t *testing.T) {
+	tests := []struct {
+		name string
+		addr resolver.Address
+		md   metadata.MD
+	}{
+		{
+			name: "unset before",
+			addr: resolver.Address{},
+			md:   metadata.Pairs("k", "v"),
+		},
+		{
+			name: "set before",
+			addr: resolver.Address{
+				Attributes: attributes.New(mdKey, mdValue(metadata.Pairs("bef", "ore"))),
+			},
+			md: metadata.Pairs("k", "v"),
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			newAddr := Set(tt.addr, tt.md)
+			newMD := Get(newAddr)
+			if !cmp.Equal(newMD, tt.md) {
+				t.Errorf("md after Set() = %v, want %v", newMD, tt.md)
+			}
+		})
+	}
+}
+
+func TestValidate(t *testing.T) {
+	for _, test := range []struct {
+		md   metadata.MD
+		want error
+	}{
+		{
+			md:   map[string][]string{string(rune(0x19)): {"testVal"}},
+			want: errors.New("header key \"\\x19\" contains illegal characters not in [0-9a-z-_.]"),
+		},
+		{
+			md:   map[string][]string{"test": {string(rune(0x19))}},
+			want: errors.New("header key \"test\" contains value with non-printable ASCII characters"),
+		},
+		{
+			md:   map[string][]string{"": {"valid"}},
+			want: errors.New("there is an empty key in the header"),
+		},
+		{
+			md:   map[string][]string{"test-bin": {string(rune(0x19))}},
+			want: nil,
+		},
+	} {
+		err := Validate(test.md)
+		if !reflect.DeepEqual(err, test.want) {
+			t.Errorf("validating metadata which is %v got err :%v, want err :%v", test.md, err, test.want)
+		}
+	}
+}