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

internal/envconfig/envconfig_test.go

@@ -0,0 +1,218 @@
+/*
+ *
+ * Copyright 2022 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 envconfig
+
+import (
+	"os"
+	"testing"
+
+	"google.golang.org/grpc/internal/grpctest"
+)
+
+type s struct {
+	grpctest.Tester
+}
+
+func Test(t *testing.T) {
+	grpctest.RunSubTests(t, s{})
+}
+
+func (s) TestUint64FromEnv(t *testing.T) {
+	var testCases = []struct {
+		name          string
+		val           string
+		def, min, max uint64
+		want          uint64
+	}{
+		{
+			name: "error parsing",
+			val:  "asdf", def: 5, want: 5,
+		}, {
+			name: "unset",
+			val:  "", def: 5, want: 5,
+		}, {
+			name: "too low",
+			val:  "5", min: 10, want: 10,
+		}, {
+			name: "too high",
+			val:  "5", max: 2, want: 2,
+		}, {
+			name: "in range",
+			val:  "17391", def: 13000, min: 12000, max: 18000, want: 17391,
+		},
+	}
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			const testVar = "testvar"
+			if tc.val == "" {
+				os.Unsetenv(testVar)
+			} else {
+				os.Setenv(testVar, tc.val)
+			}
+			if got := uint64FromEnv(testVar, tc.def, tc.min, tc.max); got != tc.want {
+				t.Errorf("uint64FromEnv(%q(=%q), %v, %v, %v) = %v; want %v", testVar, tc.val, tc.def, tc.min, tc.max, got, tc.want)
+			}
+		})
+	}
+}
+
+func (s) TestBoolFromEnv(t *testing.T) {
+	var testCases = []struct {
+		val  string
+		def  bool
+		want bool
+	}{
+		{val: "", def: true, want: true},
+		{val: "", def: false, want: false},
+		{val: "true", def: true, want: true},
+		{val: "true", def: false, want: true},
+		{val: "false", def: true, want: false},
+		{val: "false", def: false, want: false},
+		{val: "asdf", def: true, want: true},
+		{val: "asdf", def: false, want: false},
+	}
+	for _, tc := range testCases {
+		t.Run("", func(t *testing.T) {
+			const testVar = "testvar"
+			if tc.val == "" {
+				os.Unsetenv(testVar)
+			} else {
+				os.Setenv(testVar, tc.val)
+			}
+			if got := boolFromEnv(testVar, tc.def); got != tc.want {
+				t.Errorf("boolFromEnv(%q(=%q), %v) = %v; want %v", testVar, tc.val, tc.def, got, tc.want)
+			}
+		})
+	}
+}
+
+func (s) TestGoroutineLabelsFromEnv(t *testing.T) {
+	var testCases = []struct {
+		name string
+		val  string
+		def  GoroutineLabels
+		want GoroutineLabels
+	}{
+		{
+			name: "unset_env_non-zero_default",
+			val:  "",
+			def:  GoroutineLabelServerMethod,
+			want: GoroutineLabelServerMethod,
+		}, {
+			name: "unset_env_zero_default",
+			val:  "",
+			def:  0,
+			want: 0,
+		}, {
+			name: "force-enable_zero_default",
+			val:  "grpc.method=true",
+			def:  0,
+			want: GoroutineLabelServerMethod,
+		}, {
+			name: "force-enable_zero_default_all_caps",
+			val:  "grpc.method=TRUE",
+			def:  0,
+			want: GoroutineLabelServerMethod,
+		}, {
+			name: "force-enable_zero_default_with_whitespace",
+			val:  " grpc.method\t= true",
+			def:  0,
+			want: GoroutineLabelServerMethod,
+		}, {
+			name: "force-enable_zero_default_with_other_garbage",
+			val:  "grpc.method=true,foobar",
+			def:  0,
+			want: GoroutineLabelServerMethod,
+		}, {
+			name: "force-enable_mixed_case_zero_default_with_other_garbage",
+			val:  "grpc.method=tRuE,foobar",
+			def:  0,
+			want: GoroutineLabelServerMethod,
+		}, {
+			name: "force-disable_zero_default",
+			val:  "grpc.method=false",
+			def:  0,
+			want: 0,
+		}, {
+			name: "force-disable_non-zero_default",
+			val:  "grpc.method=false",
+			def:  GoroutineLabelServerMethod,
+			want: 0,
+		}, {
+			name: "force-disable_non-zero_default_all_caps",
+			val:  "grpc.method=FALSE",
+			def:  GoroutineLabelServerMethod,
+			want: 0,
+		}, {
+			name: "force-disable_non-zero_default_mixed_case",
+			val:  "grpc.method=fAlSe",
+			def:  GoroutineLabelServerMethod,
+			want: 0,
+		}, {
+			name: "unknown_val_no_equal",
+			val:  "grpc.unknown.garbage",
+			def:  GoroutineLabelServerMethod,
+			want: GoroutineLabelServerMethod,
+		}, {
+			name: "unknown_val",
+			val:  "grpc.unknown.garbage=fooble",
+			def:  GoroutineLabelServerMethod,
+			want: GoroutineLabelServerMethod,
+		}, {
+			name: "all_with_empty_default",
+			val:  "all",
+			def:  0,
+			want: AllGoroutineLabels,
+		}, {
+			name: "all_with_server_method_default",
+			val:  "all",
+			def:  GoroutineLabelServerMethod,
+			want: AllGoroutineLabels,
+		}, {
+			name: "none_with_empty_default",
+			val:  "none",
+			def:  0,
+			want: 0,
+		}, {
+			name: "none_with_server_method_default",
+			val:  "none",
+			def:  GoroutineLabelServerMethod,
+			want: 0,
+		}, {
+			name: "unparseable_rhs",
+			val:  "grpc.method=quux",
+			def:  GoroutineLabelServerMethod,
+			want: GoroutineLabelServerMethod,
+		},
+	}
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			const testVar = "testvar"
+			if tc.val == "" {
+				os.Unsetenv(testVar)
+			} else {
+				os.Setenv(testVar, tc.val)
+			}
+			if got := goroutineLabelsFromEnv(testVar, tc.def); got != tc.want {
+				t.Errorf("goroutineLabelsFromEnv(%q(=%q), %v) = %v; want %v", testVar, tc.val, tc.def, got, tc.want)
+			}
+		})
+	}
+
+}