Add test for internal/errors/compressor.go

internal/errors/compressor.go

@@ -18,29 +18,35 @@
 package errors
 
 var (
-	// internal compressor
+	// ErrInvalidCompressionLevel represents a function to generate an error of invalid compression level.
 	ErrInvalidCompressionLevel = func(level int) error {
 		return Errorf("invalid compression level: %d", level)
 	}
 
-	// Compressor
+	// ErrCompressorNameNotFound represents a function to generate an error of compressor not found.
 	ErrCompressorNameNotFound = func(name string) error {
 		return Errorf("compressor %s not found", name)
 	}
 
+	// ErrCompressedDataNotFound returns an error of compressed data is not found.
 	ErrCompressedDataNotFound = New("compressed data not found")
 
+	// ErrDecompressedDataNotFound returns an error of decompressed data is not found.
 	ErrDecompressedDataNotFound = New("decompressed data not found")
 
+	// ErrCompressFailed returns an error of compress failed.
 	ErrCompressFailed = New("compress failed")
 
+	// ErrDecompressFailed returns an error of decompressing failed.
 	ErrDecompressFailed = New("decompress failed")
 
+	// ErrCompressorRegistererIsNotRunning represents a function to generate an error of compressor registerers is not running.
 	ErrCompressorRegistererIsNotRunning = func() error {
-		return Errorf("compressor registerers is not running")
+		return New("compressor registerers is not running")
 	}
 
+	// ErrCompressorRegistererChannelIsFull represents a function to generate an error that compressor registerer channel is full.
 	ErrCompressorRegistererChannelIsFull = func() error {
-		return Errorf("compressor registerer channel is full")
+		return New("compressor registerer channel is full")
 	}
 )

internal/errors/compressor_test.go

@@ -0,0 +1,255 @@
+//
+// Copyright (C) 2019-2020 Vdaas.org Vald team ( kpango, rinx, kmrmt )
+//
+// 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
+//
+//    https://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 errors
+
+import (
+	"math"
+	"testing"
+)
+
+func TestErrInvalidCompressionLevel(t *testing.T) {
+	type args struct {
+		level int
+	}
+	type want struct {
+		want error
+	}
+	type test struct {
+		name       string
+		args       args
+		want       want
+		checkFunc  func(want, error) error
+		beforeFunc func(args)
+		afterFunc  func(args)
+	}
+	defaultCheckFunc := func(w want, got error) error {
+		if !Is(got, w.want) {
+			return Errorf("got: \"%#v\",\n\t\t\t\twant: \"%#v\"", got, w.want)
+		}
+		return nil
+	}
+	tests := []test{
+		{
+			name: "returns error when compression leve is 100",
+			args: args{
+				level: 100,
+			},
+			want: want{
+				want: New("invalid compression level: 100"),
+			},
+		},
+		{
+			name: "returns error when compression leve is 0",
+			args: args{
+				level: 0,
+			},
+			want: want{
+				want: New("invalid compression level: 0"),
+			},
+		},
+		{
+			name: "returns error when compression leve is the maximum number of int",
+			args: args{
+				level: int(math.MaxInt64),
+			},
+			want: want{
+				want: Errorf("invalid compression level: %d", int(math.MaxInt64)),
+			},
+		},
+		{
+			name: "returns error when compression leve is the minimum number of int",
+			args: args{
+				level: int(math.MinInt64),
+			},
+			want: want{
+				want: Errorf("invalid compression level: %d", int(math.MinInt64)),
+			},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(tt *testing.T) {
+			if test.beforeFunc != nil {
+				test.beforeFunc(test.args)
+			}
+			if test.afterFunc != nil {
+				defer test.afterFunc(test.args)
+			}
+			if test.checkFunc == nil {
+				test.checkFunc = defaultCheckFunc
+			}
+
+			got := ErrInvalidCompressionLevel(test.args.level)
+			if err := test.checkFunc(test.want, got); err != nil {
+				tt.Errorf("error = %v", err)
+			}
+		})
+	}
+}
+
+func TestErrCompressorNameNotFound(t *testing.T) {
+	type args struct {
+		name string
+	}
+	type want struct {
+		want error
+	}
+	type test struct {
+		name       string
+		args       args
+		want       want
+		checkFunc  func(want, error) error
+		beforeFunc func(args)
+		afterFunc  func(args)
+	}
+	defaultCheckFunc := func(w want, got error) error {
+		if !Is(got, w.want) {
+			return Errorf("got: \"%#v\",\n\t\t\t\twant: \"%#v\"", got, w.want)
+		}
+		return nil
+	}
+	tests := []test{
+		{
+			name: "returns error when name is `gob`",
+			args: args{
+				name: "gob",
+			},
+			want: want{
+				want: New("compressor gob not found"),
+			},
+		},
+		{
+			name: "returns error when name is empty",
+			args: args{
+				name: "",
+			},
+			want: want{
+				want: New("compressor  not found"),
+			},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(tt *testing.T) {
+			if test.beforeFunc != nil {
+				test.beforeFunc(test.args)
+			}
+			if test.afterFunc != nil {
+				defer test.afterFunc(test.args)
+			}
+			if test.checkFunc == nil {
+				test.checkFunc = defaultCheckFunc
+			}
+
+			got := ErrCompressorNameNotFound(test.args.name)
+			if err := test.checkFunc(test.want, got); err != nil {
+				tt.Errorf("error = %v", err)
+			}
+		})
+	}
+}
+
+func TestErrCompressorRegistererIsNotRunning(t *testing.T) {
+	type want struct {
+		want error
+	}
+	type test struct {
+		name       string
+		want       want
+		checkFunc  func(want, error) error
+		beforeFunc func()
+		afterFunc  func()
+	}
+	defaultCheckFunc := func(w want, got error) error {
+		if !Is(got, w.want) {
+			return Errorf("got: \"%#v\",\n\t\t\t\twant: \"%#v\"", got, w.want)
+		}
+		return nil
+	}
+	tests := []test{
+		{
+			name: "returns error",
+			want: want{
+				want: New("compressor registerers is not running"),
+			},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(tt *testing.T) {
+			if test.beforeFunc != nil {
+				test.beforeFunc()
+			}
+			if test.afterFunc != nil {
+				defer test.afterFunc()
+			}
+			if test.checkFunc == nil {
+				test.checkFunc = defaultCheckFunc
+			}
+
+			got := ErrCompressorRegistererIsNotRunning()
+			if err := test.checkFunc(test.want, got); err != nil {
+				tt.Errorf("error = %v", err)
+			}
+		})
+	}
+}
+
+func TestErrCompressorRegistererChannelIsFull(t *testing.T) {
+	type want struct {
+		want error
+	}
+	type test struct {
+		name       string
+		want       want
+		checkFunc  func(want, error) error
+		beforeFunc func()
+		afterFunc  func()
+	}
+	defaultCheckFunc := func(w want, got error) error {
+		if !Is(got, w.want) {
+			return Errorf("got: \"%#v\",\n\t\t\t\twant: \"%#v\"", got, w.want)
+		}
+		return nil
+	}
+	tests := []test{
+		{
+			name: "returns error",
+			want: want{
+				want: New("compressor registerer channel is full"),
+			},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(tt *testing.T) {
+			if test.beforeFunc != nil {
+				test.beforeFunc()
+			}
+			if test.afterFunc != nil {
+				defer test.afterFunc()
+			}
+			if test.checkFunc == nil {
+				test.checkFunc = defaultCheckFunc
+			}
+
+			got := ErrCompressorRegistererChannelIsFull()
+			if err := test.checkFunc(test.want, got); err != nil {
+				tt.Errorf("error = %v", err)
+			}
+		})
+	}
+}