test(semantic-release): add tests for WriteChangelog

pkg/semanticrelease/semantic-release_test.go

@@ -0,0 +1,83 @@
+package semanticrelease
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/Nightapes/go-semantic-release/pkg/config"
+)
+
+func TestSemanticRelease_WriteChangeLog(t *testing.T) {
+
+	type args struct {
+		changelogContent     string
+		file                 string
+		overwrite            bool
+		maxChangelogFileSize int64
+	}
+	tests := []struct {
+		config  *config.ReleaseConfig
+		name    string
+		args    args
+		wantErr bool
+	}{
+		{
+			name: "MoveExisting",
+			args: args{
+				changelogContent:     "go-semantic-release-rocks!",
+				file:                 "test1.changelog.md",
+				overwrite:            false,
+				maxChangelogFileSize: 0,
+			},
+			wantErr: false,
+		},
+		{
+			name: "ValidWithOverwrite",
+			args: args{
+				changelogContent:     "go-semantic-release-rocks!",
+				file:                 "test2.changelog.md",
+				overwrite:            true,
+				maxChangelogFileSize: 0,
+			},
+			wantErr: false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			_, err := os.Create(tt.args.file)
+			if err != nil {
+				t.Error(err)
+			}
+
+			releaser := &SemanticRelease{}
+			if err := releaser.WriteChangeLog(tt.args.changelogContent, tt.args.file, tt.args.overwrite, tt.args.maxChangelogFileSize); (err != nil) != tt.wantErr {
+				t.Errorf("WriteChangeLog() error = %v, wantErr %v", err, tt.wantErr)
+			}
+
+			name := strings.Join(strings.Split(tt.args.file, ".")[:len(strings.Split(tt.args.file, "."))-1], ".")
+
+			files, err := filepath.Glob("./" + name + "*")
+			if err != nil {
+				t.Error(err)
+			}
+
+			if !tt.wantErr && !tt.args.overwrite && tt.args.maxChangelogFileSize == 0 && len(files) <= 1 {
+				t.Errorf("WriteChangelog() = should create a copy of the existing changelog file")
+			}
+
+			if !tt.wantErr && tt.args.overwrite && len(files) > 1 {
+				t.Errorf("WriteChangelog() = should not create a copy of the changelog file")
+			}
+
+			for _, i := range files {
+				err := os.Remove(i)
+				if err != nil {
+					t.Error(err)
+				}
+			}
+		})
+	}
+}