test(changelog): unit test for changelog with markdown

pkg/changelog/markdown.go

@@ -112,7 +112,7 @@ func (g *MarkdownGenerator) getOldNodes() []markdown.Node {
 
 	result = append(result, markdown.Parse(lines)...)
 
-	// remove title
+	// remove title as we will add later
 	if len(result) > 0 && markdown.Equal(result[0], markdown.NewHeader(firstLevel, title)) {
 		result = result[1:]
 	}

pkg/changelog/markdown_test.go

@@ -0,0 +1,48 @@
+package changelog
+
+import (
+	"testing"
+	"time"
+
+	"github.com/haunt98/changeloguru/pkg/convention"
+	"github.com/sebdah/goldie/v2"
+)
+
+func TestMarkdownGeneratorGenerate(t *testing.T) {
+	tests := []struct {
+		name    string
+		oldData string
+		version string
+		t       time.Time
+		commits []convention.Commit
+	}{
+		{
+			name:    "empty old data",
+			version: "v1.0.0",
+			t:       time.Date(2020, 1, 18, 0, 0, 0, 0, time.Local),
+			commits: []convention.Commit{
+				{
+					RawHeader: "feat: new feature",
+					Type:      convention.FeatType,
+				},
+				{
+					RawHeader: "fix: new fix",
+					Type:      convention.FixType,
+				},
+				{
+					RawHeader: "chore: new build",
+					Type:      convention.ChoreType,
+				},
+			},
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			g := goldie.New(t)
+			markdownGenerator := NewMarkdownGenerator(tc.oldData, tc.version, tc.t)
+			got := markdownGenerator.Generate(tc.commits)
+			g.Assert(t, t.Name(), []byte(got))
+		})
+	}
+}

pkg/changelog/testdata/TestMarkdownGeneratorGenerate/empty_old_data.golden

@@ -0,0 +1,15 @@
+# CHANGELOG
+
+## v1.0.0 (2020-1-18)
+
+### Added
+
+- feat: new feature
+
+### Fixed
+
+- feat: new feature
+
+### Others
+
+- chore: new build

pkg/markdown/parse.go

@@ -10,6 +10,8 @@ func Parse(lines []string) []Node {
 	bases := make([]Node, 0, defaultBaseLen)
 
 	for _, line := range lines {
+		line = strings.TrimSpace(line)
+
 		if line == "" {
 			continue
 		}