add tests for release filter

changelog_test.go

@@ -0,0 +1,147 @@
+package main
+
+import (
+	"fmt"
+	"regexp"
+	"testing"
+
+	"github.com/google/go-cmp/cmp"
+	"github.com/google/go-github/v66/github"
+)
+
+func TestConfigFilterReleases(t *testing.T) {
+	release := func(draft, prerelease bool, tag, desc string) *github.RepositoryRelease {
+		return &github.RepositoryRelease{
+			Draft:      &draft,
+			Prerelease: &prerelease,
+			Name:       &desc,
+			TagName:    &tag,
+		}
+	}
+
+	releases := []*github.RepositoryRelease{
+		release(false, false, "no-draft-no-prerel", "no draft, no prerelease"),
+		release(true, false, "draft-no-prerel", "draft, no prerelease"),
+		release(false, true, "no-draft-prerel", "no draft, prerelease"),
+		release(true, true, "draft-prerel", "draft, prerelease"),
+	}
+
+	tests := []struct {
+		cfg  Config
+		want []string
+	}{
+		{
+			cfg: Config{},
+			want: []string{
+				"no draft, no prerelease",
+			},
+		},
+		{
+			cfg: Config{
+				Drafts: true,
+			},
+			want: []string{
+				"no draft, no prerelease",
+				"draft, no prerelease",
+			},
+		},
+		{
+			cfg: Config{
+				Prerelease: true,
+			},
+			want: []string{
+				"no draft, no prerelease",
+				"no draft, prerelease",
+			},
+		},
+		{
+			cfg: Config{
+				Drafts:     true,
+				Prerelease: true,
+			},
+			want: []string{
+				"no draft, no prerelease",
+				"draft, no prerelease",
+				"no draft, prerelease",
+				"draft, prerelease",
+			},
+		},
+		{
+			cfg: Config{
+				Drafts:     true,
+				Prerelease: true,
+				Ignore:     regexp.MustCompile(`^draft-`),
+			},
+			want: []string{
+				"no draft, no prerelease",
+				"no draft, prerelease",
+			},
+		},
+		{
+			cfg: Config{
+				Drafts:     true,
+				Prerelease: true,
+				Extract:    regexp.MustCompile(`^draft-`),
+			},
+			want: []string{
+				"draft, no prerelease",
+				"draft, prerelease",
+			},
+		},
+		{
+			cfg: Config{
+				Drafts:     true,
+				Prerelease: true,
+				Ignore:     regexp.MustCompile(`.*`),
+			},
+			want: nil,
+		},
+		{
+			cfg: Config{
+				Drafts:     true,
+				Prerelease: true,
+				Extract:    regexp.MustCompile(`this-regex-never-matches`),
+			},
+			want: nil,
+		},
+		{
+			cfg: Config{
+				Drafts:     true,
+				Prerelease: true,
+				Ignore:     regexp.MustCompile(`^draft-`),
+				Extract:    regexp.MustCompile(`-no-prerel$`),
+			},
+			want: []string{
+				"no draft, no prerelease",
+			},
+		},
+		{
+			cfg: Config{
+				Drafts:     true,
+				Prerelease: true,
+				Ignore:     regexp.MustCompile(`this-does-not-match`),
+				Extract:    regexp.MustCompile(`.*`),
+			},
+			want: []string{
+				"no draft, no prerelease",
+				"draft, no prerelease",
+				"no draft, prerelease",
+				"draft, prerelease",
+			},
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(fmt.Sprintf("%#v", tc.cfg), func(t *testing.T) {
+			rels := append([]*github.RepositoryRelease{}, releases...) // t.Run runs tests in parallel
+			var have []string
+			for _, r := range tc.cfg.filterReleases(rels) {
+				have = append(have, r.GetName())
+			}
+
+			if !cmp.Equal(have, tc.want) {
+				t.Fatal(cmp.Diff(have, tc.want), have)
+			}
+		})
+	}
+}