(new): tgfmt package

(fix): formatting helpers
(ci/cd): go checks
(tests): tgfmt coverage

tgfmt/md_test.go

@@ -0,0 +1,36 @@
+package tgfmt
+
+import "testing"
+
+func TestEscapeMarkdown(t *testing.T) {
+	got := EscapeMarkdown("a_b*c[1]`x`")
+	want := Markdown("a\\_b\\*c\\[1]\\`x\\`")
+
+	if got != want {
+		t.Fatalf("EscapeMarkdown() = %q, want %q", got, want)
+	}
+}
+
+func TestMarkdownFormattingMethods(t *testing.T) {
+	tests := []struct {
+		name string
+		got  Markdown
+		want Markdown
+	}{
+		{name: "bold", got: EscapeMarkdown("text").Bold(), want: "*text*"},
+		{name: "italic", got: EscapeMarkdown("text").Italic(), want: "_text_"},
+		{name: "link", got: EscapeMarkdown("Laniakea").Link("https://example.test"), want: "[Laniakea](https://example.test)"},
+		{name: "mention", got: EscapeMarkdown("User").Mention(123), want: "[User](tg://user?id=123)"},
+		{name: "inline code", got: EscapeMarkdown("text").InlineCode(), want: "`text`"},
+		{name: "block code", got: EscapeMarkdown("text").BlockCode(), want: "```\ntext\n```"},
+		{name: "block code language", got: EscapeMarkdown("text").BlockCodeLanguage("go"), want: "```go\ntext\n```"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if tt.got != tt.want {
+				t.Fatalf("formatted Markdown = %q, want %q", tt.got, tt.want)
+			}
+		})
+	}
+}