1 files changed, 120 insertions, 0 deletions
diff --git a/internal/processor/txt_test.go b/internal/processor/txt_test.go
new file mode 100644
index 0000000..bb44c28
--- /dev/null
+++ b/internal/processor/txt_test.go
@@ -0,0 +1,120 @@
+package processor
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestStripURLTrailing(t *testing.T) {
+	t.Parallel()
+
+	tests := []struct {
+		name string
+		in   string
+		want string
+	}{
+		{name: "plain", in: "https://example.com", want: "https://example.com"},
+		{name: "trailing period", in: "https://example.com.", want: "https://example.com"},
+		{name: "multiple punctuation", in: "https://a.b/c).", want: "https://a.b/c"},
+		{name: "empty", in: "", want: ""},
+		{name: "only punctuation", in: "...", want: ""},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
+			got := stripURLTrailing(tt.in)
+			if got != tt.want {
+				t.Fatalf("stripURLTrailing(%q) = %q; want %q", tt.in, got, tt.want)
+			}
+		})
+	}
+}
+
+func TestAutolinkLine(t *testing.T) {
+	t.Parallel()
+
+	tests := []struct {
+		name string
+		in   string
+		want string
+	}{
+		{
+			name: "no url escapes",
+			in:   `hello <world>`,
+			want: `hello &lt;world&gt;`,
+		},
+		{
+			name: "single url",
+			in:   "see https://foo.test ok",
+			want: `see <a href="https://foo.test" target="_blank" rel="noopener noreferrer">https://foo.test</a> ok`,
+		},
+		{
+			name: "url with trailing period in prose",
+			in:   "Visit https://foo.test.",
+			want: `Visit <a href="https://foo.test" target="_blank" rel="noopener noreferrer">https://foo.test</a>.`,
+		},
+		{
+			name: "two urls",
+			in:   "a http://a.com b https://b.org c",
+			want: `a <a href="http://a.com" target="_blank" rel="noopener noreferrer">http://a.com</a> b <a href="https://b.org" target="_blank" rel="noopener noreferrer">https://b.org</a> c`,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
+			got := autolinkLine(tt.in)
+			if got != tt.want {
+				t.Fatalf("autolinkLine(%q) = %q; want %q", tt.in, got, tt.want)
+			}
+		})
+	}
+}
+
+func TestFormatParagraph(t *testing.T) {
+	t.Parallel()
+
+	tests := []struct {
+		name string
+		in   string
+		want string
+	}{
+		{
+			name: "single line",
+			in:   "hello",
+			want: "hello",
+		},
+		{
+			name: "line break",
+			in:   "line one\nline two",
+			want: "line one<br>\nline two",
+		},
+		{
+			name: "skips blank lines inside para",
+			in:   "a\n\nb",
+			want: "a<br>\nb",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
+			got := formatParagraph(tt.in)
+			if got != tt.want {
+				t.Fatalf("formatParagraph(%q) = %q; want %q", tt.in, got, tt.want)
+			}
+		})
+	}
+}
+
+func TestFormatParagraph_autolinkMultiline(t *testing.T) {
+	t.Parallel()
+	got := formatParagraph("u https://x.y\nv")
+	if !strings.Contains(got, `<a href="https://x.y"`) {
+		t.Fatalf("expected autolink in multiline paragraph, got %q", got)
+	}
+	if !strings.Contains(got, "<br>") {
+		t.Fatalf("expected br between lines, got %q", got)
+	}
+}