Show reactions to threads

tui_test.go

@@ -926,6 +926,61 @@ func TestReviewAnchorUsesCommentSnapshotCoordinates(t *testing.T) {
 	}
 }
 
+func TestThreadDetailShowsCommentReactions(t *testing.T) {
+	m := NewApp(nil, "o", "r", false, 50, 10*time.Second)
+	m.width = 80
+	m.details = PRDetails{Threads: []ReviewThread{{
+		ID: "thread", Path: "main.go", Comments: []ReviewComment{{
+			ID: "comment", Author: "reviewer", Body: "Please change this.",
+			Reactions: []ReactionSummary{
+				{Content: "THUMBS_UP", Count: 3, ViewerHasReacted: true},
+				{Content: "EYES", Count: 1},
+				{Content: "HEART", Count: 2},
+			},
+		}},
+	}}}
+
+	var rendered strings.Builder
+	reactionLines := 0
+	for _, line := range m.detailLines(50) {
+		rendered.WriteString(ansi.Strip(line.rail + line.text))
+		rendered.WriteByte('\n')
+		if strings.Contains(line.anchor, ":reactions:") {
+			reactionLines++
+			if ansi.StringWidth(line.text) > 46 {
+				t.Fatalf("reaction line exceeds detail width: %q", ansi.Strip(line.text))
+			}
+		}
+	}
+	plain := rendered.String()
+	for _, wanted := range []string{"Please change this.", "👍 3", "👀 1", "❤️ 2"} {
+		if !strings.Contains(plain, wanted) {
+			t.Fatalf("thread detail is missing %q:\n%s", wanted, plain)
+		}
+	}
+	if reactionLines == 0 {
+		t.Fatalf("reactions were not attached to their comment:\n%s", plain)
+	}
+}
+
+func TestReactionSummaryWrapsBetweenBadges(t *testing.T) {
+	reactions := []ReactionSummary{
+		{Content: "THUMBS_UP", Count: 10},
+		{Content: "THUMBS_DOWN", Count: 2},
+		{Content: "LAUGH", Count: 4},
+		{Content: "HOORAY", Count: 7},
+	}
+	lines := renderReactionSummary(reactions, 12)
+	if len(lines) < 2 {
+		t.Fatalf("reaction badges did not wrap: %#v", lines)
+	}
+	for _, line := range lines {
+		if width := ansi.StringWidth(line); width > 12 {
+			t.Fatalf("reaction line width = %d: %q", width, ansi.Strip(line))
+		}
+	}
+}
+
 func TestOutdatedDetailHighlightsOriginalCodeRange(t *testing.T) {
 	m := NewApp(nil, "o", "r", false, 50, 10*time.Second)
 	m.width = 100