1 files changed, 114 insertions, 0 deletions
diff --git a/internal/reporter/reporter_test.go b/internal/reporter/reporter_test.go
new file mode 100644
index 0000000..1ddce23
--- /dev/null
+++ b/internal/reporter/reporter_test.go
@@ -0,0 +1,114 @@
+package reporter
+
+import (
+	"bytes"
+	"encoding/json"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/claudomator/claudomator/internal/storage"
+)
+
+func sampleExecutions() []*storage.Execution {
+	now := time.Date(2026, 2, 8, 10, 0, 0, 0, time.UTC)
+	return []*storage.Execution{
+		{
+			ID: "exec-1", TaskID: "task-1", Status: "COMPLETED",
+			StartTime: now, EndTime: now.Add(2 * time.Minute),
+			ExitCode: 0, CostUSD: 0.25,
+		},
+		{
+			ID: "exec-2", TaskID: "task-2", Status: "FAILED",
+			StartTime: now, EndTime: now.Add(30 * time.Second),
+			ExitCode: 1, CostUSD: 0.10, ErrorMsg: "something broke",
+		},
+	}
+}
+
+func TestConsoleReporter_WithExecutions(t *testing.T) {
+	r := &ConsoleReporter{}
+	var buf bytes.Buffer
+	err := r.Generate(&buf, sampleExecutions())
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+
+	output := buf.String()
+	if !strings.Contains(output, "COMPLETED") {
+		t.Error("missing COMPLETED status")
+	}
+	if !strings.Contains(output, "FAILED") {
+		t.Error("missing FAILED status")
+	}
+	if !strings.Contains(output, "1 completed, 1 failed") {
+		t.Errorf("missing summary in output: %s", output)
+	}
+	if !strings.Contains(output, "$0.3500") {
+		t.Errorf("missing total cost in output: %s", output)
+	}
+}
+
+func TestConsoleReporter_Empty(t *testing.T) {
+	r := &ConsoleReporter{}
+	var buf bytes.Buffer
+	r.Generate(&buf, []*storage.Execution{})
+	if !strings.Contains(buf.String(), "No executions") {
+		t.Error("expected 'No executions' message")
+	}
+}
+
+func TestJSONReporter(t *testing.T) {
+	r := &JSONReporter{Pretty: false}
+	var buf bytes.Buffer
+	err := r.Generate(&buf, sampleExecutions())
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	var result []storage.Execution
+	if err := json.Unmarshal(buf.Bytes(), &result); err != nil {
+		t.Fatalf("invalid JSON: %v", err)
+	}
+	if len(result) != 2 {
+		t.Errorf("want 2 results, got %d", len(result))
+	}
+	if result[0].Status != "COMPLETED" {
+		t.Errorf("want COMPLETED, got %q", result[0].Status)
+	}
+}
+
+func TestJSONReporter_Pretty(t *testing.T) {
+	r := &JSONReporter{Pretty: true}
+	var buf bytes.Buffer
+	r.Generate(&buf, sampleExecutions())
+	if !strings.Contains(buf.String(), "  ") {
+		t.Error("expected indented JSON")
+	}
+}
+
+func TestHTMLReporter(t *testing.T) {
+	r := &HTMLReporter{}
+	var buf bytes.Buffer
+	err := r.Generate(&buf, sampleExecutions())
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	html := buf.String()
+	if !strings.Contains(html, "<!DOCTYPE html>") {
+		t.Error("missing DOCTYPE")
+	}
+	if !strings.Contains(html, "Claudomator Report") {
+		t.Error("missing title")
+	}
+	if !strings.Contains(html, "COMPLETED") {
+		t.Error("missing COMPLETED status")
+	}
+	if !strings.Contains(html, "FAILED") {
+		t.Error("missing FAILED status")
+	}
+	if !strings.Contains(html, "$0.3500") {
+		t.Error("missing total cost")
+	}
+}