feat: add Result type with JSON schema and validation

internal/exec/result_test.go

@@ -0,0 +1,71 @@
+package exec_test
+
+import (
+	"encoding/json"
+	"testing"
+
+	"github.com/mathiasbq/supervisor/internal/exec"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestResultParsesValidJSON(t *testing.T) {
+	raw := `{
+		"status": "pass",
+		"phase": "red",
+		"skill": "tdd",
+		"file_path": "/tmp/foo_test.go",
+		"runner_output": "--- FAIL: TestFoo",
+		"verified": true,
+		"model_used": "self",
+		"message": "test fails as expected"
+	}`
+	var r exec.Result
+	require.NoError(t, json.Unmarshal([]byte(raw), &r))
+	assert.Equal(t, "pass", r.Status)
+	assert.Equal(t, "red", r.Phase)
+	assert.True(t, r.Verified)
+}
+
+func TestResultValidation(t *testing.T) {
+	tests := []struct {
+		name    string
+		result  exec.Result
+		wantErr bool
+	}{
+		{
+			name: "valid pass result",
+			result: exec.Result{
+				Status: "pass", Phase: "red", Skill: "tdd",
+				FilePath: "/tmp/x_test.go", RunnerOutput: "FAIL",
+				Verified: true, ModelUsed: "self", Message: "ok",
+			},
+			wantErr: false,
+		},
+		{
+			name:    "empty status",
+			result:  exec.Result{Phase: "red", Skill: "tdd"},
+			wantErr: true,
+		},
+		{
+			name:    "invalid status",
+			result:  exec.Result{Status: "unknown", Phase: "red", Skill: "tdd"},
+			wantErr: true,
+		},
+		{
+			name:    "invalid phase",
+			result:  exec.Result{Status: "pass", Phase: "bad", Skill: "tdd"},
+			wantErr: true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			err := tt.result.Validate()
+			if tt.wantErr {
+				assert.Error(t, err)
+			} else {
+				assert.NoError(t, err)
+			}
+		})
+	}
+}