chore: import clean Agent Desk snapshot (2/7)

internal/ai/runtime/tooling/tool_result_reducer_test.go

@@ -0,0 +1,99 @@
+package tooling
+
+import (
+	"strings"
+	"testing"
+
+	"agent-desk/internal/ai/mcps"
+)
+
+func TestBuildReducedToolResultSummaryDeduplicatesStructuredAndTextContent(t *testing.T) {
+	result := &mcps.ToolCallResult{
+		StructuredContent: map[string]any{
+			"timestamp": "2026-07-28 11:51:52",
+			"timezone":  "Local",
+		},
+		Content: []mcps.ToolResultContent{{
+			Type: "text",
+			Text: `{"timezone":"Local","timestamp":"2026-07-28 11:51:52"}`,
+		}},
+	}
+
+	summary := BuildReducedToolResultSummary(result)
+	if strings.Count(summary, "timestamp") != 1 {
+		t.Fatalf("duplicate MCP result was not removed: %q", summary)
+	}
+	if summary != `{"timestamp":"2026-07-28 11:51:52","timezone":"Local"}` {
+		t.Fatalf("unexpected reduced result: %q", summary)
+	}
+}
+
+func TestBuildReducedToolResultSummaryKeepsDistinctSegments(t *testing.T) {
+	result := &mcps.ToolCallResult{
+		StructuredContent: map[string]any{"status": "ok"},
+		Content: []mcps.ToolResultContent{{
+			Type: "text",
+			Text: "additional context",
+		}},
+	}
+
+	summary := BuildReducedToolResultSummary(result)
+	if !strings.Contains(summary, `{"status":"ok"}`) || !strings.Contains(summary, "additional context") {
+		t.Fatalf("distinct MCP result segments were lost: %q", summary)
+	}
+}
+
+func TestBuildReducedToolResultSummaryTruncatesAt2500Runes(t *testing.T) {
+	longText := strings.Repeat("x", 3000)
+	result := &mcps.ToolCallResult{
+		Content: []mcps.ToolResultContent{{
+			Type: "text",
+			Text: longText,
+		}},
+	}
+
+	summary := BuildReducedToolResultSummary(result)
+	expectedMarker := "[tool result reduced: original_length=3000, kept_length=2500]"
+	if !strings.Contains(summary, expectedMarker) {
+		t.Fatalf("expected reduction marker %q in summary, got: %q", expectedMarker, summary)
+	}
+
+	info := ParseReductionInfo(summary)
+	if !info.Reduced || info.OriginalChars != 3000 || info.KeptChars != 2500 {
+		t.Fatalf("unexpected ReductionInfo: %+v", info)
+	}
+
+	// Exactly 2500 runes should not be reduced
+	exactText := strings.Repeat("y", 2500)
+	exactResult := &mcps.ToolCallResult{
+		Content: []mcps.ToolResultContent{{
+			Type: "text",
+			Text: exactText,
+		}},
+	}
+	exactSummary := BuildReducedToolResultSummary(exactResult)
+	if strings.Contains(exactSummary, "[tool result reduced:") {
+		t.Fatalf("2500-rune payload should not be reduced, got: %q", exactSummary)
+	}
+	if exactSummary != exactText {
+		t.Fatalf("expected exact text, got length %d", len(exactSummary))
+	}
+
+	// Multibyte runes test
+	chineseText := strings.Repeat("测", 2600)
+	chineseResult := &mcps.ToolCallResult{
+		Content: []mcps.ToolResultContent{{
+			Type: "text",
+			Text: chineseText,
+		}},
+	}
+	chineseSummary := BuildReducedToolResultSummary(chineseResult)
+	expectedChineseMarker := "[tool result reduced: original_length=2600, kept_length=2500]"
+	if !strings.Contains(chineseSummary, expectedChineseMarker) {
+		t.Fatalf("expected multibyte reduction marker %q, got: %q", expectedChineseMarker, chineseSummary)
+	}
+	chineseInfo := ParseReductionInfo(chineseSummary)
+	if !chineseInfo.Reduced || chineseInfo.OriginalChars != 2600 || chineseInfo.KeptChars != 2500 {
+		t.Fatalf("unexpected chinese ReductionInfo: %+v", chineseInfo)
+	}
+}