| 1 | package plugin |
| 2 | |
| 3 | import ( |
| 4 | "encoding/base64" |
| 5 | "encoding/json" |
| 6 | "strings" |
| 7 | "testing" |
| 8 | ) |
| 9 | |
| 10 | func imageItem(mime, data string) string { |
| 11 | b, _ := json.Marshal(map[string]string{"type": "image", "data": data, "mimeType": mime}) |
| 12 | return string(b) |
| 13 | } |
| 14 | |
| 15 | func TestParseToolResultImageItem(t *testing.T) { |
| 16 | payload := base64.StdEncoding.EncodeToString([]byte("png-bytes")) |
| 17 | res := `{"content":[{"type":"text","text":"before "},` + imageItem("image/png", payload) + `,{"type":"text","text":" after"}]}` |
| 18 | text, images, err := parseToolResult(json.RawMessage(res)) |
| 19 | if err != nil { |
| 20 | t.Fatalf("parseToolResult: %v", err) |
| 21 | } |
| 22 | if want := "before [image: image/png] after"; text != want { |
| 23 | t.Fatalf("text = %q, want %q", text, want) |
| 24 | } |
| 25 | if len(images) != 1 || images[0] != "data:image/png;base64,"+payload { |
| 26 | t.Fatalf("images = %v, want one png data URL", images) |
| 27 | } |
| 28 | } |
| 29 | |
| 30 | func TestParseToolResultImageDefaultsToPNG(t *testing.T) { |
| 31 | payload := base64.StdEncoding.EncodeToString([]byte("x")) |
| 32 | res := `{"content":[{"type":"image","data":"` + payload + `"}]}` |
| 33 | text, images, err := parseToolResult(json.RawMessage(res)) |
| 34 | if err != nil { |
| 35 | t.Fatalf("parseToolResult: %v", err) |
| 36 | } |
| 37 | if text != "[image: image/png]" { |
| 38 | t.Fatalf("text = %q, want png placeholder", text) |
| 39 | } |
| 40 | if len(images) != 1 || !strings.HasPrefix(images[0], "data:image/png;base64,") { |
| 41 | t.Fatalf("images = %v, want png data URL", images) |
| 42 | } |
| 43 | } |
| 44 | |
| 45 | func TestParseToolResultImageNormalizesWrappedBase64(t *testing.T) { |
| 46 | payload := base64.StdEncoding.EncodeToString([]byte("png-bytes")) |
| 47 | wrapped := payload[:4] + "\n" + payload[4:8] + " " + payload[8:] |
| 48 | res := `{"content":[` + imageItem("image/png", wrapped) + `]}` |
| 49 | _, images, err := parseToolResult(json.RawMessage(res)) |
| 50 | if err != nil { |
| 51 | t.Fatalf("parseToolResult: %v", err) |
| 52 | } |
| 53 | if len(images) != 1 || images[0] != "data:image/png;base64,"+payload { |
| 54 | t.Fatalf("images = %v, want whitespace stripped to %q", images, payload) |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | func TestParseToolResultImageInvalidBase64Omitted(t *testing.T) { |
| 59 | res := `{"content":[` + imageItem("image/png", "not-base64!!") + `]}` |
| 60 | text, images, err := parseToolResult(json.RawMessage(res)) |
| 61 | if err != nil { |
| 62 | t.Fatalf("parseToolResult: %v", err) |
| 63 | } |
| 64 | if len(images) != 0 { |
| 65 | t.Fatalf("images = %v, want none for invalid base64", images) |
| 66 | } |
| 67 | if !strings.Contains(text, "invalid base64") { |
| 68 | t.Fatalf("text = %q, want invalid-base64 placeholder", text) |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | func TestParseToolResultImageUnsupportedMimeOmitted(t *testing.T) { |
| 73 | payload := base64.StdEncoding.EncodeToString([]byte("bmp")) |
| 74 | res := `{"content":[` + imageItem("image/bmp", payload) + `]}` |
| 75 | text, images, err := parseToolResult(json.RawMessage(res)) |
| 76 | if err != nil { |
| 77 | t.Fatalf("parseToolResult: %v", err) |
| 78 | } |
| 79 | if len(images) != 0 { |
| 80 | t.Fatalf("images = %v, want none for unsupported mime", images) |
| 81 | } |
| 82 | if !strings.Contains(text, "unsupported type image/bmp") { |
| 83 | t.Fatalf("text = %q, want unsupported-type placeholder", text) |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | func TestParseToolResultImageOversizedOmitted(t *testing.T) { |
| 88 | // Valid base64 alphabet, over the byte budget. |
| 89 | big := strings.Repeat("QUFB", maxToolResultImageBytes/4+1) |
| 90 | res := `{"content":[` + imageItem("image/png", big) + `]}` |
| 91 | text, images, err := parseToolResult(json.RawMessage(res)) |
| 92 | if err != nil { |
| 93 | t.Fatalf("parseToolResult: %v", err) |
| 94 | } |
| 95 | if len(images) != 0 { |
| 96 | t.Fatalf("got %d images, want none for oversized payload", len(images)) |
| 97 | } |
| 98 | if !strings.Contains(text, "exceeds") { |
| 99 | t.Fatalf("text = %q, want oversize placeholder", text) |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | func TestParseToolResultImageCountCapped(t *testing.T) { |
| 104 | payload := base64.StdEncoding.EncodeToString([]byte("x")) |
| 105 | items := make([]string, 0, maxToolResultImages+1) |
| 106 | for i := 0; i < maxToolResultImages+1; i++ { |
| 107 | items = append(items, imageItem("image/png", payload)) |
| 108 | } |
| 109 | res := `{"content":[` + strings.Join(items, ",") + `]}` |
| 110 | text, images, err := parseToolResult(json.RawMessage(res)) |
| 111 | if err != nil { |
| 112 | t.Fatalf("parseToolResult: %v", err) |
| 113 | } |
| 114 | if len(images) != maxToolResultImages { |
| 115 | t.Fatalf("got %d images, want cap of %d", len(images), maxToolResultImages) |
| 116 | } |
| 117 | if !strings.Contains(text, "image limit reached") { |
| 118 | t.Fatalf("text = %q, want limit placeholder for the overflow item", text) |
| 119 | } |
| 120 | } |
| 121 | |
| 122 | func TestParseToolResultErrorStillReturnsImages(t *testing.T) { |
| 123 | payload := base64.StdEncoding.EncodeToString([]byte("x")) |
| 124 | res := `{"content":[{"type":"text","text":"boom "},` + imageItem("image/png", payload) + `],"isError":true}` |
| 125 | text, images, err := parseToolResult(json.RawMessage(res)) |
| 126 | if err == nil { |
| 127 | t.Fatal("want error for isError result") |
| 128 | } |
| 129 | if !strings.Contains(text, "boom") || !strings.Contains(text, "[image: image/png]") { |
| 130 | t.Fatalf("text = %q, want text and placeholder preserved", text) |
| 131 | } |
| 132 | if len(images) != 1 { |
| 133 | t.Fatalf("images = %v, want the image parsed even on error", images) |
| 134 | } |
| 135 | } |
| 136 |