From e94c43ca6ef25088061d6bb55a06dfe8d62921b1 Mon Sep 17 00:00:00 2001
From: jzitnik-dev <email@jzitnik.dev>
Date: Thu, 4 Jun 2026 11:52:41 +0200
Subject: [PATCH] test: Added xlsx parsing tests

---
 package-lock.json                   | 1239 ++++++++++++++++++++++++++-
 package.json                        |    6 +-
 scrape/api/announcements.ts         |   14 +
 scrape/parse/v3.ts                  |    9 +-
 tests/content/1.xlsx                |  Bin 0 -> 9937 bytes
 tests/{ => content}/teachermap.json |    0
 tests/parseAbsence.test.ts          |  353 ++++++++
 tests/parseXlsx.test.ts             |  118 +++
 tests/test.ts                       |  352 --------
 9 files changed, 1724 insertions(+), 367 deletions(-)
 create mode 100644 tests/content/1.xlsx
 rename tests/{ => content}/teachermap.json (100%)
 create mode 100644 tests/parseAbsence.test.ts
 create mode 100644 tests/parseXlsx.test.ts
 delete mode 100644 tests/test.ts

diff --git a/package-lock.json b/package-lock.json
index 3450b65..613c697 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -38,7 +38,8 @@
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         "@types/xml2js": "^0.4.14",
         "tsx": "^4.21.0",
-        "typescript": "^5.9.3"
+        "typescript": "^5.9.3",
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@@ -64,10 +65,33 @@
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       }
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+      "license": "MIT",
+      "optional": true,
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+      "version": "1.10.0",
+      "resolved": "https://registry.npmjs.org/@emnapi/runtime/-/runtime-1.10.0.tgz",
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+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
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@@ -1446,6 +1470,32 @@
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+      "optional": true,
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+        "type": "github",
+        "url": "https://github.com/sponsors/Brooooooklyn"
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+        "@emnapi/runtime": "^1.7.1"
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       "resolved": "https://registry.npmjs.org/@next/env/-/env-16.1.6.tgz",
@@ -1580,6 +1630,16 @@
         "node": ">= 10"
       }
     },
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+      "resolved": "https://registry.npmjs.org/@oxc-project/types/-/types-0.133.0.tgz",
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+      "dev": true,
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@@ -1601,6 +1661,295 @@
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@@ -1627,6 +1987,17 @@
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+      "license": "MIT"
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@@ -1880,6 +2265,119 @@
         "@types/node": "*"
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+      "version": "3.3.12",
+      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.12.tgz",
+      "integrity": "sha512-ZB9RH/39qpq5Vu6Y+NmUaFhQR6pp+M2Xt76XBnEwDaGcVAqhlvxrl3B2bKS5D3NH3QR76v3aSrKaF/Kiy7lEtQ==",
       "funding": [
         {
           "type": "github",
@@ -4424,6 +5259,17 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/obug": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/obug/-/obug-2.1.1.tgz",
+      "integrity": "sha512-uTqF9MuPraAQ+IsnPf366RG4cP9RtUi7MLO1N3KEc+wb0a6yKpeL0lmk2IB1jY5KHPAlTc6T/JRdC/YqxHNwkQ==",
+      "dev": true,
+      "funding": [
+        "https://github.com/sponsors/sxzz",
+        "https://opencollective.com/debug"
+      ],
+      "license": "MIT"
+    },
     "node_modules/on-finished": {
       "version": "2.4.1",
       "resolved": "https://registry.npmjs.org/on-finished/-/on-finished-2.4.1.tgz",
@@ -4608,6 +5454,13 @@
         "node": ">=16"
       }
     },
+    "node_modules/pathe": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/pathe/-/pathe-2.0.3.tgz",
+      "integrity": "sha512-WUjGcAqP1gQacoQe+OBJsFA7Ld4DyXuUIjZ5cc75cLHvJ7dtNsTugphxIADwspS+AraAUePCKrSVtPLFj/F88w==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/pend": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/pend/-/pend-1.2.0.tgz",
@@ -4909,6 +5762,40 @@
         "rimraf": "bin.js"
       }
     },
+    "node_modules/rolldown": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/rolldown/-/rolldown-1.0.3.tgz",
+      "integrity": "sha512-i00lAJ2ks1BYr7rjNjKC7BcqAS7nVfiT3QX1SI5aY+AFHblCmaUf9OE9dbdzDvW6dJxbi2ZCZiy9v3CcwOiX3g==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@oxc-project/types": "=0.133.0",
+        "@rolldown/pluginutils": "^1.0.0"
+      },
+      "bin": {
+        "rolldown": "bin/cli.mjs"
+      },
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      },
+      "optionalDependencies": {
+        "@rolldown/binding-android-arm64": "1.0.3",
+        "@rolldown/binding-darwin-arm64": "1.0.3",
+        "@rolldown/binding-darwin-x64": "1.0.3",
+        "@rolldown/binding-freebsd-x64": "1.0.3",
+        "@rolldown/binding-linux-arm-gnueabihf": "1.0.3",
+        "@rolldown/binding-linux-arm64-gnu": "1.0.3",
+        "@rolldown/binding-linux-arm64-musl": "1.0.3",
+        "@rolldown/binding-linux-ppc64-gnu": "1.0.3",
+        "@rolldown/binding-linux-s390x-gnu": "1.0.3",
+        "@rolldown/binding-linux-x64-gnu": "1.0.3",
+        "@rolldown/binding-linux-x64-musl": "1.0.3",
+        "@rolldown/binding-openharmony-arm64": "1.0.3",
+        "@rolldown/binding-wasm32-wasi": "1.0.3",
+        "@rolldown/binding-win32-arm64-msvc": "1.0.3",
+        "@rolldown/binding-win32-x64-msvc": "1.0.3"
+      }
+    },
     "node_modules/router": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/router/-/router-2.2.0.tgz",
@@ -5229,6 +6116,13 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/siginfo": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/siginfo/-/siginfo-2.0.0.tgz",
+      "integrity": "sha512-ybx0WO1/8bSBLEWXZvEd7gMW3Sn3JFlW3TvX1nREbDLRNQNaeNN8WK0meBwPdAaOI7TtRRRJn/Es1zhrrCHu7g==",
+      "dev": true,
+      "license": "ISC"
+    },
     "node_modules/signal-exit": {
       "version": "4.1.0",
       "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-4.1.0.tgz",
@@ -5304,6 +6198,13 @@
       "integrity": "sha512-Oo+0REFV59/rz3gfJNKQiBlwfHaSESl1pcGyABQsnnIfWOFt6JNj5gCog2U6MLZ//IGYD+nA8nI+mTShREReaA==",
       "license": "BSD-3-Clause"
     },
+    "node_modules/stackback": {
+      "version": "0.0.2",
+      "resolved": "https://registry.npmjs.org/stackback/-/stackback-0.0.2.tgz",
+      "integrity": "sha512-1XMJE5fQo1jGH6Y/7ebnwPOBEkIEnT4QF32d5R1+VXdXveM0IBMJt8zfaxX1P3QhVwrYe+576+jkANtSS2mBbw==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/statuses": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/statuses/-/statuses-2.0.2.tgz",
@@ -5313,6 +6214,13 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/std-env": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/std-env/-/std-env-4.1.0.tgz",
+      "integrity": "sha512-Rq7ybcX2RuC55r9oaPVEW7/xu3tj8u4GeBYHBWCychFtzMIr86A7e3PPEBPT37sHStKX3+TiX/Fr/ACmJLVlLQ==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/streamx": {
       "version": "2.22.0",
       "resolved": "https://registry.npmjs.org/streamx/-/streamx-2.22.0.tgz",
@@ -5433,6 +6341,81 @@
         "b4a": "^1.6.4"
       }
     },
+    "node_modules/tinybench": {
+      "version": "2.9.0",
+      "resolved": "https://registry.npmjs.org/tinybench/-/tinybench-2.9.0.tgz",
+      "integrity": "sha512-0+DUvqWMValLmha6lr4kD8iAMK1HzV0/aKnCtWb9v9641TnP/MFb7Pc2bxoxQjTXAErryXVgUOfv2YqNllqGeg==",
+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/tinyexec": {
+      "version": "1.2.4",
+      "resolved": "https://registry.npmjs.org/tinyexec/-/tinyexec-1.2.4.tgz",
+      "integrity": "sha512-SHf/r48b7vOrjve9PxJo3MN5v5yuyjHvdUcrQffT3WXMUfnGmHDVbC4k3sHJaJTgZCwpUplIaAo5ANtMyp3YHg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/tinyglobby": {
+      "version": "0.2.17",
+      "resolved": "https://registry.npmjs.org/tinyglobby/-/tinyglobby-0.2.17.tgz",
+      "integrity": "sha512-wXR/dYpcqKmfWpEdZjiKJOwCNFndD0DMnrW/cYjVGttEkBfVgcLFHoNrlj47mjOVic9yyNu65alsgF4NQyTa2g==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "fdir": "^6.5.0",
+        "picomatch": "^4.0.4"
+      },
+      "engines": {
+        "node": ">=12.0.0"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/SuperchupuDev"
+      }
+    },
+    "node_modules/tinyglobby/node_modules/fdir": {
+      "version": "6.5.0",
+      "resolved": "https://registry.npmjs.org/fdir/-/fdir-6.5.0.tgz",
+      "integrity": "sha512-tIbYtZbucOs0BRGqPJkshJUYdL+SDH7dVM8gjy+ERp3WAUjLEFJE+02kanyHtwjWOnwrKYBiwAmM0p4kLJAnXg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=12.0.0"
+      },
+      "peerDependencies": {
+        "picomatch": "^3 || ^4"
+      },
+      "peerDependenciesMeta": {
+        "picomatch": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/tinyglobby/node_modules/picomatch": {
+      "version": "4.0.4",
+      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-4.0.4.tgz",
+      "integrity": "sha512-QP88BAKvMam/3NxH6vj2o21R6MjxZUAd6nlwAS/pnGvN9IVLocLHxGYIzFhg6fUQ+5th6P4dv4eW9jX3DSIj7A==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/jonschlinkert"
+      }
+    },
+    "node_modules/tinyrainbow": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/tinyrainbow/-/tinyrainbow-3.1.0.tgz",
+      "integrity": "sha512-Bf+ILmBgretUrdJxzXM0SgXLZ3XfiaUuOj/IKQHuTXip+05Xn+uyEYdVg0kYDipTBcLrCVyUzAPz7QmArb0mmw==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=14.0.0"
+      }
+    },
     "node_modules/tldts": {
       "version": "7.0.23",
       "resolved": "https://registry.npmjs.org/tldts/-/tldts-7.0.23.tgz",
@@ -5689,6 +6672,229 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/vite": {
+      "version": "8.0.16",
+      "resolved": "https://registry.npmjs.org/vite/-/vite-8.0.16.tgz",
+      "integrity": "sha512-h9bXPmJichP5fLmVQo3PyaGSDE2n3aPuomeAlVRm0JLmt4rY6zmPKd59HYI4LNW8oTK7tlTsuC7l/m7awx9Jcw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "lightningcss": "^1.32.0",
+        "picomatch": "^4.0.4",
+        "postcss": "^8.5.15",
+        "rolldown": "1.0.3",
+        "tinyglobby": "^0.2.17"
+      },
+      "bin": {
+        "vite": "bin/vite.js"
+      },
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      },
+      "funding": {
+        "url": "https://github.com/vitejs/vite?sponsor=1"
+      },
+      "optionalDependencies": {
+        "fsevents": "~2.3.3"
+      },
+      "peerDependencies": {
+        "@types/node": "^20.19.0 || >=22.12.0",
+        "@vitejs/devtools": "^0.1.18",
+        "esbuild": "^0.27.0 || ^0.28.0",
+        "jiti": ">=1.21.0",
+        "less": "^4.0.0",
+        "sass": "^1.70.0",
+        "sass-embedded": "^1.70.0",
+        "stylus": ">=0.54.8",
+        "sugarss": "^5.0.0",
+        "terser": "^5.16.0",
+        "tsx": "^4.8.1",
+        "yaml": "^2.4.2"
+      },
+      "peerDependenciesMeta": {
+        "@types/node": {
+          "optional": true
+        },
+        "@vitejs/devtools": {
+          "optional": true
+        },
+        "esbuild": {
+          "optional": true
+        },
+        "jiti": {
+          "optional": true
+        },
+        "less": {
+          "optional": true
+        },
+        "sass": {
+          "optional": true
+        },
+        "sass-embedded": {
+          "optional": true
+        },
+        "stylus": {
+          "optional": true
+        },
+        "sugarss": {
+          "optional": true
+        },
+        "terser": {
+          "optional": true
+        },
+        "tsx": {
+          "optional": true
+        },
+        "yaml": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/vite/node_modules/picomatch": {
+      "version": "4.0.4",
+      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-4.0.4.tgz",
+      "integrity": "sha512-QP88BAKvMam/3NxH6vj2o21R6MjxZUAd6nlwAS/pnGvN9IVLocLHxGYIzFhg6fUQ+5th6P4dv4eW9jX3DSIj7A==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/jonschlinkert"
+      }
+    },
+    "node_modules/vite/node_modules/postcss": {
+      "version": "8.5.15",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.15.tgz",
+      "integrity": "sha512-FfR8sjd4em2T6fb3I2MwAJU7HWVMr9zba+enmQeeWFfCbm+UOC/0X4DS8XtpUTMwWMGbjKYP7xjfNekzyGmB3A==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/postcss/"
+        },
+        {
+          "type": "tidelift",
+          "url": "https://tidelift.com/funding/github/npm/postcss"
+        },
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/ai"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "nanoid": "^3.3.12",
+        "picocolors": "^1.1.1",
+        "source-map-js": "^1.2.1"
+      },
+      "engines": {
+        "node": "^10 || ^12 || >=14"
+      }
+    },
+    "node_modules/vitest": {
+      "version": "4.1.8",
+      "resolved": "https://registry.npmjs.org/vitest/-/vitest-4.1.8.tgz",
+      "integrity": "sha512-flY6ScbCIt9HThs+C5HS7jvGOB560DJtk/Z15IQROTA6zEy49Nh8T/dofWTQL+n3vswqn87sbJNiuqw1SDp5Ig==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@vitest/expect": "4.1.8",
+        "@vitest/mocker": "4.1.8",
+        "@vitest/pretty-format": "4.1.8",
+        "@vitest/runner": "4.1.8",
+        "@vitest/snapshot": "4.1.8",
+        "@vitest/spy": "4.1.8",
+        "@vitest/utils": "4.1.8",
+        "es-module-lexer": "^2.0.0",
+        "expect-type": "^1.3.0",
+        "magic-string": "^0.30.21",
+        "obug": "^2.1.1",
+        "pathe": "^2.0.3",
+        "picomatch": "^4.0.3",
+        "std-env": "^4.0.0-rc.1",
+        "tinybench": "^2.9.0",
+        "tinyexec": "^1.0.2",
+        "tinyglobby": "^0.2.15",
+        "tinyrainbow": "^3.1.0",
+        "vite": "^6.0.0 || ^7.0.0 || ^8.0.0",
+        "why-is-node-running": "^2.3.0"
+      },
+      "bin": {
+        "vitest": "vitest.mjs"
+      },
+      "engines": {
+        "node": "^20.0.0 || ^22.0.0 || >=24.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      },
+      "peerDependencies": {
+        "@edge-runtime/vm": "*",
+        "@opentelemetry/api": "^1.9.0",
+        "@types/node": "^20.0.0 || ^22.0.0 || >=24.0.0",
+        "@vitest/browser-playwright": "4.1.8",
+        "@vitest/browser-preview": "4.1.8",
+        "@vitest/browser-webdriverio": "4.1.8",
+        "@vitest/coverage-istanbul": "4.1.8",
+        "@vitest/coverage-v8": "4.1.8",
+        "@vitest/ui": "4.1.8",
+        "happy-dom": "*",
+        "jsdom": "*",
+        "vite": "^6.0.0 || ^7.0.0 || ^8.0.0"
+      },
+      "peerDependenciesMeta": {
+        "@edge-runtime/vm": {
+          "optional": true
+        },
+        "@opentelemetry/api": {
+          "optional": true
+        },
+        "@types/node": {
+          "optional": true
+        },
+        "@vitest/browser-playwright": {
+          "optional": true
+        },
+        "@vitest/browser-preview": {
+          "optional": true
+        },
+        "@vitest/browser-webdriverio": {
+          "optional": true
+        },
+        "@vitest/coverage-istanbul": {
+          "optional": true
+        },
+        "@vitest/coverage-v8": {
+          "optional": true
+        },
+        "@vitest/ui": {
+          "optional": true
+        },
+        "happy-dom": {
+          "optional": true
+        },
+        "jsdom": {
+          "optional": true
+        },
+        "vite": {
+          "optional": false
+        }
+      }
+    },
+    "node_modules/vitest/node_modules/picomatch": {
+      "version": "4.0.4",
+      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-4.0.4.tgz",
+      "integrity": "sha512-QP88BAKvMam/3NxH6vj2o21R6MjxZUAd6nlwAS/pnGvN9IVLocLHxGYIzFhg6fUQ+5th6P4dv4eW9jX3DSIj7A==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/jonschlinkert"
+      }
+    },
     "node_modules/whatwg-encoding": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/whatwg-encoding/-/whatwg-encoding-3.1.1.tgz",
@@ -5725,6 +6931,23 @@
         "node": ">= 8"
       }
     },
+    "node_modules/why-is-node-running": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/why-is-node-running/-/why-is-node-running-2.3.0.tgz",
+      "integrity": "sha512-hUrmaWBdVDcxvYqnyh09zunKzROWjbZTiNy8dBEjkS7ehEDQibXJ7XvlmtbwuTclUiIyN+CyXQD4Vmko8fNm8w==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "siginfo": "^2.0.0",
+        "stackback": "0.0.2"
+      },
+      "bin": {
+        "why-is-node-running": "cli.js"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/wrap-ansi": {
       "version": "7.0.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-7.0.0.tgz",
diff --git a/package.json b/package.json
index d94d828..9ff646d 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,8 @@
   "type": "module",
   "main": "server.js",
   "scripts": {
-    "test": "tsx tests/test.ts",
+    "test": "vitest run",
+    "test:watch": "vitest",
     "start": "concurrently \"NODE_ENV=development tsx server.ts\" \"NODE_ENV=development tsx cron-runner.ts\"",
     "build": "tsc && cd web && hugo --gc --minify && cd ../viewer && npm run build",
     "build-noweb": "tsc",
@@ -46,6 +47,7 @@
     "@types/node-cron": "^3.0.11",
     "@types/xml2js": "^0.4.14",
     "tsx": "^4.21.0",
-    "typescript": "^5.9.3"
+    "typescript": "^5.9.3",
+    "vitest": "^4.1.8"
   }
 }
diff --git a/scrape/api/announcements.ts b/scrape/api/announcements.ts
index 9d35984..5e57001 100644
--- a/scrape/api/announcements.ts
+++ b/scrape/api/announcements.ts
@@ -1,3 +1,17 @@
+/*
+ * Copyright (C) 2026 Jakub Žitník
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
 const API_BASE_URL = process.env.ANNOUNCEMENT_API || "http://localhost:3000";
 
 export type Announcement = {
diff --git a/scrape/parse/v3.ts b/scrape/parse/v3.ts
index 23f7766..69d1ef3 100644
--- a/scrape/parse/v3.ts
+++ b/scrape/parse/v3.ts
@@ -39,7 +39,7 @@ interface ResolvedDay {
 /**
  * Read theme colors from the workbook
  */
-async function getThemeColors(filePath: string): Promise<ThemeColors | null> {
+export async function getThemeColors(filePath: string): Promise<ThemeColors | null> {
   const data = fs.readFileSync(filePath);
   const zip = await JSZip.loadAsync(data);
 
@@ -164,10 +164,9 @@ export default async function parseV3(workbook: Workbook, downloadedFilePath: st
 // ────────────────────────────────────────────────────────────
 //
 
-function getUpcomingSheets(workbook: ExcelJS.Workbook): ResolvedDay[] {
+export function getUpcomingSheets(workbook: ExcelJS.Workbook, today: Date = new Date()): ResolvedDay[] {
   const dateRegex = /^(pondělí|úterý|středa|čtvrtek|pátek|po|út|ut|st|čt|ct|pa|pá)\s+(\d{1,2})\.+\s*(\d{1,2})\.+\s*(\d{4}|\d{2})/i;
 
-  const today = new Date();
   const todayMidnight = new Date(today.getFullYear(), today.getMonth(), today.getDate());
 
   const result: ResolvedDay[] = [];
@@ -190,7 +189,7 @@ function getUpcomingSheets(workbook: ExcelJS.Workbook): ResolvedDay[] {
   return result;
 }
 
-function groupSheetsByDate(items: ResolvedDay[]) {
+export function groupSheetsByDate(items: ResolvedDay[]) {
   const map: Record<string, Worksheet[]> = {};
 
   for (const item of items) {
@@ -214,7 +213,7 @@ function groupSheetsByDate(items: ResolvedDay[]) {
 // ────────────────────────────────────────────────────────────
 //
 
-function extractDaySchedule(sheet: Worksheet, teacherMap: Record<string, string>, themeColors: ThemeColors | null, flags: Flag[]) {
+export function extractDaySchedule(sheet: Worksheet, teacherMap: Record<string, string>, themeColors: ThemeColors | null, flags: Flag[]) {
   return {
     changes: extractClassChanges(sheet, themeColors, flags),
     absence: extractAbsence(sheet, teacherMap),
diff --git a/tests/content/1.xlsx b/tests/content/1.xlsx
new file mode 100644
index 0000000000000000000000000000000000000000..3b0e755bee78146d87fa3dbb1534960b2ef8b127
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HcmV?d00001

diff --git a/tests/teachermap.json b/tests/content/teachermap.json
similarity index 100%
rename from tests/teachermap.json
rename to tests/content/teachermap.json
diff --git a/tests/parseAbsence.test.ts b/tests/parseAbsence.test.ts
new file mode 100644
index 0000000..894db17
--- /dev/null
+++ b/tests/parseAbsence.test.ts
@@ -0,0 +1,353 @@
+import { describe, it, expect } from "vitest";
+import fs from "fs";
+import parseAbsence from "../scrape/utils/parseAbsence.js";
+
+const teachermap: Record<string, string> = JSON.parse(
+  fs.readFileSync("./tests/content/teachermap.json", "utf8"),
+);
+
+const cases: [string, any[]][] = [
+  [
+    "Me",
+    [
+      {
+        teacher: "Michaela Meitnerová",
+        teacherCode: "me",
+        type: "wholeDay",
+        hours: null,
+      },
+    ],
+  ],
+  [
+    "ad",
+    [
+      {
+        teacher: "Bc. Daniel Adámek",
+        teacherCode: "ad",
+        type: "wholeDay",
+        hours: null,
+      },
+    ],
+  ],
+  [
+    "me ad",
+    [
+      {
+        teacher: "Michaela Meitnerová",
+        teacherCode: "me",
+        type: "wholeDay",
+        hours: null,
+      },
+      {
+        teacher: "Bc. Daniel Adámek",
+        teacherCode: "ad",
+        type: "wholeDay",
+        hours: null,
+      },
+    ],
+  ],
+  [
+    "me 3",
+    [
+      {
+        teacher: "Michaela Meitnerová",
+        teacherCode: "me",
+        type: "single",
+        hours: 3,
+      },
+    ],
+  ],
+  [
+    "ad 1",
+    [
+      {
+        teacher: "Bc. Daniel Adámek",
+        teacherCode: "ad",
+        type: "single",
+        hours: 1,
+      },
+    ],
+  ],
+  [
+    "me 2-4",
+    [
+      {
+        teacher: "Michaela Meitnerová",
+        teacherCode: "me",
+        type: "range",
+        hours: { from: 2, to: 4 },
+      },
+    ],
+  ],
+  [
+    "ad 5,6",
+    [
+      {
+        teacher: "Bc. Daniel Adámek",
+        teacherCode: "ad",
+        type: "range",
+        hours: { from: 5, to: 6 },
+      },
+    ],
+  ],
+  [
+    "me 7+",
+    [
+      {
+        teacher: "Michaela Meitnerová",
+        teacherCode: "me",
+        type: "range",
+        hours: { from: 7, to: 10 },
+      },
+    ],
+  ],
+  [
+    "me,ad 3-5",
+    [
+      {
+        teacher: "Michaela Meitnerová",
+        teacherCode: "me",
+        type: "range",
+        hours: { from: 3, to: 5 },
+      },
+      {
+        teacher: "Bc. Daniel Adámek",
+        teacherCode: "ad",
+        type: "range",
+        hours: { from: 3, to: 5 },
+      },
+    ],
+  ],
+  [
+    "me;ad 4",
+    [
+      {
+        teacher: "Michaela Meitnerová",
+        teacherCode: "me",
+        type: "wholeDay",
+        hours: null,
+      },
+      {
+        teacher: "Bc. Daniel Adámek",
+        teacherCode: "ad",
+        type: "single",
+        hours: 4,
+      },
+    ],
+  ],
+  [
+    "me;ad;bo 2-3",
+    [
+      {
+        teacher: "Michaela Meitnerová",
+        teacherCode: "me",
+        type: "wholeDay",
+        hours: null,
+      },
+      {
+        teacher: "Bc. Daniel Adámek",
+        teacherCode: "ad",
+        type: "wholeDay",
+        hours: null,
+      },
+      {
+        teacher: "Ing. Anna Bodnárová",
+        teacherCode: "bo",
+        type: "range",
+        hours: { from: 2, to: 3 },
+      },
+    ],
+  ],
+  [
+    "me 2 ad 4-5",
+    [
+      {
+        teacher: "Michaela Meitnerová",
+        teacherCode: "me",
+        type: "single",
+        hours: 2,
+      },
+      {
+        teacher: "Bc. Daniel Adámek",
+        teacherCode: "ad",
+        type: "range",
+        hours: { from: 4, to: 5 },
+      },
+    ],
+  ],
+  [
+    "3",
+    [
+      {
+        type: "invalid",
+        teacher: null,
+        teacherCode: null,
+        hours: null,
+        original: "3",
+      },
+    ],
+  ],
+  [
+    "2-4",
+    [
+      {
+        type: "invalid",
+        teacher: null,
+        teacherCode: null,
+        hours: null,
+        original: "2-4",
+      },
+    ],
+  ],
+  [
+    "me Xx 3",
+    [
+      {
+        teacher: "Michaela Meitnerová",
+        teacherCode: "me",
+        type: "wholeDay",
+        hours: null,
+      },
+      {
+        teacher: null,
+        teacherCode: "xx",
+        type: "single",
+        hours: 3,
+      },
+    ],
+  ],
+  [
+    "me,ad;bo 1-2 ad 5+",
+    [
+      {
+        teacher: "Michaela Meitnerová",
+        teacherCode: "me",
+        type: "wholeDay",
+        hours: null,
+      },
+      {
+        teacher: "Bc. Daniel Adámek",
+        teacherCode: "ad",
+        type: "wholeDay",
+        hours: null,
+      },
+      {
+        teacher: "Ing. Anna Bodnárová",
+        teacherCode: "bo",
+        type: "range",
+        hours: { from: 1, to: 2 },
+      },
+      {
+        teacher: "Bc. Daniel Adámek",
+        teacherCode: "ad",
+        type: "range",
+        hours: { from: 5, to: 10 },
+      },
+    ],
+  ],
+  [
+    "Me-exk",
+    [
+      {
+        teacher: "Michaela Meitnerová",
+        teacherCode: "me",
+        type: "exkurze",
+        hours: null,
+      },
+    ],
+  ],
+  [
+    "za Vn zastupuje Jk",
+    [
+      {
+        teacher: "Ing. Zdeněk Vondra",
+        teacherCode: "vn",
+        type: "zastoupen",
+        hours: null,
+        zastupuje: {
+          teacher: "David Janoušek",
+          teacherCode: "jk",
+        },
+      },
+    ],
+  ],
+  [
+    "Vc 1. h",
+    [
+      {
+        teacher: "Ing. Antonín Vobecký",
+        teacherCode: "vc",
+        type: "single",
+        hours: 1,
+      },
+    ],
+  ],
+  [
+    "Sv-5-exk",
+    [
+      {
+        teacher: "Ing. Jan Šváb",
+        teacherCode: "sv",
+        type: "exkurze",
+        hours: { from: 5, to: 10 },
+      },
+    ],
+  ],
+  [
+    "Ex-exk. 3+",
+    [
+      {
+        teacher: "Ing. Jana Exnerová",
+        teacherCode: "ex",
+        type: "exkurze",
+        hours: { from: 3, to: 10 },
+      },
+    ],
+  ],
+  [
+    "Ex-exk.3+",
+    [
+      {
+        teacher: "Ing. Jana Exnerová",
+        teacherCode: "ex",
+        type: "exkurze",
+        hours: { from: 3, to: 10 },
+      },
+    ],
+  ],
+  [
+    "Ex-exk. 3",
+    [
+      {
+        teacher: "Ing. Jana Exnerová",
+        teacherCode: "ex",
+        type: "exkurze",
+        hours: 3,
+      },
+    ],
+  ],
+  [
+    "Su 4 - 6",
+    [
+      {
+        teacher: "MUDr. Kristina Studénková",
+        teacherCode: "su",
+        type: "range",
+        hours: { from: 4, to: 6 },
+      },
+    ],
+  ],
+];
+
+function expectSameItems(actual: any[], expected: any[]) {
+  expect(actual).toHaveLength(expected.length);
+  for (const item of expected) {
+    expect(actual).toContainEqual(item);
+  }
+}
+
+describe("parseAbsence", () => {
+  it.each(cases)("parseAbsence(%s) → %j", (input, expected) => {
+    expectSameItems(parseAbsence(input, teachermap), expected);
+  });
+});
diff --git a/tests/parseXlsx.test.ts b/tests/parseXlsx.test.ts
new file mode 100644
index 0000000..e09720b
--- /dev/null
+++ b/tests/parseXlsx.test.ts
@@ -0,0 +1,118 @@
+import { describe, it, expect, beforeAll } from "vitest";
+import fs from "fs";
+import ExcelJS from "exceljs";
+import {
+  getThemeColors,
+  getUpcomingSheets,
+  groupSheetsByDate,
+  extractDaySchedule,
+} from "../scrape/parse/v3.js";
+
+const XLSX_PATH = "tests/content/1.xlsx";
+const TEACHERMAP_PATH = "tests/content/teachermap.json";
+
+let workbook: ExcelJS.Workbook;
+let teachermap: Record<string, string>;
+
+beforeAll(async () => {
+  workbook = new ExcelJS.Workbook();
+  await workbook.xlsx.readFile(XLSX_PATH);
+  teachermap = JSON.parse(fs.readFileSync(TEACHERMAP_PATH, "utf8"));
+});
+
+describe("sheet filtering", () => {
+  it("includes sheets on or after the injected date", () => {
+    const injected = new Date(2026, 5, 2); // June 2, 2026
+    const sheets = getUpcomingSheets(workbook, injected);
+
+    expect(sheets.length).toBeGreaterThanOrEqual(1);
+    expect(sheets.map((s) => s.dateKey)).toContain("2026-06-02");
+  });
+
+  it("excludes sheets before the injected date", () => {
+    const injected = new Date(2026, 5, 2);
+    const sheets = getUpcomingSheets(workbook, injected);
+
+    for (const s of sheets) {
+      const [y, m, d] = s.dateKey.split("-").map(Number);
+      expect(new Date(y, m - 1, d).getTime()).toBeGreaterThanOrEqual(
+        injected.getTime(),
+      );
+    }
+  });
+});
+
+describe("full day parsing", () => {
+  let result: ReturnType<typeof extractDaySchedule>;
+  let sheet: ExcelJS.Worksheet;
+  let themeColors: Awaited<ReturnType<typeof getThemeColors>>;
+
+  beforeAll(async () => {
+    const injected = new Date(2026, 5, 2);
+    const upcoming = getUpcomingSheets(workbook, injected);
+    const resolved = groupSheetsByDate(upcoming);
+    const day = resolved.find((d) => d.dateKey === "2026-06-02")!;
+    sheet = day.sheet;
+    themeColors = await getThemeColors(XLSX_PATH);
+    result = extractDaySchedule(sheet, teachermap, themeColors, []);
+  });
+
+  describe("changes", () => {
+    it("is a non-empty record of class → lessons", () => {
+      const keys = Object.keys(result.changes);
+      expect(keys.length).toBeGreaterThan(0);
+
+      for (const [cls, lessons] of Object.entries(result.changes)) {
+        expect(cls).toMatch(/^[AEC][0-4][a-c]?$/);
+        expect(lessons).toHaveLength(10);
+        for (const lesson of lessons) {
+          if (lesson === null) continue;
+          expect(lesson).toHaveProperty("text");
+          expect(typeof lesson.text).toBe("string");
+          expect(lesson).toHaveProperty("backgroundColor");
+        }
+      }
+    });
+
+    it("includes A1a with known lesson at hour 5", () => {
+      const a1a = result.changes["A1a"];
+      expect(a1a).toBeDefined();
+      const hour5 = a1a[4];
+      expect(hour5).not.toBeNull();
+      expect(hour5!.text).toContain("ZE");
+    });
+  });
+
+  describe("absence", () => {
+    it("is an array of parsed absence entries", () => {
+      expect(Array.isArray(result.absence)).toBe(true);
+      expect(result.absence.length).toBeGreaterThan(0);
+
+      for (const entry of result.absence) {
+        expect(entry).toHaveProperty("teacher");
+        expect(entry).toHaveProperty("teacherCode");
+        expect(entry).toHaveProperty("type");
+        expect(entry).toHaveProperty("hours");
+      }
+    });
+
+    it("contains a known absence entry", () => {
+      const su = result.absence.find((a: any) => a.teacherCode === "su");
+      expect(su).toBeDefined();
+      expect(su!.teacher).toContain("Studénková");
+    });
+  });
+
+  describe("takesPlace", () => {
+    it("is a non-empty string", () => {
+      expect(typeof result.takesPlace).toBe("string");
+      expect(result.takesPlace.length).toBeGreaterThan(0);
+    });
+  });
+
+  describe("reservedRooms", () => {
+    it("is an array of 10 entries", () => {
+      expect(result.reservedRooms).toHaveLength(10);
+    });
+  });
+});
diff --git a/tests/test.ts b/tests/test.ts
deleted file mode 100644
index 2f223c4..0000000
--- a/tests/test.ts
+++ /dev/null
@@ -1,352 +0,0 @@
-/*
- * Copyright (C) 2025 Jakub Žitník
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-import fs from "fs";
-import parseAbsence from "../scrape/utils/parseAbsence.js";
-
-const teachermap: Record<string, string> = JSON.parse(fs.readFileSync("./tests/teachermap.json", "utf8"));
-let passedAll = true;
-
-test("Me", [
-  {
-    teacher: "Michaela Meitnerová",
-    teacherCode: "me",
-    type: "wholeDay",
-    hours: null,
-  },
-]);
-
-test("ad", [
-  {
-    teacher: "Bc. Daniel Adámek",
-    teacherCode: "ad",
-    type: "wholeDay",
-    hours: null,
-  },
-]);
-
-test("me ad", [
-  {
-    teacher: "Michaela Meitnerová",
-    teacherCode: "me",
-    type: "wholeDay",
-    hours: null,
-  },
-  {
-    teacher: "Bc. Daniel Adámek",
-    teacherCode: "ad",
-    type: "wholeDay",
-    hours: null,
-  },
-]);
-
-test("me 3", [
-  {
-    teacher: "Michaela Meitnerová",
-    teacherCode: "me",
-    type: "single",
-    hours: 3,
-  },
-]);
-
-test("ad 1", [
-  {
-    teacher: "Bc. Daniel Adámek",
-    teacherCode: "ad",
-    type: "single",
-    hours: 1,
-  },
-]);
-
-test("me 2-4", [
-  {
-    teacher: "Michaela Meitnerová",
-    teacherCode: "me",
-    type: "range",
-    hours: { from: 2, to: 4 },
-  },
-]);
-
-test("ad 5,6", [
-  {
-    teacher: "Bc. Daniel Adámek",
-    teacherCode: "ad",
-    type: "range",
-    hours: { from: 5, to: 6 },
-  },
-]);
-
-test("me 7+", [
-  {
-    teacher: "Michaela Meitnerová",
-    teacherCode: "me",
-    type: "range",
-    hours: { from: 7, to: 10 },
-  },
-]);
-
-test("me,ad 3-5", [
-  {
-    teacher: "Michaela Meitnerová",
-    teacherCode: "me",
-    type: "range",
-    hours: { from: 3, to: 5 },
-  },
-  {
-    teacher: "Bc. Daniel Adámek",
-    teacherCode: "ad",
-    type: "range",
-    hours: { from: 3, to: 5 },
-  },
-]);
-
-test("me;ad 4", [
-  {
-    teacher: "Michaela Meitnerová",
-    teacherCode: "me",
-    type: "wholeDay",
-    hours: null,
-  },
-  {
-    teacher: "Bc. Daniel Adámek",
-    teacherCode: "ad",
-    type: "single",
-    hours: 4,
-  },
-]);
-
-test("me;ad;bo 2-3", [
-  {
-    teacher: "Michaela Meitnerová",
-    teacherCode: "me",
-    type: "wholeDay",
-    hours: null,
-  },
-  {
-    teacher: "Bc. Daniel Adámek",
-    teacherCode: "ad",
-    type: "wholeDay",
-    hours: null,
-  },
-  {
-    teacher: "Ing. Anna Bodnárová",
-    teacherCode: "bo",
-    type: "range",
-    hours: { from: 2, to: 3 },
-  },
-]);
-
-test("me 2 ad 4-5", [
-  {
-    teacher: "Michaela Meitnerová",
-    teacherCode: "me",
-    type: "single",
-    hours: 2,
-  },
-  {
-    teacher: "Bc. Daniel Adámek",
-    teacherCode: "ad",
-    type: "range",
-    hours: { from: 4, to: 5 },
-  },
-]);
-
-test("3", [
-  {
-    type: "invalid",
-    teacher: null,
-    teacherCode: null,
-    hours: null,
-    original: "3",
-  },
-]);
-
-test("2-4", [
-  {
-    type: "invalid",
-    teacher: null,
-    teacherCode: null,
-    hours: null,
-    original: "2-4",
-  },
-]);
-
-test("me Xx 3", [
-  {
-    teacher: "Michaela Meitnerová",
-    teacherCode: "me",
-    type: "wholeDay",
-    hours: null,
-  },
-  { teacher: null, teacherCode: "xx", type: "single", hours: 3 },
-]);
-
-test("me,ad;bo 1-2 ad 5+", [
-  {
-    teacher: "Michaela Meitnerová",
-    teacherCode: "me",
-    type: "wholeDay",
-    hours: null,
-  },
-  {
-    teacher: "Bc. Daniel Adámek",
-    teacherCode: "ad",
-    type: "wholeDay",
-    hours: null,
-  },
-  {
-    teacher: "Ing. Anna Bodnárová",
-    teacherCode: "bo",
-    type: "range",
-    hours: { from: 1, to: 2 },
-  },
-  {
-    teacher: "Bc. Daniel Adámek",
-    teacherCode: "ad",
-    type: "range",
-    hours: { from: 5, to: 10 },
-  },
-]);
-
-test("Me-exk", [
-  {
-    teacher: "Michaela Meitnerová",
-    teacherCode: "me",
-    type: "exkurze",
-    hours: null,
-  },
-]);
-
-test("za Vn zastupuje Jk", [
-  {
-    teacher: "Ing. Zdeněk Vondra",
-    teacherCode: "vn",
-    type: "zastoupen",
-    hours: null,
-    zastupuje: {
-      teacher: "David Janoušek",
-      teacherCode: "jk",
-    },
-  },
-]);
-
-test("Vc 1. h", [
-  {
-    teacher: "Ing. Antonín Vobecký",
-    teacherCode: "vc",
-    type: "single",
-    hours: 1,
-  },
-]);
-
-test("Sv-5-exk", [
-  {
-    teacher: "Ing. Jan Šváb",
-    teacherCode: "sv",
-    type: "exkurze",
-    hours: { from: 5, to: 10 },
-  },
-]);
-
-test("Ex-exk. 3+", [
-  {
-    teacher: "Ing. Jana Exnerová",
-    teacherCode: "ex",
-    type: "exkurze",
-    hours: { from: 3, to: 10 },
-  },
-]);
-
-test("Ex-exk.3+", [
-  {
-    teacher: "Ing. Jana Exnerová",
-    teacherCode: "ex",
-    type: "exkurze",
-    hours: { from: 3, to: 10 },
-  },
-]);
-
-test("Ex-exk. 3", [
-  {
-    teacher: "Ing. Jana Exnerová",
-    teacherCode: "ex",
-    type: "exkurze",
-    hours: 3,
-  },
-]);
-
-test("Su 4 - 6", [
-  {
-    teacher: "MUDr. Kristina Studénková",
-    teacherCode: "su",
-    type: "range",
-    hours: {from: 4, to: 6},
-  }
-]);
-
-function test(input: string, expectedOutput: any[]) {
-  const res = parseAbsence(input, teachermap);
-
-  if (!deepEqual(res, expectedOutput)) {
-    passedAll = false;
-    console.error("ERROR for input: " + input);
-    console.log(JSON.stringify(res, null, 2));
-    console.log(JSON.stringify(expectedOutput, null, 2));
-    console.log();
-  }
-}
-
-function deepEqual(a: any, b: any): boolean {
-  if (a === b) return true;
-
-  if (
-    typeof a !== "object" ||
-    a === null ||
-    typeof b !== "object" ||
-    b === null
-  ) {
-    return false;
-  }
-
-  // Handle arrays (ignore order)
-  if (Array.isArray(a) && Array.isArray(b)) {
-    if (a.length !== b.length) return false;
-
-    const used = new Array(b.length).fill(false);
-
-    return a.every((itemA) =>
-      b.some((itemB, i) => {
-        if (used[i]) return false; // don't reuse elements
-        if (deepEqual(itemA, itemB)) {
-          used[i] = true; // mark element as used
-          return true;
-        }
-        return false;
-      }),
-    );
-  }
-
-  if (Array.isArray(a) !== Array.isArray(b)) return false;
-
-  const keysA = Object.keys(a);
-  const keysB = Object.keys(b);
-
-  if (keysA.length !== keysB.length) return false;
-
-  return keysA.every((key) => keysB.includes(key) && deepEqual(a[key], b[key]));
-}
-
-if (passedAll) {
-  console.log("All tests passed");
-}