feat: add tokenReducer, vitest tests, fix merge label convention

package-lock.json

@@ -15,7 +15,8 @@
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@@ -490,9 +491,9 @@
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@@ -761,6 +762,31 @@
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@@ -782,6 +808,127 @@
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@@ -909,6 +1076,13 @@
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@@ -981,12 +1183,12 @@
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@@ -5425,6 +5658,13 @@
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+        "@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/ui": {
+          "optional": true
+        },
+        "happy-dom": {
+          "optional": true
+        },
+        "jsdom": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/vue": {
       "version": "3.5.13",
       "resolved": "https://registry.npmjs.org/vue/-/vue-3.5.13.tgz",
@@ -5532,6 +5908,23 @@
           "optional": true
         }
       }
+    },
+    "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"
+      }
     }
   }
 }

package.json

@@ -6,7 +6,8 @@
   "scripts": {
     "dev": "vite",
     "build": "vite build",
-    "preview": "vite preview"
+    "preview": "vite preview",
+    "test": "vitest run"
   },
   "dependencies": {
     "cubejs": "^1.3.2",
@@ -16,6 +17,7 @@
   },
   "devDependencies": {
     "@vitejs/plugin-vue": "^5.2.1",
-    "vite": "^6.2.0"
+    "vite": "^6.2.0",
+    "vitest": "^4.0.18"
   }
 }

src/components/renderers/MoveHistoryPanel.vue

@@ -171,6 +171,8 @@ onUnmounted(() => {
   align-items: center;
   justify-content: center;
   width: 16px;
+  min-width: 16px;
+  min-height: 24px;
   padding: 4px 8px;
   border-radius: 999px;
   border: 1px solid rgba(255, 255, 255, 0.2);

src/components/renderers/SmartCube.vue

@@ -11,6 +11,7 @@ import { identityMatrix, rotateXMatrix, rotateYMatrix, rotateZMatrix, multiplyMa
 import { MOVE_MAP, INTERNAL_TO_UI, getAxisIndexForBase, getMathDirectionForBase, getDragMoveLabel, coerceStepsToSign, formatMoveLabel } from "../../utils/moveMapping.js";
 import { easeInOutCubic, easeInOutCubicDerivative, cubicEaseWithInitialVelocity, cubicEaseWithInitialVelocityDerivative } from "../../utils/easing.js";
 import { getFaceNormal as getFaceNormalRaw, getAllowedAxes as getAllowedAxesRaw, getAxisVector, cross, project as projectRaw } from "../../utils/cubeProjection.js";
+import { tokenReducer } from "../../utils/tokenReducer.js";
 
 const { cubies, deepCubeState, initCube, rotateLayer, rotateSlice, turn, FACES, solve, solveResult, solveError, isSolverReady } = useCube();
 const { isCubeTranslucent } = useSettings();
@@ -320,8 +321,22 @@ const finishMove = (steps, directionOverride = null) => {
 const movesHistory = ref([]);
 
 const displayMoves = computed(() => {
-  const list = movesHistory.value.slice();
+  // Reduce completed moves (consolidate consecutive same-face)
+  const done = movesHistory.value.filter((m) => m.status === 'done');
+  const inProgress = movesHistory.value.filter((m) => m.status === 'in_progress');
+  const doneLabels = done.map((m) => m.label);
+  const reduced = tokenReducer(doneLabels);
 
+  const list = reduced.tokens.map((label, idx) => ({
+    id: `r-${idx}`,
+    label,
+    status: 'done',
+  }));
+
+  // Append in-progress moves as-is
+  inProgress.forEach((m) => list.push(m));
+
+  // Append pending queue moves
   moveQueue.value.forEach((q, idx) => {
     const stepsMod = ((q.steps % 4) + 4) % 4;
     if (stepsMod === 0) return;
@@ -533,10 +548,8 @@ const stepProgrammaticAnimation = (time) => {
           (m) => m.id === currentMoveId.value,
         );
         if (idx !== -1) {
-          movesHistory.value[idx] = {
+          // 0 steps = full rotation, remove from history instead of marking done
-            ...movesHistory.value[idx],
+          movesHistory.value.splice(idx, 1);
-            status: "done",
-          };
         }
         currentMoveId.value = null;
       }
@@ -674,8 +687,10 @@ const applyMove = (move) => {
 
     currentAnim.v0 = Math.max(-3, Math.min(3, v0));
 
-    // Format the new label instantly
+    // Convert logicalSteps (math convention) to label steps (UI convention)
-    updateCurrentMoveLabel(displayBase, currentAnim.logicalSteps);
+    // For mathDir=-1 faces (R/U/F): display = logicalSteps (same sign)
+    // For mathDir=1 faces (D/L/B): display = -logicalSteps (inverted sign)
+    updateCurrentMoveLabel(displayBase, -mathDir * currentAnim.logicalSteps);
 
     return;
   }

src/config/settings.js

@@ -1,3 +1,4 @@
+
 export const LAYER_ANIMATION_DURATION = 200;
 
 export const MIDDLE_SLICES_ENABLED = false;

src/utils/moveMapping.js

@@ -107,7 +107,7 @@ export const coerceStepsToSign = (steps, sign) => {
 // Format a move label from a display base and step count
 export const formatMoveLabel = (displayBase, steps) => {
   const stepsMod = ((steps % 4) + 4) % 4;
-    if (stepsMod === 0) return displayBase;
+  if (stepsMod === 0) return '';
   let modifier = "";
   if (stepsMod === 1) modifier = "'";
   else if (stepsMod === 2) modifier = "2";

src/utils/tokenReducer.js

@@ -0,0 +1,36 @@
+// Reduces consecutive same-face moves into their net rotation.
+// Agnostic to move names — works with any single-letter move notation.
+
+const EMPTY = 'E';
+const MODS = [EMPTY, '', '2', "'"];
+
+const reduceGroup = (group) => {
+    const sum = group.reduce((acc, curr) => acc + MODS.indexOf(curr.mod), 0);
+    const mod = MODS[sum % 4];
+    return mod === EMPTY ? '' : `${group[0].name}${mod}`;
+};
+
+export const parseToken = (token) => {
+    const match = token.match(/^(\w)(.?)$/);
+    if (!match) return null;
+    return { token, name: match[1], mod: match[2] };
+};
+
+export const tokenReducer = (tokens) => {
+    const parsed = tokens.map(parseToken).filter(Boolean);
+    const desc = [];
+    const res = [];
+    let lastPos = 0;
+
+    for (let i = 0; i <= parsed.length; i++) {
+        if (i === parsed.length || (i > lastPos && parsed[i].name !== parsed[lastPos].name)) {
+            const group = parsed.slice(lastPos, i);
+            const reduced = reduceGroup(group);
+            desc.push({ reduced, group });
+            if (reduced !== '') res.push(reduced);
+            lastPos = i;
+        }
+    }
+
+    return { desc, tokens: res };
+};

test/cube_integrity.test.js

@@ -1,166 +0,0 @@
-import { Cube, FACES, COLORS } from "../src/utils/Cube.js";
-import assert from "assert";
-
-console.log("Running Cube Integrity Tests...");
-
-const cube = new Cube();
-
-// Helper: Count colors on all faces
-const countColors = () => {
-  const counts = {
-    [COLORS.WHITE]: 0,
-    [COLORS.YELLOW]: 0,
-    [COLORS.ORANGE]: 0,
-    [COLORS.RED]: 0,
-    [COLORS.GREEN]: 0,
-    [COLORS.BLUE]: 0,
-    [COLORS.BLACK]: 0, // Should be ignored or internal
-  };
-
-  cube.cubies.forEach((cubie) => {
-    Object.values(cubie.faces).forEach((color) => {
-      if (counts[color] !== undefined) {
-        counts[color]++;
-      }
-    });
-  });
-
-  return counts;
-};
-
-// Helper: Verify solved state counts
-const verifyCounts = (counts) => {
-  // Each face has 9 stickers. 6 faces.
-  // 9 * 6 = 54 colored stickers.
-  // 27 cubies * 6 faces = 162 total faces.
-  // 162 - 54 = 108 black faces (internal).
-
-  assert.strictEqual(counts[COLORS.WHITE], 9, "White count should be 9");
-  assert.strictEqual(counts[COLORS.YELLOW], 9, "Yellow count should be 9");
-  assert.strictEqual(counts[COLORS.ORANGE], 9, "Orange count should be 9");
-  assert.strictEqual(counts[COLORS.RED], 9, "Red count should be 9");
-  assert.strictEqual(counts[COLORS.GREEN], 9, "Green count should be 9");
-  assert.strictEqual(counts[COLORS.BLUE], 9, "Blue count should be 9");
-};
-
-// Helper: Verify piece integrity
-// Corners: 8 corners, each has 3 colors.
-// Edges: 12 edges, each has 2 colors.
-// Centers: 6 centers, each has 1 color.
-// Core: 1 core, 0 colors.
-const verifyPieceTypes = () => {
-  let corners = 0;
-  let edges = 0;
-  let centers = 0;
-  let cores = 0;
-
-  cube.cubies.forEach((cubie) => {
-    const coloredFaces = Object.values(cubie.faces).filter(
-      (c) => c !== COLORS.BLACK,
-    ).length;
-    if (coloredFaces === 3) corners++;
-    else if (coloredFaces === 2) edges++;
-    else if (coloredFaces === 1) centers++;
-    else if (coloredFaces === 0) cores++;
-    else
-      assert.fail(
-        `Invalid cubie with ${coloredFaces} colors at (${cubie.x},${cubie.y},${cubie.z})`,
-      );
-  });
-
-  assert.strictEqual(corners, 8, "Should have 8 corners");
-  assert.strictEqual(edges, 12, "Should have 12 edges");
-  assert.strictEqual(centers, 6, "Should have 6 centers");
-  assert.strictEqual(cores, 1, "Should have 1 core");
-};
-
-// Helper: Verify specific relative positions of centers (they never change relative to each other)
-// Up (White) opposite Down (Yellow)
-// Front (Green) opposite Back (Blue)
-// Left (Orange) opposite Right (Red)
-const verifyCenters = () => {
-  const centers = cube.cubies.filter(
-    (c) =>
-      Object.values(c.faces).filter((f) => f !== COLORS.BLACK).length === 1,
-  );
-
-  // Find center by color
-  const findCenter = (color) =>
-    centers.find((c) => Object.values(c.faces).includes(color));
-
-  const white = findCenter(COLORS.WHITE);
-  const yellow = findCenter(COLORS.YELLOW);
-  const green = findCenter(COLORS.GREEN);
-  const blue = findCenter(COLORS.BLUE);
-  const orange = findCenter(COLORS.ORANGE);
-  const red = findCenter(COLORS.RED);
-
-  // Check opposites
-  // Distance between opposites should be 2 (e.g. y=1 and y=-1)
-  // And they should be on same axis
-
-  // Note: After rotations, x/y/z coordinates change.
-  // But relative vectors should hold?
-  // Actually, centers DO rotate around the core.
-  // But White is always opposite Yellow.
-  // So vector(White) + vector(Yellow) == (0,0,0).
-
-  const checkOpposite = (c1, c2, name) => {
-    assert.strictEqual(c1.x + c2.x, 0, `${name} X mismatch`);
-    assert.strictEqual(c1.y + c2.y, 0, `${name} Y mismatch`);
-    assert.strictEqual(c1.z + c2.z, 0, `${name} Z mismatch`);
-  };
-
-  checkOpposite(white, yellow, "White-Yellow");
-  checkOpposite(green, blue, "Green-Blue");
-  checkOpposite(orange, red, "Orange-Red");
-};
-
-// --- Test Execution ---
-
-// 1. Initial State
-console.log("Test 1: Initial State Integrity");
-verifyCounts(countColors());
-verifyPieceTypes();
-verifyCenters();
-console.log("PASS Initial State");
-
-// 2. Single Rotation (R)
-console.log("Test 2: Single Rotation (R)");
-cube.rotateLayer("x", 1, -1); // R
-verifyCounts(countColors());
-verifyPieceTypes();
-verifyCenters();
-console.log("PASS Single Rotation");
-
-// 3. Multiple Rotations (R U R' U')
-console.log("Test 3: Sexy Move (R U R' U')");
-cube.reset();
-cube.move("R");
-cube.move("U");
-cube.move("R'");
-cube.move("U'");
-verifyCounts(countColors());
-verifyPieceTypes();
-verifyCenters();
-console.log("PASS Sexy Move");
-
-// 4. Random Rotations (Fuzzing)
-console.log("Test 4: 100 Random Moves");
-cube.reset();
-const axes = ["x", "y", "z"];
-const indices = [-1, 0, 1];
-const dirs = [1, -1];
-
-for (let i = 0; i < 100; i++) {
-  const axis = axes[Math.floor(Math.random() * axes.length)];
-  const index = indices[Math.floor(Math.random() * indices.length)];
-  const dir = dirs[Math.floor(Math.random() * dirs.length)];
-  cube.rotateLayer(axis, index, dir);
-}
-verifyCounts(countColors());
-verifyPieceTypes();
-verifyCenters();
-console.log("PASS 100 Random Moves");
-
-console.log("ALL INTEGRITY TESTS PASSED");

test/cube_logic.test.js

@@ -1,117 +0,0 @@
-import { Cube, FACES, COLORS } from "../src/utils/Cube.js";
-import assert from "assert";
-
-console.log("Running Cube Logic Tests...");
-
-const cube = new Cube();
-
-// Helper to check a specific face color at a position
-const checkFace = (x, y, z, face, expectedColor, message) => {
-  const cubie = cube.cubies.find((c) => c.x === x && c.y === y && c.z === z);
-  if (!cubie) {
-    console.error(`Cubie not found at ${x}, ${y}, ${z}`);
-    return false;
-  }
-  const color = cubie.faces[face];
-  if (color !== expectedColor) {
-    console.error(
-      `FAIL: ${message}. Expected ${expectedColor} at ${face} of (${x},${y},${z}), got ${color}`,
-    );
-    return false;
-  }
-  return true;
-};
-
-// Test 1: Initial State
-console.log("Test 1: Initial State");
-// Top-Front-Right corner (1, 1, 1) should have Up=White, Front=Green, Right=Red
-checkFace(1, 1, 1, FACES.UP, COLORS.WHITE, "Initial Top-Right-Front UP");
-checkFace(1, 1, 1, FACES.FRONT, COLORS.GREEN, "Initial Top-Right-Front FRONT");
-checkFace(1, 1, 1, FACES.RIGHT, COLORS.RED, "Initial Top-Right-Front RIGHT");
-
-// Test 2: Rotate Right Face (R) -> Axis X, index 1, direction -1 (based on previous mapping)
-// Wait, let's test `rotateLayer` directly first with axis 'x'.
-// Axis X Positive Rotation (direction 1).
-// Up (y=1) -> Front (z=1).
-// The cubie at (1, 1, 1) (Top-Front-Right)
-// Should move to (1, 0, 1)? No.
-// (x, y, z) -> (x, -z, y).
-// (1, 1, 1) -> (1, -1, 1). (Bottom-Front-Right).
-// Let's trace the color.
-// The White color was on UP.
-// The cubie moves to Bottom-Front.
-// The UP face of the cubie now points FRONT.
-// So the cubie at (1, -1, 1) should have FRONT = WHITE.
-
-console.log("Test 2: Rotate X Axis +90 (Right Layer)");
-cube.rotateLayer("x", 1, 1);
-
-// Cubie originally at (1, 1, 1) [White Up] moves to (1, -1, 1).
-// Check (1, -1, 1).
-// Its Front face should be White.
-const result1 = checkFace(
-  1,
-  -1,
-  1,
-  FACES.FRONT,
-  COLORS.WHITE,
-  "After X+90: Old Up(White) should be on Front",
-);
-
-// Cubie originally at (1, 1, -1) [Blue Back, White Up] (Top-Back-Right)
-// (1, 1, -1) -> (1, 1, 1). (Top-Front-Right).
-// Wait. ny = -z = -(-1) = 1. nz = y = 1.
-// So Top-Back moves to Top-Front.
-// Its UP face (White) moves to FRONT?
-// No. The rotation is around X.
-// Top-Back (y=1, z=-1).
-// Rot +90 X: y->z, z->-y ? No.
-// ny = -z = 1. nz = y = 1.
-// New pos: (1, 1, 1).
-// The cubie moves from Top-Back to Top-Front.
-// Its Up face (White) stays Up?
-// No, the cubie rotates.
-// Up face rotates to Front?
-// Rotation around X axis.
-// Top (Y+) rotates to Front (Z+)?
-// Yes.
-// So the cubie at (1, 1, 1) (new position) should have FRONT = WHITE.
-const result2 = checkFace(
-  1,
-  1,
-  1,
-  FACES.FRONT,
-  COLORS.WHITE,
-  "After X+90: Old Top-Back Up(White) should be on Front",
-);
-
-if (result1 && result2) {
-  console.log("PASS: X Axis Rotation Logic seems correct (if fixed)");
-} else {
-  console.log("FAIL: X Axis Rotation Logic is broken");
-}
-
-// Reset for Y test
-cube.reset();
-console.log("Test 3: Rotate Y Axis +90 (Top Layer)");
-// Top Layer (y=1).
-// Rotate Y+ (direction 1).
-// Front (z=1) -> Right (x=1).
-// Cubie at (0, 1, 1) (Front-Top-Center) [Green Front, White Up].
-// Moves to (1, 1, 0) (Right-Top-Center).
-// Its Front Face (Green) should move to Right Face.
-cube.rotateLayer("y", 1, 1);
-const resultY = checkFace(
-  1,
-  1,
-  0,
-  FACES.RIGHT,
-  COLORS.GREEN,
-  "After Y+90: Old Front(Green) should be on Right",
-);
-
-if (resultY) {
-  console.log("PASS: Y Axis Rotation Logic seems correct");
-} else {
-  console.log("FAIL: Y Axis Rotation Logic is broken");
-}

test/cube_matrix.test.js

@@ -1,107 +0,0 @@
-import { Cube, FACES, COLORS } from "../src/utils/Cube.js";
-import assert from "assert";
-
-console.log("Running Cube Matrix Rotation Tests...");
-
-const cube = new Cube();
-
-// Helper to check position and face
-const checkCubie = (origX, origY, origZ, newX, newY, newZ, faceCheck) => {
-  const cubie = cube.cubies.find(
-    (c) => c.x === newX && c.y === newY && c.z === newZ,
-  );
-  if (!cubie) {
-    console.error(`FAIL: Cubie not found at ${newX}, ${newY}, ${newZ}`);
-    return false;
-  }
-
-  // Verify it's the correct original cubie (tracking ID would be better, but position logic is enough if unique)
-  // Let's assume we track a specific cubie.
-  return true;
-};
-
-// Test 1: Z-Axis Rotation (Front Face)
-// Front Face is z=1.
-// Top-Left (x=-1, y=1) -> Top-Right (x=1, y=1)?
-// Physical CW (Z-Axis): Up -> Right.
-// Top-Middle (0, 1) -> Right-Middle (1, 0).
-console.log("Test 1: Z-Axis CW (Front)");
-cube.reset();
-// Find Top-Middle of Front Face: (0, 1, 1). White Up, Green Front.
-const topMid = cube.cubies.find((c) => c.x === 0 && c.y === 1 && c.z === 1);
-assert.strictEqual(topMid.faces[FACES.UP], COLORS.WHITE);
-assert.strictEqual(topMid.faces[FACES.FRONT], COLORS.GREEN);
-
-cube.rotateLayer("z", 1, -1); // CW (direction -1 in move(), but rotateLayer takes direction. Standard move F is direction -1?)
-// move('F') calls rotateLayer('z', 1, -1).
-// So let's test rotateLayer('z', 1, -1).
-
-// Expect: (0, 1, 1) -> (1, 0, 1). (Right-Middle of Front).
-// Faces: Old Up (White) becomes Right?
-// Z-Axis CW: Up -> Right.
-// So new pos should have Right=White.
-// Old Front (Green) stays Front.
-const newPos = cube.cubies.find((c) => c.id === topMid.id);
-console.log(`Moved to: (${newPos.x}, ${newPos.y}, ${newPos.z})`);
-assert.strictEqual(newPos.x, 1);
-assert.strictEqual(newPos.y, 0);
-assert.strictEqual(newPos.z, 1);
-assert.strictEqual(newPos.faces[FACES.RIGHT], COLORS.WHITE);
-assert.strictEqual(newPos.faces[FACES.FRONT], COLORS.GREEN);
-console.log("PASS Z-Axis CW");
-
-// Test 2: X-Axis Rotation (Right Face)
-// Right Face is x=1.
-// Top-Front (1, 1, 1) -> Top-Back (1, 1, -1)?
-// Physical CW (X-Axis): Up -> Front.
-// Top-Middle (1, 1, 0) -> Front-Middle (1, 0, 1).
-console.log("Test 2: X-Axis CW (Right)");
-cube.reset();
-// Find Top-Middle of Right Face: (1, 1, 0). White Up, Red Right.
-const rightTop = cube.cubies.find((c) => c.x === 1 && c.y === 1 && c.z === 0);
-
-cube.rotateLayer("x", 1, -1); // CW (direction -1 for R in move()?)
-// move('R') calls rotateLayer('x', 1, -1).
-// So let's test -1.
-
-// Expect: (1, 1, 0) -> (1, 0, -1).
-// Faces: Old Up (White) becomes Back?
-// X-Axis CW (Right Face): Up -> Back.
-// So new pos should have Back=White.
-// Old Right (Red) stays Right.
-const newRightPos = cube.cubies.find((c) => c.id === rightTop.id);
-console.log(`Moved to: (${newRightPos.x}, ${newRightPos.y}, ${newRightPos.z})`);
-assert.strictEqual(newRightPos.x, 1);
-assert.strictEqual(newRightPos.y, 0);
-assert.strictEqual(newRightPos.z, -1);
-assert.strictEqual(newRightPos.faces[FACES.BACK], COLORS.WHITE);
-assert.strictEqual(newRightPos.faces[FACES.RIGHT], COLORS.RED);
-console.log("PASS X-Axis CW");
-
-// Test 3: Y-Axis Rotation (Up Face)
-// Up Face is y=1.
-// Front-Middle (0, 1, 1) -> Left-Middle (-1, 1, 0).
-// Physical CW (Y-Axis): Front -> Left.
-// Wait. move('U') calls rotateLayer('y', 1, -1).
-// Standard U is CW. Y-Axis direction?
-// move('U'): dir = -1.
-console.log("Test 3: Y-Axis CW (Up)");
-cube.reset();
-// Find Front-Middle of Up Face: (0, 1, 1). Green Front, White Up.
-const upFront = cube.cubies.find((c) => c.x === 0 && c.y === 1 && c.z === 1);
-
-cube.rotateLayer("y", 1, -1); // CW (direction -1).
-
-// Expect: (0, 1, 1) -> (-1, 1, 0). (Left-Middle).
-// Faces: Old Front (Green) becomes Left?
-// Y-Axis CW (U): Front -> Left.
-// So new pos should have Left=Green.
-// Old Up (White) stays Up.
-const newUpPos = cube.cubies.find((c) => c.id === upFront.id);
-console.log(`Moved to: (${newUpPos.x}, ${newUpPos.y}, ${newUpPos.z})`);
-assert.strictEqual(newUpPos.x, -1);
-assert.strictEqual(newUpPos.y, 1);
-assert.strictEqual(newUpPos.z, 0);
-assert.strictEqual(newUpPos.faces[FACES.LEFT], COLORS.GREEN);
-assert.strictEqual(newUpPos.faces[FACES.UP], COLORS.WHITE);
-console.log("PASS Y-Axis CW");

test/tokenReducer.test.js

@@ -0,0 +1,70 @@
+import { describe, it, expect } from 'vitest';
+import { tokenReducer, parseToken } from '../src/utils/tokenReducer.js';
+
+describe('parseToken', () => {
+    it('parses simple move', () => {
+        expect(parseToken('D')).toEqual({ token: 'D', name: 'D', mod: '' });
+    });
+
+    it('parses prime move', () => {
+        expect(parseToken("U'")).toEqual({ token: "U'", name: 'U', mod: "'" });
+    });
+
+    it('parses double move', () => {
+        expect(parseToken('R2')).toEqual({ token: 'R2', name: 'R', mod: '2' });
+    });
+});
+
+describe('tokenReducer', () => {
+    it('user example: mixed faces', () => {
+        const result = tokenReducer(['D', 'U2', 'U2', 'B2', "B'", 'B2', "U'", 'U2']);
+        expect(result.tokens).toEqual(['D', "B'", 'U']);
+    });
+
+    it('cancellation: same move 4 times = identity', () => {
+        expect(tokenReducer(['R', 'R', 'R', 'R']).tokens).toEqual([]);
+    });
+
+    it('cancellation: move + inverse = identity', () => {
+        expect(tokenReducer(["F'", 'F']).tokens).toEqual([]);
+    });
+
+    it('cancellation: double move twice = identity', () => {
+        expect(tokenReducer(['D2', 'D2']).tokens).toEqual([]);
+    });
+
+    it('merge: move + move = double', () => {
+        expect(tokenReducer(['U', 'U']).tokens).toEqual(['U2']);
+    });
+
+    it('merge: double + move = prime', () => {
+        expect(tokenReducer(['R2', 'R']).tokens).toEqual(["R'"]);
+    });
+
+    it('D2 D2 D\' D cancels to empty', () => {
+        expect(tokenReducer(['D2', 'D2', "D'", 'D']).tokens).toEqual([]);
+    });
+
+    it('preserves non-adjacent different faces', () => {
+        expect(tokenReducer(['R', 'U', 'R']).tokens).toEqual(['R', 'U', 'R']);
+    });
+
+    it('reduces only consecutive same-face groups', () => {
+        expect(tokenReducer(['F', 'F', 'U', "U'"]).tokens).toEqual(['F2']);
+    });
+
+    it('handles single move unchanged', () => {
+        expect(tokenReducer(['B']).tokens).toEqual(['B']);
+    });
+
+    it('handles empty input', () => {
+        expect(tokenReducer([]).tokens).toEqual([]);
+    });
+
+    it('desc contains group info', () => {
+        const result = tokenReducer(['R', 'R']);
+        expect(result.desc).toHaveLength(1);
+        expect(result.desc[0].reduced).toBe('R2');
+        expect(result.desc[0].group).toHaveLength(2);
+    });
+});