Kernel rig: bend table cases, JSON and CSV rows with angles, radii and K-factor allowances, and an unknown format refused

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/kernel-cases/sheet-metal/cov-export-bend-table-csv-flange-and-hem/expected.json

@@ -0,0 +1,40 @@
+{
+ "sources": [],
+ "what": "sheet.export_bend_table as CSV of an 80 x 40 x 2 base with a 60 degree flange on one long edge and a hem on the other",
+ "source": "analytic",
+ "method": "T = 2, K = 0.5. Bend 1, the flange: 60 degrees up (included 120), R 2, BA = (pi/3)(2 + 1) = 3.141592654, 80 long. Bend 2, the hem on the top edge: 180 degrees down (included 0), its radius the rule's hem gap 0.01, BA = pi(0.01 + 1) = 3.173008580, 80 long",
+ "body_count": 1,
+ "files": [
+  {
+   "path": "bends.csv",
+   "csv": [
+    {
+     "body": "Body1",
+     "rule": "Steel 2",
+     "thickness_mm": 2.0,
+     "k_factor": 0.5,
+     "bend": 1,
+     "angle_deg": 60.0,
+     "direction": "up",
+     "radius_mm": 2.0,
+     "allowance_mm": 3.141592653589793,
+     "length_mm": 80.0,
+     "included_angle_deg": 120.0
+    },
+    {
+     "body": "Body1",
+     "rule": "Steel 2",
+     "thickness_mm": 2.0,
+     "k_factor": 0.5,
+     "bend": 2,
+     "angle_deg": 180.0,
+     "direction": "down",
+     "radius_mm": 0.01,
+     "allowance_mm": 3.173008580125691,
+     "length_mm": 80.0,
+     "included_angle_deg": 0.0
+    }
+   ]
+  }
+ ]
+}

tests/kernel-cases/sheet-metal/cov-export-bend-table-csv-flange-and-hem/recipe.json

@@ -0,0 +1,79 @@
+{
+ "commands": [
+  {
+   "command": "sheet.manage_rules",
+   "params": {
+    "name": "Steel 2",
+    "thickness": "2 mm",
+    "active": true,
+    "bend_radius": "2 mm",
+    "k_factor": 0.5
+   }
+  },
+  {
+   "command": "sketch.create",
+   "params": {
+    "plane": "XY",
+    "name": "Base"
+   }
+  },
+  {
+   "command": "sketch.rectangle.two_point",
+   "params": {
+    "p0": [
+     0,
+     0
+    ],
+    "p1": [
+     80,
+     40
+    ]
+   }
+  },
+  {
+   "command": "sketch.finish",
+   "params": {}
+  },
+  {
+   "command": "sheet.flange",
+   "params": {
+    "type": "base",
+    "sketch": "Base"
+   }
+  },
+  {
+   "command": "sheet.flange",
+   "params": {
+    "type": "edge",
+    "edges": [
+     [
+      40,
+      0,
+      2
+     ]
+    ],
+    "height": 20,
+    "angle": "60 deg"
+   }
+  },
+  {
+   "command": "sheet.hem",
+   "params": {
+    "edges": [
+     [
+      40,
+      40,
+      2
+     ]
+    ],
+    "length": 8
+   }
+  },
+  {
+   "command": "sheet.export_bend_table",
+   "params": {
+    "path": "$OUT/bends.csv"
+   }
+  }
+ ]
+}

tests/kernel-cases/sheet-metal/cov-export-bend-table-json-one-flange/expected.json

@@ -0,0 +1,33 @@
+{
+ "sources": [],
+ "what": "sheet.export_bend_table as JSON of an 80 x 40 x 2 base with one 90 degree flange 20 high",
+ "source": "analytic",
+ "method": "the rule: T = 2, K = 0.5, R = 2. One bend: 90 degrees (included 180 - 90 = 90), up, radius 2, allowance BA = theta(R + K*T) = (pi/2)(2 + 1) = 4.712388980, as long as the edge, 80; flat 80 x 56.712389 x 2",
+ "body_count": 1,
+ "files": [
+  {
+   "path": "bends.json",
+   "json": {
+    "rule": "Steel 2",
+    "thickness": 2.0,
+    "k_factor": 0.5,
+    "flat_size_mm": [
+     80.0,
+     56.71238898038469,
+     2.0
+    ],
+    "bends": [
+     {
+      "bend": 1,
+      "angle_deg": 90.0,
+      "included_angle_deg": 90.0,
+      "radius": 2.0,
+      "direction": "up",
+      "allowance": 4.71238898038469,
+      "length": 80.0
+     }
+    ]
+   }
+  }
+ ]
+}

tests/kernel-cases/sheet-metal/cov-export-bend-table-json-one-flange/recipe.json

@@ -0,0 +1,66 @@
+{
+ "commands": [
+  {
+   "command": "sheet.manage_rules",
+   "params": {
+    "name": "Steel 2",
+    "thickness": "2 mm",
+    "active": true,
+    "bend_radius": "2 mm",
+    "k_factor": 0.5
+   }
+  },
+  {
+   "command": "sketch.create",
+   "params": {
+    "plane": "XY",
+    "name": "Base"
+   }
+  },
+  {
+   "command": "sketch.rectangle.two_point",
+   "params": {
+    "p0": [
+     0,
+     0
+    ],
+    "p1": [
+     80,
+     40
+    ]
+   }
+  },
+  {
+   "command": "sketch.finish",
+   "params": {}
+  },
+  {
+   "command": "sheet.flange",
+   "params": {
+    "type": "base",
+    "sketch": "Base"
+   }
+  },
+  {
+   "command": "sheet.flange",
+   "params": {
+    "type": "edge",
+    "edges": [
+     [
+      40,
+      0,
+      2
+     ]
+    ],
+    "height": 20
+   }
+  },
+  {
+   "command": "sheet.export_bend_table",
+   "params": {
+    "format": "json",
+    "path": "$OUT/bends.json"
+   }
+  }
+ ]
+}

tests/kernel-cases/sheet-metal/cov-export-bend-table-unknown-format-refused/expected.json

@@ -0,0 +1,8 @@
+{
+ "sources": [],
+ "what": "sheet.export_bend_table asked for a format it does not write (xlsx)",
+ "source": "invariants",
+ "method": "the table is written as csv or json only: any other format is refused, naming the two",
+ "outcome": "refused",
+ "refusal": "`format` must be csv or json"
+}

tests/kernel-cases/sheet-metal/cov-export-bend-table-unknown-format-refused/recipe.json

@@ -0,0 +1,66 @@
+{
+ "commands": [
+  {
+   "command": "sheet.manage_rules",
+   "params": {
+    "name": "Steel 2",
+    "thickness": "2 mm",
+    "active": true,
+    "bend_radius": "2 mm",
+    "k_factor": 0.5
+   }
+  },
+  {
+   "command": "sketch.create",
+   "params": {
+    "plane": "XY",
+    "name": "Base"
+   }
+  },
+  {
+   "command": "sketch.rectangle.two_point",
+   "params": {
+    "p0": [
+     0,
+     0
+    ],
+    "p1": [
+     80,
+     40
+    ]
+   }
+  },
+  {
+   "command": "sketch.finish",
+   "params": {}
+  },
+  {
+   "command": "sheet.flange",
+   "params": {
+    "type": "base",
+    "sketch": "Base"
+   }
+  },
+  {
+   "command": "sheet.flange",
+   "params": {
+    "type": "edge",
+    "edges": [
+     [
+      40,
+      0,
+      2
+     ]
+    ],
+    "height": 20
+   }
+  },
+  {
+   "command": "sheet.export_bend_table",
+   "params": {
+    "format": "xlsx",
+    "path": "$OUT/bends.xlsx"
+   }
+  }
+ ]
+}