Add multi-spec

Author: kawasima

lib/core/package-lock.json

@@ -12,7 +12,7 @@
     "@json-spec/testcheck": "^0.1.6"
   },
   "devDependencies": {
-    "jest": "^25.1.0"
+    "jest": "^26.6.3"
   },
   "gitHead": "3a6df1d730449208b7db3816fb1db26cd672228c"
 }

lib/core/package.json

@@ -185,6 +185,7 @@ describe('explains', () => {
       address: "Tokyo City",
       score: 10,
     })).toBe(true);
+
   })
 
   test('object anyOf', () => {
@@ -223,3 +224,28 @@ describe('explains', () => {
     })).toBe(true);
   })
 })
+
+describe('multiSpec', () => {
+  test('multiSpec', () => {
+    const spec = s.multi(o => o.nyuharai_kbn, {
+      1: s.object({
+        required: {
+          nyuharai_kbn: 1,
+          irainin_or_contract_no: s.spec(/\w+/)
+        }
+      }),
+      2: s.object({
+        required: {
+          nyuharai_kbn: 2,
+          irainin_or_contract_no: s.spec(/\d{20}[ ]{28}/)
+        }
+      })
+    });
+    const value = {
+      nyuharai_kbn: 2,
+      irainin_or_contract_no: '01'
+    };
+    console.log(gen.sample(s.gen(spec), 10));
+    expect(s.conform(spec, value)).toBe(s.INVALID);
+  })
+})

lib/core/src/__tests__/spec.test.js

@@ -1,4 +1,3 @@
-const assert = require('assert');
 const g = require('./gen');
 
 class Invalid {
@@ -38,9 +37,10 @@ class Spec {
   }
 
   /**
-   * @param {any} val
+   * @param {any}    val
+   * @param {Object} settings
    */
-  conform(val) {
+  conform(val, settings) {
     throw new Error('Not Implemented');
   }
 
@@ -480,6 +480,39 @@ class NullableSpec extends Spec {
   }
 }
 
+class MultiSpec extends Spec {
+  constructor(dispatchFn, forms, gfn) {
+    super(gfn);
+    this.dispatchFn = dispatchFn;
+    this.forms = forms;
+  }
+
+  conform(x) {
+    const v = this.dispatchFn(x);
+    const spec = this.forms[v];
+    if (spec == null) return null;
+    return spec.conform(x);
+  }
+
+  gen(overrides, path, rmap) {
+    if (this.gfn) {
+      return this.gfn();
+    } else {
+      return g.oneOf.apply(null, Object.values(this.forms).map(spec =>
+        gensub(spec, overrides, path, rmap, spec)));
+    }
+  }
+
+  explain(path, via, in_, x) {
+    if (this.conform(x) === INVALID) {
+      const v = this.dispatchFn(x);
+      return this.forms[v].explain(path, via, in_, x);
+    }
+    return null;
+  }
+
+}
+
 /**
  *
  */
@@ -518,7 +551,9 @@ function or(...preds) {
 }
 
 function array(pred, opts={}) {
-  assert.ok(pred != null);
+  if (pred == null) {
+    throw new Error('pred must not be null');
+  }
   return new ArraySpec(pred.toString(), pred, opts);
 }
 
@@ -541,13 +576,17 @@ function nullable(pred) {
   return new NullableSpec(pred, pred, null);
 }
 
-function conform(spec, x) {
-  return specize(spec).conform(x);
+function multi(dispatchFn, specMap) {
+  return new MultiSpec(dispatchFn, specMap);
+}
+
+function conform(spec, x, settings = {}) {
+  return specize(spec).conform(x, settings);
 }
 
-function isValid(spec, x) {
+function isValid(spec, x, settings = {}) {
   const specized = specize(spec);
-  return INVALID !== conform(specized, x);
+  return INVALID !== conform(specized, x, settings);
 }
 
 function gen(spec, overrides) {
@@ -572,6 +611,7 @@ module.exports = {
   object,
   tuple,
   nullable,
+  multi,
   isValid,
   isSpec,
   specize,