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_node_modules/fast-check/lib/arbitrary/_internals/LimitedShrinkArbitrary.js

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+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.LimitedShrinkArbitrary = void 0;
+const Arbitrary_1 = require("../../check/arbitrary/definition/Arbitrary");
+const Value_1 = require("../../check/arbitrary/definition/Value");
+const Stream_1 = require("../../stream/Stream");
+const ZipIterableIterators_1 = require("./helpers/ZipIterableIterators");
+function* iotaFrom(startValue) {
+    let value = startValue;
+    while (true) {
+        yield value;
+        ++value;
+    }
+}
+class LimitedShrinkArbitrary extends Arbitrary_1.Arbitrary {
+    constructor(arb, maxShrinks) {
+        super();
+        this.arb = arb;
+        this.maxShrinks = maxShrinks;
+    }
+    generate(mrng, biasFactor) {
+        const value = this.arb.generate(mrng, biasFactor);
+        return this.valueMapper(value, 0);
+    }
+    canShrinkWithoutContext(value) {
+        return this.arb.canShrinkWithoutContext(value);
+    }
+    shrink(value, context) {
+        if (this.isSafeContext(context)) {
+            return this.safeShrink(value, context.originalContext, context.length);
+        }
+        return this.safeShrink(value, undefined, 0);
+    }
+    safeShrink(value, originalContext, currentLength) {
+        const remaining = this.maxShrinks - currentLength;
+        if (remaining <= 0) {
+            return Stream_1.Stream.nil();
+        }
+        return new Stream_1.Stream((0, ZipIterableIterators_1.zipIterableIterators)(this.arb.shrink(value, originalContext), iotaFrom(currentLength + 1)))
+            .take(remaining)
+            .map((valueAndLength) => this.valueMapper(valueAndLength[0], valueAndLength[1]));
+    }
+    valueMapper(v, newLength) {
+        const context = { originalContext: v.context, length: newLength };
+        return new Value_1.Value(v.value, context);
+    }
+    isSafeContext(context) {
+        return (context != null &&
+            typeof context === 'object' &&
+            'originalContext' in context &&
+            'length' in context);
+    }
+}
+exports.LimitedShrinkArbitrary = LimitedShrinkArbitrary;