jest-react/cjs/jest-react.development.js

/** @license React v0.8.1
 * jest-react.development.js
 *
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

'use strict';



if (process.env.NODE_ENV !== "production") {
  (function() {
'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

/*
object-assign
(c) Sindre Sorhus
@license MIT
*/


/* eslint-disable no-unused-vars */
var getOwnPropertySymbols = Object.getOwnPropertySymbols;
var hasOwnProperty = Object.prototype.hasOwnProperty;
var propIsEnumerable = Object.prototype.propertyIsEnumerable;

function toObject(val) {
	if (val === null || val === undefined) {
		throw new TypeError('Object.assign cannot be called with null or undefined');
	}

	return Object(val);
}

function shouldUseNative() {
	try {
		if (!Object.assign) {
			return false;
		}

		// Detect buggy property enumeration order in older V8 versions.

		// https://bugs.chromium.org/p/v8/issues/detail?id=4118
		var test1 = new String('abc');  // eslint-disable-line no-new-wrappers
		test1[5] = 'de';
		if (Object.getOwnPropertyNames(test1)[0] === '5') {
			return false;
		}

		// https://bugs.chromium.org/p/v8/issues/detail?id=3056
		var test2 = {};
		for (var i = 0; i < 10; i++) {
			test2['_' + String.fromCharCode(i)] = i;
		}
		var order2 = Object.getOwnPropertyNames(test2).map(function (n) {
			return test2[n];
		});
		if (order2.join('') !== '0123456789') {
			return false;
		}

		// https://bugs.chromium.org/p/v8/issues/detail?id=3056
		var test3 = {};
		'abcdefghijklmnopqrst'.split('').forEach(function (letter) {
			test3[letter] = letter;
		});
		if (Object.keys(Object.assign({}, test3)).join('') !==
				'abcdefghijklmnopqrst') {
			return false;
		}

		return true;
	} catch (err) {
		// We don't expect any of the above to throw, but better to be safe.
		return false;
	}
}

var objectAssign = shouldUseNative() ? Object.assign : function (target, source) {
	var from;
	var to = toObject(target);
	var symbols;

	for (var s = 1; s < arguments.length; s++) {
		from = Object(arguments[s]);

		for (var key in from) {
			if (hasOwnProperty.call(from, key)) {
				to[key] = from[key];
			}
		}

		if (getOwnPropertySymbols) {
			symbols = getOwnPropertySymbols(from);
			for (var i = 0; i < symbols.length; i++) {
				if (propIsEnumerable.call(from, symbols[i])) {
					to[symbols[i]] = from[symbols[i]];
				}
			}
		}
	}

	return to;
};

// Do not require this module directly! Use normal `invariant` calls with
// template literal strings. The messages will be converted to ReactError during
// build, and in production they will be minified.

// Do not require this module directly! Use normal `invariant` calls with
// template literal strings. The messages will be converted to ReactError during
// build, and in production they will be minified.
function ReactError(error) {
  error.name = 'Invariant Violation';
  return error;
}

// The Symbol used to tag the ReactElement-like types. If there is no native Symbol
// nor polyfill, then a plain number is used for performance.
var hasSymbol = typeof Symbol === 'function' && Symbol.for;
var REACT_ELEMENT_TYPE = hasSymbol ? Symbol.for('react.element') : 0xeac7;

var REACT_FRAGMENT_TYPE = hasSymbol ? Symbol.for('react.fragment') : 0xeacb;



 // TODO: We don't use AsyncMode or ConcurrentMode anymore. They were temporary
// (unstable) APIs that have been removed. Can we remove the symbols?

/**
 * Use invariant() to assert state which your program assumes to be true.
 *
 * Provide sprintf-style format (only %s is supported) and arguments
 * to provide information about what broke and what you were
 * expecting.
 *
 * The invariant message will be stripped in production, but the invariant
 * will remain to ensure logic does not differ in production.
 */

function captureAssertion(fn) {
  // Trick to use a Jest matcher inside another Jest matcher. `fn` contains an
  // assertion; if it throws, we capture the error and return it, so the stack
  // trace presented to the user points to the original assertion in the
  // test file.
  try {
    fn();
  } catch (error) {
    return {
      pass: false,
      message: function () {
        return error.message;
      }
    };
  }

  return {
    pass: true
  };
}

function assertYieldsWereCleared(root) {
  var Scheduler = root._Scheduler;
  var actualYields = Scheduler.unstable_clearYields();

  (function () {
    if (!(actualYields.length === 0)) {
      {
        throw ReactError(Error("Log of yielded values is not empty. Call expect(ReactTestRenderer).unstable_toHaveYielded(...) first."));
      }
    }
  })();
}

function unstable_toMatchRenderedOutput(root, expectedJSX) {
  assertYieldsWereCleared(root);
  var actualJSON = root.toJSON();
  var actualJSX;

  if (actualJSON === null || typeof actualJSON === 'string') {
    actualJSX = actualJSON;
  } else if (Array.isArray(actualJSON)) {
    if (actualJSON.length === 0) {
      actualJSX = null;
    } else if (actualJSON.length === 1) {
      actualJSX = jsonChildToJSXChild(actualJSON[0]);
    } else {
      var actualJSXChildren = jsonChildrenToJSXChildren(actualJSON);

      if (actualJSXChildren === null || typeof actualJSXChildren === 'string') {
        actualJSX = actualJSXChildren;
      } else {
        actualJSX = {
          $$typeof: REACT_ELEMENT_TYPE,
          type: REACT_FRAGMENT_TYPE,
          key: null,
          ref: null,
          props: {
            children: actualJSXChildren
          },
          _owner: null,
          _store: {}
        };
      }
    }
  } else {
    actualJSX = jsonChildToJSXChild(actualJSON);
  }

  return captureAssertion(function () {
    expect(actualJSX).toEqual(expectedJSX);
  });
}

function jsonChildToJSXChild(jsonChild) {
  if (jsonChild === null || typeof jsonChild === 'string') {
    return jsonChild;
  } else {
    var jsxChildren = jsonChildrenToJSXChildren(jsonChild.children);
    return {
      $$typeof: REACT_ELEMENT_TYPE,
      type: jsonChild.type,
      key: null,
      ref: null,
      props: jsxChildren === null ? jsonChild.props : objectAssign({}, jsonChild.props, {
        children: jsxChildren
      }),
      _owner: null,
      _store: {}
    };
  }
}

function jsonChildrenToJSXChildren(jsonChildren) {
  if (jsonChildren !== null) {
    if (jsonChildren.length === 1) {
      return jsonChildToJSXChild(jsonChildren[0]);
    } else if (jsonChildren.length > 1) {
      var jsxChildren = [];
      var allJSXChildrenAreStrings = true;
      var jsxChildrenString = '';

      for (var i = 0; i < jsonChildren.length; i++) {
        var jsxChild = jsonChildToJSXChild(jsonChildren[i]);
        jsxChildren.push(jsxChild);

        if (allJSXChildrenAreStrings) {
          if (typeof jsxChild === 'string') {
            jsxChildrenString += jsxChild;
          } else if (jsxChild !== null) {
            allJSXChildrenAreStrings = false;
          }
        }
      }

      return allJSXChildrenAreStrings ? jsxChildrenString : jsxChildren;
    }
  }

  return null;
}

exports.unstable_toMatchRenderedOutput = unstable_toMatchRenderedOutput;
  })();
}