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feat(SELENIUM_PROMISE_MANAGER): Support
SELENIUM_PROMISE_MANAGER=0
There are three major ways this was done in this change: * In `callWhenIdle`, if `flow.isIdle` is not defined, we assume we are working with a `SimpleScheduler` instance, and so the flow is effectively idle. * In `initJasmineWd`, if `flow.reset` is not defined, we assume we are working with a `SimpleScheduler` instance, and so don't bother resetting the flow. * In `wrapInControlFlow`, we use `flow.promise` to create a new promise if possible. Since `new webdriver.promise.Promise()` would have always made a `ManagedPromise`, but `flow.promise` will do the right thing. * In `wrapCompare`, we avoid the webdriver library entirely, and never instance any extra promises. Using `webdriver.promise.when` and `webdriver.promise.all` could have been a problem if our instance of `webdriver` had the control flow turned on, but another instance somewhere did not (or even the same instance, but just at a different point in time). Instead we use the new `maybePromise` tool, which is a mess but is also exactly what we want. * In `specs/*`, we replace `webdriver.promise.fulfilled` with `webdriver.promise.when`. * In `specs/*`, a new version of `adapterSpec.js` and `errorSpec.js` are created: `asyncAwaitAdapterSpec.ts` and `asyncAwaitErrorSpec.ts`. I also also fixed a minor bug where we weren't correctly checking for promises inside an array of expected results. Before we had ```js expected = Array.prototype.slice.call(arguments, 0) ... webdriver.promise.isPromise(expected) ``` I thought about it for a little while, and there's no way that's correct. `expected` is an `Array<any>`, there's no way it has a `.then` function. Closes #69
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,3 +1,4 @@ | ||
| *.log | ||
| node_modules | ||
| spec/asyncAwaitSpec.js | ||
| spec/asyncAwait*Spec.js | ||
| spec/common.js |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1 +1,3 @@ | ||
| ./spec/asyncAwaitSpec.js | ||
| ./spec/asyncAwaitAdapterSpec.js | ||
| ./spec/asyncAwaitErrorSpec.js | ||
| ./spec/common.js |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| /** | ||
| * This file implements jasminewd's peculiar alternatives to Promise.resolve() | ||
| * and Promise.all(). Do not use the code from this file as pollyfill for | ||
| * Promise.resolve() or Promise.all(). There are a number of reasons why this | ||
| * implementation will cause unexpected errors in most codebases. | ||
| * | ||
| * Called "maybePromise" because both the parameters and the return values may | ||
| * or may not be promises, and code execution may or may not be synchronous. | ||
| */ | ||
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| /** | ||
| * Runs a callback synchronously against non-promise values and asynchronously | ||
| * against promises. Similar to ES6's `Promise.resolve` except that it is | ||
| * synchronous when possible and won't wrap the return value. | ||
| * | ||
| * This is not what you normally want. Normally you want the code to be | ||
| * consistently asynchronous, and you want the result wrapped into a promise. | ||
| * But because of webdriver's control flow, we're better off not introducing any | ||
| * extra layers of promises or asynchronous activity. | ||
| * | ||
| * @param {*} val The value to call the callback with. | ||
| * @param {!Function} callback The callback function | ||
| * @return {*} If val isn't a promise, the return value of the callback is | ||
| * directly returned. If val is a promise, a promise (generated by val.then) | ||
| * resolving to the callback's return value is returned. | ||
| */ | ||
| var maybePromise = module.exports = function maybePromise(val, callback) { | ||
| if (val && (typeof val.then == 'function')) { | ||
| return val.then(callback); | ||
| } else { | ||
| return callback(val); | ||
| } | ||
| } | ||
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| /** | ||
| * Like maybePromise() but for an array of values. Analogous to `Promise.all`. | ||
| * | ||
| * @param {!Array<*>} vals An array of values to call the callback with | ||
| * @param {!Function} callback the callback function | ||
| * @return {*} If nothing in vals is a promise, the return value of the callback | ||
| * is directly returned. Otherwise, a promise (generated by the .then | ||
| * functions in vals) resolving to the callback's return value is returned. | ||
| */ | ||
| maybePromise.all = function all(vals, callback) { | ||
| var resolved = new Array(vals.length); | ||
| function resolveAt(i) { | ||
| if (i >= vals.length) { | ||
| return callback(resolved); | ||
| } else { | ||
| return maybePromise(vals[i], function(val) { | ||
| resolved[i] = val; | ||
| return resolveAt(i+1); | ||
| }); | ||
| } | ||
| } | ||
| return resolveAt(0); | ||
| } | ||
|
|
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,21 +1,59 @@ | ||
| LIB_SPECS="spec/support/lib_specs.json" | ||
| PASSING_SPECS="spec/support/passing_specs.json" | ||
| FAILING_SPECS="spec/support/failing_specs.json" | ||
| NO_CF_PASSING_SPECS="spec/support/no_cf_passing_specs.json" | ||
| NO_CF_FAILING_SPECS="spec/support/no_cf_failing_specs.json" | ||
| CMD_BASE="node node_modules/.bin/jasmine JASMINE_CONFIG_PATH=" | ||
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| echo "### running passing specs" | ||
| # Run unit tests | ||
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| echo "### running all unit tests" | ||
| CMD=$CMD_BASE$LIB_SPECS | ||
| echo "### $CMD" | ||
| $CMD | ||
| [ "$?" -eq 0 ] || exit 1 | ||
| echo | ||
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| # Run all tests when the control flow is enabled | ||
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| export SELENIUM_PROMISE_MANAGER=1 | ||
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| echo "### running all passing specs" | ||
| CMD=$CMD_BASE$PASSING_SPECS | ||
| echo "### $CMD" | ||
| $CMD | ||
| [ "$?" -eq 0 ] || exit 1 | ||
| echo | ||
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| EXPECTED_RESULTS="18 specs, 16 failures" | ||
| echo "### running failing specs (expecting $EXPECTED_RESULTS)" | ||
| EXPECTED_RESULTS="38 specs, 34 failures" | ||
| echo "### running all failing specs (expecting $EXPECTED_RESULTS)" | ||
| CMD=$CMD_BASE$FAILING_SPECS | ||
| echo "### $CMD" | ||
| res=`$CMD 2>/dev/null` | ||
| results_line=`echo "$res" | tail -2 | head -1` | ||
| echo "result: $results_line" | ||
| [ "$results_line" = "$EXPECTED_RESULTS" ] || exit 1 | ||
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| # Run only the async/await tests when the control flow is disabled | ||
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| export SELENIUM_PROMISE_MANAGER=0 | ||
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| echo "### running async/await passing specs" | ||
| CMD=$CMD_BASE$NO_CF_PASSING_SPECS | ||
| echo "### $CMD" | ||
| $CMD | ||
| [ "$?" -eq 0 ] || exit 1 | ||
| echo | ||
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| EXPECTED_RESULTS="19 specs, 17 failures" | ||
| echo "### running async/await failing specs (expecting $EXPECTED_RESULTS)" | ||
| CMD=$CMD_BASE$NO_CF_FAILING_SPECS | ||
| echo "### $CMD" | ||
| res=`$CMD 2>/dev/null` | ||
| results_line=`echo "$res" | tail -2 | head -1` | ||
| echo "result: $results_line" | ||
| [ "$results_line" = "$EXPECTED_RESULTS" ] || exit 1 | ||
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| echo "all pass" |
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