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< / script > < / nav > < / div > < div class = "container mainContainer docsContainer" > < div class = "wrapper" > < div class = "post" > < header class = "postHeader" > < a class = "edit-page-link button" href = "https://github.com/bitcoin-s/bitcoin-s/blob/master/docs/testkit/testkit.md" target = "_blank" rel = "noreferrer noopener" > Edit< / a > < h1 id = "__docusaurus" class = "postHeaderTitle" > Testkit< / h1 > < / header > < article > < div > < span > < h2 > < a class = "anchor" aria-hidden = "true" id = "philosophy-of-testkit" > < / a > < a href = "#philosophy-of-testkit" aria-hidden = "true" class = "hash-link" > < svg class = "hash-link-icon" aria-hidden = "true" height = "16" version = "1.1" viewBox = "0 0 16 16" width = "16" > < path fill-rule = "evenodd" d = "M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" > < / path > < / svg > < / a > Philosophy of Testkit< / h2 >
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< p > The high level of of the bitcoin-s testkit is to mimic and provide functionality to test 3rd party applications.< / p >
< p > There are other examples of these in the Scala ecosystem like the < code > akka-testkit< / code > and < code > slick-testkit< / code > .< / p >
< p > We use this testkit to test bitcoin-s it self.< / p >
< h3 > < a class = "anchor" aria-hidden = "true" id = "testkit-for-bitcoind" > < / a > < a href = "#testkit-for-bitcoind" aria-hidden = "true" class = "hash-link" > < svg class = "hash-link-icon" aria-hidden = "true" height = "16" version = "1.1" viewBox = "0 0 16 16" width = "16" > < path fill-rule = "evenodd" d = "M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" > < / path > < / svg > < / a > Testkit for bitcoind< / h3 >
< p > This gives the ability to create and destroy < code > bitcoind< / code > on the underlying operating system to test against.< / p >
< p > Make sure you have run < code > sbt downloadBitcoind< / code > before running this example, as you need access to the bitcoind binaries.< / p >
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< p > Our < a href = "/api/org/bitcoins/rpc/client/common/BitcoindRpcClient" > BitcoindRpcClient< / a > is tested with the functionality provided in the testkit.
A quick example of a useful utility method is < a href = "/api/org/bitcoins/testkit/rpc/BitcoindRpcTestUtil" > BitcoindRpcTestUtil.startedBitcoindRpcClient()< / a > .
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This spins up a bitcoind regtest instance on machine and generates 101 blocks on that node.< / p >
< p > This gives you the ability to start spending money immediately with that bitcoind node.< / p >
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< pre > < code class = "hljs css language-scala" > < span class = "hljs-keyword" > implicit< / span > < span class = "hljs-keyword" > val< / span > system = < span class = "hljs-type" > ActorSystem< / span > (< span class = "hljs-string" > "bitcoind-testkit-example"< / span > )
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< span class = "hljs-keyword" > implicit< / span > < span class = "hljs-keyword" > val< / span > ec = system.dispatcher
< span class = "hljs-comment" > //pick our bitcoind version we want to spin up< / span >
< span class = "hljs-comment" > //you can pick older versions if you want< / span >
< span class = "hljs-comment" > //we support versions 16-19< / span >
< span class = "hljs-keyword" > val< / span > bitcoindV = < span class = "hljs-type" > BitcoindVersion< / span > .< span class = "hljs-type" > V19< / span >
< span class = "hljs-comment" > //create an instance< / span >
< span class = "hljs-keyword" > val< / span > instance = < span class = "hljs-type" > BitcoindRpcTestUtil< / span > .instance(versionOpt = < span class = "hljs-type" > Some< / span > (bitcoindV))
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< span class = "hljs-comment" > //now let's create an rpc client off of that instance< / span >
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< span class = "hljs-keyword" > val< / span > bitcoindRpcClientF = < span class = "hljs-type" > BitcoindRpcTestUtil< / span > .startedBitcoindRpcClient(instance, < span class = "hljs-type" > Vector< / span > .newBuilder)
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< span class = "hljs-comment" > //yay! it's started. Now you can run tests against this.< / span >
< span class = "hljs-comment" > //let's just grab the block count for an example< / span >
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< span class = "hljs-keyword" > val< / span > blockCountF = < span class = "hljs-keyword" > for< / span > {
bitcoind < - bitcoindRpcClientF
count < - bitcoind.getBlockCount
} < span class = "hljs-keyword" > yield< / span > {
< span class = "hljs-comment" > //run a test against the block count< / span >
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assert(count > < span class = "hljs-number" > 0< / span > , < span class = "hljs-string" > s"Block count was not more than zero!"< / span > )
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}
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< span class = "hljs-comment" > //when you are done, don't forget to destroy it! Otherwise it will keep running on the underlying os< / span >
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< span class = "hljs-keyword" > val< / span > stoppedF = < span class = "hljs-keyword" > for< / span > {
rpc < - bitcoindRpcClientF
_ < - blockCountF
stopped < - < span class = "hljs-type" > BitcoindRpcTestUtil< / span > .stopServers(< span class = "hljs-type" > Vector< / span > (rpc))
} < span class = "hljs-keyword" > yield< / span > stopped
< / code > < / pre >
< p > For more information on how the bitcoind rpc client works, see our < a href = "/docs/next/rpc/rpc-bitcoind" > bitcoind rpc docs< / a > < / p >
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< h4 > < a class = "anchor" aria-hidden = "true" id = "caching-bitcoind-in-test-cases" > < / a > < a href = "#caching-bitcoind-in-test-cases" aria-hidden = "true" class = "hash-link" > < svg class = "hash-link-icon" aria-hidden = "true" height = "16" version = "1.1" viewBox = "0 0 16 16" width = "16" > < path fill-rule = "evenodd" d = "M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" > < / path > < / svg > < / a > Caching bitcoind in test cases< / h4 >
< p > When doing integration tests with bitcoind, you likely do not want to spin up a
new bitcoind for < em > every< / em > test that is run.< / p >
< p > Not to fear, when using < code > testkit< / code > you can use our bitcoind fixtures for your unit tests!
These will only spin up on bitcoind per test suite, rather than one bitcoind per test.< / p >
< p > We currently have two types of fixtures available to users of this dependency< / p >
< ol >
< li > < a href = "https://github.com/bitcoin-s/bitcoin-s/blob/eaac9c154c25f3bd76615ea2151092f06df6bdb4/testkit/src/main/scala/org/bitcoins/testkit/rpc/BitcoindFixtures.scala#L282" > Connected pairs of bitcoind nodes< / a > < / li >
< li > < a href = "https://github.com/bitcoin-s/bitcoin-s/blob/eaac9c154c25f3bd76615ea2151092f06df6bdb4/testkit/src/main/scala/org/bitcoins/testkit/rpc/BitcoindFixtures.scala#L161" > Bitcoind nodes with funded wallets< / a > < / li >
< / ol >
< p > If you mixin either of those traits for your test, you will now have access to the corresponding fixture.< / p >
< p > You can find an examples of how to use these two test fixtures< / p >
< ol >
< li > < a href = "https://github.com/bitcoin-s/bitcoin-s/blob/32a6db930bdf849a94d92cd1de160b87845ab168/bitcoind-rpc-test/src/test/scala/org/bitcoins/rpc/common/WalletRpcTest.scala#L37" > Example of using a connected pair of nodes in test suite< / a > < / li >
< li > < a href = "https://github.com/bitcoin-s/bitcoin-s/blob/eaac9c154c25f3bd76615ea2151092f06df6bdb4/testkit/src/main/scala/org/bitcoins/testkit/rpc/BitcoindFixtures.scala#L161" > Example of using a bitcoind with funded wallet in test suite< / a > < / li >
< / ol >
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< h3 > < a class = "anchor" aria-hidden = "true" id = "testkit-for-eclair" > < / a > < a href = "#testkit-for-eclair" aria-hidden = "true" class = "hash-link" > < svg class = "hash-link-icon" aria-hidden = "true" height = "16" version = "1.1" viewBox = "0 0 16 16" width = "16" > < path fill-rule = "evenodd" d = "M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" > < / path > < / svg > < / a > Testkit for eclair< / h3 >
< p > We have similar utility methods for eclair. Eclair's testkit requires a bitcoind running (which we can spin up thanks to our bitcoind testkit).< / p >
< p > Here is an example of spinning up an eclair lightning node, that is connected to a bitcoind and testing your lightning application.< / p >
< p > Make sure to run < code > sbt downloadBitcoind downloadEclair< / code > before running this so you have access to the underlying eclair binares< / p >
< pre > < code class = "hljs css language-scala" > < span class = "hljs-comment" > //Steps:< / span >
< span class = "hljs-comment" > //1. Open and confirm channel on the underlying blockchain (regtest)< / span >
< span class = "hljs-comment" > //2. pay an invoice< / span >
< span class = "hljs-comment" > //3. Await until the payment is processed< / span >
< span class = "hljs-comment" > //4. assert the node has received the payment< / span >
< span class = "hljs-comment" > //5. cleanup< / span >
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< span class = "hljs-keyword" > implicit< / span > < span class = "hljs-keyword" > val< / span > system = < span class = "hljs-type" > ActorSystem< / span > (< span class = "hljs-string" > "eclair-testkit-example"< / span > )
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< span class = "hljs-keyword" > implicit< / span > < span class = "hljs-keyword" > val< / span > ec = system.dispatcher
< span class = "hljs-comment" > //we need a bitcoind to connect eclair nodes to< / span >
< span class = "hljs-keyword" > lazy< / span > < span class = "hljs-keyword" > val< / span > bitcoindRpcClientF: < span class = "hljs-type" > Future< / span > [< span class = "hljs-type" > BitcoindRpcClient< / span > ] = {
< span class = "hljs-keyword" > for< / span > {
cli < - < span class = "hljs-type" > EclairRpcTestUtil< / span > .startedBitcoindRpcClient()
< span class = "hljs-comment" > // make sure we have enough money to open channels< / span >
address < - cli.getNewAddress
_ < - cli.generateToAddress(< span class = "hljs-number" > 200< / span > , address)
} < span class = "hljs-keyword" > yield< / span > cli
}
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< span class = "hljs-comment" > //let's create two eclair nodes now< / span >
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< span class = "hljs-keyword" > val< / span > clientF = < span class = "hljs-keyword" > for< / span > {
bitcoind < - bitcoindRpcClientF
e < - < span class = "hljs-type" > EclairRpcTestUtil< / span > .randomEclairClient(< span class = "hljs-type" > Some< / span > (bitcoind))
} < span class = "hljs-keyword" > yield< / span > e
< span class = "hljs-keyword" > val< / span > otherClientF = < span class = "hljs-keyword" > for< / span > {
bitcoind < - bitcoindRpcClientF
e < - < span class = "hljs-type" > EclairRpcTestUtil< / span > .randomEclairClient(< span class = "hljs-type" > Some< / span > (bitcoind))
} < span class = "hljs-keyword" > yield< / span > e
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< span class = "hljs-comment" > //great, setup done! Let's run the test< / span >
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< span class = "hljs-comment" > //to verify we can send a payment over the channel< / span >
< span class = "hljs-keyword" > for< / span > {
client < - clientF
otherClient < - otherClientF
_ < - < span class = "hljs-type" > EclairRpcTestUtil< / span > .openAndConfirmChannel(clientF, otherClientF)
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invoice < - otherClient.createInvoice(< span class = "hljs-string" > "abc"< / span > , < span class = "hljs-number" > 50.< / span > msats)
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info < - otherClient.getInfo
_ = assert(info.nodeId == invoice.nodeId)
infos < - client.getSentInfo(invoice.lnTags.paymentHash.hash)
_ = assert(infos.isEmpty)
paymentId < - client.payInvoice(invoice)
_ < - < span class = "hljs-type" > EclairRpcTestUtil< / span > .awaitUntilPaymentSucceeded(client, paymentId)
sentInfo < - client.getSentInfo(invoice.lnTags.paymentHash.hash)
} < span class = "hljs-keyword" > yield< / span > {
assert(sentInfo.head.amount == < span class = "hljs-number" > 50.< / span > msats)
}
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< span class = "hljs-comment" > //don't forget to shutdown everything!< / span >
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< span class = "hljs-keyword" > val< / span > stop1F = clientF.map(c => < span class = "hljs-type" > EclairRpcTestUtil< / span > .shutdown(c))
< span class = "hljs-keyword" > val< / span > stop2F = otherClientF.map(o => < span class = "hljs-type" > EclairRpcTestUtil< / span > .shutdown(o))
< span class = "hljs-keyword" > val< / span > stoppedBitcoindF = < span class = "hljs-keyword" > for< / span > {
bitcoind < - bitcoindRpcClientF
_ < - < span class = "hljs-type" > BitcoindRpcTestUtil< / span > .stopServers(< span class = "hljs-type" > Vector< / span > (bitcoind))
} < span class = "hljs-keyword" > yield< / span > ()
< span class = "hljs-keyword" > val< / span > resultF = < span class = "hljs-keyword" > for< / span > {
_ < - stop1F
_ < - stop2F
_ < - stoppedBitcoindF
_ < - system.terminate()
} < span class = "hljs-keyword" > yield< / span > ()
< span class = "hljs-type" > Await< / span > .result(resultF, < span class = "hljs-number" > 180.< / span > seconds)
< / code > < / pre >
< h3 > < a class = "anchor" aria-hidden = "true" id = "other-modules" > < / a > < a href = "#other-modules" aria-hidden = "true" class = "hash-link" > < svg class = "hash-link-icon" aria-hidden = "true" height = "16" version = "1.1" viewBox = "0 0 16 16" width = "16" > < path fill-rule = "evenodd" d = "M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" > < / path > < / svg > < / a > Other modules< / h3 >
< p > You may find useful testkit functionality for other modules here< / p >
< ol >
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< li > < a href = "/api/org/bitcoins/testkit/chain/ChainUnitTest" > Chain< / a > < / li >
< li > < a href = "/api/org/bitcoins/testkit/keymanager/KeyManagerApiUnitTest" > Key Manager< / a > < / li >
< li > < a href = "/api/org/bitcoins/testkit/wallet/BitcoinSWalletTest" > Wallet< / a > < / li >
< li > < a href = "/api/org/bitcoins/testkit/node/NodeUnitTest" > Node< / a > < / li >
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< / ol >
< p > In general, you will find constructors and destructors of fixtures that can be useful when testing your applications
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if you are using any of those modules.< / p >
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< / span > < / div > < / article > < / div > < div class = "docs-prevnext" > < a class = "docs-prev button" href = "/docs/next/secp256k1/jni-modify" > < span class = "arrow-prev" > ← < / span > < span > Adding to Secp256k1 JNI< / span > < / a > < a class = "docs-next button" href = "/docs/next/testkit/testkit-core" > < span > Testkit Core< / span > < span class = "arrow-next" > →< / span > < / a > < / div > < / div > < / div > < nav class = "onPageNav" > < ul class = "toc-headings" > < li > < a href = "#philosophy-of-testkit" > Philosophy of Testkit< / a > < ul class = "toc-headings" > < li > < a href = "#testkit-for-bitcoind" > Testkit for bitcoind< / a > < / li > < li > < a href = "#testkit-for-eclair" > Testkit for eclair< / a > < / li > < li > < a href = "#other-modules" > Other modules< / a > < / li > < / ul > < / li > < / ul > < / nav > < / div > < footer class = "nav-footer" id = "footer" > < section class = "sitemap" > < a href = "/" class = "nav-home" > < img src = "/img/favicon.ico" alt = "bitcoin-s" width = "66" height = "58" / > < / a > < div > < h5 > Docs< / h5 > < a href = "/docs/en/getting-started" > Getting Started< / a > < a href = "/docs/en/core/core-intro" > Guides< / a > < a href = "/api/org/bitcoins" > API Reference< / a > < / div > < div > < h5 > Community< / h5 > < a href = "/en/users.html" > User Showcase< / a > < a href = "https://join.slack.com/t/suredbits/shared_invite/zt-eavycu0x-WQL7XOakzQo8tAy7jHHZUw" target = "_blank" rel = "noreferrer noopener" > Slack< / a > < a href = "https://gitter.im/bitcoin-s-core/" > Gitter chat< / a > < / div > < div > < h5 > More< / h5 > < a href = "https://github.com/bitcoin-s/bitcoin-s" > GitHub< / a > < a class = "github-button" href = "https://github.com/bitcoin-s/bitcoin-s" data-icon = "octicon-star" data-count-href = "/bitcoin-s/bitcoin-s-core/stargazers" data-show-count = "true" data-count-aria-label = "# stargazers on GitHub" aria-label = "Star this project on GitHub" > Star< / a > < / div > < / section > < section class = "copyright" > Copyright © 2021 Suredbits & the bitcoin-s developers< / section > < / footer > < / div > < script type = "text/javascript" src = "https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.js" > < / script > < script >
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