path: root/packages/dev-tools-pages/ts/pages/coverage.tsx

import * as React from 'react';
import { hydrate, render } from 'react-dom';
import * as Loadable from 'react-loadable';

import { context } from 'ts/context/coverage';

import { Base } from 'ts/components/base';
import { Breakout } from 'ts/components/breakout';
import { CallToAction } from 'ts/components/call_to_action';
import { Code } from 'ts/components/code';
import { Content } from 'ts/components/content';
import { ContentBlock } from 'ts/components/content-block';
import { Hero } from 'ts/components/hero';
import { InlineCode } from 'ts/components/inline-code';
import { Intro, IntroAside, IntroLead } from 'ts/components/intro';
import { List, ListItem } from 'ts/components/list';
import { TabBlock, Tabs } from 'ts/components/tabs';

const Animation = Loadable({
    loader: () => System.import(/* webpackChunkName: 'cov-animation' */ 'ts/components/animations/cov'),
    loading: () => <div />,
    delay: 1000,
    render(loadable: { CovAnimation: any }): React.ReactNode {
        const Component = loadable.CovAnimation;
        return <Component />;
    },
});

const Coverage: React.StatelessComponent<{}> = () => (
    <Base context={context}>
        <Hero>
            <Animation />
        </Hero>
        <Intro>
            <IntroLead title="Measure your tests">
                <p>
                    When it comes to writing secure smart contracts, testing is one of the most important steps in the
                    process. In order to quantify the robustness of your Solidity testing suite, you need to measure its
                    code coverage.
                </p>
            </IntroLead>
            <IntroAside>
                <Code
                    language="javascript"
                    isDiff={true}
                    gutterLength={2}
                    gutter={[4, undefined, 4, 4, 4, undefined, 4, 2, 2, 2]}
                >
                    {`+function executeTransaction(uint transactionId)
     public
+    notExecuted(transactionId)
+    fullyConfirmed(transactionId)
+    pastTimeLock(transactionId)
{
+    Transaction storage tx = transactions[transactionId]
+    tx.executed = true
+    if (tx.destination.call.value(tx.value)(tx.data))
+        Execution(transactionId)
     else {
-        ExecutionFailure(transactionId)
-        tx.executed = false
    }
}`}
                </Code>
            </IntroAside>
        </Intro>

        <Content>
            <ContentBlock main={true} title="Get started" />
            <ContentBlock title="Prerequisites">
                <List>
                    <ListItem>
                        Use{' '}
                        <a href="https://github.com/ethereum/go-ethereum" target="_blank">
                            Geth
                        </a>{' '}
                        as a backing node. We recommend using our{' '}
                        <a href="https://hub.docker.com/r/0xorg/devnet" target="_blank">
                            Devnet Docker container
                        </a>{' '}
                        which sets up a Geth node for testing purposes.{' '}
                        <a href="https://github.com/0xProject/0x-monorepo/issues/1520" target="_blank">
                            Ganache support is a work in progress.
                        </a>
                    </ListItem>
                    <ListItem>
                        Understand and use{' '}
                        <a href="https://github.com/MetaMask/provider-engine" target="_blank">
                            web3-provider-engine
                        </a>
                        .
                    </ListItem>
                </List>
            </ContentBlock>
            <ContentBlock title="Installation">
                <Breakout>
                    <Code canCopy={true}>npm install @0x/sol-coverage --save</Code>
                </Breakout>

                <p>
                    Sol-coverage is a subprovider that needs to be prepended to your{' '}
                    <a href="https://github.com/MetaMask/provider-engine" target="_blank">
                        provider engine
                    </a>
                    . Depending on your project setup, you will need to use a specific ArtifactAdapter. Sol-coverage
                    ships with the <InlineCode>SolCompilerArtifactAdapter</InlineCode> for use with{' '}
                    <a href="https://sol-compiler.com" target="_blank">
                        Sol-compiler
                    </a>{' '}
                    and <InlineCode>TruffleArtifactAdapter</InlineCode> for use with the{' '}
                    <a href="https://truffleframework.com/truffle" target="_blank">
                        Truffle framework
                    </a>{' '}
                    (Also see our{' '}
                    <a href="https://github.com/0xProject/dev-tools-truffle-example" target="_blank">
                        Truffle example project
                    </a>{' '}
                    for a complete walk-through). You can also write your own and support any artifact format.
                </p>

                <Tabs>
                    <TabBlock title="Sol-compiler">
                        <Code language="javascript" canCopy={true}>
                            {`import { SolCompilerArtifactAdapter } from '@0x/sol-trace';

// Both artifactsDir and contractsDir are optional and will be fetched from compiler.json if not passed in
const artifactAdapter = new SolCompilerArtifactAdapter(artifactsDir, contractsDir);`}
                        </Code>
                    </TabBlock>
                    <TabBlock title="Truffle">
                        <Code language="javascript" canCopy={true}>
                            {`import { TruffleArtifactAdapter } from '@0x/sol-trace';

const projectRoot = '.';
const solcVersion = '0.5.0';
const artifactAdapter = new TruffleArtifactAdapter(projectRoot, solcVersion);`}
                        </Code>
                    </TabBlock>
                    <TabBlock title="Custom">
                        <Code language="javascript" canCopy={true}>
                            {`import { AbstractArtifactAdapter } from '@0x/sol-trace';

class YourCustomArtifactsAdapter extends AbstractArtifactAdapter {...};
const artifactAdapter = new YourCustomArtifactsAdapter(...);`}
                        </Code>
                    </TabBlock>
                </Tabs>
                <p>
                    Now that we have an <InlineCode>artifactAdapter</InlineCode>, we can create a{' '}
                    <InlineCode>CoverageSubprovider</InlineCode> and append it to our provider engine.
                </p>

                <Breakout>
                    <Code language="javascript" canCopy={true}>
                        {`import { ProviderEngine, RpcSubprovider } from 'web3-provider-engine';
import { CoverageSubprovider } from '@0x/sol-coverage';

const defaultFromAddress = "..."; // Some ethereum address with test funds
const coverageSubprovider = new CoverageSubprovider(artifactAdapter, defaultFromAddress);

const providerEngine = new ProviderEngine();
providerEngine.addProvider(coverageSubprovider);
providerEngine.addProvider(new RpcSubprovider({rpcUrl: 'http://localhost:8545'}));
providerEngine.start();`}
                    </Code>
                </Breakout>
            </ContentBlock>
        </Content>
        <CallToAction />
    </Base>
);

const root = document.getElementById('app');

if (root.hasChildNodes()) {
    hydrate(<Coverage />, root);
} else {
    render(<Coverage />, root);
}