protocol/packages/dev-tools-pages/ts/pages/cov.tsx

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

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

import { Base } from 'ts/components/base';
import { Breakout } from 'ts/components/breakout';
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 Cov: React.StatelessComponent<{}> = () => (
    <Base context={context}>
        <Hero>
            <Animation />
        </Hero>
        <Intro>
            <IntroLead title="Measure your tests">
                <p>
                    When it comes to writing smart contracts, testing is one of the most important steps of 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="#">ganache-cli</a> as a backing node.
                    </ListItem>
                    <ListItem>
                        Understand and use <a href="#">web3-provider-engine</a>.
                    </ListItem>
                </List>
            </ContentBlock>
            <ContentBlock title="Installation">
                <Breakout>
                    <Code>npm install @0x/sol-coverage --save</Code>
                </Breakout>

                <p>
                    Sol-cov is a subprovider that needs to be prepended to your <a href="#">provider engine</a>.
                    Depending on your project setup, you will need to use a specific ArtifactAdapter. Sol-cov ships with
                    the <InlineCode>SolCompilerArtifactAdapter</InlineCode> for use with <a href="#">Sol-compiler</a>{' '}
                    and <InlineCode>TruffleArtifactAdapter</InlineCode> for use with the{' '}
                    <a href="#">Truffle framework</a>. You can also write your own and support any artifact format.
                </p>

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

const projectRoot = '.';
const solcVersion = '0.4.24';
const artifactAdapter = new TruffleArtifactAdapter(projectRoot, solcVersion);`}
                        </Code>
                    </TabBlock>
                    <TabBlock title="Custom">
                        <Code language="javascript">
                            {`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>RevertTraceSubprovider</InlineCode> and append it to our provider engine.
                </p>

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

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

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

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

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