Add tests for the CLI command

.changeset/chatty-buses-drop.md

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+---
+---

src/__snapshots__/cli.test.ts.snap

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+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
+
+exports[`cli tests should match help output 1`] = `
+"cli.js [command]
+
+Commands:
+  cli.js print-api3readerproxyv1-address  Prints the dApp-specific
+                                          Api3ReaderProxyV1 address
+  cli.js compute-dapp-id                  Computes the dApp ID for a given dApp
+                                          alias and chain ID
+
+Options:
+  --version  Show version number                                       [boolean]
+  --help     Show help                                                 [boolean]"
+`;
+
+exports[`cli tests should succeed print-api3readerproxyv1-address on mantle 1`] = `
+"dApp alias: lendle
+chain: Mantle
+dAPI name: ETH/USD
+• Please confirm that https://market.api3.org/mantle/eth-usd points to an active feed.
+• Your proxy is at https://mantlescan.xyz/address/0x776E79D916e49BBDb8FEe0F43fF148C2Ed3bE125
+Please confirm that there is a contract deployed at this address before using it."
+`;
+
+exports[`cli tests should succeed print-api3readerproxyv1-address on sonic 1`] = `
+"dApp alias: mach-finance
+chain: Sonic
+dAPI name: S/USD
+• Please confirm that https://market.api3.org/sonic/s-usd points to an active feed.
+• Your proxy is at https://sonicscan.org/address/0x2551A2a96988829D2a55c3b02b88E138023D1cE8
+Please confirm that there is a contract deployed at this address before using it."
+`;

src/cli.test.ts

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+import { execSync } from 'node:child_process';
+
+import { goSync } from '@api3/promise-utils';
+
+const CLI_EXECUTABLE = 'dist/src/cli.js';
+
+type CommandArg = [string, string | number | boolean];
+
+describe('cli tests', () => {
+  const execCommand = (command: string, ...args: CommandArg[]) => {
+    const formattedCommand = [command, ...args.flatMap(([c, a]) => [c, String(a)])].join(' ');
+    const goExecSync = goSync(() =>
+      execSync(`node ${CLI_EXECUTABLE} ${formattedCommand}`, {
+        stdio: ['pipe', 'pipe', 'pipe'],
+      })
+    );
+    if (!goExecSync.success) {
+      // rethrow the output of the CLI
+      throw new Error((goExecSync.error as any).reason.stderr.toString().trim());
+    }
+
+    const stdout = goExecSync.data?.toString().trim() || '';
+    return stdout;
+  };
+
+  it('should throw an error for an unknown chain id', () => {
+    expect(() => {
+      execCommand('compute-dapp-id', ['--dapp-alias', 'lendle'], ['--chain-id', '0']);
+    }).toThrow('⚠️  Chain with ID 0 is not known');
+  });
+
+  it('should throw an error for an unknown dApp alias', () => {
+    expect(() => {
+      execCommand('compute-dapp-id', ['--dapp-alias', 'unsupported-dapp'], ['--chain-id', '5000']);
+    }).toThrow('⚠️  Could not find any record for alias "unsupported-dapp"');
+  });
+
+  it('should throw an error for unsupported chain ID', () => {
+    expect(() => {
+      execCommand('compute-dapp-id', ['--dapp-alias', 'lendle'], ['--chain-id', '1']);
+    }).toThrow('⚠️  dApp alias "lendle" is not available on chain "Ethereum"');
+  });
+
+  it('should return an invalid output if strict is false', () => {
+    const output = execCommand(
+      'compute-dapp-id',
+      ['--dapp-alias', 'unsupported-dapp'],
+      ['--chain-id', '0'],
+      ['--strict', false]
+    );
+    expect(output).toMatch(
+      'dApp alias: unsupported-dapp\nchain: 0\n\n• dApp ID: 113044575011858809962820051290270246401920929513853405225169263442003318378526'
+    );
+  });
+
+  it('should compute dApp ID for lendle on mantle', () => {
+    const output = execCommand('compute-dapp-id', ['--dapp-alias', 'lendle'], ['--chain-id', '5000']);
+    expect(output).toMatch(
+      'dApp alias: lendle\nchain: Mantle\n\n• dApp ID: 3006187377348428698321862179080566497381498372321749245241868771911713393091'
+    );
+  });
+
+  it('should compute dApp ID for mach-finance on sonic', () => {
+    const output = execCommand('compute-dapp-id', ['--dapp-alias', 'mach-finance'], ['--chain-id', '146']);
+    expect(output).toMatch(
+      'dApp alias: mach-finance\nchain: Sonic\n\n• dApp ID: 103191103032841018751746810000516216875988320776131204933373404128958541332502'
+    );
+  });
+
+  it('should match help output', () => {
+    const output = execCommand('help');
+    expect(output).toMatchSnapshot();
+  });
+
+  it('should throw an error for an unknown chain id while checking Api3ReaderProxyV1 address', () => {
+    expect(() => {
+      execCommand(
+        'print-api3readerproxyv1-address',
+        ['--dapp-alias', 'unsupported-dapp'],
+        ['--chain-id', '0'],
+        ['--dapi-name', 'ETH/USD']
+      );
+    }).toThrow('Chain with ID 0 is not known');
+  });
+
+  it('should throw an error for an unknown dApp alias while checking Api3ReaderProxyV1 address', () => {
+    expect(() => {
+      execCommand(
+        'print-api3readerproxyv1-address',
+        ['--dapp-alias', 'unsupported-dapp'],
+        ['--chain-id', '5000'],
+        ['--dapi-name', 'ETH/USD']
+      );
+    }).toThrow('⚠️ Could not find any record for alias "unsupported-dapp"');
+  });
+
+  it('should throw an error for an unsupported dApi name', () => {
+    expect(() => {
+      execCommand(
+        'print-api3readerproxyv1-address',
+        ['--dapp-alias', 'lendle'],
+        ['--chain-id', '5000'],
+        ['--dapi-name', 'UNSUPPORTED/USD']
+      );
+    }).toThrow('⚠️ Attempted to read the feed and failed');
+  });
+
+  it('should succeed print-api3readerproxyv1-address on mantle', () => {
+    const output = execCommand(
+      'print-api3readerproxyv1-address',
+      ['--dapp-alias', 'lendle'],
+      ['--chain-id', '5000'],
+      ['--dapi-name', 'ETH/USD']
+    );
+    expect(output).toMatchSnapshot();
+  });
+
+  it('should succeed print-api3readerproxyv1-address on sonic', () => {
+    const output = execCommand(
+      'print-api3readerproxyv1-address',
+      ['--dapp-alias', 'mach-finance'],
+      ['--chain-id', '146'],
+      ['--dapi-name', 'S/USD']
+    );
+    expect(output).toMatchSnapshot();
+  });
+});