feat: support c8 report

lib/cmd/cov.js

@@ -30,6 +30,19 @@ class CovCommand extends Command {
         type: 'string',
         default: '--temp-directory ./node_modules/.nyc_output -r text-summary -r json-summary -r json -r lcov',
       },
+      c8: {
+        description: 'c8 instruments passthrough',
+        type: 'string',
+        default: '--temp-directory ./coverage/tmp -r text-summary -r json-summary -r json -r lcov',
+      },
+      'c8-report': {
+        description: 'run test && use c8 to report coverage',
+        type: 'boolean',
+      },
+      'c8-report-only': {
+        description: 'no run test, only use c8 to report coverage only',
+        type: 'boolean',
+      },
     };
 
     // you can add ignore dirs here
@@ -68,12 +81,6 @@ class CovCommand extends Command {
       this.addExclude(exclude);
     }
 
-    const nycCli = require.resolve('nyc/bin/nyc.js');
-    const coverageDir = path.join(cwd, 'coverage');
-    yield rimraf(coverageDir);
-    const outputDir = path.join(cwd, 'node_modules/.nyc_output');
-    yield rimraf(outputDir);
-
     const opt = {
       cwd,
       execArgv,
@@ -87,12 +94,32 @@ class CovCommand extends Command {
     if (context.argv.typescript) {
       opt.env.SPAWN_WRAP_SHIM_ROOT = path.join(cwd, 'node_modules');
     }
-
-    // save coverage-xxxx.json to $PWD/coverage
-    const covArgs = yield this.getCovArgs(context);
-    if (!covArgs) return;
-    debug('covArgs: %j', covArgs);
-    yield this.helper.forkNode(nycCli, covArgs, opt);
+    if (argv['c8-report-only']) {
+      const c8Cli = require.resolve('c8/bin/c8.js');
+      const covArgs = yield this.getCovArgs(context);
+      covArgs.unshift('report');
+      yield this.helper.forkNode(c8Cli, covArgs, opt);
+    } else if (argv['c8-report']) {
+      // save coverage-xxxx.json to $PWD/coverage
+      const c8Cli = require.resolve('c8/bin/c8.js');
+      const coverageDir = path.join(cwd, 'coverage');
+      yield rimraf(coverageDir);
+      const covArgs = yield this.getCovArgs(context);
+      if (!covArgs) return;
+      debug('covArgs: %j', covArgs);
+      yield this.helper.forkNode(c8Cli, covArgs, opt);
+    } else {
+      const nycCli = require.resolve('nyc/bin/nyc.js');
+      const coverageDir = path.join(cwd, 'coverage');
+      yield rimraf(coverageDir);
+      const outputDir = path.join(cwd, 'node_modules/.nyc_output');
+      yield rimraf(outputDir);
+      // save coverage-xxxx.json to $PWD/coverage
+      const covArgs = yield this.getCovArgs(context);
+      if (!covArgs) return;
+      debug('covArgs: %j', covArgs);
+      yield this.helper.forkNode(nycCli, covArgs, opt);
+    }
   }
 
   /**
@@ -102,7 +129,6 @@ class CovCommand extends Command {
   addExclude(exclude) {
     this[EXCLUDES].add(exclude);
   }
-
   /**
    * get coverage args
    * @param {Object} context - { cwd, argv, ...}
@@ -121,21 +147,28 @@ class CovCommand extends Command {
       this.addExclude('**/*.d.ts');
     }
 
-    // nyc args passthrough
-    const nycArgs = context.argv.nyc;
+    // nyc or c8 args passthrough
+    let passthroughArgs = context.argv.nyc;
+    if (context.argv['c8-report'] || context.argv['c8-report-only']) {
+      passthroughArgs = context.argv.c8;
+      context.argv['c8-report'] = undefined;
+    }
     context.argv.nyc = undefined;
-    if (nycArgs) {
-      covArgs = covArgs.concat(nycArgs.split(' '));
+    context.argv.c8 = undefined;
+    if (passthroughArgs) {
+      covArgs = covArgs.concat(passthroughArgs.split(' '));
     }
-
     for (const exclude of this[EXCLUDES]) {
       covArgs.push('-x');
       covArgs.push(exclude);
     }
-    covArgs.push(require.resolve('mocha/bin/_mocha'));
     const testArgs = yield this.formatTestArgs(context);
     if (!testArgs) return;
-    covArgs = covArgs.concat(testArgs);
+    if (!context.argv['c8-report-only']) {
+      covArgs.push(require.resolve('mocha/bin/_mocha'));
+      covArgs = covArgs.concat(testArgs);
+    }
+    context.argv['c8-report-only'] = undefined;
     return covArgs;
   }
 }

package.json

@@ -25,6 +25,7 @@
     "mocha": "^6.0.2",
     "mz-modules": "^2.1.0",
     "nyc": "^13.3.0",
+    "c8": "^7.11.0",
     "power-assert": "^1.6.1",
     "semver": "^7.3.5",
     "source-map-support": "^0.5.19",

test/fixtures/test-files-c8-report-only/app/assets/index.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8-report-only/app/assets/subdir/home.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8-report-only/app/public/bar.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8-report-only/app/public/subdir/home.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8-report-only/app/view/subdir/home.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8-report-only/config/config.default.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8-report-only/config/config.prod.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8-report-only/config/plugin.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8-report-only/config/proxy.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8-report-only/docs/home.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8-report-only/example/foo.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8-report-only/examples/foo.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8-report-only/ignore/a.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8-report-only/lib/a.js

@@ -0,0 +1,8 @@
+'use strict';
+
+module.exports = condition => {
+  if (condition) {
+    return 'a';
+  }
+  return 'b';
+};

test/fixtures/test-files-c8-report-only/mocks/foo.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8-report-only/mocks_data/foo/foo.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8-report-only/package.json

@@ -0,0 +1,6 @@
+{
+  "name": "test-files",
+  "files": [
+    "lib"
+  ]
+}

test/fixtures/test-files-c8-report-only/test/a.js

@@ -0,0 +1,9 @@
+'use strict';
+
+const a = require('../lib/a');
+
+describe('a.js', () => {
+  it('should success', () => {
+    a(true);
+  });
+});

test/fixtures/test-files-c8-report-only/test/a.test.js

@@ -0,0 +1,15 @@
+'use strict';
+
+const fs = require('fs');
+const a = require('../lib/a');
+
+describe('a.test.js', () => {
+  it('should success', () => {
+    a(true);
+  });
+
+  it('should show tmp', () => {
+    const tmpdir = process.env.TMPDIR;
+    console.log(tmpdir, fs.existsSync(tmpdir));
+  });
+});

test/fixtures/test-files-c8-report-only/test/b/b.test.js

@@ -0,0 +1,5 @@
+'use strict';
+
+describe('b/b.test.js', () => {
+  it('should success', () => {});
+});

test/fixtures/test-files-c8-report-only/test/fail.js

@@ -0,0 +1,7 @@
+'use strict';
+
+describe('fail.js', () => {
+  it('should fail', () => {
+    throw new Error('fail.js throw');
+  });
+});

test/fixtures/test-files-c8-report-only/test/ignore.test.js

@@ -0,0 +1,10 @@
+'use strict';
+
+const assert = require('assert');
+const a = require('../ignore/a');
+
+describe('ignore.test.js', () => {
+  it('should success', () => {
+    assert(a === '');
+  });
+});

test/fixtures/test-files-c8-report-only/test/no-timeouts.test.js

@@ -0,0 +1,7 @@
+'use strict';
+
+describe('no-timeouts.test.js', () => {
+  it('should success', function() {
+    console.log(`timeout: ${this.timeout()}`);
+  });
+});

test/fixtures/test-files-c8-report-only/test/power-assert-fail.js

@@ -0,0 +1,9 @@
+'use strict';
+
+const assert = require('power-assert');
+
+describe('power-assert-fail.js', () => {
+  it('should fail', () => {
+    assert(1 === 2);
+  });
+});

test/fixtures/test-files-c8/app/assets/index.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8/app/assets/subdir/home.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8/app/public/bar.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8/app/public/subdir/home.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8/app/view/subdir/home.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8/config/config.default.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8/config/config.prod.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8/config/plugin.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8/config/proxy.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8/docs/home.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8/example/foo.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8/examples/foo.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8/ignore/a.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8/lib/a.js

@@ -0,0 +1,8 @@
+'use strict';
+
+module.exports = condition => {
+  if (condition) {
+    return 'a';
+  }
+  return 'b';
+};

test/fixtures/test-files-c8/mocks/foo.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8/mocks_data/foo/foo.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = '';

test/fixtures/test-files-c8/package.json

@@ -0,0 +1,6 @@
+{
+  "name": "test-files",
+  "files": [
+    "lib"
+  ]
+}

test/fixtures/test-files-c8/test/a.js

@@ -0,0 +1,9 @@
+'use strict';
+
+const a = require('../lib/a');
+
+describe('a.js', () => {
+  it('should success', () => {
+    a(true);
+  });
+});

test/fixtures/test-files-c8/test/a.test.js

@@ -0,0 +1,15 @@
+'use strict';
+
+const fs = require('fs');
+const a = require('../lib/a');
+
+describe('a.test.js', () => {
+  it('should success', () => {
+    a(true);
+  });
+
+  it('should show tmp', () => {
+    const tmpdir = process.env.TMPDIR;
+    console.log(tmpdir, fs.existsSync(tmpdir));
+  });
+});

test/fixtures/test-files-c8/test/b/b.test.js

@@ -0,0 +1,5 @@
+'use strict';
+
+describe('b/b.test.js', () => {
+  it('should success', () => {});
+});

test/fixtures/test-files-c8/test/fail.js

@@ -0,0 +1,7 @@
+'use strict';
+
+describe('fail.js', () => {
+  it('should fail', () => {
+    throw new Error('fail.js throw');
+  });
+});

test/fixtures/test-files-c8/test/ignore.test.js

@@ -0,0 +1,10 @@
+'use strict';
+
+const assert = require('assert');
+const a = require('../ignore/a');
+
+describe('ignore.test.js', () => {
+  it('should success', () => {
+    assert(a === '');
+  });
+});