From 370a70122789570f80290e6b3ef7683cf00d9b5a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Iv=C3=A1n=20Reinoso=20Garc=C3=ADa?=
 <ivan.reinoso@outlook.es>
Date: Sun, 9 Aug 2020 03:19:04 +0200
Subject: [PATCH] feat(testing): add collectCoverageFrom jest parameter (#2613)

---
 src/testing/jest/jest-config.ts           |  3 +++
 src/testing/jest/test/jest-config.spec.ts | 16 ++++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/src/testing/jest/jest-config.ts b/src/testing/jest/jest-config.ts
index 22b3de82d45..4bcad489ee8 100644
--- a/src/testing/jest/jest-config.ts
+++ b/src/testing/jest/jest-config.ts
@@ -55,6 +55,9 @@ export function buildJestConfig(config: d.Config) {
   if (isString(stencilConfigTesting.collectCoverage)) {
     jestConfig.collectCoverage = stencilConfigTesting.collectCoverage;
   }
+  if (Array.isArray(stencilConfigTesting.collectCoverageFrom)) {
+    jestConfig.collectCoverageFrom = stencilConfigTesting.collectCoverageFrom;
+  }
   if (isString(stencilConfigTesting.coverageDirectory)) {
     jestConfig.coverageDirectory = stencilConfigTesting.coverageDirectory;
   }
diff --git a/src/testing/jest/test/jest-config.spec.ts b/src/testing/jest/test/jest-config.spec.ts
index 6b9a18b6f56..ee65d6d6aa4 100644
--- a/src/testing/jest/test/jest-config.spec.ts
+++ b/src/testing/jest/test/jest-config.spec.ts
@@ -132,4 +132,20 @@ describe('jest-config', () => {
     const parsedConfig = JSON.parse(jestArgv.config) as d.JestConfig;
     expect(parsedConfig.rootDir).toBe(rootDir);
   });
+
+  it('set jestArgv config collectCoverageFrom', () => {
+    const rootDir = path.resolve('/');
+    const args = ['test'];
+    const config = mockConfig();
+    config.rootDir = rootDir;
+    config.flags = parseFlags(args, config.sys);
+    config.testing = {
+      collectCoverageFrom: ['**/*.+(ts|tsx)'],
+    };
+
+    const jestArgv = buildJestArgv(config);
+    const parsedConfig = JSON.parse(jestArgv.config) as d.JestConfig;
+    expect(parsedConfig.collectCoverageFrom).toHaveLength(1);
+    expect(parsedConfig.collectCoverageFrom[0]).toBe('**/*.+(ts|tsx)');
+  });
 });