Merge pull request #25 from tuanthanh2067/add-e2e-test

Added e2e test

test/__snapshots__/e2e.test.js.snap

@@ -0,0 +1,16 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`end-to-end integration prints help message when --help option is passed 1`] = `
+"Usage: index.js --input <filename>  [-s <css-link>] [-l <lang-code>]
+
+Options:
+  -i, --input       .txt or .md file name                                [array]
+  -c, --config      configuration file                     [array] [default: \\"\\"]
+  -a, --assets      path to assets folder                  [array] [default: \\"\\"]
+  -s, --stylesheet  css link                                            [string]
+  -l, --lang        language used in HTML                               [string]
+  -v, --version     Show version number                                [boolean]
+  -h, --help        Show help                                          [boolean]"
+`;
+
+exports[`end-to-end integration prints version when --version option is passed 1`] = `"ssg-cli 1.0.0"`;

test/e2e.test.js

@@ -0,0 +1,19 @@
+const run = require("./run");
+
+describe("end-to-end integration", () => {
+  test("prints help message when --help option is passed", async () => {
+    const { stderr, stdout, exitCode } = await run("--help");
+
+    expect(exitCode).toBe(0);
+    expect(stdout).toMatchSnapshot();
+    expect(stderr).toEqual("");
+  });
+
+  test("prints version when --version option is passed", async () => {
+    const { stderr, stdout, exitCode } = await run("--version");
+
+    expect(exitCode).toBe(0);
+    expect(stdout).toMatchSnapshot();
+    expect(stderr).toEqual("");
+  });
+});

test/run.js

@@ -0,0 +1,12 @@
+const execa = require("execa");
+
+async function run(...args) {
+  try {
+    const results = await execa.node("./bin/index.js", args);
+    return results;
+  } catch (err) {
+    return err;
+  }
+}
+
+module.exports = run;