Add basic tests

Author: samwillis

.gitignore

@@ -1,3 +1,5 @@
 /dist
 .DS_Store
-env*/
+env*/
+__pycache__/
+*.py[cod]

tests/test_node.py

@@ -0,0 +1,59 @@
+"Test nodejs.node"
+
+import os
+
+
+THIS_DIR = os.path.dirname(os.path.abspath(__file__))
+
+
+def test_package_installed():
+    import nodejs
+    assert nodejs.__version__ is not None
+
+
+def test_runs():
+    from nodejs import node
+    assert node.run(['--version']) is 0
+
+
+def test_version(capfd):
+    from nodejs import node, node_version
+    node.run(['--version'])
+    out, err = capfd.readouterr()
+    assert out.startswith('v')
+    assert out.strip() == f'v{node_version}'
+
+
+def test_eval(capfd):
+    from nodejs import node
+    node.run(['--eval', 'console.log("hello")'])
+    out, err = capfd.readouterr()
+    assert out.strip() == 'hello'
+
+
+def test_eval_error(capfd):
+    from nodejs import node
+    node.run(['--eval', 'console.error("error")'])
+    out, err = capfd.readouterr()
+    assert err.strip() == 'error'
+
+
+def test_eval_error_exit():
+    from nodejs import node
+    ret = node.run(['--eval', 'process.exit(1)'])
+    assert ret == 1
+
+
+def test_script(capfd):
+    from nodejs import node
+    node.run([os.path.join(THIS_DIR, 'test_node', 'test_script.js')])
+    out, err = capfd.readouterr()
+    assert out.strip() == 'hello'
+
+
+def test_args(capfd):
+    from nodejs import node
+    node.run([os.path.join(THIS_DIR, 'test_node', 'test_args.js'), 'hello'])
+    out, err = capfd.readouterr()
+    assert out.strip() == 'hello'
+

tests/test_node/test_args.js

@@ -0,0 +1 @@
+console.log(process.argv[2]);

tests/test_node/test_script.js

@@ -0,0 +1 @@
+console.log('hello');

tests/test_npm.py

@@ -0,0 +1,33 @@
+"Test nodejs.npm"
+
+import os
+from re import A
+
+
+def test_runs():
+    from nodejs import npm
+    assert npm.run(['--version']) is 0
+
+
+def test_version(capfd):
+    from nodejs import npm
+    npm.run(['--version'])
+    out, err = capfd.readouterr()
+    assert isinstance(out, str)
+
+
+def test_install_package(tmp_path, capfd):
+    from nodejs import npm, node
+    import json
+    os.chdir(tmp_path)
+    npm.run(['init', '-y'])
+    assert (tmp_path / 'package.json').exists()
+    npm.run(['install', 'is-even'])
+    assert (tmp_path / 'node_modules' / 'is-even').exists()
+    out, err = capfd.readouterr()
+    node.run(['--eval', 'console.log(require("is-even")(42))'])
+    out, err = capfd.readouterr()
+    assert out.strip() == 'true'
+    node.run(['--eval', 'console.log(require("is-even")(43))'])
+    out, err = capfd.readouterr()
+    assert out.strip() == 'false'