Use multi-line code snippets in tests

test/conftest.py

@@ -4,6 +4,7 @@ Various common utilities for testing.
 
 import atexit
 import multiprocessing
+import textwrap
 import os
 import pathlib
 import queue
@@ -73,10 +74,16 @@ class SeleniumWrapper:
         self.driver.execute_script("window.logs = []")
 
     def run(self, code):
+        if isinstance(code, str) and code.startswith('\n'):
+            # we have a multiline string, fix indentation
+            code = textwrap.dedent(code)
         return self.run_js(
             'return pyodide.runPython({!r})'.format(code))
 
     def run_js(self, code):
+        if isinstance(code, str) and code.startswith('\n'):
+            # we have a multiline string, fix indentation
+            code = textwrap.dedent(code)
         catch = f"""
             Error.stackTraceLimit = Infinity;
             try {{ {code} }}

test/test_python.py

@@ -43,16 +43,21 @@ def test_python2js(selenium):
         '(x.length === 5) && '
         '(x[0] === 98)')
     assert selenium.run_js(
-        'let x = pyodide.runPython("[1, 2, 3]");\n'
+        """
-        'return (x instanceof window.Array) && (x.length === 3) && '
+        let x = pyodide.runPython("[1, 2, 3]");
-        '(x[0] == 1) && (x[1] == 2) && (x[2] == 3)')
+        return ((x instanceof window.Array) && (x.length === 3) &&
+                (x[0] == 1) && (x[1] == 2) && (x[2] == 3))
+        """)
     assert selenium.run_js(
-        'let x = pyodide.runPython("{42: 64}");\n'
+        """
-        'return (typeof x === "object") && '
+        let x = pyodide.runPython("{42: 64}");
-        '(x[42] === 64)')
+        return (typeof x === "object") && (x[42] === 64)
+        """)
     assert selenium.run_js(
-        'let x = pyodide.runPython("open(\'/foo.txt\', \'wb\')")\n'
+        """
-        'return (x.tell() === 0)\n')
+        let x = pyodide.runPython("open('/foo.txt', 'wb')")
+        return (x.tell() === 0)
+        """)
 
 
 def test_pythonexc2js(selenium):
@@ -66,17 +71,19 @@ def test_pythonexc2js(selenium):
 
 def test_js2python(selenium):
     selenium.run_js(
-        'window.jsstring = "碘化物";\n'
+        """
-        'window.jsnumber0 = 42;\n'
+        window.jsstring = "碘化物";
-        'window.jsnumber1 = 42.5;\n'
+        window.jsnumber0 = 42;
-        'window.jsundefined = undefined;\n'
+        window.jsnumber1 = 42.5;
-        'window.jsnull = null;\n'
+        window.jsundefined = undefined;
-        'window.jstrue = true;\n'
+        window.jsnull = null;
-        'window.jsfalse = false;\n'
+        window.jstrue = true;
-        'window.jspython = pyodide.pyimport("open");\n'
+        window.jsfalse = false;
-        'window.jsbytes = new Uint8Array([1, 2, 3]);\n'
+        window.jspython = pyodide.pyimport("open");
-        'window.jsfloats = new Float32Array([1, 2, 3]);\n'
+        window.jsbytes = new Uint8Array([1, 2, 3]);
-        'window.jsobject = new XMLHttpRequest();\n'
+        window.jsfloats = new Float32Array([1, 2, 3]);
+        window.jsobject = new XMLHttpRequest();
+        """
     )
     assert selenium.run(
         'from js import jsstring\n'
@@ -100,23 +107,27 @@ def test_js2python(selenium):
         'from js import jspython\n'
         'jspython is open')
     assert selenium.run(
-        'from js import jsbytes\n'
+        """
-        '(jsbytes.tolist() == [1, 2, 3]) '
+        from js import jsbytes
-        'and (jsbytes.tobytes() == b"\x01\x02\x03")')
+        ((jsbytes.tolist() == [1, 2, 3])
+         and (jsbytes.tobytes() == b"\x01\x02\x03"))
+        """)
     assert selenium.run(
-        'from js import jsfloats\n'
+        """
-        'import struct\n'
+        from js import jsfloats
-        'expected = struct.pack("fff", 1, 2, 3)\n'
+        import struct
-        '(jsfloats.tolist() == [1, 2, 3]) '
+        expected = struct.pack("fff", 1, 2, 3)
-        'and (jsfloats.tobytes() == expected)')
+        (jsfloats.tolist() == [1, 2, 3]) and (jsfloats.tobytes() == expected)
+        """)
     assert selenium.run(
         'from js import jsobject\n'
         'str(jsobject) == "[object XMLHttpRequest]"')
 
 
-def test_typed_arrays(selenium):
+@pytest.mark.parametrize('wasm_heap', (False, True))
-    for wasm_heap in (False, True):
+@pytest.mark.parametrize(
-        for (jstype, pytype) in (
+        'jstype, pytype',
+        (
          ('Int8Array', 'b'),
          ('Uint8Array', 'B'),
          ('Uint8ClampedArray', 'B'),
@@ -125,45 +136,55 @@ def test_typed_arrays(selenium):
          ('Int32Array', 'i'),
          ('Uint32Array', 'I'),
          ('Float32Array', 'f'),
-                ('Float64Array', 'd')):
+         ('Float64Array', 'd')))
-            print(wasm_heap, jstype, pytype)
+def test_typed_arrays(selenium, wasm_heap, jstype, pytype):
     if not wasm_heap:
         selenium.run_js(
             f'window.array = new {jstype}([1, 2, 3, 4]);\n')
     else:
         selenium.run_js(
-                    'var buffer = pyodide._malloc('
+            f"""
-                    f'4 * {jstype}.BYTES_PER_ELEMENT);\n'
+             var buffer = pyodide._malloc(
-                    f'window.array = new {jstype}('
+                   4 * {jstype}.BYTES_PER_ELEMENT);
-                    'pyodide.HEAPU8.buffer, buffer, 4);\n'
+             window.array = new {jstype}(
-                    'window.array[0] = 1;\n'
+                   pyodide.HEAPU8.buffer, buffer, 4);
-                    'window.array[1] = 2;\n'
+             window.array[0] = 1;
-                    'window.array[2] = 3;\n'
+             window.array[1] = 2;
-                    'window.array[3] = 4;\n')
+             window.array[2] = 3;
+             window.array[3] = 4;
+             """)
     assert selenium.run(
-                'from js import array\n'
+        f"""
-                'import struct\n'
+         from js import array
-                f'expected = struct.pack("{pytype*4}", 1, 2, 3, 4)\n'
+         import struct
-                'print(array.format, array.tolist(), array.tobytes())\n'
+         expected = struct.pack("{pytype*4}", 1, 2, 3, 4)
-                f'array.format == "{pytype}" '
+         print(array.format, array.tolist(), array.tobytes())
-                'and array.tolist() == [1, 2, 3, 4] '
+         ((array.format == "{pytype}")
-                'and array.tobytes() == expected '
+          and array.tolist() == [1, 2, 3, 4]
-                f'and array.obj._has_bytes() is {not wasm_heap}')
+          and array.tobytes() == expected
+          and array.obj._has_bytes() is {not wasm_heap})
+         """)
 
 
 def test_import_js(selenium):
     result = selenium.run(
-        "from js import window\nwindow.title = 'Foo'\nwindow.title")
+        """
+        from js import window
+        window.title = 'Foo'
+        window.title
+        """)
     assert result == 'Foo'
 
 
 def test_pyproxy(selenium):
     selenium.run(
-        "class Foo:\n"
+        """
-        "  bar = 42\n"
+        class Foo:
-        "  def get_value(self, value):\n"
+          bar = 42
-        "    return value * 64\n"
+          def get_value(self, value):
-        "f = Foo()\n"
+            return value * 64
+        f = Foo()
+        """
     )
     assert selenium.run_js("return pyodide.pyimport('f').get_value(2)") == 128
     assert selenium.run_js("return pyodide.pyimport('f').bar") == 42
@@ -188,18 +209,22 @@ def test_pyproxy(selenium):
 
 def test_pyproxy_destroy(selenium):
     selenium.run(
-        "class Foo:\n"
+        """
-        "  bar = 42\n"
+        class Foo:
-        "  def get_value(self, value):\n"
+          bar = 42
-        "    return value * 64\n"
+          def get_value(self, value):
-        "f = Foo()\n"
+            return value * 64
+        f = Foo()
+        """
     )
     try:
         selenium.run_js(
-            "let f = pyodide.pyimport('f');\n"
+            """
-            "console.assert(f.get_value(1) === 64);\n"
+            let f = pyodide.pyimport('f');
-            "f.destroy();\n"
+            console.assert(f.get_value(1) === 64);
-            "f.get_value();\n")
+            f.destroy();
+            f.get_value();
+            """)
     except selenium.JavascriptException as e:
         assert 'Object has already been destroyed' in str(e)
     else:
@@ -208,10 +233,11 @@ def test_pyproxy_destroy(selenium):
 
 def test_jsproxy(selenium):
     assert selenium.run(
-        "from js import document\n"
+        """
-        "el = document.createElement('div')\n"
+        from js import document
-        "document.body.appendChild(el)\n"
+        el = document.createElement('div')
-        "document.body.children.length\n"
+        document.body.appendChild(el)
+        document.body.children.length"""
         ) == 1
     assert selenium.run(
         "document.body.children[0].tagName") == 'DIV'
@@ -229,50 +255,59 @@ def test_jsproxy(selenium):
         "from js import ImageData\n"
         "ImageData.typeof") == 'function'
     selenium.run_js(
-        "class Point {\n"
+        """
-        "  constructor(x, y) {\n"
+        class Point {
-        "    this.x = x;\n"
+          constructor(x, y) {
-        "    this.y = y;\n"
+            this.x = x;
-        "  }\n"
+            this.y = y;
-        "}\n"
+          }
-        "window.TEST = new Point(42, 43);")
+        }
+        window.TEST = new Point(42, 43);""")
     assert selenium.run(
-        "from js import TEST\n"
+        """
-        "del TEST.y\n"
+        from js import TEST
-        "TEST.y\n") is None
+        del TEST.y
+        TEST.y""") is None
     selenium.run_js(
-        "class Point {\n"
+        """
-        "  constructor(x, y) {\n"
+        class Point {
-        "    this.x = x;\n"
+          constructor(x, y) {
-        "    this.y = y;\n"
+            this.x = x;
-        "  }\n"
+            this.y = y;
-        "}\n"
+          }
-        "window.TEST = new Point(42, 43);")
+        }
+        window.TEST = new Point(42, 43);""")
     assert selenium.run(
-        "from js import TEST\n"
+        """
-        "del TEST['y']\n"
+        from js import TEST
-        "TEST['y']\n") is None
+        del TEST['y']
+        TEST['y']""") is None
     assert selenium.run(
-        "from js import TEST\n"
+        """
-        "TEST == TEST\n")
+        from js import TEST
+        TEST == TEST
+        """)
     assert selenium.run(
-        "from js import TEST\n"
+        """
-        "TEST != 'foo'\n")
+        from js import TEST
+        TEST != 'foo'
+        """)
 
 
 def test_jsproxy_iter(selenium):
     selenium.run_js(
-        "function makeIterator(array) {\n"
+        """
-        "  var nextIndex = 0;\n"
+        function makeIterator(array) {
-        "  return {\n"
+          var nextIndex = 0;
-        "    next: function() {\n"
+          return {
-        "      return nextIndex < array.length ?\n"
+            next: function() {
-        "        {value: array[nextIndex++], done: false} :\n"
+              return nextIndex < array.length ?
-        "        {done: true};\n"
+                {value: array[nextIndex++], done: false} :
-        "    }\n"
+                {done: true};
-        "  };\n"
+            }
-        "}\n"
+          };
-        "window.ITER = makeIterator([1, 2, 3]);")
+        }
+        window.ITER = makeIterator([1, 2, 3]);""")
     assert selenium.run(
         "from js import ITER\n"
         "list(ITER)") == [1, 2, 3]
@@ -280,8 +315,10 @@ def test_jsproxy_iter(selenium):
 
 def test_open_url(selenium):
     assert selenium.run(
-        "import pyodide\n"
+        """
-        "pyodide.open_url('test_data.txt').read()\n") == 'HELLO\n'
+        import pyodide
+        pyodide.open_url('test_data.txt').read()
+        """) == 'HELLO\n'
 
 
 def test_run_core_python_test(python_test, selenium, request):
@@ -296,13 +333,14 @@ def test_run_core_python_test(python_test, selenium, request):
     selenium.load_package('test')
     try:
         selenium.run(
-            "from test.libregrtest import main\n"
+            """
-            "try:\n"
+            from test.libregrtest import main
-            "    main(['{}'], verbose=True, verbose3=True)\n"
+            try:
-            "except SystemExit as e:\n"
+                main(['{}'], verbose=True, verbose3=True)
-            "    if e.code != 0:\n"
+            except SystemExit as e:
-            "        raise RuntimeError(f'Failed with code: {{e.code}}')\n"
+                if e.code != 0:
-            .format(name))
+                    raise RuntimeError(f'Failed with code: {{e.code}}')
+            """.format(name))
     except selenium.JavascriptException as e:
         print(selenium.logs)
         raise

test/test_testing.py

@@ -1,12 +1,17 @@
 def test_pytest(selenium):
-    selenium.load_package('pytest')
+    selenium.load_package(['pytest', 'numpy', 'nose'])
-    selenium.load_package('numpy')
+
-    selenium.load_package('nose')
+    selenium.run(
-    selenium.run('from pathlib import Path')
+        """
-    selenium.run('import os')
+        from pathlib import Path
-    selenium.run('import numpy')
+        import os
-    selenium.run('base_dir = Path(numpy.__file__).parent / "core" / "tests"')
+        import numpy
-    selenium.run("import pytest;"
+        import pytest
-                 "pytest.main([base_dir / 'test_api.py'])")
+
+        base_dir = Path(numpy.__file__).parent / "core" / "tests"
+        """)
+
+    selenium.run("pytest.main([base_dir / 'test_api.py'])")
+
     logs = '\n'.join(selenium.logs)
     assert 'INTERNALERROR' not in logs