Treat platforms and allow as a list

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

__tests__/context.test.ts

@@ -0,0 +1,60 @@
+import * as context from '../src/context';
+
+describe('getInputList', () => {
+  it('handles single line correctly', async () => {
+    await setInput('foo', 'bar');
+    const res = await context.getInputList('foo');
+    console.log(res);
+    expect(res).toEqual(['bar']);
+  });
+
+  it('handles multiple lines correctly', async () => {
+    setInput('foo', 'bar\nbaz');
+    const res = await context.getInputList('foo');
+    console.log(res);
+    expect(res).toEqual(['bar', 'baz']);
+  });
+
+  it('handles comma correctly', async () => {
+    setInput('foo', 'bar,baz');
+    const res = await context.getInputList('foo');
+    console.log(res);
+    expect(res).toEqual(['bar', 'baz']);
+  });
+
+  it('handles different new lines correctly', async () => {
+    setInput('foo', 'bar\r\nbaz');
+    const res = await context.getInputList('foo');
+    console.log(res);
+    expect(res).toEqual(['bar', 'baz']);
+  });
+
+  it('handles different new lines and comma correctly', async () => {
+    setInput('foo', 'bar\r\nbaz,bat');
+    const res = await context.getInputList('foo');
+    console.log(res);
+    expect(res).toEqual(['bar', 'baz', 'bat']);
+  });
+});
+
+describe('asyncForEach', () => {
+  it('executes async tasks sequentially', async () => {
+    const testValues = [1, 2, 3, 4, 5];
+    const results: number[] = [];
+
+    await context.asyncForEach(testValues, async value => {
+      results.push(value);
+    });
+
+    expect(results).toEqual(testValues);
+  });
+});
+
+// See: https://github.com/actions/toolkit/blob/master/packages/core/src/core.ts#L67
+function getInputName(name: string): string {
+  return `INPUT_${name.replace(/ /g, '_').toUpperCase()}`;
+}
+
+function setInput(name: string, value: string): void {
+  process.env[getInputName(name)] = value;
+}