add es2015 test cases

packages/babel-plugin-proposal-decorators/test/fixtures/2021-12-ordering--to-es2015/decorators/exec.js

@@ -0,0 +1,31 @@
+var log = [];
+
+function push(x) { log.push(x); return x; }
+
+function logDecoratorRun(a, b) {
+  push(a);
+  return function (el) { push(b); return el; };
+}
+
+@logDecoratorRun(0, 19)
+@logDecoratorRun(1, 18)
+class A {
+  @logDecoratorRun(2, 11)
+  @logDecoratorRun(3, 10)
+  a;
+
+  @logDecoratorRun(4, 13)
+  @logDecoratorRun(5, 12)
+  static b;
+
+  @logDecoratorRun(6, 15)
+  @logDecoratorRun(7, 14)
+  static #c;
+
+  @logDecoratorRun(8, 17)
+  @logDecoratorRun(9, 16)
+  #d;
+}
+
+var nums = Array.from({ length: 20 }, (_, i) => i);
+expect(log).toEqual(nums);

packages/babel-plugin-proposal-decorators/test/fixtures/2021-12-ordering--to-es2015/field-initializers-after-methods/exec.js

@@ -0,0 +1,27 @@
+var counter = 0;
+
+@(x => x)
+class A {
+  foo = (() => {
+    counter++;
+    expect(typeof this.method).toBe("function");
+    expect(this.foo).toBeUndefined();
+    expect(this.bar).toBeUndefined();
+    return "foo";
+  })();
+
+  method() {}
+
+  bar = (() => {
+    counter++;
+    expect(typeof this.method).toBe("function");
+    expect(this.foo).toBe("foo");
+    expect(this.bar).toBeUndefined();
+  })();
+}
+
+expect(counter).toBe(0);
+
+new A();
+
+expect(counter).toBe(2);

packages/babel-plugin-proposal-decorators/test/fixtures/2021-12-ordering--to-es2015/options.json

@@ -0,0 +1,8 @@
+{
+  "plugins": [
+    ["proposal-decorators", { "version": "2021-12" }],
+    "proposal-class-properties",
+    "proposal-private-methods",
+    "proposal-class-static-block"
+  ]
+}

packages/babel-plugin-proposal-decorators/test/fixtures/2021-12-ordering--to-es2015/static-field-initializers-after-methods/exec.js

@@ -0,0 +1,23 @@
+var counter = 0;
+
+@(x => x)
+class A {
+  static foo = (() => {
+    counter++;
+    expect(typeof this.method).toBe("function");
+    expect(this.foo).toBeUndefined();
+    expect(this.bar).toBeUndefined();
+    return "foo";
+  })();
+
+  static method() {}
+
+  static bar = (() => {
+    counter++;
+    expect(typeof this.method).toBe("function");
+    expect(this.foo).toBe("foo");
+    expect(this.bar).toBeUndefined();
+  })();
+}
+
+expect(counter).toBe(2);

packages/babel-plugin-proposal-decorators/test/fixtures/2021-12-ordering/options.json

@@ -1,3 +1,4 @@
 {
-  "plugins": [["proposal-decorators", { "version": "2021-12" }]]
+  "plugins": [["proposal-decorators", { "version": "2021-12" }]],
+  "minNodeVersion": "16.11.0"
 }