Make sure to actually use yarn to install the main-packages, otherwise the packages.json#resolutions property will not be used and @babel/helpers would not get overruled

Overruled @babel/helpers to fix how initializers play with decorated properties. Thus circumventing the imperformant and lengthy code being generated by babel in the non-legacy option.

packages/babel-helpers/test/fixtures/dependencies/basic/input.js

@@ -0,0 +1 @@
+REPLACE_ME;

packages/babel-helpers/test/fixtures/dependencies/basic/options.json

@@ -0,0 +1,3 @@
+{
+  "plugins": ["./plugin"]
+}

packages/babel-helpers/test/fixtures/dependencies/basic/output.js

@@ -0,0 +1,5 @@
+function _$_basic_main() { return _$_basic_dependency(); }
+
+function _$_basic_dependency() {}
+
+_$_basic_main;

packages/babel-helpers/test/fixtures/dependencies/basic/plugin.js

@@ -0,0 +1,25 @@
+const defineHelper = require("../../../helpers/define-helper").default;
+
+const dependency = defineHelper(__dirname, "dependency", `
+  export default function fn() {}
+`);
+
+const main = defineHelper(__dirname, "main", `
+  import dep from "${dependency}";
+
+  export default function helper() {
+    return dep();
+  }
+`);
+
+module.exports = function() {
+  return {
+    visitor: {
+      Identifier(path) {
+        if (path.node.name !== "REPLACE_ME") return;
+        const helper = this.addHelper(main);
+        path.replaceWith(helper);
+      },
+    },
+  };
+};

packages/babel-helpers/test/fixtures/dependencies/deep/input.js

@@ -0,0 +1 @@
+REPLACE_ME;

packages/babel-helpers/test/fixtures/dependencies/deep/options.json

@@ -0,0 +1,3 @@
+{
+  "plugins": ["./plugin"]
+}

packages/babel-helpers/test/fixtures/dependencies/deep/output.js

@@ -0,0 +1,7 @@
+function _$_deep_main() { return _$_deep_dependency(); }
+
+function _$_deep_dependency() { return _$_deep_dependencyDeep; }
+
+function _$_deep_dependencyDeep() {}
+
+_$_deep_main;

packages/babel-helpers/test/fixtures/dependencies/deep/plugin.js

@@ -0,0 +1,30 @@
+const defineHelper = require("../../../helpers/define-helper").default;
+
+const dependencyDeep = defineHelper(__dirname, "dependencyDeep", `
+  export default function fn() {}
+`)
+
+const dependency = defineHelper(__dirname, "dependency", `
+  import f from "${dependencyDeep}";
+  export default function fn() { return f; }
+`);
+
+const main = defineHelper(__dirname, "main", `
+  import dep from "${dependency}";
+
+  export default function helper() {
+    return dep();
+  }
+`);
+
+module.exports = function() {
+  return {
+    visitor: {
+      Identifier(path) {
+        if (path.node.name !== "REPLACE_ME") return;
+        const helper = this.addHelper(main);
+        path.replaceWith(helper);
+      },
+    },
+  };
+};

packages/babel-helpers/test/fixtures/dependencies/missing/input.js

@@ -0,0 +1 @@
+REPLACE_ME;

packages/babel-helpers/test/fixtures/dependencies/missing/options.json

@@ -0,0 +1,4 @@
+{
+  "plugins": ["./plugin"],
+  "throws": " "
+}

packages/babel-helpers/test/fixtures/dependencies/missing/plugin.js

@@ -0,0 +1,21 @@
+const defineHelper = require("../../../helpers/define-helper").default;
+
+const main = defineHelper(__dirname, "main", `
+  import dep from "(!!!)%-..a,4892 missing";
+
+  export default function helper() {
+    return dep();
+  }
+`);
+
+module.exports = function() {
+  return {
+    visitor: {
+      Identifier(path) {
+        if (path.node.name !== "REPLACE_ME") return;
+        const helper = this.addHelper(main);
+        path.replaceWith(helper);
+      },
+    },
+  };
+};

packages/babel-helpers/test/fixtures/dependencies/multiple/input.js

@@ -0,0 +1 @@
+REPLACE_ME;

packages/babel-helpers/test/fixtures/dependencies/multiple/options.json

@@ -0,0 +1,3 @@
+{
+  "plugins": ["./plugin"]
+}

packages/babel-helpers/test/fixtures/dependencies/multiple/output.js

@@ -0,0 +1,7 @@
+function _$_multiple_main() { return _$_multiple_dependency() + _$_multiple_dependency2(); }
+
+function _$_multiple_dependency2() { 1; }
+
+function _$_multiple_dependency() { 0; }
+
+_$_multiple_main;

packages/babel-helpers/test/fixtures/dependencies/multiple/plugin.js

@@ -0,0 +1,30 @@
+const defineHelper = require("../../../helpers/define-helper").default;
+
+const dependency1 = defineHelper(__dirname, "dependency1", `
+  export default function fn() { 0; }
+`);
+
+const dependency2 = defineHelper(__dirname, "dependency2", `
+  export default function fn() { 1; }
+`);
+
+const main = defineHelper(__dirname, "main", `
+  import dep1 from "${dependency1}";
+  import dep2 from "${dependency2}";
+
+  export default function helper() {
+    return dep1() + dep2();
+  }
+`);
+
+module.exports = function() {
+  return {
+    visitor: {
+      Identifier(path) {
+        if (path.node.name !== "REPLACE_ME") return;
+        const helper = this.addHelper(main);
+        path.replaceWith(helper);
+      },
+    },
+  };
+};

packages/babel-helpers/test/fixtures/dependencies/rename-binding-equal/input.js

@@ -0,0 +1 @@
+REPLACE_ME;

packages/babel-helpers/test/fixtures/dependencies/rename-binding-equal/options.json

@@ -0,0 +1,3 @@
+{
+  "plugins": ["./plugin"]
+}

packages/babel-helpers/test/fixtures/dependencies/rename-binding-equal/output.js

@@ -0,0 +1,9 @@
+let _foo = "main";
+
+function _$_renameBindingEqual_main() { return _$_renameBindingEqual_dependency() + _foo; }
+
+let foo = "dependency";
+
+function _$_renameBindingEqual_dependency() { return foo; }
+
+_$_renameBindingEqual_main;

packages/babel-helpers/test/fixtures/dependencies/rename-binding-equal/plugin.js

@@ -0,0 +1,28 @@
+const defineHelper = require("../../../helpers/define-helper").default;
+
+const dependency = defineHelper(__dirname, "dependency", `
+  let foo = "dependency";
+  export default function fn() { return foo }
+`);
+
+const main = defineHelper(__dirname, "main", `
+  import dep from "${dependency}";
+
+  let foo = "main";
+
+  export default function helper() {
+    return dep() + foo;
+  }
+`);
+
+module.exports = function() {
+  return {
+    visitor: {
+      Identifier(path) {
+        if (path.node.name !== "REPLACE_ME") return;
+        const helper = this.addHelper(main);
+        path.replaceWith(helper);
+      },
+    },
+  };
+};

packages/babel-helpers/test/fixtures/dependencies/rename-deep-global/input.js

@@ -0,0 +1,3 @@
+REPLACE_ME;
+
+let Promise = "I will be a good guy!";

packages/babel-helpers/test/fixtures/dependencies/rename-deep-global/options.json

@@ -0,0 +1,3 @@
+{
+  "plugins": ["./plugin"]
+}

packages/babel-helpers/test/fixtures/dependencies/rename-deep-global/output.js

@@ -0,0 +1,6 @@
+function _$_renameDeepGlobal_main() { return _$_renameDeepGlobal_dependency() || Promise; }
+
+function _$_renameDeepGlobal_dependency() { return Promise; }
+
+_$_renameDeepGlobal_main;
+let _Promise = "I will be a good guy!";

packages/babel-helpers/test/fixtures/dependencies/rename-deep-global/plugin.js

@@ -0,0 +1,27 @@
+const defineHelper = require("../../../helpers/define-helper").default;
+
+const dependency = defineHelper(__dirname, "dependency", `
+  export default function fn() {
+    return Promise;
+  }
+`);
+
+const main = defineHelper(__dirname, "main", `
+  import dep from "${dependency}";
+
+  export default function helper() {
+    return dep() || Promise;
+  }
+`);
+
+module.exports = function() {
+  return {
+    visitor: {
+      Identifier(path) {
+        if (path.node.name !== "REPLACE_ME") return;
+        const helper = this.addHelper(main);
+        path.replaceWith(helper);
+      },
+    },
+  };
+};

packages/babel-helpers/test/fixtures/dependencies/reuse-dependency/input.js

@@ -0,0 +1,2 @@
+REPLACE_ME_1;
+REPLACE_ME_2;

packages/babel-helpers/test/fixtures/dependencies/reuse-dependency/options.json

@@ -0,0 +1,3 @@
+{
+  "plugins": ["./plugin"]
+}

packages/babel-helpers/test/fixtures/dependencies/reuse-dependency/output.js

@@ -0,0 +1,6 @@
+function _$_reuseDependency_main() { return _$_reuseDependency_dependency(); }
+
+function _$_reuseDependency_dependency() { 0; }
+
+_$_reuseDependency_main;
+_$_reuseDependency_dependency;

packages/babel-helpers/test/fixtures/dependencies/reuse-dependency/plugin.js

@@ -0,0 +1,29 @@
+const defineHelper = require("../../../helpers/define-helper").default;
+
+const dependency = defineHelper(__dirname, "dependency", `
+  export default function fn() { 0; }
+`);
+
+const main = defineHelper(__dirname, "main", `
+  import dep from "${dependency}";
+
+  export default function helper() {
+    return dep();
+  }
+`);
+
+module.exports = function() {
+  return {
+    visitor: {
+      Identifier(path) {
+        if (path.node.name === "REPLACE_ME_1") {
+          const mainHelper = this.addHelper(main);
+          path.replaceWith(mainHelper);
+        } else if (path.node.name === "REPLACE_ME_2") {
+          const dependencyHelper = this.addHelper(dependency);
+          path.replaceWith(dependencyHelper);
+        }
+      },
+    },
+  };
+};

packages/babel-helpers/test/fixtures/dependencies/variable-same-name-dependency/input.js

@@ -0,0 +1 @@
+REPLACE_ME;

packages/babel-helpers/test/fixtures/dependencies/variable-same-name-dependency/options.json

@@ -0,0 +1,3 @@
+{
+  "plugins": ["./plugin"]
+}

packages/babel-helpers/test/fixtures/dependencies/variable-same-name-dependency/output.js

@@ -0,0 +1,5 @@
+function _$_variableSameNameDependency_main() { let x = _$_variableSameNameDependency_dependency; return function (dep) { return x() + dep; }; }
+
+function _$_variableSameNameDependency_dependency() {}
+
+_$_variableSameNameDependency_main;

packages/babel-helpers/test/fixtures/dependencies/variable-same-name-dependency/plugin.js

@@ -0,0 +1,28 @@
+const defineHelper = require("../../../helpers/define-helper").default;
+
+const dependency = defineHelper(__dirname, "dependency", `
+  export default function fn() {}
+`);
+
+const main = defineHelper(__dirname, "main", `
+  import dep from "${dependency}";
+
+  export default function helper() {
+    let x = dep;
+    return function (dep) {
+      return x() + dep;
+    }
+  }
+`);
+
+module.exports = function() {
+  return {
+    visitor: {
+      Identifier(path) {
+        if (path.node.name !== "REPLACE_ME") return;
+        const helper = this.addHelper(main);
+        path.replaceWith(helper);
+      },
+    },
+  };
+};

packages/babel-helpers/test/helpers/define-helper.js

@@ -0,0 +1,26 @@
+import path from "path";
+import template from "@babel/template";
+import helpers from "../../lib/helpers";
+
+function getHelperId(dir, name) {
+  const testName = path.basename(dir);
+  return `_$_${testName}_${name}`;
+}
+
+export default function defineHelper(
+  dir: string,
+  name: string,
+  code: string,
+): string {
+  const id = getHelperId(dir, name);
+  if (id in helpers) {
+    throw new Error(`The ${id} helper is already defined.`);
+  }
+  Object.defineProperty(helpers, id, {
+    value: {
+      minVersion: "7.0.0-beta.0",
+      ast: template.program(code),
+    },
+  });
+  return id;
+}

packages/babel-helpers/test/index.js

@@ -0,0 +1,3 @@
+import runner from "@babel/helper-plugin-test-runner";
+
+runner(__dirname);