0.2.0 - Mid migration

web/node_modules/@webassemblyjs/helper-module-context/test/index.js

@@ -0,0 +1,100 @@
+const { assert } = require("chai");
+const { parse } = require("@webassemblyjs/wast-parser");
+
+const { moduleContextFromModuleAST } = require("../lib");
+
+const contextFromWast = wast => moduleContextFromModuleAST(parse(wast).body[0]);
+
+describe("module context", () => {
+  describe("start segment", () => {
+    it("should return the start function offset", () => {
+      const context = contextFromWast(`
+        (module
+          (func)
+          (func)
+          (start 1)
+        )
+      `);
+
+      assert.isOk(context.getStart());
+      assert.typeOf(context.getStart(), "number");
+      assert.equal(context.getStart(), 1);
+    });
+
+    it("should return null if no start function", () => {
+      const context = contextFromWast(`
+        (module (func))
+      `);
+
+      assert.isNull(context.getStart());
+    });
+
+    it("should retrive the type of implemented functions", () => {
+      const context = contextFromWast(`
+        (module
+          (func (param i32) (result i64))
+          (func (param i64) (result i32))
+          (func (result i64))
+          (func)
+        )
+      `);
+
+      assert.deepEqual(context.getFunction(0), {
+        args: ["i32"],
+        result: ["i64"]
+      });
+      assert.deepEqual(context.getFunction(1), {
+        args: ["i64"],
+        result: ["i32"]
+      });
+      assert.deepEqual(context.getFunction(2), { args: [], result: ["i64"] });
+      assert.deepEqual(context.getFunction(3), { args: [], result: [] });
+    });
+
+    it("should retrive the type of imported functions", () => {
+      const context = contextFromWast(`
+        (module
+          (import "a" "a" (func (param i32) (result i32)))
+          (import "a" "b" (func (result i64)))
+          (import "a" "c" (func))
+          (func (result f32))
+        )
+      `);
+
+      assert.deepEqual(context.getFunction(0), {
+        args: ["i32"],
+        result: ["i32"]
+      });
+      assert.deepEqual(context.getFunction(1), {
+        args: [],
+        result: ["i64"]
+      });
+      assert.deepEqual(context.getFunction(2), { args: [], result: [] });
+      assert.deepEqual(context.getFunction(3), { args: [], result: ["f32"] });
+    });
+
+    it("should retrive the type of functions with type ref", () => {
+      const context = contextFromWast(`
+        (module
+          (type (func (param i32) (result i32)))
+          (type (func (result i64)))
+          (type (func))
+
+          (import "a" "a" (func (type 0)))
+          (import "a" "b" (func (type 1)))
+          (func (type 2))
+        )
+      `);
+
+      assert.deepEqual(context.getFunction(0), {
+        args: ["i32"],
+        result: ["i32"]
+      });
+      assert.deepEqual(context.getFunction(1), {
+        args: [],
+        result: ["i64"]
+      });
+      assert.deepEqual(context.getFunction(2), { args: [], result: [] });
+    });
+  });
+});