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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: [] });
});
});
});