chore: add doc for how to mock method (#47)

Author: HerrCai0907

a.ts

@@ -18,14 +18,19 @@ export default defineConfig({
           { text: "Quick Start", link: "/quick-start.md" },
           {
             text: "API documents",
-            link: "/api-documents/index",
+            link: "/api-documents",
             items: [
               { text: "Configuration", link: "/api-documents/configuration" },
               { text: "Matchers", link: "/api-documents/matchers" },
               { text: "Mock Function", link: "/api-documents/mock-function" },
               { text: "Report", link: "/api-documents/coverage-report" },
             ],
           },
+          {
+            text: "Examples",
+            link: "/examples",
+            items: [{ text: "Mock Method", link: "/examples/mock-method" }],
+          },
           {
             text: "Technical Details",
             items: [

docs/.vitepress/config.ts

@@ -0,0 +1,3 @@
+# Examples
+
+Here is some complex examples to show how to use assemblyscript-unittest-framework in a real projects.

docs/api-documents/index.md renamed to docs/api-documents.md

@@ -0,0 +1,17 @@
+## Mock Method
+
+Since AS doesn't fully support `this` as parameter in function type.
+We can cast the method to a normal function type and mock it.
+
+```typescript
+type Fn = (self: MockClass) => i32;
+test("class method mock", () => {
+  const mockClass = new MockClass();
+  mock<Fn>(changetype<Fn>(mockClass.method), (self: MockClass): i32 => {
+    self.v = 100;
+    return 1;
+  });
+  expect(mockClass.method()).equal(1);
+  expect(mockClass.v).equal(100);
+});
+```

docs/examples.md

@@ -1,4 +1,4 @@
-# Getting Started
+## Getting Started
 
 Install Assemblyscript Unittest Framework using npm