Fix utf8 interpolation

kateinoigakukun · kateinoigakukun · commit c87cf078b75d · 2020-03-10T00:53:17.000+09:00
diff --git a/IntegrationTests/JavaScriptKitExec/Sources/JavaScriptKitExec/main.swift b/IntegrationTests/JavaScriptKitExec/Sources/JavaScriptKitExec/main.swift
@@ -6,6 +6,7 @@ Literal_Conversion: do {
         .boolean(true),
         .boolean(false),
         .string("foobar"),
+        .string("👨‍👩‍👧‍👧 Family Emoji"),
         .number(0),
         .number(.max),
         .number(.min),
diff --git a/Runtime/src/index.ts b/Runtime/src/index.ts
@@ -206,10 +206,11 @@ export class SwiftRuntime {
                     }
                 }
                 case "string": {
+                    const bytes = textEncoder.encode(value);
                     return {
                         kind: JavaScriptValueKind.String,
                         payload1: this.heap.allocHeap(value),
-                        payload2: value.length,
+                        payload2: bytes.length,
                     }
                 }
                 case "undefined": {

Original file line number	Diff line number	Diff line change
`@@ -206,10 +206,11 @@ export class SwiftRuntime {`
`206`	`206`	`}`
`207`	`207`	`}`
`208`	`208`	`case "string": {`
	`209`	`+ const bytes = textEncoder.encode(value);`
`209`	`210`	`return {`
`210`	`211`	`kind: JavaScriptValueKind.String,`
`211`	`212`	`payload1: this.heap.allocHeap(value),`
`212`		`- payload2: value.length,`
	`213`	`+ payload2: bytes.length,`
`213`	`214`	`}`
`214`	`215`	`}`
`215`	`216`	`case "undefined": {`