Expand Gotlin language and tooling

internal/lang/foreach_test.go

@@ -0,0 +1,31 @@
+package lang
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestGenerateGoForEach(t *testing.T) {
+	prog, err := Parse(`
+package demo
+
+fun main() {
+    val accounts: List<String> = listOf("one", "two")
+    for (account in accounts) {
+        println(account)
+    }
+}
+`)
+	if err != nil {
+		t.Fatalf("parse failed: %v", err)
+	}
+	out, err := GenerateGo(prog)
+	if err != nil {
+		t.Fatalf("generation failed: %v", err)
+	}
+	for _, want := range []string{"for _, account := range accounts {", "fmt.Println(account)"} {
+		if !strings.Contains(string(out), want) {
+			t.Fatalf("generated Go missing %q:\n%s", want, out)
+		}
+	}
+}