Provide compiled JSON to TypeScript compiler. (#4404)

Fixes #4101

Previously, we would just provide the raw JSON to the TypeScript
compiler worker, but TypeScript does not transform JSON.  This caused
a problem when emitting a bundle, that the JSON would just be "inlined"
into the output, instead of being transformed into a module.

This fixes this problem by providing the compiled JSON to the TypeScript
compiler, so TypeScript just sees JSON as a "normal" TypeScript module.

1 files changed, 34 insertions, 0 deletions

diff --git a/cli/tests/integration_tests.rs b/cli/tests/integration_tests.rs
index 9cdf0af56..29203d411 100644
--- a/cli/tests/integration_tests.rs
+++ b/cli/tests/integration_tests.rs
@@ -399,6 +399,40 @@ fn bundle_single_module() {
 }
 
 #[test]
+fn bundle_json() {
+  use tempfile::TempDir;
+
+  let json_modules = util::root_path().join("cli/tests/020_json_modules.ts");
+  assert!(json_modules.is_file());
+  let t = TempDir::new().expect("tempdir fail");
+  let bundle = t.path().join("020_json_modules.bundle.js");
+  let mut deno = util::deno_cmd()
+    .current_dir(util::root_path())
+    .arg("bundle")
+    .arg(json_modules)
+    .arg(&bundle)
+    .spawn()
+    .expect("failed to spawn script");
+  let status = deno.wait().expect("failed to wait for the child process");
+  assert!(status.success());
+  assert!(bundle.is_file());
+
+  let output = util::deno_cmd()
+    .current_dir(util::root_path())
+    .arg("run")
+    .arg("--reload")
+    .arg(&bundle)
+    .output()
+    .expect("failed to spawn script");
+  // check the output of the the bundle program.
+  assert!(std::str::from_utf8(&output.stdout)
+    .unwrap()
+    .trim()
+    .ends_with("{\"foo\":{\"bar\":true,\"baz\":[\"qat\",1]}}"));
+  assert_eq!(output.stderr, b"");
+}
+
+#[test]
 fn bundle_tla() {
   // First we have to generate a bundle of some module that has exports.
   let tla_import = util::root_path().join("cli/tests/subdir/tla.ts");