2 files changed, 72 insertions, 65 deletions
diff --git a/test/gleam_json_js_ffi_test.gleam b/test/gleam_json_js_ffi_test.gleam
index f746ce2..df1b763 100644
--- a/test/gleam_json_js_ffi_test.gleam
+++ b/test/gleam_json_js_ffi_test.gleam
@@ -1,67 +1,76 @@
-if javascript {
-  import gleam/json.{DecodeError, UnexpectedByte, UnexpectedEndOfInput}
-  import gleeunit/should
+@target(javascript)
+import gleam/json.{DecodeError, UnexpectedByte, UnexpectedEndOfInput}
+@target(javascript)
+import gleeunit/should
 
-  type StandardError {
-    StandardError(message: String)
-  }
-
-  // === End of input tests === //
-  pub fn chromium_end_of_input_test() {
-    "Unexpected end of JSON input"
-    |> StandardError
-    |> get_json_decode_error("")
-    |> should.equal(UnexpectedEndOfInput)
-  }
+@target(javascript)
+type StandardError {
+  StandardError(message: String)
+}
 
-  pub fn spidermonkey_end_of_input_test() {
-    "JSON.parse: unexpected end of data at line 1 column 1 of the JSON data"
-    |> StandardError
-    |> get_json_decode_error("")
-    |> should.equal(UnexpectedEndOfInput)
-  }
+// === End of input tests === //
+@target(javascript)
+pub fn chromium_end_of_input_test() {
+  "Unexpected end of JSON input"
+  |> StandardError
+  |> get_json_decode_error("")
+  |> should.equal(UnexpectedEndOfInput)
+}
 
-  pub fn javascript_core_end_of_input_test() {
-    "JSON Parse error: Unexpected EOF"
-    |> StandardError
-    |> get_json_decode_error("")
-    |> should.equal(UnexpectedEndOfInput)
-  }
+@target(javascript)
+pub fn spidermonkey_end_of_input_test() {
+  "JSON.parse: unexpected end of data at line 1 column 1 of the JSON data"
+  |> StandardError
+  |> get_json_decode_error("")
+  |> should.equal(UnexpectedEndOfInput)
+}
 
-  // === Unexpected byte tests === //
-  pub fn chromium_unexpected_byte_test() {
-    "Unexpected token a in JSON at position 5"
-    |> StandardError
-    |> get_json_decode_error("{\"b\":a}")
-    |> should.equal(UnexpectedByte(byte: "0x61", position: 5))
-  }
+@target(javascript)
+pub fn javascript_core_end_of_input_test() {
+  "JSON Parse error: Unexpected EOF"
+  |> StandardError
+  |> get_json_decode_error("")
+  |> should.equal(UnexpectedEndOfInput)
+}
 
-  pub fn spidermonkey_unexpected_byte_test() {
-    "JSON.parse: expected property name or '}' at line 1 column 6 of the JSON data"
-    |> StandardError
-    |> get_json_decode_error("{\"b\":a}")
-    |> should.equal(UnexpectedByte(byte: "0x61", position: 5))
-  }
+// === Unexpected byte tests === //
+@target(javascript)
+pub fn chromium_unexpected_byte_test() {
+  "Unexpected token a in JSON at position 5"
+  |> StandardError
+  |> get_json_decode_error("{\"b\":a}")
+  |> should.equal(UnexpectedByte(byte: "0x61", position: 5))
+}
 
-  pub fn javascript_core_unexpected_byte_test() {
-    "JSON Parse error: Unexpected identifier \"a\""
-    |> StandardError
-    |> get_json_decode_error("{\"b\":a}")
-    |> should.equal(UnexpectedByte(byte: "0x61", position: 0))
-  }
+@target(javascript)
+pub fn spidermonkey_unexpected_byte_test() {
+  "JSON.parse: expected property name or '}' at line 1 column 6 of the JSON data"
+  |> StandardError
+  |> get_json_decode_error("{\"b\":a}")
+  |> should.equal(UnexpectedByte(byte: "0x61", position: 5))
+}
 
-  pub fn spidermonkey_multiline_unexpected_byte_test() {
-    "JSON.parse: expected property name or '}' at line 2 column 6 of the JSON data"
-    |> StandardError
-    |> get_json_decode_error("{\n\"b\": a\n}")
-    |> should.equal(UnexpectedByte(byte: "0x61", position: 7))
+@target(javascript)
+pub fn javascript_core_unexpected_byte_test() {
+  "JSON Parse error: Unexpected identifier \"a\""
+  |> StandardError
+  |> get_json_decode_error("{\"b\":a}")
+  |> should.equal(UnexpectedByte(byte: "0x61", position: 0))
+}
 
-    "JSON.parse: expected double-quoted property name at line 3 column 1 of the JSON data"
-    |> StandardError
-    |> get_json_decode_error("{\n\"b\": \"x\",\na\n}")
-    |> should.equal(UnexpectedByte(byte: "0x61", position: 12))
-  }
+@target(javascript)
+pub fn spidermonkey_multiline_unexpected_byte_test() {
+  "JSON.parse: expected property name or '}' at line 2 column 6 of the JSON data"
+  |> StandardError
+  |> get_json_decode_error("{\n\"b\": a\n}")
+  |> should.equal(UnexpectedByte(byte: "0x61", position: 7))
 
-  external fn get_json_decode_error(StandardError, String) -> DecodeError =
-    "./gleam_json_ffi.mjs" "getJsonDecodeError"
+  "JSON.parse: expected double-quoted property name at line 3 column 1 of the JSON data"
+  |> StandardError
+  |> get_json_decode_error("{\n\"b\": \"x\",\na\n}")
+  |> should.equal(UnexpectedByte(byte: "0x61", position: 12))
 }
+
+@target(javascript)
+@external(javascript, "./gleam_json_ffi.mjs", "getJsonDecodeError")
+fn get_json_decode_error(a: StandardError, b: String) -> DecodeError
diff --git a/test/gleam_json_test.gleam b/test/gleam_json_test.gleam
index 69c5550..f27edce 100644
--- a/test/gleam_json_test.gleam
+++ b/test/gleam_json_test.gleam
@@ -130,14 +130,12 @@ fn should_encode(data: Json, expected: String) {
   |> should.equal(json.to_string(data))
 }
 
-if erlang {
-  fn empty_list_decode_error() -> dynamic.DecodeError {
-    dynamic.DecodeError(expected: "Int", found: "List", path: [])
-  }
+@target(erlang)
+fn empty_list_decode_error() -> dynamic.DecodeError {
+  dynamic.DecodeError(expected: "Int", found: "List", path: [])
 }
 
-if javascript {
-  fn empty_list_decode_error() {
-    dynamic.DecodeError(expected: "Int", found: "Tuple of 0 elements", path: [])
-  }
+@target(javascript)
+fn empty_list_decode_error() {
+  dynamic.DecodeError(expected: "Int", found: "Tuple of 0 elements", path: [])
 }