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-rw-r--r--tests/testdata/npm/node_modules_import/main.out3
-rw-r--r--tests/testdata/npm/node_modules_import/main.ts16
-rw-r--r--tests/testdata/npm/node_modules_import/main_check.out16
-rw-r--r--tests/testdata/npm/node_modules_import/package.json5
4 files changed, 40 insertions, 0 deletions
diff --git a/tests/testdata/npm/node_modules_import/main.out b/tests/testdata/npm/node_modules_import/main.out
new file mode 100644
index 000000000..083edaac2
--- /dev/null
+++ b/tests/testdata/npm/node_modules_import/main.out
@@ -0,0 +1,3 @@
+2
+2
+2
diff --git a/tests/testdata/npm/node_modules_import/main.ts b/tests/testdata/npm/node_modules_import/main.ts
new file mode 100644
index 000000000..848ca0f81
--- /dev/null
+++ b/tests/testdata/npm/node_modules_import/main.ts
@@ -0,0 +1,16 @@
+import * as myImport1 from "@denotest/esm-basic";
+import * as myImport2 from "./node_modules/@denotest/esm-basic/main.mjs";
+import * as myImport3 from "@denotest/esm-basic/main.mjs";
+
+myImport1.setValue(5);
+myImport2.setValue(2);
+
+// these should all give type errors
+const value1: string = myImport1.getValue();
+const value2: string = myImport2.getValue();
+const value3: string = myImport3.getValue();
+
+// these should all be equal because it should be mutating the same module
+console.log(value1);
+console.log(value2);
+console.log(value3);
diff --git a/tests/testdata/npm/node_modules_import/main_check.out b/tests/testdata/npm/node_modules_import/main_check.out
new file mode 100644
index 000000000..cf7cc110d
--- /dev/null
+++ b/tests/testdata/npm/node_modules_import/main_check.out
@@ -0,0 +1,16 @@
+error: TS2322 [ERROR]: Type 'number' is not assignable to type 'string'.
+const value1: string = myImport1.getValue();
+ ~~~~~~
+ at file:///[WILDCARD]/npm/node_modules_import/main.ts:9:7
+
+TS2322 [ERROR]: Type 'number' is not assignable to type 'string'.
+const value2: string = myImport2.getValue();
+ ~~~~~~
+ at file:///[WILDCARD]/npm/node_modules_import/main.ts:10:7
+
+TS2322 [ERROR]: Type 'number' is not assignable to type 'string'.
+const value3: string = myImport3.getValue();
+ ~~~~~~
+ at file:///[WILDCARD]/npm/node_modules_import/main.ts:11:7
+
+Found 3 errors.
diff --git a/tests/testdata/npm/node_modules_import/package.json b/tests/testdata/npm/node_modules_import/package.json
new file mode 100644
index 000000000..ed77298e0
--- /dev/null
+++ b/tests/testdata/npm/node_modules_import/package.json
@@ -0,0 +1,5 @@
+{
+ "dependencies": {
+ "@denotest/esm-basic": "^1"
+ }
+}