fix(compile): make output more deterministic (#25092)

Closes https://github.com/denoland/deno/issues/25084

3 files changed, 47 insertions, 0 deletions

diff --git a/tests/specs/compile/determinism/__test__.jsonc b/tests/specs/compile/determinism/__test__.jsonc
new file mode 100644
index 000000000..97045744f
--- /dev/null
+++ b/tests/specs/compile/determinism/__test__.jsonc
@@ -0,0 +1,28 @@
+{
+  "tempDir": true,
+  "steps": [{
+    "if": "unix",
+    "args": "compile --output main1 main.ts",
+    "output": "[WILDCARD]"
+  }, {
+    "if": "unix",
+    "args": "compile --output main2 main.ts",
+    "output": "[WILDCARD]"
+  }, {
+    "if": "unix",
+    "args": "run --allow-read=. assert_equal.ts main1 main2",
+    "output": "Same\n"
+  }, {
+    "if": "windows",
+    "args": "compile --output main1.exe main.ts",
+    "output": "[WILDCARD]"
+  }, {
+    "if": "windows",
+    "args": "compile --output main2.exe main.ts",
+    "output": "[WILDCARD]"
+  }, {
+    "if": "windows",
+    "args": "run --allow-read=. assert_equal.ts main1.exe main2.exe",
+    "output": "Same\n"
+  }]
+}
diff --git a/tests/specs/compile/determinism/assert_equal.ts b/tests/specs/compile/determinism/assert_equal.ts
new file mode 100644
index 000000000..c99bdf16c
--- /dev/null
+++ b/tests/specs/compile/determinism/assert_equal.ts
@@ -0,0 +1,15 @@
+const file1 = Deno.readFileSync(Deno.args[0]);
+const file2 = Deno.readFileSync(Deno.args[1]);
+
+if (file1.length !== file2.length) {
+  console.error("File lengths are different");
+  Deno.exit(1);
+}
+for (let i = 0; i < file1.length; i++) {
+  if (file1[i] !== file2[i]) {
+    console.error("Files are different");
+    Deno.exit(1);
+  }
+}
+
+console.error("Same");
diff --git a/tests/specs/compile/determinism/main.ts b/tests/specs/compile/determinism/main.ts
new file mode 100644
index 000000000..602388bb7
--- /dev/null
+++ b/tests/specs/compile/determinism/main.ts
@@ -0,0 +1,4 @@
+import "npm:@denotest/esm-basic";
+import "npm:@denotest/add";
+import "npm:@denotest/subtract";
+import "npm:preact";