6 files changed, 131 insertions, 9 deletions
diff --git a/cli/tests/testdata/run/stdin_read_all.out b/cli/tests/testdata/run/stdin_read_all.out
new file mode 100644
index 000000000..2f0dfb71a
--- /dev/null
+++ b/cli/tests/testdata/run/stdin_read_all.out
@@ -0,0 +1 @@
+01234567890123456789012345678901234567890123456789
diff --git a/cli/tests/testdata/run/stdin_read_all.ts b/cli/tests/testdata/run/stdin_read_all.ts
new file mode 100644
index 000000000..d683a2bf6
--- /dev/null
+++ b/cli/tests/testdata/run/stdin_read_all.ts
@@ -0,0 +1,17 @@
+const encoder = new TextEncoder();
+
+const pending = [];
+
+// do this a bunch of times to ensure it doesn't race
+// and everything happens in order
+for (let i = 0; i < 50; i++) {
+  const buf = new Uint8Array(1);
+  pending.push(
+    Deno.stdin.read(buf).then(() => {
+      return Deno.stdout.write(buf);
+    }),
+  );
+}
+
+await Promise.all(pending);
+await Deno.stdout.write(encoder.encode("\n"));
diff --git a/cli/tests/testdata/run/stdout_write_all.out b/cli/tests/testdata/run/stdout_write_all.out
new file mode 100644
index 000000000..d0e667fd4
--- /dev/null
+++ b/cli/tests/testdata/run/stdout_write_all.out
@@ -0,0 +1,100 @@
+Hello, world! 0
+Hello, world! 1
+Hello, world! 2
+Hello, world! 3
+Hello, world! 4
+Hello, world! 5
+Hello, world! 6
+Hello, world! 7
+Hello, world! 8
+Hello, world! 9
+Hello, world! 10
+Hello, world! 11
+Hello, world! 12
+Hello, world! 13
+Hello, world! 14
+Hello, world! 15
+Hello, world! 16
+Hello, world! 17
+Hello, world! 18
+Hello, world! 19
+Hello, world! 20
+Hello, world! 21
+Hello, world! 22
+Hello, world! 23
+Hello, world! 24
+Hello, world! 25
+Hello, world! 26
+Hello, world! 27
+Hello, world! 28
+Hello, world! 29
+Hello, world! 30
+Hello, world! 31
+Hello, world! 32
+Hello, world! 33
+Hello, world! 34
+Hello, world! 35
+Hello, world! 36
+Hello, world! 37
+Hello, world! 38
+Hello, world! 39
+Hello, world! 40
+Hello, world! 41
+Hello, world! 42
+Hello, world! 43
+Hello, world! 44
+Hello, world! 45
+Hello, world! 46
+Hello, world! 47
+Hello, world! 48
+Hello, world! 49
+Hello, world! 50
+Hello, world! 51
+Hello, world! 52
+Hello, world! 53
+Hello, world! 54
+Hello, world! 55
+Hello, world! 56
+Hello, world! 57
+Hello, world! 58
+Hello, world! 59
+Hello, world! 60
+Hello, world! 61
+Hello, world! 62
+Hello, world! 63
+Hello, world! 64
+Hello, world! 65
+Hello, world! 66
+Hello, world! 67
+Hello, world! 68
+Hello, world! 69
+Hello, world! 70
+Hello, world! 71
+Hello, world! 72
+Hello, world! 73
+Hello, world! 74
+Hello, world! 75
+Hello, world! 76
+Hello, world! 77
+Hello, world! 78
+Hello, world! 79
+Hello, world! 80
+Hello, world! 81
+Hello, world! 82
+Hello, world! 83
+Hello, world! 84
+Hello, world! 85
+Hello, world! 86
+Hello, world! 87
+Hello, world! 88
+Hello, world! 89
+Hello, world! 90
+Hello, world! 91
+Hello, world! 92
+Hello, world! 93
+Hello, world! 94
+Hello, world! 95
+Hello, world! 96
+Hello, world! 97
+Hello, world! 98
+Hello, world! 99
diff --git a/cli/tests/testdata/run/stdout_write_all.ts b/cli/tests/testdata/run/stdout_write_all.ts
new file mode 100644
index 000000000..cfb2981e4
--- /dev/null
+++ b/cli/tests/testdata/run/stdout_write_all.ts
@@ -0,0 +1,13 @@
+const encoder = new TextEncoder();
+
+const pending = [];
+
+// do this a bunch of times to ensure it doesn't race
+// and everything happens in order
+for (let i = 0; i < 100; i++) {
+  pending.push(Deno.stdout.write(encoder.encode("Hello, ")));
+  pending.push(Deno.stdout.write(encoder.encode(`world! ${i}`)));
+  pending.push(Deno.stdout.write(encoder.encode("\n")));
+}
+
+await Promise.all(pending);
diff --git a/cli/tests/testdata/stdout_write_all.out b/cli/tests/testdata/stdout_write_all.out
deleted file mode 100644
index af5626b4a..000000000
--- a/cli/tests/testdata/stdout_write_all.out
+++ /dev/null
@@ -1 +0,0 @@
-Hello, world!
diff --git a/cli/tests/testdata/stdout_write_all.ts b/cli/tests/testdata/stdout_write_all.ts
deleted file mode 100644
index 623bd8f53..000000000
--- a/cli/tests/testdata/stdout_write_all.ts
+++ /dev/null
@@ -1,8 +0,0 @@
-const encoder = new TextEncoder();
-const pending = [
-  Deno.stdout.write(encoder.encode("Hello, ")),
-  Deno.stdout.write(encoder.encode("world!")),
-];
-
-await Promise.all(pending);
-await Deno.stdout.write(encoder.encode("\n"));