all: shorten some tests

Shorten some of the longest tests that run during all.bash.
Removes 7r 50u 21s from all.bash.

After this change, all.bash is under 5 minutes again on my laptop.

For #26473.

Change-Id: Ie0460aa935808d65460408feaed210fbaa1d5d79
Reviewed-on: https://go-review.googlesource.com/c/go/+/177559
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

3 files changed, 24 insertions, 3 deletions

diff --git a/src/mime/multipart/formdata_test.go b/src/mime/multipart/formdata_test.go
index 105a82c417..7d756c8c24 100644
--- a/src/mime/multipart/formdata_test.go
+++ b/src/mime/multipart/formdata_test.go
@@ -176,7 +176,11 @@ func (r *failOnReadAfterErrorReader) Read(p []byte) (n int, err error) {
 // TestReadForm_NonFileMaxMemory asserts that the ReadForm maxMemory limit is applied
 // while processing non-file form data as well as file form data.
 func TestReadForm_NonFileMaxMemory(t *testing.T) {
-	largeTextValue := strings.Repeat("1", (10<<20)+25)
+	n := 10<<20 + 25
+	if testing.Short() {
+		n = 10<<10 + 25
+	}
+	largeTextValue := strings.Repeat("1", n)
 	message := `--MyBoundary
 Content-Disposition: form-data; name="largetext"
 
@@ -196,6 +200,9 @@ Content-Disposition: form-data; name="largetext"
 	}
 	for _, tc := range testCases {
 		t.Run(tc.name, func(t *testing.T) {
+			if tc.maxMemory == 0 && testing.Short() {
+				t.Skip("skipping in -short mode")
+			}
 			b := strings.NewReader(testBody)
 			r := NewReader(b, boundary)
 			f, err := r.ReadForm(tc.maxMemory)
diff --git a/src/mime/multipart/multipart_test.go b/src/mime/multipart/multipart_test.go
index 5a8102b822..5dc74b5ffe 100644
--- a/src/mime/multipart/multipart_test.go
+++ b/src/mime/multipart/multipart_test.go
@@ -832,7 +832,10 @@ func partsFromReader(r *Reader) ([]headerBody, error) {
 
 func TestParseAllSizes(t *testing.T) {
 	t.Parallel()
-	const maxSize = 5 << 10
+	maxSize := 5 << 10
+	if testing.Short() {
+		maxSize = 512
+	}
 	var buf bytes.Buffer
 	body := strings.Repeat("a", maxSize)
 	bodyb := []byte(body)
diff --git a/src/mime/quotedprintable/reader_test.go b/src/mime/quotedprintable/reader_test.go
index f870bdaa8d..48a7ff6495 100644
--- a/src/mime/quotedprintable/reader_test.go
+++ b/src/mime/quotedprintable/reader_test.go
@@ -116,7 +116,11 @@ func TestExhaustive(t *testing.T) {
 
 	var buf bytes.Buffer
 	res := make(map[string]int)
-	everySequence("", "0A \r\n=", 6, func(s string) {
+	n := 6
+	if testing.Short() {
+		n = 4
+	}
+	everySequence("", "0A \r\n=", n, func(s string) {
 		if strings.HasSuffix(s, "=") || strings.Contains(s, "==") {
 			return
 		}
@@ -200,6 +204,13 @@ func TestExhaustive(t *testing.T) {
 invalid bytes after =: 3949
 quotedprintable: invalid hex byte 0x0d: 2048
 unexpected EOF: 194`
+	if testing.Short() {
+		want = `OK: 896
+invalid bytes after =: 100
+quotedprintable: invalid hex byte 0x0d: 26
+unexpected EOF: 3`
+	}
+
 	if got != want {
 		t.Errorf("Got:\n%s\nWant:\n%s", got, want)
 	}