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author | cuiweixie <cuiweixie@gmail.com> | 2022-04-25 05:21:35 +0000 |
---|---|---|
committer | Gopher Robot <gobot@golang.org> | 2022-04-25 23:18:00 +0000 |
commit | 892cd0b63638ec856e6fef1bdaaa20a177695fea (patch) | |
tree | 81aaa669d9374e17520c48b07601b7b5c1a1e370 /src/reflect/all_test.go | |
parent | 35f2aba2830483270249d4f34250e38af88bd33d (diff) | |
download | go-892cd0b63638ec856e6fef1bdaaa20a177695fea.tar.gz go-892cd0b63638ec856e6fef1bdaaa20a177695fea.zip |
reflect: support Len and Cap on pointer-to-array Value
Fixes #52411
Change-Id: I2fd13a453622992c52d49aade7cd058cfc8a77ca
GitHub-Last-Rev: d5987c2ec817ebd01d9e1adb3bd2e75274dbbabd
GitHub-Pull-Request: golang/go#52423
Reviewed-on: https://go-review.googlesource.com/c/go/+/400954
Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Keith Randall <khr@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Diffstat (limited to 'src/reflect/all_test.go')
-rw-r--r-- | src/reflect/all_test.go | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/src/reflect/all_test.go b/src/reflect/all_test.go index 72d01c7deb..9eb01bde35 100644 --- a/src/reflect/all_test.go +++ b/src/reflect/all_test.go @@ -7913,3 +7913,69 @@ func BenchmarkSliceCap(b *testing.B) { sinkAll.RawInt = sourceAll.SliceAny.Cap() } } + +func TestValue_Cap(t *testing.T) { + a := &[3]int{1, 2, 3} + v := ValueOf(a) + if v.Cap() != cap(a) { + t.Errorf("Cap = %d want %d", v.Cap(), cap(a)) + } + + a = nil + v = ValueOf(a) + if v.Cap() != cap(a) { + t.Errorf("Cap = %d want %d", v.Cap(), cap(a)) + } + + getError := func(f func()) (errorStr string) { + defer func() { + e := recover() + if str, ok := e.(string); ok { + errorStr = str + } + }() + f() + return + } + e := getError(func() { + var ptr *int + ValueOf(ptr).Cap() + }) + wantStr := "reflect: call of reflect.Value.Cap on ptr to non-array Value" + if e != wantStr { + t.Errorf("error is %q, want %q", e, wantStr) + } +} + +func TestValue_Len(t *testing.T) { + a := &[3]int{1, 2, 3} + v := ValueOf(a) + if v.Len() != len(a) { + t.Errorf("Len = %d want %d", v.Len(), len(a)) + } + + a = nil + v = ValueOf(a) + if v.Len() != len(a) { + t.Errorf("Len = %d want %d", v.Len(), len(a)) + } + + getError := func(f func()) (errorStr string) { + defer func() { + e := recover() + if str, ok := e.(string); ok { + errorStr = str + } + }() + f() + return + } + e := getError(func() { + var ptr *int + ValueOf(ptr).Len() + }) + wantStr := "reflect: call of reflect.Value.Len on ptr to non-array Value" + if e != wantStr { + t.Errorf("error is %q, want %q", e, wantStr) + } +} |