testdata_test.go

     1  // Copyright 2026 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  //go:build goexperiment.simd
     6  
     7  package simd_test
     8  
     9  import (
    10  	"internal/testenv"
    11  	"os"
    12  	"runtime"
    13  	"strings"
    14  	"testing"
    15  )
    16  
    17  func common(t *testing.T, dir, what, failWith string, moreEnv ...string) {
    18  	t.Helper()
    19  	t.Logf("subprocess test in testdata")
    20  	testenv.MustHaveGoRun(t)
    21  	args := []string{"test", "-C", dir}
    22  	if testing.Verbose() {
    23  		args = append(args, "-v")
    24  	}
    25  	args = append(args, what)
    26  	cmd := testenv.Command(t, testenv.GoToolPath(t), args...)
    27  
    28  	goexp := os.Getenv("GOEXPERIMENT")
    29  	if !strings.Contains(","+goexp+",", ",simd,") {
    30  		if goexp != "" {
    31  			goexp += ","
    32  		}
    33  		goexp += "simd"
    34  	}
    35  	cmd.Env = append(cmd.Environ(), "GOEXPERIMENT="+goexp)
    36  	cmd.Env = append(cmd.Env, moreEnv...)
    37  
    38  	if failWith == "" {
    39  		cmd.Stdout = os.Stdout
    40  		cmd.Stderr = os.Stderr
    41  		if err := cmd.Run(); err != nil {
    42  			t.Error(err)
    43  		}
    44  	} else {
    45  		combined, err := cmd.CombinedOutput()
    46  		combinedString := string(combined)
    47  		sawFailure := strings.Contains(combinedString, failWith)
    48  		if err == nil && !sawFailure {
    49  			t.Errorf("Saw no error and did not see expected failure string '%s' in '%s'", failWith, combinedString)
    50  		} else if err == nil && sawFailure {
    51  			t.Errorf("Saw no error but did see expected failure string '%s'", failWith)
    52  		} else if err != nil && !sawFailure {
    53  			t.Errorf("Saw error %v but did see expected failure string '%s' in '%s'", err, failWith, combinedString)
    54  		} else /* err != nil && sawFailure */ {
    55  			t.Logf("Saw error %v and expected failure string '%s'", err, failWith)
    56  		}
    57  	}
    58  }
    59  func TestIFace(t *testing.T) {
    60  	common(t, "testdata", "iface_test.go", "")
    61  }
    62  
    63  func TestSizeof(t *testing.T) {
    64  	common(t, "testdata", "sizeof_test.go", "")
    65  }
    66  
    67  func TestCompileOk(t *testing.T) {
    68  	common(t, "testdata", "compiles_test.go", "")
    69  }
    70  
    71  func TestCompileError(t *testing.T) {
    72  	common(t, "testdata", "errors_test.go",
    73  		"array length unsafe.Sizeof(v_from_simd) (value of type uintptr) must be constant")
    74  }
    75  
    76  func TestToString(t *testing.T) {
    77  	common(t, "testdata", "tostring_test.go", "")
    78  	if runtime.GOARCH == "amd64" || runtime.GOARCH == "arm64" {
    79  		common(t, "testdata", "tostring_test.go", "", "GODEBUG=simd=0")
    80  	}
    81  }
    82
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