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  	"strings"
    13  	"testing"
    14  )
    15  
    16  func common(t *testing.T, dir, what, failWith string) {
    17  	t.Helper()
    18  	t.Logf("subprocess test in testdata")
    19  	testenv.MustHaveGoRun(t)
    20  	args := []string{"test", "-C", dir}
    21  	if testing.Verbose() {
    22  		args = append(args, "-v")
    23  	}
    24  	args = append(args, what)
    25  	cmd := testenv.Command(t, testenv.GoToolPath(t), args...)
    26  
    27  	goexp := os.Getenv("GOEXPERIMENT")
    28  	if !strings.Contains(","+goexp+",", ",simd,") {
    29  		if goexp != "" {
    30  			goexp += ","
    31  		}
    32  		goexp += "simd"
    33  	}
    34  	cmd.Env = append(cmd.Environ(), "GOEXPERIMENT="+goexp)
    35  
    36  	if failWith == "" {
    37  		cmd.Stdout = os.Stdout
    38  		cmd.Stderr = os.Stderr
    39  		if err := cmd.Run(); err != nil {
    40  			t.Error(err)
    41  		}
    42  	} else {
    43  		combined, err := cmd.CombinedOutput()
    44  		combinedString := string(combined)
    45  		sawFailure := strings.Contains(combinedString, failWith)
    46  		if err == nil && !sawFailure {
    47  			t.Errorf("Saw no error and did not see expected failure string '%s' in '%s'", failWith, combinedString)
    48  		} else if err == nil && sawFailure {
    49  			t.Errorf("Saw no error but did see expected failure string '%s'", failWith)
    50  		} else if err != nil && !sawFailure {
    51  			t.Errorf("Saw error %v but did see expected failure string '%s' in '%s'", err, failWith, combinedString)
    52  		} else /* err != nil && sawFailure */ {
    53  			t.Logf("Saw error %v and expected failure string '%s'", err, failWith)
    54  		}
    55  	}
    56  }
    57  func TestIFace(t *testing.T) {
    58  	common(t, "testdata", "iface_test.go", "")
    59  }
    60  
    61  func TestSizeof(t *testing.T) {
    62  	common(t, "testdata", "sizeof_test.go", "")
    63  }
    64  
    65  func TestCompileOk(t *testing.T) {
    66  	common(t, "testdata", "compiles_test.go", "")
    67  }
    68  
    69  func TestCompileError(t *testing.T) {
    70  	common(t, "testdata", "errors_test.go",
    71  		"array length unsafe.Sizeof(v_from_simd) (value of type uintptr) must be constant")
    72  }
    73
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